##### Table of Contents

As filed with the Securities and Exchange Commission on April 26, 2012.







SECURITIES AND EXCHANGE
COMMISSION

Washington, DC 20549





FORM 20-F





ANNUAL REPORT
PURSUANT TO SECTION 13 or 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended: December 31, 2011

Commission File Number: 001-32741

Teléfonos de México,
S.A.B. de C.V.

(Exact name of Registrant as specified in its charter)

Telephones of Mexico

(Translation of Registrants name into English)

United Mexican
States

(Jurisdiction of incorporation or organization)

Parque Vía 190, Colonia Cuauhtémoc, 06599 México, D.F., México

(Address of principal executive offices)

Anna Domínguez González

Teléfonos de México,
S.A.B. de C.V.

Parque Vía 198, piso 7, oficina 701

Colonia Cuauhtémoc

06599 México, D.F., México

ri@telmex.com

Tel: (52) 55 52 22 17 74

(Name, Telephone, E-mail and/or Facsimile number and Address of Company Contact Person)

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:*



|                                                                                                        |  |                                                      
|------------------------------------------------------------------------------------------------------- |  | -----------------------------------------------------
|Title of each class                                                                                     |  | Name of each exchangeon which
registered             
|American Depositary Shares, each representing 20 Series L Shares, without par value 
(L Share ADSs)** |  | New York Stock Exchange                              
|                                                                                                        | 
|Series L Shares, without par value (L Shares)                                                         |  | New York Stock Exchange (for listing purposes only)  
|                                                                                                        | 
|American Depositary Shares, each representing 20 Series A Shares, without par value (A Share ADSs)**  |  | The NASDAQ Capital Market                            
|                                                                                                        | 
|Series A Shares, without par value (A Shares)                                                         |  | The NASDAQ Capital Market (for listing purposes only)
|                                                                                                        | 
|8.75% Senior Notes due 2016                                                                             |  | New York Stock Exchange                              

SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:

None

SECURITIES FOR WHICH THERE IS A
REPORTING OBLIGATION PURSUANT TO SECTION 15(d) OF THE ACT:

None

The number of outstanding shares of each class of capital or common stock as of December 31, 2011 was:



|              |  |  |  |           |  | 
|------------- |  |  |  | --------- |  | 
|7,840 million |  |  |  | AA Shares |  | 
|366 million   |  |  |  | A Shares  |  | 
|9,824 million |  |  |  | L Shares  |  | 



|* | The registration of each class of securities below will terminate on April 30, 2012 pursuant to the Forms 25 filed with the U.S. Securities and Exchange Commission
on January 31, 2012.
|- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|** | The deposit agreements governing the ADSs were terminated effective January 30, 2012.
|-- | -------------------------------------------------------------------------------------

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

 ̈  Yes            x  No

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to
Section 13 or 15(d) of the Securities Exchange Act of 1934.

 ̈  Yes            x  No

Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing
requirements for the past 90 days.

x  Yes             ̈  No

Indicate by check mark whether the registrant has submitted electronically and
posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that
the registrant was required to submit and post such files). N/A

Indicate by check mark whether the registrant is a large accelerated
filer, an accelerated filer, or a non-accelerated filer. See definition of accelerated filer and large accelerated filer in Rule 12b-2 of the Exchange Act. (Check one):

Large Accelerated
filer  x            Accelerated
filer   ̈            Non-accelerated filer   ̈

Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing:



|                       |  |                                                                                                                    |  |                   
|---------------------- |  | ------------------------------------------------------------------------------------------------------------------ |  | ------------------
|U.S. GAAP             ̈ |  | International Financial Reporting            x Standards as issued by the International Accounting Standards Board |  | Other             ̈

If Other has been checked in response to the previous question, indicate by check mark which financial
statement item the registrant has elected to follow. N/A

If this is an annual report, indicate by check mark whether the registrant is
a shell company (as defined in Rule 12b-2 of the Exchange Act).

 ̈  Yes            x  No









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TABLE OF CONTENTS



|          |  |                                                                                |  |      |    | 
|--------- |  | ------------------------------------------------------------------------------ |  | ---- | -- | 
|          |  |                                                                                |  | Page |   
|          |  |                                                                               
|          |  | Forward-Looking Statements                                                     |  |      | 1  | 
|Item 1.   |  | Identity of Directors, Senior Management and Advisers                          |  |      | 2  | 
|Item 2.   |  | Offer Statistics and Expected Timetable                                        |  |      | 2  | 
|Item 3.   |  | Key Information                                                                |  |      | 2  | 
|          |  | Selected Financial Data                                                        |  |      | 2  | 
|          |  | Exchange Rates                                                                 |  |      | 4  | 
|          |  | Risk Factors                                                                   |  |      | 5  | 
|Item 4.   |  | Information on the Company                                                     |  |      | 11 | 
|          |  | General                                                                        |  |      | 11 | 
|          |  | Operations                                                                     |  |      | 14 | 
|          |  | Regulation                                                                     |  |      | 21 | 
|          |  | Capital Expenditures                                                           |  |      | 27 | 
|          |  | Other Matters                                                                  |  |      | 28 | 
|Item 4A.  |  | Unresolved Staff Comments                                                      |  |      | 28 | 
|Item 5.   |  | Operating and Financial Review and Prospects                                   |  |      | 28 | 
|Item 6.   |  | Directors, Senior Management and Employees                                     |  |      | 40 | 
|Item 7.   |  | Major Shareholders and Related Party Transactions                              |  |      | 51 | 
|          |  | Major Shareholders                                                             |  |      | 51 | 
|          |  | Related Party Transactions                                                     |  |      | 53 | 
|Item 8.   |  | Financial Information                                                          |  |      | 55 | 
|          |  | Consolidated Financial Statements                                              |  |      | 55 | 
|          |  | Legal Proceedings                                                              |  |      | 55 | 
|          |  | Dividends                                                                      |  |      | 56 | 
|Item 9.   |  | The Offer and Listing                                                          |  |      | 57 | 
|          |  | Trading Market                                                                 |  |      | 57 | 
|          |  | Trading On The Mexican Stock Exchange                                          |  |      | 60 | 
|Item 10.  |  | Additional Information                                                         |  |      | 61 | 
|          |  | Bylaws And Mexican Law                                                         |  |      | 61 | 
|          |  | Certain Contracts                                                              |  |      | 66 | 
|          |  | Exchange Controls                                                              |  |      | 66 | 
|          |  | Taxation                                                                       |  |      | 66 | 
|          |  | Documents On Display                                                           |  |      | 71 | 
|Item 11.  |  | Quantitative and Qualitative Disclosures about Market Risk                     |  |      | 71 | 
|          |  | Exchange Rate And Interest Rate Risks                                          |  |      | 71 | 
|          |  | Sensitivity Analysis Disclosures                                               |  |      | 71 | 
|Item 12.  |  | Description of Securities Other Than Equity Securities                         |  |      | 72 | 
|Item 12D. |  | American Depositary Shares                                                     |  |      | 72 | 
|Item 13.  |  | Defaults, Dividend Arrearages and Delinquencies                                |  |      | 73 | 
|Item 14.  |  | Material Modifications to the Rights of Securities Holders and Use of Proceeds |  |      | 73 | 
|Item 15.  |  | Controls and Procedures                                                        |  |      | 73 | 
|Item 16A. |  | Audit Committee Financial Expert                                               |  |      | 76 | 
|Item 16B. |  | Code of Ethics                                                                 |  |      | 76 | 
|Item 16C. |  | Principal Accountant Fees and Services                                         |  |      | 77 | 
|Item 16D. |  | Exemptions from the Listing Standards for Audit Committees                     |  |      | 77 | 
|Item 16E. |  | Purchases of Equity Securities by the Issuer and Affiliated Purchasers         |  |      | 77 | 
|Item 16F. |  | Change in Registrants Certifying Accountant                                   |  |      | 79 | 
|Item 16G. |  | Corporate Governance                                                           |  |      | 79 | 
|Item 16H. |  | Mine Safety Disclosure                                                         |  |      | 79 | 



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|         |  |                      |  |  |    | 
|-------- |  | -------------------- |  |  | -- | 
|Item 17. |  | Financial Statements |  |  | 80 | 
|Item 18. |  | Financial Statements |  |  | 80 | 
|Item 19. |  | Exhibits             |  |  | 80 | 



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FORWARD-LOOKING STATEMENTS

This annual report contains forward-looking statements. We may from time to time make forward-looking statements in our periodic reports
to the United States Securities and Exchange Commission (SEC) on Form 6-K, in our annual report to shareholders, in offering circulars and prospectuses, in press releases and other written materials and in oral statements made by our
officers, directors or employees to analysts, investors, representatives of the media and others. Examples of such forward-looking statements include:



| |  |  | projections of operating revenues, net income, net income per share, capital expenditures, indebtedness levels, dividends, capital structure or other
financial items or ratios;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | statements of our acquisition or divestiture plans;
| | - |  | ---------------------------------------------------



| |  |  | statements about the impact of our acquisition of businesses;
| | - |  | -------------------------------------------------------------



| |  |  | statements about our plans, objectives or goals, including those relating to competition, regulation and prices;
| | - |  | ----------------------------------------------------------------------------------------------------------------



| |  |  | statements about competition in the business sectors in which we operate;
| | - |  | -------------------------------------------------------------------------



| |  |  | statements about our future financial performance or the economic performance of Mexico or other countries;
| | - |  | -----------------------------------------------------------------------------------------------------------



| |  |  | statements about interest rates, currency exchange rates and foreign securities markets;
| | - |  | ----------------------------------------------------------------------------------------



| |  |  | statements about the availability and cost of external financing for our operations, which have been affected by the stress experienced by the global
financial markets;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | statements about the renewal, revocation or expropriation of our concessions, decisions of regulatory and judicial authorities, and the future impact
of regulations; and
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | statements of assumptions underlying such statements.
| | - |  | -----------------------------------------------------

Words such as believe, anticipate, plan, expect, intend, target, estimate, project, predict,
forecast, guideline, should and similar expressions are intended to identify forward-looking statements but are not the exclusive means of identifying them.

Forward-looking statements involve inherent risks and uncertainties. We caution you that a number of important factors could cause actual
results to differ materially from the plans, objectives, expectations, estimates and intentions expressed in such forward-looking statements. These factors, some of which are discussed under Item 3. Key Information  Risk Factors
beginning on page 5, include regulatory developments, economic and political conditions, which have been affected by the global economic crisis, competition, customer demand, government policies, inflation rates, exchange rates and technological
changes. We caution you that the foregoing list of factors is not exclusive and that other risks and uncertainties may cause actual results to differ materially from those in forward-looking statements.

Forward-looking statements speak only as of the date they are made. We undertake no obligation to publicly update or revise any
forward-looking statements, whether as a result of new information or future events or for any other reason.

You should
evaluate any statements made by us in light of these important factors.



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##### Table of Contents

PART I



|Item 1. | Identity of Directors, Senior Management and Advisers
|------- | -----------------------------------------------------

Not applicable.



|Item 2. | Offer Statistics and Expected Timetable
|------- | ---------------------------------------

Not applicable.



|Item 3. | Key Information
|------- | ---------------

SELECTED FINANCIAL DATA

The selected consolidated financial data set forth below have been derived from our audited
consolidated financial statements for each of the two years in the period ended December 31, 2011, which have been audited by Mancera, S.C., a member practice of Ernst & Young Global, an independent registered public accounting firm.
The selected consolidated financial data should be read in conjunction with, and are qualified in their entirety by reference to, our audited consolidated financial statements and notes thereto included in this annual report. The selected financial
data for 2010 differ from the data we previously published for 2010, because they are presented in accordance with International Financial Reporting Standards, as issued by the International Accounting Standards Board (IFRS).

The selected financial data and our financial statements are presented in Mexican pesos. This annual report contains translations of
various peso amounts into U.S. dollars at specified rates solely for your convenience. You should not construe these translations as representations by us that the peso amounts actually represent the U.S. dollar amounts or could be converted into
U.S. dollars at the rate indicated. Unless otherwise indicated, we have translated U.S. dollar amounts from Mexican pesos at the exchange rate of P.13.9787 to U.S.$1.00, which was the applicable exchange rate reported by Banco de
México on December 31, 2011, as published in the Official Gazette of the Federation (Diario Oficial de la Federación, or Official Gazette).

Mexican issuers of securities listed on the Mexican Stock Exchange (Bolsa Mexicana de Valores, S.A.B. de C.V.,or the
Mexican Stock Exchange) are required to prepare financial statements in accordance with IFRS beginning in 2012 and were allowed to voluntarily report using IFRS before 2012. We began preparing our consolidated financial statements in
accordance with IFRS for the year ending December 31, 2011, with an IFRS adoption date of December 31, 2011 and a transition date to IFRS of January 1, 2010. The audited consolidated financial statements included in this annual report
are our first financial statements prepared in accordance with IFRS. IFRS 1 First-time Adoption of International Financial Reporting Standards has been applied in preparing these financial statements. Note 2 to our audited consolidated
financial statements contains an analysis of the valuation, presentation and disclosure effects of adopting IFRS and a reconciliation between Mexican Financial Reporting Standards (Normas Mexicanas de Información Financiera, or
Mexican FRS) and IFRS for our statement of financial position as of January 1, 2010 and December 31, 2010 and our statement of income for the year ended December 31, 2010.



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|                                                                |  |                                                                       |           |      |  |           |  | 
|--------------------------------------------------------------- |  | --------------------------------------------------------------------- | --------- | ---- |  | --------- |  | 
|                                                                |  | Year ended December 31,                                              
|                                                                |  | 2011                                                                  |           | 2010
|                                                                |  | (In millions of pesos, except pershare data, share capitaland ratios)
|Statement of Income Data:                                       |  |                                                                       |           |      |  |          
|IFRS:                                                           |  |                                                                       |           |      |  |          
|Operating revenues                                              |  |                                                                       | P.112,066 |      |  | P.113,562
|Operating costs and expenses                                    |  |                                                                       | 85,484    |      |  | 85,503   
|Operating profit                                                |  |                                                                       | 26,582    |      |  | 28,059   
|Financing cost                                                  |  |                                                                       | 4,761     |      |  | 4,754    
|Net profit                                                      |  |                                                                       | 14,603    |      |  | 15,176   
|Earnings per share attributable to equity holders of the parent |  |                                                                       | 0.808     |      |  | 0.835    
|Dividends paid per share (nominal)                              |  |                                                                       | 0.538     |      |  | 0.490    
|Weighted average number of shares outstanding (millions)        |  |                                                                       | 18,058    |      |  | 18,189   
|Ratio of Earnings to Fixed Charges(1)                           |  |                                                                       | 5.40      |      |  | 5.10     



|(1) | Earnings for this purpose consist of profit before income tax less equity interest in net income of associated companies, plus fixed charges (interest expense) during
the period. Fixed charges do not take into account exchange loss or gain attributable to our indebtedness.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|                                                      |  |                                             |          |  |      |  |          | 
|----------------------------------------------------- |  | ------------------------------------------- | -------- |  | ---- |  | -------- | 
|                                                      |  | As of December 31,                          |         
|                                                      |  | 2011                                        |          |  | 2010 | 
|                                                      |  | (In millions of pesos, exceptshare capital) |         
|Statement of Financial Position Data:                 |  |                                             |          |  |      |  |          | 
|IFRS:                                                 |  |                                             |          |  |      |  |          | 
|Property, plant and equipment, net                    |  |                                             | P.98,449 |  |      |  | P.99,421 | 
|Total assets                                          |  |                                             | 160,761  |  |      |  | 155,741  | 
|Short-term debt and current portion of long-term debt |  |                                             | 12,676   |  |      |  | 11,952   | 
|Long-term debt                                        |  |                                             | 59,117   |  |      |  | 62,569   | 
|Total equity                                          |  |                                             | 49,113   |  |      |  | 45,775   | 
|Capital stock                                         |  |                                             | 5,441    |  |      |  | 5,467    | 
|Number of outstanding shares (millions)               |  |                                             |          |  |      |  |          | 
|Series AA                                             |  |                                             | 7,840    |  |      |  | 7,840    | 
|Series A                                              |  |                                             | 366      |  |      |  | 383      | 
|Series L                                              |  |                                             | 9,824    |  |      |  | 9,935    | 
|Total                                                 |  |                                             | 18,030   |  |      |  | 18,158   | 



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EXCHANGE RATES

The following table sets forth, for the periods indicated, the high, low, average and period-end noon buying rate in New York City for
cable transfers in pesos published by the Federal Reserve Bank of New York, expressed in pesos per U.S. dollar.



|                         |  |      |       |  |     |   |        |            |  |    |            |  |  |    |       | 
|------------------------ |  | ---- | ----- |  | --- | - | ------ | ---------- |  | -- | ---------- |  |  | -- | ----- | 
|Period                   |  | High |       |  | Low |   |        | Average(1) |  |    | Period End | 
|2007                     |  | P.   | 11.27 |  |     | P | .10.67 |            |  | P. | 10.84      |  |  | P. | 10.92 | 
|2008                     |  |      | 13.94 |  |     |   | 9.92   |            |  |    | 11.21      |  |  |    | 13.83 | 
|2009                     |  |      | 15.41 |  |     |   | 12.63  |            |  |    | 13.58      |  |  |    | 13.06 | 
|2010                     |  |      | 13.19 |  |     |   | 12.16  |            |  |    | 12.67      |  |  |    | 12.38 | 
|2011                     |  |      | 14.25 |  |     |   | 11.51  |            |  |    | 12.46      |  |  |    | 13.95 | 
|                         |  |      |       | 
|2011:                    |  |      |       |  |     |   |        |            |  |    |            |  |  |    |       | 
|October                  |  |      | 13.93 |  |     |   | 13.10  |            |  |    |            |  |  |    | 13.17 | 
|November                 |  |      | 14.25 |  |     |   | 13.38  |            |  |    |            |  |  |    | 13.62 | 
|December                 |  |      | 13.99 |  |     |   | 13.49  |            |  |    |            |  |  |    | 13.95 | 
|                         |  |      |       | 
|2012:                    |  |      |       |  |     |   |        |            |  |    |            |  |  |    |       | 
|January                  |  |      | 13.75 |  |     |   | 12.93  |            |  |    |            |  |  |    | 13.04 | 
|February                 |  |      | 12.95 |  |     |   | 12.63  |            |  |    |            |  |  |    | 12.79 | 
|March                    |  |      | 12.99 |  |     |   | 12.63  |            |  |    |            |  |  |    | 12.81 | 
|April (through April 20) |  |      | 13.23 |  |     |   | 12.73  |            |  |    |            |  |  |    | 13.12 | 



Sources: The U.S. Federal Reserve Bank of New York and the U.S. Federal Reserve Board.

|(1) | Average of month-end rates, where applicable.
|--- | ---------------------------------------------

On April 20, 2012, the noon buying rate was P.13.12 to U.S.$1.00.

We will
pay any cash dividends in pesos, and exchange rate fluctuations will affect the U.S. dollar amounts received by holders of our shares who convert those cash dividends into U.S. dollars. Fluctuations in the exchange rate between the peso and the U.S.
dollar affect the U.S. dollar equivalent of the peso price of our shares on the Mexican Stock Exchange.



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RISK FACTORS

Risks Relating to Our Business Generally

Competition and shifting usage patterns are adversely affecting our revenues and profitability

Our revenues and profitability continue to be adversely affected by changes in the market and by how customers use telecommunications services. Our fixed-line network services face increasing competition
from other technologies including wireless telephone services, wireless data services, cable television providers that offer telephone service, Voice over Internet Protocol (VoIP) service and others  and the substitution of fixed-line
telephony by these technologies. This process has adversely affected our traffic volume and our results of operations and may continue to do so in the future.

In addition to competition from other technologies, we also have numerous competitors in local service and in long-distance services. Governmental authorities in Mexico continue to grant new licenses and
concessions to new market entrants, which results in increased competition.

The Mexican authorities have also adopted
regulations to permit cable television operators to provide voice-transmission services to local fixed-line telecommunications operators and data and broadband Internet access services to the Mexican public. As of December 31, 2011, 33 cable
television providers, through more than 360 concessions, have been authorized to provide local fixed-line voice-transmission service in various cities in Mexico. Regulations have also been adopted to allow other local telephone service providers to
provide paid television and audio services, but to date we have been unable to obtain authorization to do so.

The effects of
competition on our business are highly uncertain and depend on a variety of factors, including economic conditions, regulatory developments, the behavior of our customers and competitors and the effectiveness of measures we take in response to
competition. Our ability to compete successfully depends on customer service, marketing and our ability to anticipate and respond to various competitive factors affecting the telecommunications industry, including new services and technologies,
changes in consumer preferences, demographic trends, economic conditions and the commercial strategies of our competitors. If we are unable to respond to competition and compensate for declining prices by adding new customers, increasing usage and
offering new services, our revenues and profitability could decline.

Regulatory developments could have an adverse
effect on our business by limiting our ability to pursue competitive and profitable strategies

Our business is
subject to extensive government regulation, and it can be adversely affected by changes in law, regulation or regulatory policy that limit our ability to modify our business strategy. In particular, the regulatory developments described below could
adversely affect the Company.



| |  |  | Beginning in 2007, the Competition Commission (Comisión Federal de Competencia, or Cofeco) began four industry-wide
investigations into monopolistic practices. The investigations focused on four segments of the Mexican telecommunications industry: the domestic broadband Internet market, the market for interurban transport for switched long distance traffic, the
wholesale market for dedicated leasing and the fixed network interconnection market. The two investigations of the domestic broadband Internet market and the market for interurban transport for switched long distance traffic were closed due to lack
of evidence. Although evidence is still being submitted in the third investigation of the wholesale market for dedicated link leasing, Cofeco has already issued a notice of probable fault to Telmex and our subsidiary Teléfonos del
Noroeste, S.A. de C.V. or Telnor. We will object to this notice in due course. With respect to the fourth investigation regarding the fixed network interconnection market, Cofeco determined that Telmex engaged in alleged monopolistic
practices. We have filed a petition for relief (amparo) against that resolution and that petition is still pending.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Also in 2007, Cofeco initiated four examinations with respect to Telmexs market power in the following segments: the switched call market, the
transit services market, the call origination market and the
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | wholesale market for dedicated link leasing. Cofeco issued final resolutions that Telmex and Telnor have substantial market power in all four of the markets investigated. In response, Telmex and
Telnor have filed petitions for relief in all four cases. In the two cases relating to the switched call market and the transit services market, the petitions for relief are still pending. However, the courts have rejected Telnors petitions in
the remaining two cases surrounding the call origination market and the wholesale market for dedicated link leasing. Based on these final resolutions, the regulatory authorities could impose specific price requirements or other special regulations
such as additional requirements regarding disclosure of information or quality of service on us. In addition, in October 2011 the Communications Ministry (Secretaría de Comunicaciones y Transportes, or SCT) and the Federal
Telecommunications Commission (Comisión Federal de Telecomunicaciones, or Cofetel) submitted for review before the Federal Regulatory Improvement Commission (Comisión Federal de Mejora Regulatoria, or
Cofemer), a preliminary recommendation which suggested specific requirements regarding prices, quality of services, and information for the wholesale market for dedicated link leasing. In March 2012, Cofemer issued a final judgment that
incorporated that preliminary recommendation, and in April 2012 Cofetel published Cofemers final judgment in the Official Gazette. We believe that if Cofemers final judgment is deemed to apply to Telnor, it would have an adverse impact
on our revenues and results of operations.
| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | In February 2009, Cofetel published a Fundamental Technical Plan of Interconnection and Inter-Operability, or the Fundamental Technical
Plan, which requires operators with the greatest number of access points, to provide other operators with access to our network on an unbundled basis that disaggregates the prices for different service elements. We believe this may
result in pricing network access at prices below the recovery cost for our infrastructure investments and may have a negative impact on us and the Mexican telecommunications sector in general. In October 2009, Cofetel issued two resolutions
determining that we and Telnor are operators with the largest number of access points in our respective concession coverage areas. We have filed petitions for constitutional protection against the Fundamental Technical Plan and these resolutions,
which are pending. In July 2011, Telnor obtained a favorable resolution against the Fundamental Technical Plan.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | In November 2005, Cofetel issued guidelines for making changes to local service areas, including the consolidation of such local service areas. We are
challenging the legality of the underlying guidelines in the Mexican courts. If the guidelines are upheld and new resolutions to consolidate our local service areas are implemented, we believe this consolidation would have an adverse impact on our
revenues from long-distance service.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | In June 2011, Cofetel notified Telmex and Telnor of some resolutions mandating reductions to the interconnection prices that Telmex and Telnor charge
other telecommunications providers. Specifically, Cofetels resolutions reduced interconnection fees by 65% and redefined the legal nature of transport of long distance service (resale) that the Company provides other competitors establishing a
fee of P.4.53 cents per minute, a reduction of 94% from the previous price of P.75 cents per minute. Telmex and Telnor have filed petitions to challenge these resolutions. The outcome of these appeals is still pending.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Adverse global economic conditions and, in particular, the conditions of the U.S. and Mexican economies, could have a negative
impact on our operating results and financial condition

Our business is influenced by general economic conditions
worldwide and in Mexico. Deterioration in the economic environment could have an adverse effect on demand for some of our products and services. The Mexican economy is influenced by the U.S. economy, so a deterioration in economic conditions or a
slowdown in the recovery of the U.S. economy may hinder a recovery in Mexico. In difficult economic conditions our customers may seek to reduce discretionary spending. Under these conditions our business customers may delay purchasing decisions,
delay full implementation of service offerings or reduce their use of services. Adverse economic conditions may also lead to an increase in the number of our residential and business customers that are unable to pay for services. If these events
were to occur, they could have a material adverse effect on our business and results of operations.



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Our industry is subject to rapid technological changes, which could adversely affect
our ability to compete

The telecommunications industry is subject to rapid technological change. Our future success
depends, in part, on our ability to anticipate and adapt in a timely manner to technological changes. We expect that new products and technologies will emerge and that existing products and technologies will further develop. These new products and
technologies may reduce the prices we can charge for our services or they may be superior to, and render obsolete, the products and services we offer and the technologies we use. Technological changes may consequently reduce the revenues generated
by our products and services or require investment in new technology. As a result, our most significant competitors in the future may be new entrants to our markets that would not be burdened by an existing base of older equipment.

Developments in the telecommunications sector may result in substantial write-downs of the carrying value of certain of our assets

We review the value of our long-lived assets, where the circumstances require, to assess whether those carrying
values can be supported by the future cash flows expected to be derived from those assets. In addition, whenever we consider that our fixed assets, intangible assets or goodwill may be impaired due to changes in the economic, regulatory or business
environment, we consider the necessity of performing certain valuation tests, which may result in impairment charges. The recognition of impairments of long-lived tangible and intangible assets could result in a non-cash charge on our income
statement, which could adversely affect our results of operations.

We may experience system failures as a result of
natural or man-made disruptions and loss of data, which may result in reduced user traffic, decreased revenues and reputational harm

We need to continue to provide our customers with reliable service over our network. The risks to our network and infrastructure include physical damage as a result of natural disasters such as
hurricanes, earthquakes, floods and storms, technology failures, human error, terrorist attacks, hacker attacks and malicious actions (e.g., theft or misuse of customer data), and other disruptions. We have instituted many measures to reduce such
risks, including thorough monitoring of our telecommunications infrastructure, implementing redundancy in our network and installing backup technologies such as firewalls and virus scanners. Additionally, we carry casualty insurance against such
risks. However, there is no assurance that these measures will be effective against system failures under all circumstances. A system failure that impairs our ability to operate our wireline network, even for a brief period of time, may result in
increased expenses, potential legal liability, loss of existing and potential customers, reduced user traffic, decreased revenues and reputational harm which could have a material adverse effect on our operations.

We are exposed to currency and interest rate risks on our debt and we have entered into derivatives contracts to limit these risks

A substantial part of our indebtedness is denominated in U.S. dollars, and we have relatively limited assets and
revenues denominated in U.S. dollars. As of December 31, 2011, our U.S. dollar-denominated indebtedness amounted to P.32,187 million. In addition, a substantial part of our indebtedness bears interest at variable rates. As a result, we are
exposed to risks from changing currency exchange rates and interest rates.

To offset these risks, we entered into derivative
financial instruments with large financial institutions to minimize the impact of fluctuations in exchange rates and variable interest rates on our indebtedness. We have not entered into derivative financial instruments for any other purposes,
although we may do so in the future. The types of derivative financial instruments we have typically entered into in recent periods include cross-currency swaps (in which we generally pay peso amounts based on peso interest rates and receive U.S.
dollar amounts based on dollar interest rates), interest-rate swaps (in which we generally pay amounts based on fixed interest rates and receive amounts based on variable interest rates) and forward exchange contracts (in which we generally agree to
use pesos to purchase U.S. dollars at a future date).

Our derivative financial instruments do not provide complete protection
against the exchange rate or interest rate risk of our indebtedness. We may determine that the risks are acceptable or that the protection available through derivative financial instruments in the market is insufficient or too costly. These
determinations depend on many



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factors, including market conditions, the specific risks in question, and our expectations concerning future market developments. We review and change our derivatives positions regularly, and our
hedging policies change from time to time.

When the financial markets are volatile, as they have been in recent periods, our
results of operations may be substantially affected by variations in exchange rates and, to a lesser degree, interest rates. These effects include foreign exchange gain and loss on assets and liabilities denominated in U.S. dollars, fair value gain
and loss on derivative financial instruments, and changes in interest income and interest expense. These effects can be much more volatile than our operating performance or our operating cash flows.

We attempt to match the cash flows on our derivative financial instruments with the cash flows on our indebtedness. The net effects on
our reported results in any period are difficult to predict and depend on market conditions and on the specifics of our derivatives positions. For example, in 2011 the peso depreciated against the U.S. dollar by 13.1%. As a result, in 2011, we
recognized a net exchange loss on our U.S. dollar denominated debt and a net fair value gain on currency derivatives. In 2011, we also recognized lower interest expense due to a lower average level of debt.

Our derivative financial instruments are also subject to the risk that counterparties may default or seek bankruptcy protection. The
instability and uncertainty in the financial markets has made it more difficult to assess the risk of counterparties to derivatives contracts. Moreover, in light of the greater volatility in the global securities and exchange markets, there may be
fewer financial entities available with which we could continue entering into derivative financial instruments to protect against currency and interest rate risks.

Because substantially all our business is in Mexico, we are affected by adverse economic or political conditions in Mexico

Substantially all of our business operations and assets are located in Mexico. Our financial performance may be affected by general
economic, political and social conditions in Mexico. In the past, Mexico has experienced both prolonged periods of weak economic conditions and deterioration in economic conditions that have had a negative impact on the Company. Mexico has also
experienced high levels of inflation and high domestic interest rates in the past, which affected the purchasing power of consumers and businesses. Mexico started sliding into a recession in the fourth quarter of 2008, and in 2009 GDP fell by 6.5%.
In 2010, GDP rose by 5.5%, and in 2011 it rose by 3.9%. If the Mexican economy experiences a downturn or if inflation and interest rates increase significantly, our business, financial condition and results of operations could suffer material
adverse consequences because, among other things, demand for telecommunications services may decrease and consumers may find it difficult to pay for the services we offer.

Political events in Mexico could adversely affect Mexican economic policy and our operations

The next Mexican presidential and legislative elections, which will be held in July 2012, will result in a change of administration, as reelection is not permitted in Mexico. The presidential race will
likely be highly contested among a number of different parties, including the Institutional Revolutionary Party, the National Action Party and the Democratic Revolution Party, each with its own political platform. We cannot predict which party will
prevail in the elections or what changes in government policies will result from a change of administration. Such changes may adversely affect economic conditions in Mexico and our business and therefore our results of operations and financial
position.

Risks Relating to Our Controlling Shareholder and Capital Structure

The decreased liquidity of the Companys common stock could adversely affect the price of the Companys common stock

Since the completion of the tender offer launched by América Móvil, S.A.B. de C.V.
(América Móvil) in the fourth quarter of 2011, the liquidity of the Companys common stock in the U.S. and Mexican markets has markedly decreased. The low liquidity of the Companys common stock may impair the
ability of the shareholders, including



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the former holders of ADSs who surrendered their ADSs in exchange for the underlying shares, to sell their shares in the quantity and at the price that they wish.

The delisting and deregistration of Telmex shares in the United States and Mexico could result in a lack of public information
regarding Telmex

Effective January 30, 2012, the Companys ADSs ceased trading on the New York Stock
Exchange (NYSE) and the NASDAQ Capital Market (NASDAQ), and the deposit agreements governing the ADSs were terminated. Following the delisting and the termination of the deposit agreements, the Company expects to deregister
with the SEC in the course of the second quarter of 2012. As a result of the deregistration, the Company will no longer be legally required to file annual or periodic reports with the SEC. Additionally, the Company plans both to delist its shares
from the Mexican Stock Exchange and to deregister them from the National Securities Registry (Registro Nacional de Valores) during the second half of 2012. These delisting and deregistration processes in the U.S. and Mexico could result in a
lack of public information regarding Telmex, and trading in Telmexs securities might be adversely affected.

We
are controlled by one shareholder

A majority of the voting shares of the Company (97.8% as of March 29, 2012) is
owned by América Móvil, directly and indirectly through Carso Global Telecom, S.A. de C.V., or Carso Global Telecom. América Móvil has the effective power to designate a majority of the members of our Board of Directors
and to determine the outcome of other actions requiring a vote of the shareholders of the Company. América Móvil may be deemed to be controlled by Carlos Slim Helú and members of his immediate family, who, taken together, own a
majority of the common stock of América Móvil.

The protections afforded to minority shareholders in
Mexico are different from those in the United States

Our bylaws provide that any dispute between us and our
shareholders will be governed by Mexican law and that legal actions relating to the execution, interpretation or performance of the bylaws may be brought only before Mexican courts. Under Mexican law, the protections afforded to minority
shareholders are different from those in the United States. In particular, the case law concerning fiduciary duties of directors is not well developed, there is no procedure for class actions, there are different procedural requirements for bringing
shareholder lawsuits and there are different discovery rules. As a result, it may be more difficult in practice for minority shareholders of Telmex to enforce their rights against us, our directors or our controlling shareholder than it would be for
shareholders of a U.S. company.

We engage in transactions with related parties that may create the potential for
conflicts of interest

We engage in transactions with entities that, like us, are controlled, directly or indirectly,
by Carlos Slim Helú and members of his immediate family. These entities include (a) América Móvil and its subsidiaries, (b) Grupo Carso, S.A.B. de C.V., or Grupo Carso, and its subsidiaries and (c) Grupo
Financiero Inbursa, S.A.B. de C.V., or Grupo Financiero Inbursa, and its subsidiaries. Our transactions with América Móvil include interconnection between our respective networks and the completion of international traffic in each
others countries of operation, América Móvils printing and distribution of our directories and América Móvils access to our customer database and our billing and collection system in connection with its
directories business, among others. See Notes 12 and 15 to our audited consolidated financial statements. In addition, we entered into loan agreements with América Móvil. Transactions with Grupo Carso include the purchase of network
construction services and materials, and transactions with Grupo Financiero Inbursa include financial services and insurance. We also have agreements with AT&T International, Inc., or AT&T International, a shareholder of América
Móvil, that provide for the completion of calls in our respective countries of operation.

Our transactions with
related parties may create the potential for conflicts of interest.



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Holders of L Shares have limited voting rights

Our bylaws provide that holders of L Shares are not permitted to vote except on such limited matters as the transformation or merger of
Telmex or the cancellation of registration of the L Shares with the National Securities Registry, managed by the Mexican National Banking and Securities Commission (Comisión Nacional Bancaria y de Valores, or CNBV), or any
stock exchange on which they are listed. If you hold L Shares, you will not be able to vote on most matters, including the declaration of dividends that are subject to a shareholder vote in accordance with our bylaws.

You may not be entitled to preemptive rights

Under Mexican law, if we issue new shares for cash as part of a capital increase, we generally must grant our shareholders the right to purchase a sufficient number of shares to maintain their existing
ownership percentage in Telmex. Rights to purchase shares in these circumstances are known as preemptive rights. Preemptive rights do not arise upon the sale of newly issued shares in a public offering or the resale of shares of capital stock
previously repurchased by us.

We may not legally be permitted to allow holders of L Shares or A Shares in the United States
to exercise any preemptive rights in any future capital increase unless we file a registration statement with the SEC, with respect to that future issuance of shares. It is unlikely that we will file a registration statement with the SEC to allow
U.S. holders of L Shares or A Shares to participate in a preemptive rights offering. As a result, the equity interest of such holders in Telmex may be diluted proportionately.

Our bylaws restrict the ability of non-Mexican shareholders to invoke the protection of their governments with respect to their rights as shareholders

As required by Mexican law, our bylaws provide that non-Mexican shareholders shall be considered as Mexicans in respect of their
ownership interests in Telmex and shall be deemed to have agreed not to invoke the protection of their governments in certain circumstances. Under this provision, a non-Mexican shareholder is deemed to have agreed not to invoke the protection of his
own government by asking such government to interpose a diplomatic claim against the Mexican government with respect to the shareholders rights as a shareholder, but is not deemed to have waived any other rights he may have, including any
rights under the U.S. securities laws, with respect to his investment in Telmex. If you invoke such governmental protection in violation of this agreement, your shares could be forfeited to the Mexican government.

It may be difficult to enforce civil liabilities against us or our directors, officers and controlling persons

Telmex is organized under the laws of Mexico, and most of our directors, officers and controlling persons reside outside the United
States. In addition, all or a substantial portion of our assets and the assets of our directors, officers and controlling persons are located in Mexico. As a result, it may be difficult for investors to effect service of process within the United
States on such persons or to enforce judgments against them, including in any action based on civil liabilities under the U.S. federal securities laws. There is doubt as to the enforceability against such persons in Mexico, whether in original
actions or in actions to enforce judgments of U.S. courts, of liabilities based solely on the U.S. federal securities laws.



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|Item 4. | Information on the Company
|------- | --------------------------

GENERAL

Overview

We own and operate a fixed-line telecommunications system in
Mexico, where we are the only nationwide provider of fixed-line telephony services. We also provide other telecommunications and telecommunications-related services such as corporate networks, Internet access services, information network
management, telephone and computer equipment sales, and interconnection services to other carriers.

We have developed a
multi-service network in which 94.9% of our lines have the capacity to provide simultaneous transmission of voice and data through a broadband connection. Our network capability allowed us to increase the number of customers of our broadband
Internet access service by 8.1% to 8.0 million in 2011. We are extending our voice and Internet access services to remote areas in Mexico.

In 2011, we continued our efforts to grow voice and data service revenues by offering packages. In addition, we have made investments to increase our services and extend broadband coverage in the country.
We plan to continue expanding our multiple-service offerings and to take advantage of technological advances in order to provide our customers with packages that combine voice and data.

On October 3, 2006, the Convergence Agreement (Acuerdo de Convergencia), which was issued by the Federal Government through
the Communications and Transportation Ministry (Secretaría de Comunicaciones y Transportes), established the basis for the convergence of telecommunications networks. Although we have already met the Convergence Agreements
requirements, the authorities have not issued the corresponding favorable resolution that would allow us to offer TV services. This situation is delaying the advancement of telecommunications services in the country and is preventing consumers from
enjoying comprehensive media and telecommunications service offerings at competitive prices. In spite of this, we continue to make the necessary investments to keep Telmex at the forefront of technological development, with the most reliable,
efficient and state-of-the-art technology network available in the market.

Substantially all of our operations are conducted
in Mexico. Our strategy is to increase the value of our lines by enhancing our extensive and modern infrastructure and our technical capabilities to provide high-quality services to our customers across Mexico, pursuing growth in the broadband and
data businesses, introducing and promoting packaged service offerings that combine broadband with voice services at attractive prices, and maintaining our focus on customer service. Data services are a source of growth, and we are well positioned to
deliver Internet access and meet the demands of the growing market. We plan to continue selling computer equipment at our Telmex stores and increase the Internet penetration rate in Mexico.

We are a Mexican corporation headquartered in Mexico City, Mexico. Our legal name is Teléfonos de México, S.A.B. de C.V.,
and we frequently refer to ourselves commercially as Telmex. Our principal executive offices are located at Parque Vía 190, Colonia Cuauhtémoc, 06599 México, D.F., México. Our telephone number at this location is
(52) 55 5222 1774. Our website can be accessed at www.telmex.com.

In this annual report, Telmex, the
Company, we, us or our refers to Teléfonos de México, S.A.B. de C.V. and, where the context requires, its consolidated subsidiaries.



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History

We were formed in 1947 under foreign private ownership to acquire the Mexican telephone business of a wholly-owned subsidiary of the LM Ericsson group of Sweden. In 1950, we acquired the Mexican telephone
business of a wholly-owned subsidiary of the International Telephone and Telegraph Company. In 1972, the Mexican federal government acquired the majority of our capital stock. By May 1991, the Mexican federal government had divested all of its
Telmex shares through a series of sales.

In September 2000, we transferred our Mexican wireless business and our foreign
operations at the time to América Móvil in an escisión, or split-up. In December 2007, we engaged in a second escisión by transferring our Latin American and yellow pages directory businesses to a new, separate
entity, Telmex Internacional, S.A.B. de C.V., or Telmex Internacional.

During an extraordinary meeting held on April 4,
2011, our shareholders approved a corporate restructuring which contemplates the creation of a subsidiary company that will provide telecommunications and interconnection services in rural areas where our fixed telephony competitors have not
invested. The subsidiary company will be named Telmex Social, and the restructuring is subject to regulatory approval.

América Móvil has acquired an increasing percentage of our capital stock through public exchange and tender offers. In May
2010, América Móvil launched a public exchange offer to acquire the outstanding capital stock of Carso Global Telecom, the direct holder of 59.4% of Telmexs outstanding capital stock at that time. Through this offer,
América Móvil indirectly acquired 59.1% of Telmexs the outstanding capital stock. On October 11, 2011, América Móvil commenced a public tender offer for the Telmex shares that it did not already own, offering
P.10.50, in cash, for each Telmex share tendered. The tender offer expired on November 11, 2011 and enabled América Móvil to increase its ownership stake of Telmexs share capital to 92.99%. As of March 29, 2012,
América Móvil directly and indirectly owned 97.8% of Telmexs voting shares.

As a result of América
Móvils public exchange and tender offers, Telmex became a subsidiary of América Móvil. Telmexs shareholders approved plans to delist Telmexs L Share ADSs from the NYSE, Telmexs A Share ADSs from the
NASDAQ, Telmexs L Shares from the Latibex and other foreign markets during an extraordinary shareholders meeting on December 19, 2011. The shareholders also approved plans to terminate Telmexs American Depositary Receipt
(ADRs) programs. Telmexs ADSs ceased trading on the NYSE and NASDAQ and Telmexs L shares ceased trading on Latibex at the end of January 2012. Telmexs shares have continued trading on Mexican Stock Exchange. However,
during a recent extraordinary shareholders meeting held on April 25, 2012, Telmexs shareholders decided to initiate a process to delist Telmexs shares from the Mexican Stock Exchange and to deregister them from the National
Securities Registry. We expect that Telmexs shares will cease trading on the Mexican Stock Exchange during the second half of 2012.

On December 19, 2011, we announced our intention to terminate our ADR programs. In accordance with the deposit agreements, JPMorgan Chase Bank, N.A. (JPMorgan), as depositary, provided 30
days notice of termination to all holders of ADRs before the termination became effective on January 30, 2012. Holders were entitled to surrender their ADRs for cancellation and receive the underlying shares. After 30 days following the
termination of the ADR programs, JPMorgan began liquidating the shares underlying the unclaimed ADRs. JP Morgan will hold the cash proceeds from the sale of the shares uninvested for delivery to a holder against surrender of the ADR.



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Significant Subsidiaries and Affiliates

The following table sets forth our significant subsidiaries and our affiliated company accounted for using the equity method at
December 31, 2011:



|                                                    |  |                              |  |                                          |      |  |             |                                                                                                                                                                                                                                                                                                                                
|--------------------------------------------------- |  | ---------------------------- |  | ---------------------------------------- | ---- |  | ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Name of Company                                     |  | Jurisdiction ofestablishment |  | Percentageof ownershipand votinginterest |      |  | Description
|Subsidiaries                                        |  |                              |  |                                          |      |  |             |                                                                                                                                                                                                                                                                                                                                
|Integración de Servicios TMX, S.A. de C.V.          |  | Mexico                       |  |                                          | 100% |  |             | Intermediate holding company.                                                                                                                                                                                                                                                                                                  
|Alquiladora de Casas, S.A. de C.V.                  |  | Mexico                       |  |                                          | 100% |  |             | Real estate company owning our facilities.                                                                                                                                                                                                                                                                                     
|Compañía de Teléfonos y Bienes Raíces, S.A. de C.V. |  | Mexico                       |  |                                          | 100% |  |             | Real estate company owning our facilities.                                                                                                                                                                                                                                                                                     
|Consorcio Red Uno, S.A. de C.V.                     |  | Mexico                       |  |                                          | 100% |  |             | Supplier of telecommunications network integration services and information systems.                                                                                                                                                                                                                                           
|Teléfonos del Noroeste, S.A. de C.V.                |  | Mexico                       |  |                                          | 100% |  |             | Fixed-line public network concessionaire for the state of Baja California Norte and the San Luis Rio Colorado region of the state of Sonora.                                                                                                                                                                                   
|Uninet, S.A. de C.V.                                |  | Mexico                       |  |                                          | 100% |  |             | Provider of corporate networks and Internet access services to Telmex and corporate customers.                                                                                                                                                                                                                                 
|Telmex USA, L.L.C.                                  |  | Delaware(United States)      |  |                                          | 100% |  |             | Authorized long-distance service re-seller and provider of payment collection services for lines in Mexico (installation and monthly rental), and authorized by the United States
Federal Communications Commission to provide facility-based long-distance services, data transmission and cross-border data transit services.
|Affiliated company                                  |  |                              |  |                                          |      |  |             |                                                                                                                                                                                                                                                                                                                                
|Grupo Telvista, S.A. de C.V.                        |  | Mexico                       |  |                                          | 45%  |  |             | Provider of telemarketing services in the United States and Mexico.                                                                                                                                                                                                                                                            



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OPERATIONS

Of our revenues in 2011, 34.4% was attributable to local services, 15.9% to long-distance services, 10.9% to interconnection and 32.5% to
data services. Other services, including primarily sales of computers and telephones at Telmex stores and billing and collection services to third parties, accounted for 6.3% of revenues.

Overview

The following table gives selected data on the size and usage of
our network:



|                                                                    |  |              |        |  |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|------------------------------------------------------------------- |  | ------------ | ------ |  | ---- |  | ------ | ---- |  |  | ------ |  |  | ---- | ------ |  |  |  | ------ | 
|                                                                    |  | December 31, |       
|                                                                    |  | 2011         |        |  | 2010 |  |        | 2009 |  |  | 2008   |  |  | 2007 |       
|Internet access accounts (thousands)                                |  |              | 8,017  |  |      |  | 7,449  |      |  |  | 6,651  |  |  |      | 5,217  |  |  |  | 3,320  | 
|Billed lines (thousands)(1)                                         |  |              | 14,814 |  |      |  | 15,591 |      |  |  | 15,882 |  |  |      | 17,589 |  |  |  | 17,800 | 
|Total local calls (millions)                                        |  |              | 17,732 |  |      |  | 19,261 |      |  |  | 20,835 |  |  |      | 22,583 |  |  |  | 24,892 | 
|Domestic long-distance call minutes for the year (millions)         |  |              | 17,407 |  |      |  | 18,292 |      |  |  | 19,837 |  |  |      | 19,687 |  |  |  | 18,275 | 
|International long-distance call minutes for the year (millions)(2) |  |              | 11,186 |  |      |  | 8,887  |      |  |  | 7,526  |  |  |      | 8,733  |  |  |  | 9,531  | 



|(1) | Until 2008, it included lines that were two or more months behind on bill payments.
|--- | -----------------------------------------------------------------------------------

|(2) | Includes incoming and outgoing traffic.
|--- | ---------------------------------------

Local Service

We are a
nationwide provider of local telephone service in Mexico. We provide local telephone service in 23,205 communities throughout Mexico. Of all lines in service, 31.8% are in the Mexico City, Monterrey and Guadalajara metropolitan areas. We provide
service in 21,744 communities with fewer than five thousand inhabitants, exceeding our obligations to offer services in rural areas.

Local traffic in 2011 decreased by 7.9% compared to 2010, for a total of 17,732 million calls. The decrease in traffic in 2011 was attributable primarily to a lower number of billed lines as a result
of the competition from cellular operators, fixed-line local service providers and cable television providers, the change in the consumption profile of our customers, as well as the migration of switched traffic to corporate networks, and other
alternative service offerings. We expect that further market penetration by alternative service offerings and increasing competition could continue to adversely affect our service traffic.

Our charges for fixed-line local telephone service include (a) installation charges, (b) monthly line rental charges,
(c) monthly measured service charges, (d) digital services and (e) charges for other services, such as the transfer of a line to another address and reconnection. Residential customers pay a fixed charge per local call in excess of a
monthly allowance of 100 local calls, and commercial customers pay for every local call at the same fixed price per call. The concession we hold to operate a public network for basic telephone services (the Concession) allows but does
not require us to base our charges on the duration of each call, with a monthly allowance of free calls or call minutes for residential customers. We currently do not charge by duration of invoiced calls in any region, except in the case of prepaid
services.

In order to promote local service among our customers, we have introduced packages that include, among others,
unlimited local and domestic long-distance calls. We also have introduced various telecommunications services packages. Some packages consist of a certain number of local calls and/or minutes for domestic long-distance service and others consist of
a certain number of minutes for fixed lines to cellular calling. In 2011, for the eleventh year, we did not increase prices for local telephone services. We have had lower prices on an inflation-adjusted basis every year since 2001.



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Domestic Long-distance Service

Our nationwide domestic long-distance transmission network consists of 31.8 thousand kilometers of optical fiber connecting
Mexicos major cities, and includes secondary branches and additional transmission rings throughout Mexico designed to avoid network congestion.

Domestic long-distance traffic decreased by 4.8% in 2011 and 7.8% in 2010, reaching a total of 17,407 and 18,292 million minutes, respectively. The decrease in domestic long-distance traffic in 2011
was primarily due to the decrease in termination of cellular operators and lower traffic from our customers.

We expect that
further market penetration by alternative service offerings and increasing competition could adversely affect domestic long-distance service growth.

Our prices for domestic long-distance service are based on call duration and type of service (direct-dial or operator-assisted) once customers exceed the number of minutes included in their service
packages.

We offer a variety of domestic long-distance discount plans that reduce the effective prices paid by our customers
based on their total monthly consumption and whether calls were made at peak or off-peak times. We also offer packages that include a certain number of minutes at no extra cost or include unlimited minutes for residential and small and medium
enterprise customers.

In 2011 we did not increase our prices for domestic long-distance calls. This continues our trend of
offering lower prices on an inflation-adjusted basis since March 1999.

International Long-distance Service

We are a nationwide provider of international long-distance telecommunications services in Mexico. International long-distance traffic
with the United States, Canada, Central America and other countries is carried by a combination of fiber optic network, microwave transmission, satellite systems and submarine cable.

In 2011, incoming international long-distance traffic increased by 28.1%, for a total of 9,586 million minutes, and outgoing
international long-distance traffic increased by 13.9% for a total of 1,599 million minutes, mainly due to increased traffic from cellular operators.

We believe international long-distance traffic has been affected by, among other things, the increased use of VoIP technology, which transmits ordinary telephone calls over the Internet and traffic
generated by cellular phones.

Charges for international long-distance calls are based on call duration, type of service
(direct-dial or operator-assisted) and the destination of the call after customers exceed the number of minutes included in their plan. Customers can choose from a variety of discount price plans.

In 2011, we did not increase our prices for international long-distance calls, continuing our trend of offering lower prices on an
inflation-adjusted basis since March 1999.

Bilateral agreements with foreign carriers govern the prices we pay to foreign
carriers for terminating international calls from Mexico and the prices foreign carriers pay us for completing international calls to Mexico. The prices of payment under such agreements are negotiated with each foreign carrier. Settlements among
carriers are made on a net basis. Settlement amounts payable to us in respect of calls from the United States to Mexico generally exceed amounts payable by us in respect of calls from Mexico to the United States. As a result, we receive net
settlement payments from U.S. carriers. We make net settlement payments to other international carriers taken as a whole.

The
international settlement prices that U.S. carriers pay to foreign carriers have been subject to intense downward pressure due to increasing competition.



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Interconnection

We provide interconnection services pursuant to which (a) long-distance, local and cellular phone carriers operating in Mexico
establish points of interconnection between their networks and our network and (b) we carry calls between the points of interconnection and our customers. When a customer of another carrier calls a local service customer of ours, we complete
the call by carrying the call from the point of interconnection to the particular customer, and when a local service customer of ours who has preselected a competing long-distance carrier makes a long-distance call, we carry the call from the
customer to the point of interconnection with that other long-distance carriers network. Excluding the calling party pays service, we have only one price for interconnecting all categories of carriers and all types of calls. As a
result of Mexicos bill-and-keep system, under which local carriers and cable television providers do not pay interconnection fees to other local carriers, we do not receive an interconnection fee from these calls.

In 2011, interconnection traffic increased 0.3%, for a total of 43,152 million minutes. In 2010, interconnection traffic decreased
by 0.8%, for a total of 43,008 million minutes. The slight growth in 2011 was the result of an increase in interconnection minutes from cellular to fixed lines, partly offset by a decrease in traffic related to calling party pays
services.

Data services

Our data service business is comprised of corporate network services, Internet access services and other value added services for corporate customers.

Corporate networks consist of the transmission of voice, video and data between two or more end points using private circuits. Our
principal product offerings for corporate networks are Ladalinks (Ladaenlaces) and Multi-service Virtual Private Networks, which allow us to provide different levels of service for voice, data and other applications. We also provide
specialized assistance and technical support for these applications.

We provide network outsourcing services that include
maintenance, support and integration of communication networks and information systems.

Internet access services connect both
business and residential customers to the Internet through either a broadband connection or a dial-up connection. In 2011, the number of our Internet customers increased to approximately 8.0 million at year-end, an increase of 7.6% compared
with 2010.

Our broadband service, infinitum, allows our customers to use our high-capacity connectivity services. Infinitum
operates over Asymmetric Digital Subscriber Line, or ADSL, technology. In 2011, our sales force continued to promote telecommunications packages and this strategy enabled us to increase our ADSL customer base by approximately 593 thousand
accounts. At year-end 2011, we had 8.0 million ADSL customer accounts, an increase of 8.1% over 2010.

In order to
provide our customers with a superior Internet experience and maintain our position as a telecommunications technology leader, we worked to increase data speeds for our infinitum customers without increasing our prices. As a value added for our
customers we offer WiFi Móvil in infinitum, our high-speed wireless service for residential and business customers. At December 31, 2011, we maintained 4,182 public hot spots in 348 cities in Mexico, provided coverage
in airports, universities, bus stations, restaurants, shopping centers among others. We have agreements to provide our customers with Internet access at over 200,000 sites worldwide.

During 2011, packages continued to gain popularity among our residential customers due to the cost-savings and simplified billing that
such packages provide. We are working to make these packages even more attractive by incorporating more benefits such as a price of P.1.00 per minute for calls to any country in the Paquete Acerques and in Todo
México Sin Límites packages and unlimited minutes to the United States in the Todo México Sin Límites package, among others.



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Other Products and Services

We provide various telecommunications and telecommunications-related products and services that include sales of computers, telecommunications equipment and accessories, public phones and billing and
collection services to third parties. One of the main obstacles affecting the development of broadband in Mexico is the lack of personal computer penetration in Mexican homes and the low per capita income of a considerable part of the population. In
order to ameliorate the situation, we sell home computers with financing and we have sold 3.2 million computers since 1999.

In November 2008, we entered into several agreements with Dish México (Dish) and its affiliates, which operate a direct-to-home (DTH) pay television system in Mexico. We are currently
providing billing and collection services, among other services, to Dish and its affiliates. We may decide to invest directly in a joint venture with Dish in the future and such an investment would be subject to regulatory authorizations.

Telmex Stores

We have a network of 389 Telmex stores (Tiendas Telmex) that offer our products and services throughout Mexico. In addition to their function as customer service centers, the Telmex stores offer a
wide range of computer and telecommunications equipment and accessories, which may be purchased outright or through installment payment plans. The network of Telmex stores serves not only as a focal point for interaction with our current and
prospective customers but also as a growing source of revenue. Our computer sales strategy, including store financings of up to 48 months, has substantially facilitated the increase in broadband coverage in Mexico.

Billing and Customer Service

Our invoices detail the number and destination of local and long-distance calls made, and charges for other services. On our website (www.telmex.com) our customers can view their statements in detail:
SI@NA for corporate customers and Mi Telmex for residential and commercial customers. On our website we provide information about our services, corporate information and access to online transactions such as order services
and the payment of invoices.

We provide support to our customers through our customer service centers, call centers and our
website. We service our corporate clients through our integrated service plans that can be customized to meet the specific needs of individual clients. We assign specialized staff to service large corporate clients.

We also offer billing and collection services to other companies. We currently provide billing and collection services to companies such
as Medicalhome, Socio Águila, Teletón, Telecomunicaciones de México and Dish.

Public Telephony and Prepaid Phone Cards

We have several programs to meet the need for different kinds of public telephone service in different areas. We had more than 594 thousand fixed-line public telephones in operation at
December 31, 2011. In the increasingly competitive market to provide telecommunications services, independent operators have installed public telephones for which we provide access. There were more than 95 thousand independently operated
public telephones at December 31, 2011, an increase of 4.1% compared with 2010. In 2011, our network serviced a total of 689 thousand fixed-line public telephones.

In 2011, we sold 28.9 million prepaid cards under the brand name Ladatel for use in public phones, a decrease of 33.8% from 2010, and 15.8 million prepaid cards under the
brand name Multifón for use in public and residential telephones, a decrease of 18.8% from 2010.

Operations in
the United States

Our U.S. subsidiary, Telmex USA, L.L.C., or Telmex USA, holds a facilities-based authorization from the
U.S. Federal Communications Commission permitting Telmex USA to install and operate telecommunications facilities in the United States. Telmex USA offers data transmission and cross-border data transit services. Telmex USA is also



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authorized to resell long-distance services and to collect installation and monthly rent payments for telephone lines in Mexico.

Network

Through our network we offer many advanced services that include
voice, data and video transmission, Internet access and integrated solutions to all types of customers. These services encompass public, rural and residential telephony; specific solutions for small and medium sized commercial customers; and
integrated offers for large domestic and international corporations.

Our local and long-distance fiber-optic data and voice
networks consist of 135,876 kilometers of fiber-optic cables, connecting the main and major cities in Mexico as well as connecting Mexico via submarine cables with 30 other countries.

Our network included 14.8 million local fixed billed lines at the end of 2011. Our networks, consist of four main layers:
(i) connectivity layer, consisting of access network, which includes access to end customers via copper, fiber-optic or wireless transmission, the optic transport network, which transports information between network sites; (ii) processing
and control layer, which controls communications and services including telephone voice switching; (iii) applications layer, allowing to provide next generation multimedia services under the information technologies (IT) development; and
(iv) management layer, which allows us to assure the performance of our networks and services in real time and centralize control of operations.

Connectivity Layer-Access Network

Our external copper network is
capable of supporting conventional telephone services in some locations, as well as modern broadband services using different digital technologies such as Asymmetric Digital Subscriber Line 2 plus, or ADSL2+, and Very High Speed Digital Subscriber
Line version 2, or VDSL 2. ADSL2+ allows us to offer Internet connectivity speeds of close to 20 Mbps and VDSL 2 enables speeds of 20 Mbps or higher.

We provide our corporate customers with access to our fiber-optic network through our reliable service packages. We leverage conventional connections and Ethernet connectivity to offer corporate customers
dedicated services with speeds ranging from 64 kbps to 1 Gbps. Additionally, we are upgrading services for N x 1 Gbps and 10 Gbps.

We are also working to provide our residential customers with greater access to our fiber-optic network. Telmex continues to install fiber-optic lines using Fiber to the Node and Fiber
to the Home models. This is part of our general strategy of increasing the bandwidth available for all our customers by extending our fiber-optic lines and reducing the length of our external copper network.

We also have wireless access platforms that are supported by radio direct access and multiple access systems, WLL (Wireless Local Loop)
systems, and other technologies that provide voice, data and Internet access services to customers who are geographically remote from our fiber-optic infrastructure.

Connectivity Layer-Optical Transport Data Network

In 2011 we
continued with our national installation of transport equipment with Carrier Ethernet technology for our data network. This deployment provides us with a solution of native and highly efficient transport services based on Internet protocol (IP) and
Ethernet technology, thus consolidating a convergent platform, All IP, to support the growth of multimedia services. This network is the best and most efficient extension of IP/MPLS network from the core of our infrastructure to access
premises.

In order to increase our transmission capacities, we also use Dense Wavelength Division Multiplexing, or DWDM,
technology which divides the optical fiber signals into multiple wavelengths. Using this technology, the network is designed to manage all demand on the growing broadband market. Telmexs DWDM network is operating with capacity systems of 520
Gbps and several routes reaching 1.29 Tbps.



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Our data transport network is fully redundant and is supported by optic rings, which use
Synchronous Digital Hierarchy (SDH) equipment and Next Generation SDH technologies that allow the network to be restored within 50 milliseconds, thereby minimizing the risk of signal interruption in the event of a system failure. The Next Generation
SDH technology also permits a scalable increase in the required bandwidth.

We operate optical cross-connect technology
equipment, which enables the interconnection of signals transported optically, allowing us to connect the signals transmitted by fiber more effectively in the network.

Connectivity Layer-Convergent Data Network

All of our IP-based data
services are offered through a multi-service IP/MPLS platform. IP/MPLS is a high-capacity, high-performance network platform based on service convergence and is designed to work over the optical transport network. It has a feature that allows us to
expand our backbone network with routes of up to 10 Gbps while maintaining redundant routes and offer national coverage of our IP-based data services. The technology used in our network provides the necessary flexibility to offer speeds of access
from 64 Kbps to 155 Mbps for virtual private multiservice network or IP VPNs.

The technological capacity of our IP
network permits the differentiation of distinct classes of service through which integrated data and video services can be provided. This feature allows us to efficiently offer a wide variety of services such as Internet access, corporate networks,
wireless Internet access and multimedia applications.

Processing and Control Layer

The processing for voice services is controlled by digital exchanges. The voice processing network has been fully digital since 2001 and
has enabled high quality service, service diversity as well as improved Interconnection capacities for all market operators.

Voice processing in our network is controlled by digital local and long-distance telephone exchanges which employ high levels of
redundancy and load sharing to enhance network availability and service quality. We also use an advanced intelligent network platform, which currently is operating 55 applications and value-added services with high levels of reliability.
Furthermore, this platform is capable of implementing new services and applications throughout our network in a short amount of time.

Application Layer

The application layer is a new platform based on
ICT (Information and Communication Technologies) and computing open standards that allow us to implement new services and applications more efficiently. The architecture of this platform is modular, allowing for the integration of independently
developed services with open and standard interface connections, which reduces the time to market for next generation multimedia services.

Telmex reached out to the corporate market with enhanced Information Technology (IT) services that integrate telecommunications and information technologies, thereby allowing us to incorporate new service
capabilities such as software development, process outsourcing, security, and cloud computing services, among others.

Management Layer

We continuously control and monitor our data and voice networks performance and traffic levels while managing the routing of traffic and other network functions through a centralized network
management platform that operates 24 hours a day, 365 days a year. We have developed a new operations management model which supports the telecommunications operations all over the country.

This model is based on the centralized management scheme in which all equipment, networks and services are monitored, managed, configured
and controlled by specialized operation centers with defined tasks and objectives in order to maintain the efficiency of Telmexs operations.



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Competition

We face competition from a large number of market participants using a variety of technologies to address different elements of the demand for telecommunications services. Currently our principal
competitors include: holders of licenses to provide fixed-line, local, and long distance service, of which Axtel, S.A.B. de C.V. and Maxcom Telecomunicaciones, S.A.B. de C.V. are the largest; cable television operators with licenses to provide
telephone and internet services, led by Megacable Holdings, S.A.B. de C.V., Empresas Cablevisión, S.A.B. de C.V. and Cablemás, S.A. de C.V.; and the cellular telecommunications operators, of which Radiomóvil Dipsa, S.A. de C.V.
(generally known as Telcel) and Telefónica Móviles de Mexico S.A. de C.V. (generally known as Movistar) are the largest.

The Mexican telecommunications market is increasingly complex, and the barriers between formerly distinct markets are eroding as a result of regulatory and technological change. While we have a strong
share in certain segments of the local fixed-line, such as switched local service, long-distance service or broadband data connections, our overall share of the telecommunications market is difficult to evaluate. For example, according to Select
Estrategia, S.C., a leading market research firm in Mexico, at year-end 2011, we had approximately 14.8 million billed lines in service in our network, while cellular phone carriers in Mexico had an estimated combined total of 98.0 million
cellular lines in service.

We anticipate continued intense competition as cellular phone carriers promote
cellular-to-cellular calls and text messages as less expensive alternatives to fixed-to-cellular calls. We also face increasing competition in international and domestic long-distance and local services from VoIP, a technology that transmits
ordinary telephone calls over the Internet. More recently, we have begun to face competition in voice services and, to a more significant extent, Internet access services from cable television operators.



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REGULATION

Our business is subject to comprehensive regulation and oversight by the Communications Ministry and Cofetel. The Communications
Ministry is part of the executive branch of the Mexican federal government, and Cofetel is an agency of the Communications Ministry. Regulation and oversight are governed by the Law of General Means of Communication (Ley de Vías Generales
de Comunicación, or the General Communications Law), the Federal Telecommunications Law (Ley Federal de Telecomunicaciones) and the related Telecommunications Regulations adopted by the Communications Ministry and Cofetel, the
Concession and other concessions and licenses granted by the Communications Ministry. We are also subject to the regulations and oversight by the Agency for Consumer Protection (Procuraduría Federal del Consumidor) and the Competition
Commission.

Set forth below is a summary of certain provisions of the General Communications Law, the Federal
Telecommunications Law, the Telecommunications Regulations and our concessions.

General

The General Communications Law, the Federal Telecommunications Law and the Telecommunications Regulations provide the general legal
framework for the regulation of telecommunications services in Mexico. The Federal Telecommunications Law replaced most of the provisions of the General Communications Law relating to telephone communications, but those provisions of the General
Communications Law not specifically addressed in the Federal Telecommunications Law remain in effect. The Telecommunications Regulations implement particular provisions of the Federal Telecommunications Law, and regulations implementing other
provisions of the law are pending. The objectives of the Federal Telecommunications Law are to promote the efficient development of the telecommunications industry, to encourage fair competition in the provision of quality, affordable services and
to assure satisfactory breadth of coverage of the Mexican population.

Regulatory Oversight

The Communications Ministry is the Mexican federal government agency principally responsible for regulating telecommunications services.
Approval from the Communications Ministry is required for any change in our bylaws. It also has broad powers to monitor our compliance with the Concession, and it may revoke our Concession or temporarily seize or expropriate our assets. The
Communications Ministry may require us to supply it with such technical, administrative and financial information as it may request.

Cofetel was established by the Federal Telecommunications Law as a separate administrative body that enjoys operative, budgetary and management independence from the Communications Ministry. Cofetel is
charged with the regulation, promotion and supervision of the telecommunications and radio broadcasting markets in Mexico, with full autonomy to issue its own resolutions. Cofetel is headed by five commissioners appointed by the President of Mexico,
one of whom serves as chairman. Many of the faculties and obligations of the Communications Ministry under the Federal Telecommunications Law and the Telecommunications Regulations were transferred to Cofetel. We regularly provide reports to
Cofetel on our operations, financial performance and other matters. We are also required to publish our annual network expansion program and must inform Cofetel of the progress of our expansion program on an annual basis.

Mexican law gives certain rights to the Mexican government in its relations with concessionaires and provides that when the Concession
expires we may not sell or transfer any of our assets unless we give the Mexican government a right of first refusal. If the Mexican government declines to exercise its right, our unions also have a right of first refusal. In addition, Mexican law
permits the Mexican government to expropriate our assets in certain circumstances.

Concessions

Under the Federal Telecommunications Law and the Telecommunications Regulations, a provider of public telecommunications services must
operate under a concession granted by the Communications Ministry. Such a concession may not be transferred or assigned without the approval of the Communications Ministry. A concession



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to provide public fixed-line local and long-distance services generally has a term of up to 30 years and may be extended for additional 30-year terms. Our Concession was granted in 1976 and
amended in August 1990. Currently set to expire in 2026, our Concession may be extended for an additional 15-year term. Our subsidiary Telnor holds a separate concession in a region located in two states in northwestern Mexico, which will also
expire in 2026 and may be extended for an additional 15-year term thereafter. The material terms of the Telnor concession are essentially the same as the terms of the Concession.

Operators of private networks that do not use electro-magnetic frequencies are not required to obtain a concession to provide private
telecommunications services but are required to obtain approval from the Communications Ministry.

In addition to the
Concession, we currently hold concessions for the use of frequencies to provide wireless local access and point-to-point and point-to-multipoint transmission, which we obtained from Cofetel through a competitive bidding process. These concessions
are granted for a term of up to 20 years and may be extended for additional 20-year terms.

Termination of the Concession

The Concession provides that it will remain in force until 2026 and that we may renew it for an additional 15-year term, subject to
additional requirements that the Communications Ministry may impose. Thereafter, it may be renewed for successive 30-year terms as provided under the Federal Telecommunications Law.

The General Communications Law provides that upon the expiration of the Concession the Mexican government is entitled to purchase our
telecommunications assets at a price determined on the basis of an appraisal by a public official, and the Telecommunications Regulations provide that upon expiration of the Concession the Mexican government has a right of first refusal to acquire
our telecommunications assets. However, the General Communications Law also provides that, in certain cases, upon expiration of the Concession our telecommunications assets will revert to the Mexican government free of charge. There is substantial
doubt as to how these provisions of the General Communications Law and the Telecommunications Regulations would be applied and, accordingly, there can be no assurance that upon expiration of the Concession our telecommunications assets would not
revert to the Mexican government free of charge.

The General Communications Law, the Federal Telecommunications Law, and the
Concession include various provisions under which the Concession may be terminated before its scheduled expiration date. Under the General Communications Law and the Federal Telecommunications Law, the Communications Ministry may cause early
termination of the Concession in certain cases, including:



| |  |  | Failure to comply with the terms of the Concession;
| | - |  | ---------------------------------------------------



| |  |  | Interruption of all or a material part of the services provided by us;
| | - |  | ----------------------------------------------------------------------



| |  |  | Transfer or assignment without the Communications Ministry approval of the Concession, the rights provided under the Concession or any asset used to
provide telephone service;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Violation of the prohibition against ownership of our shares by foreign states;
| | - |  | -------------------------------------------------------------------------------



| |  |  | Violation of the prohibition against any material modification of the nature of our services without prior Communications Ministry approval; or
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Breach of certain other obligations under the General Communications Law and the Federal Telecommunications Law.
| | - |  | ----------------------------------------------------------------------------------------------------------------

In addition, the Concession provides for early termination by the Communications Ministry following administrative proceedings in the
event of:



| |  |  | Material and continuing violation of any of the conditions set forth in the Concession;
| | - |  | ---------------------------------------------------------------------------------------



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| |  |  | Material failure to meet any of the service expansion requirements under the Concession;
| | - |  | ----------------------------------------------------------------------------------------



| |  |  | Material failure to meet any of the requirements under the Concession for improvement in the quality of service;
| | - |  | ----------------------------------------------------------------------------------------------------------------



| |  |  | Engagement in any telecommunications business not authorized under the Concession and requiring prior approval of the Communications Ministry;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Following notice and a cure period, failure without just cause to allow other concessionaires to interconnect their telephone networks to our telephone
network; or
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Our bankruptcy.
| | - |  | ---------------

Under the Federal Telecommunications Law, our concessions could be terminated if: (a) the term of any concession expires; (b) we resign our rights under any concession; (c) the Mexican
government through the Communications Ministry expropriates any of the concessions; (d) we are liquidated or become bankrupt; or (e) the Communications Ministry revokes any of the concessions.

The General Communications Law provides that in the event of early termination of the Concession for certain specified causes, including
violation of the prohibition on ownership of our shares by foreign states, we would forfeit all of our telecommunications assets to the Mexican government. In the event of early termination of the Concession for any other causes, the General
Communications Law provides that a portion of our telecommunications assets would revert to the Mexican government free of charge, and that we may be required to dismantle the remaining portion. There is substantial doubt as to whether the
provisions of the Concession and the Telecommunications Regulations regarding the consequences of expiration of the Concession would apply to mitigate the provisions of the General Communications Law in the event of early termination.

Our assets and rights under the concessions may also be temporarily seized by the Communications Ministry.

Competition

The
Telecommunications Regulations and the Concession contain various provisions designed to foster competition in the provision of telecommunications services. In general, the Communications Ministry is authorized to grant concessions to other parties
for the provision of any of the services provided by us under the Concession. In December 2011 the SCT had authorized 42 competitors to provide long distance services and there were 18 competing long-distance carriers operating in Mexico (including
Telmex and Telnor), all of which also have concessions for international long-distance services.

As of December 31,
2011, there were 35 local fixed-line licensees and permissions (including Telmex and Telnor). Fixed local competitors are operating in 173 local service areas covering the main cities of the country, like Mexico City, Guadalajara, Monterrey and
Puebla. See OperationsCompetitionabove. Concessionaires are not required to operate certain private local telecommunications networks or to provide value-added services, although other authorizations may be required.

With respect to international long-distance services, Cofetels rules cover matters such as the termination of international calls
and mechanisms for routing calls into and out of Mexico. Currently, international traffic must be carried by Mexican concessionaires and through authorized international gateways consistent with Cofetels international long-distance rules.

The Communications Ministry has expanded the ability of cable television operators to compete with us. Since 2003, it has
permitted them to provide bidirectional transmission of data. Since 2004, it has permitted them to provide signal-transmission services to local fixed-line operators and data and broadband Internet access services to the public. Since 2006, it has
permitted some of them to provide fixed-line local telephone services. SeeRegulationTelevision and Audio Services below.



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We also experience competition from unregulated sources. For example, some operators offer
VoIP services, although the application of current regulations to these services is unclear.

The competitive
environment in the Mexican telecommunications market has been the subject of controversy and of attention from Mexican regulators and from abroad. In the past, the Competition Commission determined that we were a dominant provider of certain
telecommunications services and Cofetel adopted specific regulations applicable to us as a dominant carrier. These resolutions and regulations were later held invalid and were nullified by Mexican federal courts. The Competition Commission also has
repeatedly ruled that we have engaged in certain monopolistic practices. Most, but not all, of these past Competition Commission rulings also have been declared null and void by federal courts or have been withdrawn by the Competition Commission.
The Competition Commission is currently conducting investigations relating to monopolistic practices and recently issued final resolutions concluding that we and Telnor have substantial power in certain markets. See Regulatory Initiatives
Relating to Competition below andItem 8. Financial InformationLegal Proceedings.

Regulatory Initiatives
Relating to Competition

The Federal Telecommunications Law provides that, if a company is determined to have substantial
market power in a relevant market, the Communications Ministry may adopt specific regulations on prices, quality of service and information to be provided by the dominant company. In addition, if a company is determined by the Competition Commission
to have engaged in monopolistic practices, it may be subject to prohibitions or monetary sanctions.

Beginning in 2007, the
Cofeco began four industry-wide investigations into monopolistic practices. The investigations focused on four segments of the Mexican telecommunications industry: the domestic broadband Internet market, the market interurban transport for switched
long distance traffic, the wholesale market for dedicated leasing and the fixed network interconnection market. The two investigations of the domestic broadband Internet market and the market for interurban transport for switched long distance
traffic were closed due to lack of evidence. Although evidence is still being submitted in the third investigation of the wholesale market for dedicated link leasing, Cofeco has already issued a notice of probable fault to Telmex and our subsidiary
Telnor. We will object to this notice in due course. With respect to the fourth investigation of the fixed network interconnection market, Cofeco determined that Telmex engaged in alleged monopolistic practices. We have filed a petition for relief
against that resolution and that petition is still pending.

Also in 2007, the Cofeco initiated four examinations with respect
to Telmexs market power in the following segments: the switched call market, transit services market, the call origination market and the wholesale market for dedicated link leasing. Cofeco issued final resolutions that Telmex and Telnor have
substantial market power in all four of the markets investigated. In response, Telmex and Telnor have filed petitions for relief in all four cases. In the two cases relating to the switched call market and transit services market, the petitions for
relief are still pending. However, the courts have rejected Telnors petitions in the remaining two cases surrounding the call origination market and the wholesale market for dedicated link leasing. Based on these final resolutions, the
regulatory authorities could impose specific price requirements or other special regulations such as additional requirements regarding disclosure of information or quality of service on us. In addition, in October 2011, the SCT and Cofetel submitted
for review before Cofemer, a preliminary recommendation which suggested specific requirements regarding prices, quality of services, and information for the wholesale market for dedicated link leasing. In March 2012, Cofemer issued a final judgment
that incorporated that preliminary recommendation, and in April 2012 Cofetel published Cofemers final judgment in the Official Gazette. We believe that if Cofemers final judgment is deemed to apply to Telnor, it would have an adverse
impact on our revenues and results of operations. We will therefore consider all appropriate legal challenges to the judgments applicability to Telnor.

Television and Audio Services

The regulatory framework governing the
provision of television and audio services by telecommunications companies and of telecommunications services by television and audio providers has been the subject of an ongoing amendment process since 2003. The outcome of this process and the
resulting changes in the regulatory framework may affect our business.



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In 2003, the Communications Ministry expanded the concessions granted to cable television
operators to permit them to provide bidirectional transmission of data. In 2004, the Communications Ministry began to permit cable operators to provide signal-transmission services to local fixed-line operators and data and broadband Internet access
services to the Mexican public.

In April 2006, the Mexican Congress approved an amendment to the Federal
Telecommunications Law and the Federal Radio and Television Law. The amendment allows radio and television broadcasters to provide telecommunications services after complying with certain conditions and makes Cofetel responsible for overseeing all
telecommunications services, including those related to broadcasting. In June 2007, the Mexican Supreme Court (Suprema Corte de Justicia de la Nación) declared various provisions of the law invalid, including those that
would allow radio and television broadcasters to provide telecommunications services without seeking more than a simple authorization and to use their frequencies free of charge, and concluded that such broadcasters would be required to participate
in public bidding processes in order to obtain frequencies for use in providing such services.

In October 2006,
the Communications Ministry adopted regulations that permit paid television and audio concessionaires to provide fixed-line local telephone services and local telephone service providers like us to provide paid television and audio services. These
regulations facilitate the convergence of voice, data and video services into one integrated product that could be delivered over a broadband network. The regulations allow concessionaires to provide these new services, subject to certain regulatory
steps to be taken by Cofetel. As of December 31, 2011, 33 cable television providers, through more than 360 concessions, provide or have been authorized to provide local fixed-line voice-transmission and one fixed-line local service provider
offers paid television services. In the case of Telmex, additional conditions have been imposed, including the implementation of network interoperability, telephone number portability and verification of compliance with existing concession
obligations, as well as the adoption of an interconnection framework. Telephone number portability was initiated in July 2008, allowing customers to change their telephone provider and keep their telephone number. We think that we have met all the
requirements necessary to be able to provide pay television services; however, to date we have been unable to obtain authorization.

We cannot predict the outcome and the effect of the regulatory processes described above, but they could result in the entry of new competitors to our business and could have an adverse effect on our
competitive position and results of operations.

Consolidation of Local Service Areas

In November 2005 Cofetel issued guidelines for making changes to local service areas, including the consolidation of such local
service areas. We contested these guidelines in an administrative proceeding that was rejected by the Communications Ministry. We subsequently challenged the legality of the guidelines before the Third Metropolitan Regional Federal Court of Justice
for Tax and Administrative Matters, which is pending. In addition, beginning in March 2007 Cofetel issued several resolutions pursuant to these guidelines to consolidate 198 local service areas, reducing the number of local service areas from the
current total of 397. These resolutions were nullified by a federal court in November 2009. If the guidelines are upheld and new resolutions to consolidate our local service areas are implemented by Cofetel, we believe this consolidation could have
an adverse impact on our revenues from long-distance service. SeeItem 8. Financial InformationLegal Proceedings.

Prices

The General Communications Law, the Federal
Telecommunications Law and the Telecommunications Regulations provide that the basis for setting the prices charged by a telecommunications concessionaire is set forth in its concession.

Under the Concession, our prices in any period for basic telephone services, including installation, monthly rent, measured local service
and long-distance service, are subject to a ceiling on the price of a basket of such services weighted to reflect the volume of each service provided by us during the preceding period. There is also a price floor based among other
things, on a study of the average long-run incremental cost. Within this aggregate price range,



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we are free to determine the structure of our own prices. We must get permission from Cofetel in order to change our prices.

The price cap varies directly with the Mexican National Consumer Price Index, allowing us to raise nominal prices to keep pace with
inflation (minus a productivity factor set for the telecommunications industry), subject to consultation with the Communications Ministry. We have not raised our nominal prices since March 2001 for local service and since March 1999 for
long-distance service. Under the Concession, the price cap is also adjusted periodically to pass on the benefits of our increased productivity to our customers. The Communications Ministry sets a new periodic adjustment for every four-year period to
permit us to maintain an internal price of return equal to our weighted average cost of capital. The Communications Ministry fixed the adjustment per quarter in nominal terms at 0.74% for 2003-2006 and 0.84% for 2007-2010. For services extending
beyond basic telephone service, the Federal Telecommunications Law and the Concession permit us, subject to registration with Cofetel, to set our prices free of price regulation. These services include data transmission, directory services and
services based on digital technology, such as caller ID, call waiting, speed dialing, automatic redialing, voice mail, as well as three-way conference and call transfer.

In June 2010, pursuant to the terms of the Concession, we provided Cofetel with a study and proposal of prices for basic telephone services that would apply for the next four-year period. Cofetel decided
that our proposal would be submitted for review to a panel of three experts. One expert was selected by Cofetel, another was selected by Telmex, and in January 2012, the third expert was selected by mutual agreement.

Interconnection

We are
required under the Federal Telecommunications Law to permit any operator to connect to our network in a manner that enables customers to make and receive calls from any operator. Cofetel rules governing the interconnection rights and obligations of
local service concessionaires require local service concessionaires to provide interconnection on a nondiscriminatory basis to any other concessionaire. The Concession provides that other terms of interconnection, including fees, are to be
negotiated between us and each other long-distance carrier, and that, in the event the parties are unable to agree, the Communications Ministry imposes the terms. As of December 31, 2011, we have entered into interconnection agreements with all
operators that have requested interconnection services.

In Mexico, under the calling party pays service, our
fixed-line customers pay us an interconnection charge when they call a cellular telephone. In February 2009, Cofetel published the Fundamental Technical Plan, which requires operators with the greatest number of access points to provide other
operators with access to our network on an unbundled basis that disaggregates the prices for different service elements. This plan could have a negative impact on us and on the telecommunications sector in general, because it establishes
additional obligations to concessionaries. In particular, we believe this may result in pricing network access at prices below the recovery cost for our infrastructure investments. In October 2009, Cofetel issued two resolutions determining that we
and Telnor are operators with the largest number of access points in our respective concession coverage areas. We filed petitions for constitutional relief against the Fundamental Technical Plan and these other resolutions and those petitions are
still pending. In July 2011, Telnor obtained a favorable resolution against the Fundamental Technical Plan.

In June 2011,
Cofetel notified Telmex and Telnor of some resolutions mandating reductions to the interconnection prices that Telmex and Telnor charge other telecommunications providers. Specifically, Cofetels resolutions reduced interconnection fees by 65%
and redefined the legal nature of transport of long distance service (resale) that the Company provides other competitors establishing a fee of P.4.53 cents per minute, a reduction of 94% from the previous price of P.75 cents per minute. Telmex and
Telnor have filed petitions to challenge these resolutions. The outcome of these appeals is still pending.



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CAPITAL EXPENDITURES

The following table sets forth, our capital expenditures, before retirements, for each year in the two-year period ended
December 31, 2011. Like other financial information in this annual report, the amounts shown below for capital expenditures reflect only our continuing operations and include only the investments corresponding to each year.



|                                            |  |                         |          |  |      |  |          | 
|------------------------------------------- |  | ----------------------- | -------- |  | ---- |  | -------- | 
|                                            |  | Year ended December 31, |         
|                                            |  | 2011                    |          |  | 2010 | 
|                                            |  | (in millions of pesos)  |         
|Data, connectivity and transmission network |  |                         | P.11,117 |  |      |  | P.5,955  | 
|Internal plant                              |  |                         | 939      |  |      |  | 475      | 
|Outside plant                               |  |                         | 944      |  |      |  | 918      | 
|Information Technologies                    |  |                         | 384      |  |      |  | 309      | 
|Other                                       |  |                         | 1,760    |  |      |  | 2,931    | 
|                                            |  |                         |          |  |      |  |          | 
|Total capital expenditures                  |  |                         | P.15,144 |  |      |  | P.10,588 | 
|                                            |  |                         |          |  |      |  |          | 

In 2011, our total capital expenditures increased by 43.0%. Our consolidated capital expenditures totaled
P.15.1 billion (U.S.$ 1,165.2 million) in 2011. The investments in our data, connectivity and transmission networks (P.11.1 billion or U.S.$ 855.4 million in 2011) as a percentage of our consolidated capital expenditures was 73.4% in 2011
compared to 56.2% in 2010.

We have budgeted capital expenditures in an amount equivalent to approximately P.13.5 billion
(U.S.$ 1,070.0 million) for the year 2012, of which 68.7% (P.9.3 billion or U.S.$ 735.1 million) are budgeted for investments in our data, connectivity and transmission network. Budgeted capital expenditures exclude any other investments we may make
to acquire other companies. For subsequent years, our capital expenditures will depend on economic and market conditions. If we receive authorization to provide triple-play services, we will evaluate whether to increase our capital expenditures to
invest in related equipment. Our budgeted capital expenditures are financed through operating cash flows and limited borrowing.



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OTHER MATTERS

Investments

We
occasionally make investments and enter into joint ventures in telecommunications-related businesses within and outside Mexico.

Plant,
Property and Equipment

We have transmission facilities, exchanges, outside plant and commercial and administrative offices
throughout Mexico. We own most of the locations of our exchanges and offices and lease other locations. We carry casualty insurance against loss or damage to buildings, equipment contained in buildings and outside plant, including our fiber-optic
network.

We have purchased equipment from a variety of suppliers, and there are sufficient alternative sources of equipment
so that interruption of any source would be unlikely to cause a significant disruption to our operations or our investment plan.

The
Telmex Foundation

In 1996, Telmex Foundation (Fundación Telmex, A.C.) was created, as a not-for-profit
entity active in the areas of education, health, nutrition, justice, culture, sports and natural disaster relief. We do not consolidate the Telmex Foundations results into our financial statements.



|Item 4A. | Unresolved Staff Comments
|-------- | -------------------------

None.



|Item 5. | Operating and Financial Review and Prospects
|------- | --------------------------------------------

The following discussion should be read in conjunction with our consolidated financial statements and notes thereto included in this annual report. Our consolidated financial statements have been
prepared in accordance with IFRS.

Overview

Our total revenues have fallen in recent years, as declining revenues from local, interconnection and long-distance services have been only partly offset by increasing revenues from the data and other
services. We have not raised our prices on an inflation-adjusted basis since 2001 because of our desire to pass our efficiency gains to our customers and due to the competitive nature of the market. We have given discounts for our services,
particularly long-distance and Internet service. Revenues have also declined partly because of the preferential prices of voice services which are included in our infinitum ADSL service packages.

Market conditions and changing technologies have had an important impact on our financial performance. We expect continued pressure on
prices for basic telephone services. In local service, rapid growth in cellular telecommunications has made cellular phone operators important competitors for local networks. In addition, local and long-distance services face competition from other
means of communication such as cable providers, private circuits and the Internet, including VoIP. In contrast, our data business is growing. The number of our broadband Internet access subscribers (infinitum ADSL) grew by 8.1% in 2011, and we
expect that it will continue to grow and may affect the usage of other services.

Our mix of revenues has been changing.
Revenues from voice services represented 61.2% of our total revenues in 2011 compared to 65.1% in 2010, while revenues from data services represented 32.5% of our total revenues in



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2011 compared to 29.0% in 2010. These changes and trends have also affected our profit
margins. In 2011, total revenues decreased by 1.3% and our operating profit decreased by 5.3%. Our operating margin decreased to 23.7% in 2011 from 24.7% in 2010 because of the changing mix and trends of our businesses.

We expect that our revenues attributable to voice services will continue to decline as a result of continued pressure on prices, the
reduction in calling party pays prices and continued migration of customers to cellular and alternative products. We expect that our revenues from data services will continue to increase as a percentage of our total revenues as demand for integrated
telecommunications solutions among corporate customers rises and Internet penetration rates among residential and commercial customers increases. We expect that the decline in revenues from voice services will be partly offset by an increase in data
services revenues.



| |  |  | Our future results may be affected by general economic and financial conditions in Mexico and the United States, including the level of economic
growth, exchange rate and interest rate fluctuations and inflation. Our performance may also be affected by acquisitions and other investments we may make. Exchange rate variations on our U.S. dollar-denominated indebtedness contribute to the
volatility of our financing cost, which we manage through the use of derivative instruments. Exchange loss, net, was P.205 million in 2011 and in 2010 exchange gain, net, was P.394 million.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | We may be affected by actions taken by regulatory authorities and legal proceedings in connection with regulatory matters. See Item 4.
Information on the CompanyRegulationand Item8.Legal Proceedings.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Transition to IFRS

Beginning in 2012, Mexican issuers with securities listed on the Mexican Stock Exchange are required to prepare financial statements in accordance with IFRS. Issuers were allowed to voluntarily report
using IFRS before the change in the reporting standards became mandatory. We began preparing our consolidated financial statements in accordance with IFRS for the year ending December 31, 2011, with an IFRS adoption date of December 31,
2011 and a transition date to IFRS of January 1, 2010. Note 2 to our audited consolidated financial statements contains an analysis of the valuation, presentation and disclosure effects of adopting IFRS and a reconciliation between Mexican FRS
and IFRS for our statement of financial position as of January 1, 2010 and December 31, 2010 and our statement of income for the year ended December 31, 2010.

Presentation in IFRS

The transition to IFRS has been carried out
pursuant to IFRS 1 First time adoption of International Financial Reporting Standards. This standard provides mandatory exceptions which prohibit retrospective application of IFRS in some areas, particularly where retrospective
application would require judgments by management about past conditions after the outcome of a particular transaction is already known.

In connection with our adoption of IFRS, we applied certain mandatory exceptions from IFRS that are required in connection with the initial adoption of IFRS. The mandatory exceptions we applied are those
relating to (1) the determination of estimates at the date of transition to IFRS; (2) derecognition of financial assets and liabilities; (3) hedge accounting; (4) non-controlling interest; and (5) classification and
measurements of financial assets.

IFRS 1 also establishes optional exemptions in specific areas where the costs of complying
with IFRS may exceed the benefits to be gained by users of the financial statements. Below we describe the optional exemptions on which we relied, together with a discussion of the impact that the treatment specified by IFRS would have had absent
our election to rely on the relevant exemption. See Note 2 to our audited consolidated financial statements.



| |  |  | Deemed Cost. We used the revalued cost of property, plant and equipment under Mexican FRS at December 31, 2009 as deemed cost at the date
of transition to IFRS. If we had adopted the historical cost methodology under IFRS, the cost of our property, plant and equipment would have been recognized based on their historical cost and we would have reversed inflation adjustments. If we had
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



29



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| | adopted the fair value methodology under IFRS, the cost of our property, plant and equipment would have been determined based on an appraisal as of the date of transition to IFRS
and following periods.
| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Employee Benefits. We decided to apply retrospectively the corridor-approach under International Accounting Standard
(IAS) 19, Employee benefits. Therefore, the recognition of the actuarial losses and gains has been deferred. If we had applied the exemption provided by IFRS 1, all cumulative unrecognized actuarial gains and losses would
have been recognized at the date of transition to IFRS with the effect posted directly against equity. Also, since IFRS do not provide specific guidelines for recognizing deferred employee profit sharing and termination benefits of the employment
relationship for other reasons than a restructuring, our liabilities for deferred employee profit sharing and for termination benefits were not recognized at the date of transition to IFRS.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Cumulative Translation Differences. A first-time adopter need not comply with the requirements of IAS 21, The effects of changes in
foreign exchange rates, for cumulative translation differences that existed at the date of transition to IFRS. Therefore, the cumulative translation effect from foreign entities determined in conformity with Mexican FRS was deemed to be zero
at the date of transition to IFRS. If we had not applied this exemption, we would have had to apply IAS 21 retrospectively to the financial statements of our foreign operations in IFRS from their date of inception or later acquisition onwards, and
then determine the cumulative translation differences arising in relation to each of these foreign operations.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

IFRS 1 provides no exemptions or exceptions relating to the accounting for income taxes. As a result, a first-time adopter should apply IAS 12, Income taxes, as if it had always been the
governing standard. In this regard, a first-time adopter should recalculate its deferred taxes based on the difference between the carrying amount of the assets and liabilities in the first-time adopters opening IFRS statement of financial
position and their respective tax basis. As a result of the exceptions and exemptions applied, as well as the differences previously described, there were modifications in the accounting values of certain assets and liabilities. As a consequence,
deferred taxes were recalculated in accordance with IAS 12 at the IFRS transition date.

Changes in IFRS

Note 3 to our audited consolidated financial statements discusses new accounting pronouncements under IFRS that have
been published in 2011. These accounting pronouncements were not effective as of December 31, 2011 and have not been reflected in the presentation of our financial statements included in this annual report. Among other modifications to existing
IFRS is the recognition of the changes in the defined benefit obligation and plan assets for employee benefits when they occur, eliminating the corridor approach. The Company expects the amended guidance, upon adoption, to result in the recognition
of unamortized actuarial losses, described in Note 12 to our audited consolidated financial statements, under Accumulated other comprehensive income items in equity. We are still evaluating the impact that these pronouncements may have
on our consolidated financial statements.



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Summary of Operating Profit and Net Profit

The table below summarizes our consolidated income statement for the recent two years.



|                                                                |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|--------------------------------------------------------------- |  | ------------------------ | -------- | - | --------------------------------- |  | ----- | --------------------- |  |  | -------------------------------- | - |  |  | ----- | -
|                                                                |  | Years ended December 31, |         
|                                                                |  | 2011                     |          |   | 2010                              | 
|                                                                |  | (in millionsof pesos)    |          |   | (percentage ofoperating revenues) |  |       | (in millionsof pesos) |  |  | (percentage ofoperatingrevenues) |  
|Operating revenues:                                             |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|Local service                                                   |  |                          | P.38,532 |   |                                   |  | 34.4  | %                     |  |  | P.41,007                         |   |  |  | 36.1  | %
|Domestic long-distance service                                  |  |                          | 11,845   |   |                                   |  | 10.6  |                       |  |  | 12,265                           |   |  |  | 10.8  |  
|International long-distance service                             |  |                          | 5,990    |   |                                   |  | 5.3   |                       |  |  | 5,646                            |   |  |  | 5.0   |  
|Interconnection service                                         |  |                          | 12,160   |   |                                   |  | 10.9  |                       |  |  | 15,023                           |   |  |  | 13.2  |  
|Data services                                                   |  |                          | 36,472   |   |                                   |  | 32.5  |                       |  |  | 32,878                           |   |  |  | 29.0  |  
|                                                                |  |                          |          |  
|Other                                                           |  |                          | 7,067    |   |                                   |  | 6.3   |                       |  |  | 6,743                            |   |  |  | 5.9   |  
|                                                                |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|                                                                |  |                          | 112,066  |   |                                   |  | 100.0 |                       |  |  | 113,562                          |   |  |  | 100.0 |  
|                                                                |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|Operating costs and expenses:                                   |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|Cost of sales and services                                      |  |                          | 38,113   |   |                                   |  | 34.0  |                       |  |  | 34,579                           |   |  |  | 30.5  |  
|Commercial, administrative and general expenses                 |  |                          | 22,381   |   |                                   |  | 20.0  |                       |  |  | 22,297                           |   |  |  | 19.6  |  
|Interconnection                                                 |  |                          | 6,549    |   |                                   |  | 5.8   |                       |  |  | 10,561                           |   |  |  | 9.3   |  
|Depreciation and amortization                                   |  |                          | 16,936   |   |                                   |  | 15.1  |                       |  |  | 17,500                           |   |  |  | 15.4  |  
|Other expenses, net                                             |  |                          | 1,505    |   |                                   |  | 1.4   |                       |  |  | 566                              |   |  |  | 0.5   |  
|                                                                |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|                                                                |  |                          | 85,484   |   |                                   |  | 76.3  |                       |  |  | 85,503                           |   |  |  | 75.3  |  
|                                                                |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|Operating profit                                                |  |                          | 26,582   |   |                                   |  | 23.7  | %                     |  |  | 28,059                           |   |  |  | 24.7  | %
|                                                                |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|Financing cost:                                                 |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|Interest income                                                 |  |                          | (386     | ) |                                   |  |       |                       |  |  | (584                             | ) |  |  |       |  
|Interest expense                                                |  |                          | 4,942    |   |                                   |  |       |                       |  |  | 5,732                            |   |  |  |       |  
|Exchange loss (gain), net                                       |  |                          | 205      |   |                                   |  |       |                       |  |  | (394                             | ) |  |  |       |  
|                                                                |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|                                                                |  |                          | 4,761    |   |                                   |  |       |                       |  |  | 4,754                            |   |  |  |       |  
|Equity interest in net profit of associated companies           |  |                          | 115      |   |                                   |  |       |                       |  |  | 196                              |   |  |  |       |  
|                                                                |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|Profit before income tax                                        |  |                          | 21,936   |   |                                   |  |       |                       |  |  | 23,501                           |   |  |  |       |  
|Income tax                                                      |  |                          | 7,333    |   |                                   |  |       |                       |  |  | 8,325                            |   |  |  |       |  
|                                                                |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|Net profit                                                      |  |                          | P.14,603 |   |                                   |  |       |                       |  |  | P.15,176                         |   |  |  |       |  
|                                                                |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|Distribution of net profit:                                     |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|Controlling interest                                            |  |                          | P.14,582 |   |                                   |  |       |                       |  |  | P.15,189                         |   |  |  |       |  
|Non-controlling interest                                        |  |                          | 21       |   |                                   |  |       |                       |  |  | (13                              | ) |  |  |       |  
|                                                                |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|                                                                |  |                          | P.14,603 |   |                                   |  |       |                       |  |  | P.15,176                         |   |  |  |       |  
|                                                                |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  
|Earnings per share attributable to equity holders of the parent |  |                          | P.0.808  |   |                                   |  |       |                       |  |  | P.0.835                          |   |  |  |       |  
|                                                                |  |                          |          |   |                                   |  |       |                       |  |  |                                  |   |  |  |       |  

Revenues

Total revenues in 2011 were P.112,066 million, a decrease of 1.3% compared to 2010, primarily due to a decline in revenues from local, interconnection and long-distance services, partly offset by the
increase in revenues generated from data services and other revenues. The percentage of our revenues attributable to voice services (including local, long-distance and interconnection services) declined from 65.1% in 2010 to 61.2% in 2011, while
revenues from data services grew to 32.5% of our revenues in 2011 compared to 29.0% in 2010.



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Local Service Revenues

Operating revenues from local services include installation charges for new lines, monthly line rental charges, monthly fees for digital
services and monthly measured service charges based on the number of calls. These revenues depend on the number of billed lines, the number of new lines installed and the volume of calls. Measured service charges are due from residential customers
only for the number of local calls exceeding a specified monthly allotment. Accordingly, revenues from local service for residential customers do not depend solely on usage volume.

Revenues from local service decreased by 6.0% in 2011. The decrease was principally due to reductions in local traffic, lower average
revenue per local billed call and the reduction in billed lines due to competition from both wireless and other fixed-line service providers and changes in the consumption profile of our customers.

Domestic Long-distance Revenues

Operating revenues from domestic long-distance service consist of (a) amounts earned from traffic of our customers and (b) amounts earned from other telecommunications operators for terminating
their domestic long-distance calls. The amount of operating revenues from domestic long-distance service depends on prices and traffic volume.

Domestic long-distance revenues decreased by 3.4% in 2011. The decrease was due to a reduction in traffic from our customers and lower termination traffic from other carriers, partly offset by an increase
in average revenue per minute.

International Long-distance Revenues

Operating revenues from international long-distance service consist of (a) amounts earned from our customers and (b) amounts
earned from foreign telecommunications carriers for terminating international calls. The amount of operating revenues from international long-distance service depends on the volume of traffic, the prices to our customers, the prices charged by each
party under agreements with foreign carriers, principally in the United States, and the effects of competition. We report international long-distance revenues gross of the settlement amounts payable to foreign carriers, which are recorded in cost of
sales and services. In 2011, settlement payments from foreign carriers represented 2.6% of our consolidated revenues and 48.0% of our international long-distance revenues. Settlement payments under service agreements with foreign carriers are
generally denominated in U.S. dollars.

International long-distance revenues increased by 6.1% in 2011. The increase was
primarily the result of an increase in incoming international long distance traffic revenues of 18.2% year over year. This increase was driven by a 28.1% increase in incoming traffic year over year, which was partly offset by a decrease in
interconnection prices received from U.S. carriers. There was a decrease in average revenue per minute of outgoing traffic which resulted from the inclusion of international long distance minutes in some telecommunications services packages with
infinitum ADSL services and an increase of 13.9% in outgoing traffic.

Revenues from Interconnection Services

Revenues from interconnection service are comprised of fees for connection with our network of fixed-to-cellular,
cellular-to-fixed and long-distance calls. Calls from fixed to cellular telephones are subject to the calling party pays service, which covers long-distance calls as well as local calls. In the case of local and domestic long-distance
services, under calling party pays services, our fixed-line customers pay us an interconnection charge when they call a cellular telephone. We recognize the amount paid to us under interconnection revenue, and we recognize the amount we
pay to the cellular carriers as interconnection cost.

Revenues from interconnection services decreased by 19.1% in 2011. The
decrease was primarily due to decreases in calling party pays prices of 10.6% and a decline in calling party pays traffic due to increased market penetration by cellular phone operators. In 2011, revenues from
fixed-to-cellular calls accounted for 86.5% of interconnection revenues (85.0% in 2010) and revenues from local and long-distance operators represented 7.3% of



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interconnection revenue (9.9% in 2010). The balance of interconnection revenues represented payments from cellular phone carriers for cellular-to-fixed calls.

Revenues from Data Services

Revenues from data services consist of revenues from Internet access for broadband and dial-up services and corporate networks. Revenues from Internet access service include service fees for broadband and
dial-up Internet access. Revenues from corporate networks mainly consist of revenues from installing and leasing dedicated private lines, revenues from virtual private network (VPN) services and revenues from the sale of value-added and IT services
to these customers.

Revenues from data services increased by 10.9% in 2011. The increase was primarily due to an 8.1%
increase in infinitum ADSL Internet access accounts which brought the number of subscriptions to 8.0 million. Revenue from data services also increased due to higher revenues of value-added services for the corporate market.

Other Revenues

The main components of other revenues are sales of computers, telephones and accessories at Telmex stores and billing and collection services offered to third parties. Other revenues increased by 4.8% in
2011. The increase was mainly due to increased sales of computers at Telmex stores and higher revenues from our billing and collection services.

Operating Costs and Expenses

Cost of Sales and Services

Cost of sales and services increased by 10.2% in 2011. The increase was primarily due to higher costs related to
projects for corporate customers, higher maintenance and operating expenses for our telecommunications services, higher termination costs for calls to other countries and the cost of goods sold attributable to increased sales of computers and
telecommunications equipment at Telmex stores.

Commercial, Administrative and General Expenses

Commercial, administrative and general expenses increased by 0.4% in 2011. The increase was primarily due to higher labor costs and
maintenance expenses, partially offset by lower charges for doubtful accounts receivable.

Interconnection Costs

Interconnection costs include payments to cellular phone carriers for calling party pays services.
Interconnection costs decreased by 38.0% in 2011. The decrease was due to both a decline in the price paid to cellular phone operators for calls under calling party pays services and a decline in fixed-to-cellular traffic.

Depreciation and Amortization

Depreciation and amortization decreased by 3.2% in 2011. The decrease was due to lower additions to property, plant and equipment in recent years in comparison to prior years.

Other Expenses, Net

Other expenses, net, amounted to P.1,505 million in 2011 and P.566 million in 2010. Other expenses, net, mainly consist of the net amount
we are required to recognize under our employee profit sharing obligations expense. Telmex, like other Mexican companies, is required by law to pay its employees, in addition to their agreed compensation and benefits, profit sharing in an aggregate
amount equal to 10% of our taxable income (calculated without reference to inflation adjustments).



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Operating Profit

In 2011, operating profit decreased by 5.3%, reflecting the 1.3% decrease in revenues. Operating margin decreased to 23.7% in 2011 from 24.7% in 2010.

Financing Cost

Part of our indebtedness (44.8% at December 31, 2011) is denominated in U.S. dollars, and we engage in derivative transactions to manage our exposure to exchange rate variation.

In 2011, net financing cost was P.4,761 million compared with P.4,754 million in 2010. The changes in each component were as follows:



| |  |  | Interest income decreased by 33.9% in 2011. The decrease was due to a lower level of average interest-bearing assets.
| | - |  | ---------------------------------------------------------------------------------------------------------------------



| |  |  | Interest expense decreased by 13.8% in 2011. The decrease was primarily due to a lower average level of debt and lower net fair value losses on
interest-rate swaps (P.959 million in 2011, and P.1,688 million in 2010).
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | We recorded net exchange loss of P.205 million in 2011. The net exchange loss was due to depreciation of the peso against the U.S. dollar by
approximately 13.1%, based on the period-end exchange rates, partly offset by net fair value gain on currency hedging instruments.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Income Tax

The statutory rate of the Mexican corporate income tax was 30%
in 2011 and 2010. Under the Mexican Tax Reform Law approved in December 2009, the corporate income tax rate was increased from 28% to 30% for 2010 through 2012, and will be scaled back to 29% in 2013 and 28% in 2014 and future years.

Our effective rate of corporate income tax as a percentage of pre-tax profit was 33.4% in 2011 and 35.4% in 2010. Although after
2007 we no longer recognize the effects of inflation in our financial statements, we do continue to recognize the impact of inflation for tax reporting purposes. This causes our taxable income to be affected by taxable monetary gain on our net
monetary liabilities and by higher depreciation due to the application of inflation indexation on our assets. Our effective tax rate in 2011 was lower than in 2010 mainly due to a lower inflation rate of 3.8%.

The Flat-Rate Business Tax (FRBT or Impuesto Empresarial a Tasa Única) is computed by applying the applicable rate to
income determined on the basis of cash flows, which is determined by deducting authorized deductions from all income collected from those activities that are subject to the tax. Certain FRBT credits also may be deducted from the FRBT payable. The
applicable FRBT rate is currently 17.5%.

FRBT is payable only to the extent it exceeds income tax for the same period. To
determine FRBT payable, income tax paid in a given period is first subtracted from the FRBT of the same period. For the years ended December 31, 2011 and 2010, no FRBT was due.

Net Profit

Net profit decreased by 3.8% in 2011. The decrease was due
primarily to a decline in revenues from voice services.

Liquidity and Capital Resources

Our main capital requirements are capital expenditures, dividend payments, share repurchases and the repayment of debt. We have generally
met our capital requirements primarily from operating cash flows and some



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limited borrowing. Cash flows provided by operating activities were P.27,162 million in 2011 and P.39,567 million in 2010.

We had a working capital surplus of P.446 million at December 31, 2011 and of P.4,086 million at December 31, 2010. We believe
that our working capital is sufficient to cover our current requirements.

Our capital expenditures were P.15,144 million in
2011 and P.10,588 million in 2010. In 2011, we used 73.4% of our capital expenditures for projects in data, connectivity and transmission networks, and the balance for operational support projects. If we receive authorization to provide triple-play
services, we will evaluate whether to increase our capital expenditures to invest in related equipment.

The
amount we spent on share repurchases was P.1,359 million in 2011 and P.340 million in 2010. The amount spent on share repurchases is determined from time to time by the Board of Directors taking into account factors including the price of our shares
and our capital resources. See Item 16E. Purchases of Equity Securities by the Issuer and Affiliated Purchasers.

Dividends paid totaled P.9,509 million in 2011 and P.8,737 million in 2010.

In
the table below we set forth certain contractual obligations as of December 31, 2011, consisting of debt and purchase obligations, and the period in which the contractual obligations come due. The amount of our long-term debt reported in the
table excludes interest and fee payments, which are primarily variable amounts, and does not reflect derivative financial instruments, which provide for payment flows that vary depending on exchange rates and interest rates. Purchase obligations
include capital commitments primarily for equipment supply and maintenance contracts. The table below does not include pension liabilities, deferred taxes or current accounts payable.



|                         |  |                                                 |          |  |      |  |          |           |  |  |           |  |  |                |          |  |  |  |          | 
|------------------------ |  | ----------------------------------------------- | -------- |  | ---- |  | -------- | --------- |  |  | --------- |  |  | -------------- | -------- |  |  |  | -------- | 
|                         |  | Payments Due by Period(as of December 31, 2011) |         
|                         |  | Total                                           |          |  | 2012 |  |          | 2013-2014 |  |  | 2015-2016 |  |  | 2017 andbeyond |         
|                         |  | (in millions of pesos)                          |         
|Contractual obligations: |  |                                                 |          |  |      |  |          |           |  |  |           |  |  |                |          |  |  |  |          | 
|Total debt(1)            |  |                                                 | P.71,793 |  |      |  | P.12,676 |           |  |  | P.20,853  |  |  |                | P.25,717 |  |  |  | P.12,547 | 
|Purchase obligations     |  |                                                 | 10,143   |  |      |  | 8,836    |           |  |  | 1,307     |  |  |                |         |  |  |  |         | 
|                         |  |                                                 |          |  |      |  |          |           |  |  |           |  |  |                |          |  |  |  |          | 
|Total                    |  |                                                 | P.81,936 |  |      |  | P.21,512 |           |  |  | P.22,160  |  |  |                | P.25,717 |  |  |  | P.12,547 | 



|(1) | Excludes interest payments, fees and the effect of derivative financial instruments.
|--- | ------------------------------------------------------------------------------------

At December 31, 2011, we had total indebtedness of P.71,793 million (approximately U.S.$ 5,136 million) compared to total
indebtedness of P.74,521 million (approximately U.S.$ 6,031 million) at December 31, 2010. In 2011, we incurred additional peso-denominated debt and reduced our debt by repaying P.26,138 million.

The primary repayments in 2011 consisted of the partial repayment of domestic senior notes in an amount of P.4,000 million (U.S. $344
million) in July, and the partial repayment of a loan to América Móvil in an amount of P.6,722 million (U.S.$500 million) in October.

Of our total debt at year-end 2011, P.12,676 million (U.S.$907 million) is scheduled to come due in 2012. This includes domestic senior notes for P.4,500 million (U.S.$322 million) that mature in April,
and two syndicated loans in the amount of U.S.$235 million and U.S.$250 million that were prepaid in March 2012, five and three months earlier than their stated maturity date in August and June 2012, respectively. In 2012, we expect to refinance
part of our maturing debt with new borrowings, depending on market conditions in the capital markets.

The major categories of
indebtedness are as follows:



| |  |  | Foreign currency-denominated bank loans. At December 31, 2011, we had two syndicated loan facilities, loans with support from export credit
agencies and other loans. Most of our bank facilities bear interest at specified spreads over the London Interbank Offered Rate (LIBOR). The weighted
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | average interest rate at December 31, 2011 was approximately 0.9%. We had U.S.$1,628 million (P.22,760 million) in bank loans outstanding at December 31, 2011. Of the U.S.$3,000 million
credit facility we obtained in August 2006, we had a tranche of U.S.$700 million that remained outstanding, a portion of which in the amount of U.S.$235 million was prepaid in March 2012, for which the original maturity was scheduled in August 2012.
In June 2006, we obtained a U.S.$500 million syndicated loan facility divided into two equal tranches, of which one tranche of U.S.$250 million that remained outstanding was prepaid in March 2012, for which the original maturity was scheduled in
June 2012.
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Certain of our bank loans contain financial and operating covenants. The financial covenants require us to maintain a consolidated ratio of EBITDA to
interest expense of no less than 3.00 to 1.00 and a consolidated ratio of total debt to EBITDA of no more than 3.75 to 1.00 (using terms defined in the credit agreements). Compliance with these covenants has not been a significant constraint on our
ability to obtain financing.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Senior notes issued outside Mexico.We had U.S.$932 million (P.13,031 million) and P.4,500 million aggregate principal amounts of senior notes
outstanding at December 31, 2011. We have three outstanding series of senior notes issued outside of Mexico:
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|              |  |                       |  |          |      |   |                                                  |          
|------------- |  | --------------------- |  | -------- | ---- | - | ------------------------------------------------ | ---------
|Maturity      |  | Issuance              |  | Interest |      |   | Outstanding Amountat December 31, 2011(millions)
|January 2015  |  | January/February 2005 |  |          | 5.50 | % |                                                  | U.S.$ 555
|January 2016  |  | January 2006          |  |          | 8.75 | % |                                                  | P.4,500  
|November 2019 |  | November 2009         |  |          | 5.50 | % |                                                  | U.S.$ 377



| |  |  | In February 2011, América Móvil offered to acquire from eligible bondholders our 5.5% senior notes due 2015 and our 5.5% senior notes due
2019 in exchange for new debt securities of América Móvil. As a result, in March 2011, América Móvil acquired U.S.$243.6 million of senior notes due 2015 and U.S.$122.6 million of senior notes due 2019. We purchased from
América Móvil all the notes that América Móvil acquired in the exchange offer for an aggregate price of U.S.$394 million, which represents a premium of U.S.$27.8 million over par, and we extinguished those senior notes.
The price we paid was based on the market value of the América Móvil notes issued in the exchange offer.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Peso-denominated senior notes issued in Mexico.We have issued peso-denominated senior notes (certificados bursátiles) from time
to time in the Mexican market. Some of these notes bear interest at fixed rates and some bear interest at specified spreads based on the Mexican interbank equilibrium interest rate (Tasa de Interés Interbancaria de Equilibrio). At
December 31, 2011, we had P.21,400 million of such notes outstanding, maturing from 2012 to 2037, and the weighted average interest rate was 6.4%.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

We also have smaller amounts of other categories of outstanding indebtedness, including peso-denominated loans from Mexican banks and supplier credits for equipment financing. We rely primarily on
borrowings in the Mexican and international capital markets and from Mexican and international banks, although if market conditions change, we may seek funding from other sources. A number of our financing instruments are subject to either
acceleration or repurchase at the holders option if there is a change of control, as defined in the respective instruments. The definitions of change of control vary, but none of them is met so long as Carso Global Telecom, any of its
affiliates or one or more of the members of the family of Carlos Slim Helú who were beneficial owners of the shares of Carso Global Telecom at the date of the original instrument continue to control a majority of our voting stock.

At December 31, 2011, 44.8% of our total consolidated indebtedness was denominated in U.S. dollars, 49.9% was denominated in Mexican
pesos and the remainder was denominated in other currencies. Our currency hedging practices are described below.

At
December 31, 2011, 65.7% of our debt obligations bore interest at floating rates. The weighted average cost of all borrowed funds at December 31, 2011 (including interest and reimbursement of certain lenders for Mexican



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taxes withheld, but excluding fees and the effect of interest-rate swaps) was approximately 4.5% (compared to approximately 4.3% at December 31, 2010). The inclusion of fees and the effect
of interest-rate swaps in the calculation of weighted average cost of all borrowed funds at December 31, 2011 would increase such cost by 1.4% to approximately 5.9% (compared to approximately 6.6% at December 31, 2010). Such cost does not
include the effect of exchange rate variations. We have not pledged any assets as security for our debt.

We provide more
information about the restrictions related to our debt in Note 9 to our audited consolidated financial statements.

Derivatives and Hedging

A substantial part of our indebtedness is denominated in U.S. dollars (44.8% as of December 31, 2011), and we have
relatively limited assets and revenues denominated in U.S. dollars. As of December 31, 2011, our U.S. dollar-denominated indebtedness amounted to P.32,187 million. In addition, a substantial part of our indebtedness bears interest at variable
rates (65.7% as of December 31, 2011). As a result, we are exposed to risks from changing currency exchange rates and interest rates.

To offset these risks, we enter into derivative financial instruments with large financial institutions to minimize the impact of fluctuations in exchange rates and variable interest rates on our
indebtedness. We have not entered into derivative financial instruments for any other purposes, although we may do so in the future. The types of derivative financial instruments we have typically entered into in recent periods include
cross-currency swaps (in which we generally pay peso amounts based on peso interest rates and receive U.S. dollar amounts based on dollar interest rates), interest-rate swaps (in which we generally pay amounts based on fixed interest rates and
receive amounts based on variable interest rates) and forward exchange contracts (in which we generally agree to use pesos to purchase U.S. dollars at a future date).

Our use of derivatives varies from time to time, depending on our judgment about our level of exposure to exchange rate and interest rate risk, and the costs of derivative financial instruments. The
aggregate notional amount of our interest-rate swaps may be greater or less than the principal amount of our debt, and we may discontinue hedging at any time. We review and change our derivatives positions regularly, and our derivatives policies
change from time to time. Under IFRS, we account for the derivative financial instruments on a fair value basis. See Note 9 to our audited consolidated financial statements.

We have engaged in derivatives transactions to reduce our exposure to changes in exchange rates. As of December 31, 2011, our cross-currency swaps covered foreign currency liabilities of U.S.$2,101
million, although the amount of our derivatives position varies from time to time.

We have also engaged in derivatives
transactions to reduce our exposure to changes in interest rates. Specifically, we have entered into interest-rate swaps in which we pay interest at a fixed rate and receive interest at a variable rate, on a notional amount in Mexican pesos or
U.S. dollars. From time to time, we have also entered into interest-rate swaps in which we pay variable rates and receive fixed rates, as part of the management of our overall position. The general effect of these swaps is to replace an
obligation to pay variable-rate interest on our debt with an obligation to pay fixed-rate interest. As of December 31, 2011, the aggregate notional amount of our peso-denominated variable rate to fixed rate interest-rate swaps was P.12,840
million.

The net fair value of our derivative financial instruments was an asset of P.4,618 as of December 31, 2011.

Off-Balance Sheet Arrangements

We do not have any off-balance sheet arrangements of the type that we are required to disclose under Item 5E of Form 20-F.



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Use of Estimates in Certain Accounting Policies

In preparing our financial statements, we make estimates concerning a variety of matters. Some of these matters are highly uncertain, and
our estimates involve judgments we make based on the information available to us. In the discussion below, we have identified several of these matters for which our financial presentation would be materially affected if either (a) we used
different estimates that we could reasonably have used or (b) in the future we change our estimates in response to changes that are reasonably likely to occur.

The discussion addresses only those estimates that we consider most important based on the degree of uncertainty and the likelihood of a material impact if we used a different estimate. There are many
other areas in which we use estimates about uncertain matters, but the reasonably likely effect of changed or different estimates is not material to our financial presentation.

Estimated Useful Lives of Plant, Property and Equipment

We estimate the useful lives of particular classes of plant, property and equipment in order to determine the amount of depreciation
expense to be recorded in each period. Depreciation expense is a significant element of our costs, amounting in 2011 to P.16,818 million, or 19.7% of our operating costs and expenses, under IFRS. See Notes 6 to our audited consolidated financial
statements.

The estimates are based on historical experience with similar assets, anticipated technological changes and other
factors, taking into account the practices of other telecommunications companies. We review estimated useful lives periodically to determine whether they should be changed, and at times we have changed them for particular classes of assets. We may
shorten the estimated useful life of an asset class in response to technological changes, changes in the market or other developments. This results in increased depreciation expense, and in some cases it can result in our recognition of an
impairment charge to reflect a write-down in value. The same kind of developments can also lead us to lengthen the useful life of an asset class, resulting in reduced depreciation expense.

Employee Pensions and Seniority Premiums

We recognize liabilities on our statement of financial position and expenses in our statement of income to reflect our obligations to pay employees under defined benefit retirement and seniority premium
plans. The amounts we recognize are determined on an actuarial basis that involves many estimates and accounts for post-retirement and termination benefits in accordance with IFRS. In 2011, we recognized net period cost relating to these obligations
of P.5,435 million (P.5,364 million in 2010) under IFRS.

We use estimates in four specific areas that have a significant
effect on these amounts: (a) the discount rates that we use to calculate the present value of our future obligations, (b) the rate of increase in salaries that we assume we could observe in future years, (c) the rate of return we
assume our pension fund will achieve on its investments and (d) the expected rate of inflation. Certain assumptions are identified in Note 12 to our audited consolidated financial statements. These estimates are based on our historical
experience, on current conditions in the financial markets and on our judgments about the future development of our salary costs and the financial markets. We review the estimates each year, and if we change them, our reported expense for pension
costs may increase or decrease.

Our liability for future pensions and seniority premiums is also affected by our estimate of
the number of retired employees, and our pension fund is affected by the estimated rate of return on investments. Actual results may vary from these estimates. In 2011, P.22,014 million was due to (i) a decrease of P.16,989 million in value of
plan assets invested in equity securities and to variations in reference rates that resulted in a decrease in the value of plan assets invested in fixed-income instruments, and (ii) an actuarial loss of P.5,025 million attributable mainly to a
higher than estimated number of employees retiring and higher than estimated salaries and pension benefits of retired employees. See Note 12 to our audited consolidated financial statements.

As of December 31, 2011, 49.6% of fund assets consisted of peso-denominated fixed-income securities and 50.4% consisted of
variable-income securities. The fund has experienced volatile returns on its investments in equity securities, which resulted in net losses on plan assets in prior years.



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Allowance for Doubtful Accounts Receivable

We maintain an allowance for doubtful accounts receivable based on our estimates of losses we may experience because our customers or
other telecommunications carriers do not pay the amounts they owe us. At December 31, 2011, the balance of the allowance was P.5,508 million. For our customers, we perform a statistical analysis based on our past experience, current
delinquencies and economic trends. For carriers, we make individual estimates that may reflect our evaluation of pending disputes over amounts owed. Our allowance mainly consists of accounts that are over 90 days delinquent. Our allowance could
prove insufficient if our statistical analysis of our customer receivables is inadequate, or if one or more carriers refuse or are unable to pay us. See Note 5 to our audited consolidated financial statements.

Impairment of Long-Lived Assets, Intangibles and Goodwill

We have large amounts of long-lived assets on our balance sheet. Under IFRS we are required to test long-lived assets for impairment
whenever events or circumstances indicate that the carrying amount may not be recoverable for plant, property and equipment, licenses and trademarks. Impairment testing for goodwill is required to be performed on an annual basis. At
December 31, 2011, these assets include plant, property and equipment (P.98,449 million, net of accumulated depreciation), licenses (P.620 million, net of accumulated amortization), trademarks (P.428 million net of accumulated amortization) and
goodwill (P.103 million). To estimate the fair value of long-lived assets, we typically make various assumptions about the future prospects for the business to which the asset relates, consider market factors specific to that business and estimate
future cash flows to be generated by that business. Based on these assumptions and estimates, as well as guidance provided by IFRS relating to the impairment of long-lived assets, we determine whether we need to take an impairment charge to reduce
the net carrying value of the asset stated on our balance sheet to reflect its estimated fair value. Assumptions and estimates about future values and remaining useful lives are complex and often subjective. They can be affected by a variety of
factors, including external factors such as industry and economic trends, and internal factors such as changes in our business strategy and our internal forecasts. During 2011 and 2010, we did not recognize any impairment of plant, property and
equipment, licenses, trademarks or goodwill as there were no indicators of impairment in these long-lived assets.

Fair
Value of Derivative Financial Instruments

Under IFRS, we are required to recognize all derivatives as either assets or
liabilities on our balance sheet and measure those instruments at fair value. IFRS for derivative transactions allows us to use the fair values as determined by the financial institutions with whom we enter into these transactions, which we use as
the basis for recognition of the derivative financial instruments in our financial statements. The fair value of derivative financial instruments is based on estimated settlement costs or quoted market prices supported by confirmations of these
values received from the counterparties to these financial instruments and by determinations of independent third parties applying technical models based on statistical and market data. Changes in the fair value of derivative financial instruments
are recorded each year in net profit or as a component of accumulated other comprehensive income, based on the type of hedging instrument and the effectiveness of the hedge and whether or not the derivative has been designated, and qualifies, as an
accounting hedge. The determination of the fair value of our derivative financial instruments considers the credit risk of the counterparty. See Note 3 to our audited consolidated financial statements.



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|Item 6. | Directors, Senior Management and Employees
|------- | ------------------------------------------

Management of our business is vested in the Board of Directors and the chief executive officer. Our bylaws provide for the Board of Directors to consist of a maximum of 21 directors and up to an equal
number of alternate directors. A majority of the directors and a majority of the alternate directors must be Mexican nationals and elected by Mexican shareholders. Each alternate director may attend meetings of the Board of Directors and vote
in the absence of a corresponding director.

Directors are elected by a majority of the holders of the AA Shares and A Shares
voting together, provided that any holder or group of holders of 10% of the total AA Shares and A Shares is entitled to name one of such directors and one of such alternate directors, and two directors and two alternate directors are elected by a
majority vote of the holders of L Shares. Directors and alternate directors are elected at each annual ordinary general meeting of shareholders and each annual special meeting of holders of L Shares. Pursuant to our bylaws and Mexican law, at least
25% of our directors must qualify as independent, as determined by our shareholders at their annual ordinary general meeting pursuant to the Mexican Securities Market Law (Ley del Mercado de Valores). In order to have a quorum for a meeting
of the Board of Directors, a majority of those present must be Mexican nationals.



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Our bylaws provide that the members of the Board of Directors are appointed for terms of one
year and may be reelected. The names and positions of the current 20 members of our Board of Directors elected at the annual ordinary general meeting of our shareholders held on April 25, 2012, their dates of birth and information on their
principal business activities outside Telmex are as follows:



|                                                                                     |  |                                                                               |  |                                                                                                                                                                                                                                                                                                                                                        
|------------------------------------------------------------------------------------ |  | ----------------------------------------------------------------------------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Carlos Slim Domit                                                                    |  | Born:                                                                         |  | 1967                                                                                                                                                                                                                                                                                                                                                   
|Chairman; chairman of                                                                |  | First elected:                                                                |  | 1995                                                                                                                                                                                                                                                                                                                                                   
|the executive committee                                                              |  | Term expires:                                                                 |  | 2013                                                                                                                                                                                                                                                                                                                                                   
|                                                                                     |  | Principal occupation and other directorships:                                 |  | Chairman of the board of directors of Teléfonos de México, S.A.B. de C.V.; Co-Chairman of the board of América Móvil, S.A.B. de C.V.; Chairman of the
board of directors of Grupo Carso, S.A.B. de C.V., Grupo Sanborns, S.A. de C.V. and U.S. Commercial Corp., S.A. de C.V.; Chairman of the board of directors of Carso Global Telecom, S.A. de C.V.
|                                                                                     |  | Business experience:                                                          |  | Chief Executive Officer of Sanborn Hermanos, S.A.                                                                                                                                                                                                                                                                                                      
|                                                                                     |  |                                                                              
|Antonio Cosío Ariño                                                                  |  | Born:                                                                         |  | 1935                                                                                                                                                                                                                                                                                                                                                   
|Director; member of the audit and corporate practices committee; alternate member of |  | First elected: Term
expires:                                                  |  | 1991 2013                                                                                                                                                                                                                                                                                                                                              
|the executive committee                                                              |  | Principal occupation:                                                         |  | Chief Executive Officer of Cía. Industrial de Tepeji del Río, S.A. de C.V. and Fábrica de Hilados y Tejidos Puente Sierra, S.A de C.V.                                                                                                                                                                                                                 
|                                                                                     |  | Other directorships:                                                          |  | Chairman of the board of directors of Bodegas de Santo Tomás, S.A. de C.V., Grupo Hotelero Brisas, S.A. de C.V. and Cía. Industrial de Tepeji del Río, S.A. de
C.V.                                                                                                                                                                                    
|                                                                                     |  |                                                                              
|Antonio del Valle Ruiz Director                                                      |  | Born: First
elected: Term expires: Principal
occupation: Other directorships: |  | 1938 2011
2013 Chairman of the board of directors of Grupo
Empresarial Kaluz, S.A. de C.V. Member of the board of directors of Mexichem, S.A.B. de C.V., Escuela Bancaria y Comercial, Minera las Cuevas,
Polímeros de México and Fundación Pro Empleo, A.C.                                                                                           
|                                                                                     |  | Business experience:                                                          |  | Founder of Grupo Empresarial Kaluz, S.A. de C.V., founder and Chief Executive Officer of Grupo Financiero Bital, Chairman of the Mexican Business Round Table, President of the
Mexican Bankers Association.                                                                                                                                           
|                                                                                     |  |                                                                              
|Laura Diez Barroso de Laviada Director                                               |  | Born: First
elected: Term expires: Principal
occupation:                      |  | 1951 2011
2013 President of Tenedora y Promotora Azteca,
S.A. de C.V.                                                                                                                                                                                                                                                                                  



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|                                                                           |  |                                                          |  |                                                                                                                                                                            
|-------------------------------------------------------------------------- |  | -------------------------------------------------------- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|                                                                           |  | Business experience:                                     |  | Member of the board of directors of Grupo Financiero Inbursa, S.A.B. de C.V., Fundación del Centro Histórico de la Ciudad de México A.C. and Royal Caribbean
International.
|Amparo Espinosa Rugarcía                                                   |  | Born:                                                    |  | 1941                                                                                                                                                                       
|Director                                                                   |  | First elected:                                           |  | 1991                                                                                                                                                                       
|                                                                           |  | Term expires:                                            |  | 2013                                                                                                                                                                       
|                                                                           |  | Principal occupation:                                    |  | Chief Executive Officer of Documentación y Estudios de Mujeres, A.C.                                                                                                       
|                                                                           |  | Business experience:                                     |  | Newspaper columnist; speaker at various domestic and international events.                                                                                                 
|                                                                           |  |                                                         
|Elmer Franco Macías Director                                               |  | Born First elected:
Term expires: Principal
occupation:  |  | 1940 1991
2013 Chief Executive Officer and president of
the board of directors of Infra, S.A. de C.V.                                                                      
|                                                                           |  | Other directorships:                                     |  | Member of the board of directors of Corporación Infra, S.A. de C.V., Comercial Infra, S.A de C.V., ICA, S.A. de C.V. and Banco Nacional de México, S.A.                    
|                                                                           |  | Business experience:                                     |  | Various positions at Grupo Infra since 1958.                                                                                                                               
|                                                                           |  |                                                         
|Daniel Hajj Aboumrad Director; alternate member of the executive committee |  | Born: First
elected: Term expires: Principal
occupation: |  | 1966 2011
2013 Chief Executive Officer of América
Móvil, S.A.B. de C.V.                                                                                                    
|                                                                           |  | Other directorships:                                     |  | Director of América Móvil, S.A.B. de C.V., Director of Grupo Carso, S.A.B. de C.V. and Director of Carso Global Telecom, S.A. de C.V.                                      
|                                                                           |  | Business experience:                                     |  | Chief Executive Officer of Hulera Euzkadi, S.A. de C.V.                                                                                                                    
|                                                                           |  |                                                         
|Roberto Kriete Ávila Director                                              |  | Born: First
elected: Term expires: Principal
occupation: |  | 1953 2011
2013 Chairman and CEO, TACA Airlines; President
Compañía of Kriete Group and Principal Escuela Superior de Economía y Negocios (ESEN) in El Salvador.            
|                                                                           |  | Other directorships:                                     |  | President of the board of directors, Real Intercontinental Hotel of San Salvador and President of Coatepeque Foundation.                                                   
|                                                                           |  | Business experience:                                     |  | Director, Camino Real Hotel; Director and Secretary, Banco Agrícola Commercial of El Salvador.                                                                             
|                                                                           |  |                                                         
|José Kuri Harfush                                                          |  | Born:                                                    |  | 1949                                                                                                                                                                       
|Director; member of the audit                                              |  | First elected:                                           |  | 1995                                                                                                                                                                       
|and corporate practices committee                                          |  | Term expires:                                            |  | 2013                                                                                                                                                                       
|                                                                           |  | Principal occupation:                                    |  | Chief Executive Officer of Productos Dorel,                                                                                                                                



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|                                 |  |                                                                               |  |                                                                                                                                                                                                                                                                                                                                                                                                                             
|-------------------------------- |  | ----------------------------------------------------------------------------- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|                                 |  |                                                                               |  | S.A. de C.V. and Janel, S.A. de C.V.                                                                                                                                                                                                                                                                                                                                                                                        
|                                 |  | Other directorships:                                                          |  | Member of the board of directors of Banco Inbursa, S.A., Seguros Inbursa, S.A.B. de C.V., Grupo Carso, S.A.B. de C.V., Carso Global Telecom, S.A. de C.V. and Impulsora del
Desarrollo y el Empleo en América Latina S.A.B. de C.V.                                                                                                                                                                                         
|                                 |  |                                                                              
|Ángel Losada Moreno              |  | Born:                                                                         |  | 1955                                                                                                                                                                                                                                                                                                                                                                                                                        
|Director                         |  | First elected:                                                                |  | 1991                                                                                                                                                                                                                                                                                                                                                                                                                        
|                                 |  | Term expires:                                                                 |  | 2013                                                                                                                                                                                                                                                                                                                                                                                                                        
|                                 |  | Principal occupation:                                                         |  | Chairman of the board of directors and Chief Executive Officer of Grupo Gigante, S.A.B. de C.V.                                                                                                                                                                                                                                                                                                                             
|                                 |  | Other directorships: Business
experience:                                     |  | Chairman of the board of directors of Controempresas, S.A. de C.V. and member of the board of directors of Grupo Financiero
BanamexCitigroup, S.A. de C.V. President of the Advisory Board of the National Association of Autoservice and Department Stores (ANTAD);
member of the board of directors of Chamber of Commerce of Mexico City, Casa de Bolsa Inverlat, S.A., Seguros América, S.A. and Food Market Institute.
|                                 |  |                                                                              
|Francisco Medina Chávez Director |  | Born: First
elected: Term expires: Principal
occupation: Other directorships: |  | 1956 2011
2013 President and Chief Executive Officer of
Grupo Fame, S.A. de C.V. Member of the board of directors of Banamex Citigroup Mexico and Aeroméxico.                                                                                                                                                                                                                                                               
|                                 |  | Business experience:                                                          |  | Director of several companies involving real estate, automobiles and financing.                                                                                                                                                                                                                                                                                                                                             
|                                 |  |                                                                              
|Juan Antonio Pérez Simón         |  | Born:                                                                         |  | 1941                                                                                                                                                                                                                                                                                                                                                                                                                        
|Vice Chairman;                   |  | First elected:                                                                |  | 1991                                                                                                                                                                                                                                                                                                                                                                                                                        
|member of the                    |  | Term expires:                                                                 |  | 2013                                                                                                                                                                                                                                                                                                                                                                                                                        
|executive committee              |  | Principal occupation and other
directorships:                                 |  | Chairman of the board of directors and member of the executive committee of Sanborn Hermanos, S.A.; member of the board of directors of
Grupo Carso, S.A.B. de C.V., Grupo Financiero Inbursa, S.A.B. de C.V., Carso Global Telecom, S.A. de C.V., Cigarros La Tabacalera Mexicana, S.A. de C.V. and Sears Roebuck de México, S.A. de C.V.                                                                                  
|                                 |  |                                                                               | 
|                                 |  |                                                                              
|Marco Antonio Slim Domit         |  | Born:                                                                         |  | 1968                                                                                                                                                                                                                                                                                                                                                                                                                        
|Director                         |  | First elected:                                                                |  | 1995                                                                                                                                                                                                                                                                                                                                                                                                                        
|                                 |  | Term expires:                                                                 |  | 2013                                                                                                                                                                                                                                                                                                                                                                                                                        
|                                 |  | Principal occupation:                                                         |  | Chairman of the board of directors and Chief Executive Officer of Grupo Financiero                                                                                                                                                                                                                                                                                                                                          



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|                                                              |  |                                                          |  |                                                                                                                                                                                                                  
|------------------------------------------------------------- |  | -------------------------------------------------------- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|                                                              |  |                                                          |  | Inbursa, S.A.B. de C.V.                                                                                                                                                                                          
|                                                              |  | Other directorships:                                     |  | Member of the board of directors of Grupo Carso, S.A.B. de C.V. and Carso Global Telecom, S.A. de C.V.                                                                                                           
|                                                              |  | Business experience:                                     |  | Various positions in the financial and commercial area at Grupo Financiero Inbursa, S.A.B. de C.V.                                                                                                               
|                                                              |  |                                                         
|Patrick Slim Domit                                            |  | Born:                                                    |  | 1969                                                                                                                                                                                                             
|Director                                                      |  | First elected:                                           |  | 1999                                                                                                                                                                                                             
|                                                              |  | Term expires:                                            |  | 2013                                                                                                                                                                                                             
|                                                              |  | Principal occupation:                                    |  | Co-Chairman of the board of directors of América Móvil, S.A.B. de C.V. and Chief Commercial Officer of Teléfonos de México, S.A.B. de
C.V.                                                                       
|                                                              |  | Other directorships:                                     |  | Vice President of the board of directors of Grupo Carso, S.A.B. de C.V. and member of the board of Impulsora del Desarrollo y el Empleo de América Latina, S.A.B. de C.V. and
Carso Global Telecom S.A. de C.V.  
|                                                              |  | Business experience:                                     |  | Chief Executive Officer of Industrias Nacobre, S.A. de C.V. and Chief Executive Officer of Proveedora Inbursa, S.A. de C.V.                                                                                      
|                                                              |  |                                                         
|Héctor Slim Seade Director; member of the executive committee |  | Born: First
elected: Term expires: Principal
occupation: |  | 1963 2007
2013 Chief Executive Officer of Teléfonos
de México, S.A.B. de C.V.                                                                                                                                    
|                                                              |  | Other directorships:                                     |  | Member of the board of directors of Grupo Financiero Inbursa, S.A.B. de C.V.                                                                                                                                     
|                                                              |  | Business experience:                                     |  | Director of Operations Support of Teléfonos de México, S.A.B. de C.V.; Chief Executive Officer of Fianzas Guardiana Inbursa, S.A. and Administrative Officer of Banco
Inbursa, S.A.                              
|                                                              |  |                                                         
|Fernando Solana Morales Director                              |  | Born: First
elected: Term expires: Principal
occupation: |  | 1931 2011
2013 President of the Mexican Board of
International Affairs; President of the Mexican Fund for Education and Development; President of Solana Advisers; member of the board of directors of Analítica.
|                                                              |  | Other directorships:                                     |  | Member of the board of directors of banks, industrial enterprises, universities, philanthropic and cultural organizations.                                                                                       
|                                                              |  | Business experience:                                     |  | Member of the Mexican Senate; Chief Executive Officer of Banco Nacional de México, S.A.; Secretary to the Mexican Ministry of International Affairs; Ministry of Education;
Ministry of Commerce.                



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|                                                             |  |                                                                               |  |                                                                                                                                                                                                                                                                                   
|------------------------------------------------------------ |  | ----------------------------------------------------------------------------- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Michael J. Viola Director; member of the executive committee |  | Born: First
elected: Term expires: Principal
occupation: Business experience: |  | 1954 2009
2013 Senior Vice President-Finance of AT&T,
Inc. Various positions at AT&T, Inc. since 2000. Director of the board of América Móvil, S.A.B. de C.V.                                                                                                                     
|                                                             |  |                                                                              
|Jeef McElfresh                                               |  | Born:                                                                         |  | 1970                                                                                                                                                                                                                                                                              
|Director; alternate member                                   |  | First elected:                                                                |  | 2012                                                                                                                                                                                                                                                                              
|of the executive committee                                   |  | Term expires:                                                                 |  | 2013                                                                                                                                                                                                                                                                              
|                                                             |  | Principal occupation:                                                         |  | President of AT&T Mexico, Inc.                                                                                                                                                                                                                                                    
|                                                             |  | Business experience:                                                          |  | International Business, Telecom Operations and Technology.                                                                                                                                                                                                                        
|                                                             |  |                                                                              
|Rafael Moisés Kalach Mizrahi                                 |  | Born:                                                                         |  | 1946                                                                                                                                                                                                                                                                              
|Director; chairman of the audit                              |  | First elected:                                                                |  | 1995                                                                                                                                                                                                                                                                              
|and corporate practices committee                            |  | Term expires:                                                                 |  | 2013                                                                                                                                                                                                                                                                              
|                                                             |  | Principal occupation:                                                         |  | Chairman of the board of directors and Chief Executive Officer of Grupo Kaltex, S.A. de C.V., Chairman of the board of directors of Coltejer, S.A.                                                                                                                                
|                                                             |  | Other directorships:                                                          |  | Member of the board of directors of Grupo Carso, S.A.B. de C.V., Sears Roebuck, S.A. de C.V.                                                                                                                                                                                      
|                                                             |  | Business experience:                                                          |  | Member of the board of directors of Banco Nacional de México and Bursamex Casa de Bolsa.                                                                                                                                                                                          
|                                                             |  |                                                                              
|Ricardo Martín Bringas                                       |  | Born:                                                                         |  | 1960                                                                                                                                                                                                                                                                              
|Director                                                     |  | First elected:                                                                |  | 1998                                                                                                                                                                                                                                                                              
|                                                             |  | Term expires:                                                                 |  | 2013                                                                                                                                                                                                                                                                              
|                                                             |  | Principal occupation:                                                         |  | Chief Executive Officer of Organización Soriana, S.A.B. de C.V.                                                                                                                                                                                                                   
|                                                             |  | Other directorships:                                                          |  | Member of the board of directors of Banco HSBC México, S.A., Grupo Financiero BanamexAccival, S.A. de C.V., Grupo Financiero Banorte, S.A.B. de C.V. and ING de
México; Vitro S.A.B. de C.V., Aeroméxico S.A. de C.V. and member of Consejo Mexicano de Hombres de Negocios, A.C.
|                                                             |  | Business experience:                                                          |  | Various positions in the management and financial area at various companies, including Organización Soriana, La Ciudad de París and Restaurantes
Martins.                                                                                                                        



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The alternate directors elected at the annual ordinary general meeting of our shareholders
held on April 25, 2012, each of whom serves a one-year term, are as follows:



|                         |  |                                            
|------------------------ |  | -------------------------------------------
|                         |  | First Elected Directoror Alternate Director
|Antonio Cosío Pando      |  | 2002                                       
|Marcos Franco Hernaiz    |  | 2009                                       
|Jaime Alverde Goya       |  | 1993                                       
|Eduardo Valdés Acra      |  | 2000                                       
|Oscar Von Hauske Solís   |  | 2007                                       
|Jorge A. Chapa Salazar   |  | 2002                                       
|Jorge C. Esteve Recolons |  | 2004                                       

The Secretary of the Board of Directors is Sergio F. Medina Noriega.

Of our directors and alternate directors, Marcos Franco Hernaiz is the nephew of Elmer Franco Macías; Antonio Cosío Pando
is the son of Antonio Cosío Ariño; Carlos Slim Domit, Marco Antonio Slim Domit and Patrick Slim Domit are sons of Carlos Slim Helú; and Héctor Slim Seade is the nephew of Carlos Slim Helú.

Executive Committee

Our
bylaws provide that the executive committee may generally exercise the powers of the Board of Directors. The Board of Directors is also required to consult the executive committee before deciding on certain matters set forth in the bylaws, and the
executive committee must provide its views within 10 calendar days following a request from the Board of Directors.

The
executive committee is elected from among the directors and alternate directors by a majority vote of the AA Shares and A Shares voting together. The majority of its members must be of Mexican nationality and elected by Mexican shareholders. The
current members of the executive committee are Carlos Slim Domit, Juan Antonio Pérez Simón, Héctor Slim Seade and Michael J. Viola, all nominated by Carso Global Telecom. The current alternate members of the executive committee
are Oscar Von Hauske Solís, Antonio Cosío Ariño, Daniel Hajj Aboumrad and Jeff McElfresh, all nominated by Carso Global Telecom. The current members and alternate members of the executive committee were appointed at the annual
ordinary general meeting of shareholders held on April 25, 2012.

Audit and Corporate Practices Committee

The audit and corporate practices committee appointed at the annual ordinary general meeting of shareholders held on April 25
2012, consists of Rafael Kalach M. (the audit and corporate practices committees chairman), Antonio Cosío Ariño, José Kuri Harfush, all three of whom are directors, and Antonio Cosío Pando, who is an alternate
member of the committee. Each member and alternate member of the audit and corporate practices committee qualifies as independent, as determined by our shareholders at their annual ordinary general meeting pursuant to the Mexican Securities Market
Law, and also meets the independence requirements of Rule 10A-3 under the U.S. Securities Exchange Act of 1934, as amended, or the Exchange Act. See Item 16A. Audit Committee Financial Expert. The audit and corporate
practices committee operates under a written charter approved by our Board of Directors.

The mandate of the audit and
corporate practices committee is to oversee that proper procedures and controls have been established and ensure that the financial information is useful, proper, reliable and accurately reflects our financial position. The mandate of our audit and
corporate practices committee includes the following functions, among others:



| |  |  | seek the opinion of independent experts and other advisors when required or deemed necessary;
| | - |  | ---------------------------------------------------------------------------------------------



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| |  |  | call a shareholders meeting and request the inclusion of matters it considers appropriate on the agenda;
| | - |  | ---------------------------------------------------------------------------------------------------------



| |  |  | assist the Board of Directors in the preparation of the reports required by the Mexican Securities Market Law regarding our principal accounting and
financial information policies and criteria, and the Board of Directors activities and operations;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | give an opinion to the Board of Directors with respect to matters assigned to it under the Mexican Securities Market Law, including: (a) our
internal control and internal audit guidelines, (b) our accounting policies by reference to financial reporting standards, (c) our financial statements, (d) the appointment of our external auditors, and (e) transactions that
either are outside the ordinary course of our business or, in relation to the results for the immediately preceding fiscal quarter, in any of the following cases: (i) the acquisition or disposition of assets or (ii) the provision of
guarantees or the assumption of liabilities, in each case, equal to or greater than 5% of our consolidated assets;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | evaluate, analyze and supervise the work performed by our external auditors, including (a) review with them our annual and interim financial
statements; (b) approve non-audit services provided by them; (c) resolve any disagreements between them and management; and (d) ensure their independence and objectivity;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | discuss our financial statements with the persons responsible for their preparation and review and issue a recommendation to the Board of Directors
with respect to committees approval thereof;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | inform the Board of Directors of the status of our internal control and internal audit system, including any detected irregularities;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------



| |  |  | prepare the opinion required by the Mexican Securities Market Law with respect to the annual report of our chief executive officer and submit it to our
Board of Directors, for subsequent presentation at the shareholders meeting;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | investigate possible violations of operational guidelines and policies or of the internal control, internal audit and accounting records system by
examining the documentation, records and other evidence deemed necessary;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | request periodic meetings with management and any information related to our internal control and internal audit;
| | - |  | -----------------------------------------------------------------------------------------------------------------



| |  |  | report to the Board of Directors on any detected significant irregularities and on its activities in general, propose corrective actions, and conduct
an annual self-evaluation;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | receive from our external auditors a report that includes an analysis of: (a) all critical accounting policies utilized by us; (b) all
policies and financial reporting standards that differ from those utilized by us and that have been discussed with management, including the implications of using such policies and practices; and (c) any other written communications regarding
significant matters between our external auditors and management, including the annual letter to management, in which our external auditors summarize their recommendations regarding our internal controls and the non-adjusted differences in inventory
identified during the audit process;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | establish procedures for receiving, retaining and addressing complaints regarding our accounting, internal control and audit matters, including
procedures for confidential submission of such complaints;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | set aside times during meetings for discussions and deliberations, and establish a schedule for meeting with the head of our internal audit department
and with our external auditors, without the presence of the chief executive officer and other executive officers;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | review and analyze with management and our external auditors the annual report and the quarterly financial results presented to the SEC;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------



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| |  |  | oversee that the chief executive officer executes the resolutions adopted by our shareholders or by the Board of Directors;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------



| |  |  | oversee the establishment of mechanisms and internal controls that allow to verify that our actions and operations comply with applicable rules, as
well as implement methodologies that allow review of the fulfillment of the foregoing function;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | assist the Board of Directors in monitoring the principal risks to which we are exposed, as identified on the basis of the information presented by the
committees of our Board of Directors, our chief executive officer and our External Auditors, as well as in monitoring our accounting, internal control, internal audit, records, archive and information systems;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | inform the Board of Directors of the activities performed by the audit committee;
| | - |  | ---------------------------------------------------------------------------------



| |  |  | perform any other functions pursuant to its mandate or expressly conferred by our shareholders or the Board of Directors;
| | - |  | -------------------------------------------------------------------------------------------------------------------------



| |  |  | give an opinion to the Board of Directors with respect to matters assigned to it under the Mexican Securities Market Law, including: (a) the
policies and guidelines for the use of our assets, including by related parties; (b) the policies and guidelines applicable to related party transactions; (c) the appointment, election or dismissal and the compensation of the chief
executive officer, and the policies relating to the appointment and compensation of senior management; (d) policies for the authorization of loans or guarantees to related parties; and (e) exemptions for directors and members of management
to participate in business opportunities that belong to us or to entities over which we have a significant influence; and
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | perform any other functions pursuant to its mandate or expressly conferred by our shareholders or the Board of Directors.
| | - |  | -------------------------------------------------------------------------------------------------------------------------

On April 25, 2012, the audit committee at the time in office reviewed this annual report, as well as our consolidated financial
statements and notes thereto, and recommended that such financial statements be included herein.

Executive Officers

The names, responsibilities and prior business experience of our executive officers are as follows:



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|                                                               |  |                      |  |                                                                                                                                                                                    
|-------------------------------------------------------------- |  | -------------------- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Héctor Slim Seade                                              |  | Appointed:           |  | 2006                                                                                                                                                                               
|Chief Executive Officer                                        |  | Business experience: |  | Director of Operations Support of Teléfonos de México, S.A.B. de C.V.; Chief Executive Officer of Fianzas Guardiana Inbursa, S.A.; Administrative Officer of Banco
Inbursa, S.A.   
|                                                               |  |                     
|Carlos Fernando Robles Miaja                                   |  | Appointed:           |  | 2011                                                                                                                                                                               
|Chief Financial Officer                                        |  | Business experience: |  | Various positions in finance at Teléfonos de México, S.A.B. de C.V., including budget, financial evaluation and treasurer.                                                         
|                                                               |  |                     
|Arturo Elias Ayub                                              |  | Appointed:           |  | 2002                                                                                                                                                                               
|Communication, Institutional Relations and Strategic Alliances |  | Business experience: |  | Chief Executive Officer of Sociedad Comercial Cadena and various positions at Teléfonos de México, S.A.B. de C.V., including Director of New Services, Regulation and
Communication
|                                                               |  |                     
|Javier Mondragón Alarcón                                       |  | Appointed:           |  | 1999                                                                                                                                                                               
|Regulation and Legal Affairs                                   |  | Business experience: |  | General Counsel at Grupo Televisa S.A. de C.V.; executive vice president at Grupo Televicentro                                                                                     
|                                                               |  |                     
|Sergio Medina Noriega                                          |  | Appointed:           |  | 1995                                                                                                                                                                               
|Legal                                                          |  | Business experience: |  | Various legal positions at Bancomer, S.A. (now BBVA Bancomer, S.A.); legal director of Empresas Frisco                                                                             

Héctor Slim Seade is the nephew of Carlos Slim Helú, and Arturo Elias Ayub is the
son-in-law of Carlos Slim Helú.

Compensation of Directors and Officers

For the year ended December 31, 2011, the aggregate compensation of all of our directors and executive officers paid for services in
all capacities was approximately P.52.3 million, which included bonus payments totaling P.11.2 million. Annual bonus payments are approved by our corporate practices committee on the basis of various factors, including achievement of performance
targets and seniority. Each director received an average fee of P.56.7 thousand for each meeting of the Board of Directors attended in 2011. Members of committees of the Board of Directors received an average fee of P.20.4 thousand for each
committee meeting attended in 2011. None of our directors is a party to any contract with us or any of our subsidiaries that provides for benefits upon termination of employment. We do not provide pension, retirement or similar benefits to our
directors in their capacity as directors. Our executive officers are eligible for benefits on the same terms as all other Telmex employees, and we do not separately set aside, accrue or determine the amount of our costs that is attributable to
executive officers.



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##### Table of Contents

Share ownership of Carlos Slim Helú and certain members of his immediate family is
set forth in Item 7. Major Shareholders and Related Party TransactionsMajor Shareholders. Excluding the individuals discussed therein, our directors, alternate directors and executive officers as a group beneficially own less than
1% of any class of our capital stock.

Employees

The number of our employees at the end of period was 51,077, 52,062 and 52,946 in 2011, 2010 and 2009 respectively.

At December 31, 2011, 74.2% of our employees were represented by the Telephone Workers Union of Mexico (known by its Spanish acronym, STRM) and 6.5% were represented by other unions. All
management positions are held by non-union employees. Salaries and certain benefits for unionized personnel are renegotiated every year and the collective bargaining agreements with our unionized employees are renegotiated every two years. We have
good relations with the STRM.



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##### Table of Contents

|Item 7. | Major Shareholders and Related Party Transactions
|------- | -------------------------------------------------

MAJOR SHAREHOLDERS

The AA Shares represented
43.5% of the total capital stock and 95.6% of the full voting shares (AA shares and A Shares) as of March 29, 2012. All of the AA Shares are owned directly and indirectly by América Móvil. América Móvil may be deemed
to control us. According to reports of beneficial ownership of our shares filed with the SEC, América Móvil may be deemed to be controlled by Mr. Carlos Slim Helú and members of his immediate family.

The following table identifies each owner of five percent or more of any class of our shares as of March 29, 2012, unless otherwise
indicated. Except as described below, we are not aware of any holder of five percent or more of any class of our shares. Holders of five percent or more of any class of our shares have the same voting rights with respect to their shares as do
holders of less than five percent of the same class.



|                                 |  |                  |         |  |                 |  |       |                  |  |  |                            |  |  |                  |      |   |                 |  |         |  |  |  |      |   |  |  |      |  
|-------------------------------- |  | ---------------- | ------- |  | --------------- |  | ----- | ---------------- |  |  | -------------------------- |  |  | ---------------- | ---- | - | --------------- |  | ------- |  |  |  | ---- | - |  |  | ---- | -
|                                 |  | AA Shares(1)(6)  |         |  | A Shares(2)     |  |       | L Shares(3)      |  |  | Percentof 
votingshares(4) | 
|                                 |  | Shares(millions) |         |  | Percentof class |  |       | Shares(millions) |  |  | Percentof class            |  |  | Shares(millions) |      |   | Percentof class |  |        
|América Móvil, S.A.B. de C.V.(5) |  |                  | 7,839.6 |  |                 |  | 100.0 | %                |  |  | 184.2                      |  |  |                  | 50.9 | % |                 |  | 9,497.3 |  |  |  | 96.6 | % |  |  | 97.8 | %



|(1) | As of March 29, 2012, there were 7,840 million AA Shares outstanding, representing 95.6% of the total full voting shares (AA Shares and A Shares).
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | As of March 29, 2012, there were 362 million A Shares outstanding, representing 4.4% of the total full voting shares (AA Shares and A Shares).
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------

|(3) | As of March 29, 2012, there were 9,828 million L Shares outstanding.
|--- | --------------------------------------------------------------------

|(4) | AA Shares and A Shares.
|--- | -----------------------

|(5) | Holders of AA Shares and A Shares are entitled to convert a portion of these Shares to L Shares, subject to the restrictions set forth in our bylaws. Additional
InformationBylaws and Mexican Law.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(6) | On November 14, 2011, AT&T International informed to the SEC through its 13D report, that it had sold its total participation, at that date AT&T
International participation represented the 8.46% of our capital stock.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Our directors, Carlos Slim Domit, Marco
Antonio Slim Domit and Patrick Slim Domit, together with certain other members of Carlos Slim Helús immediate family, are the controlling shareholders of América Móvil.

As of December 31, 2011, we had no information concerning holders with registered addresses in the United States that hold:



| |  |  | A Shares not represented by ADSs;
| | - |  | ---------------------------------



| |  |  | L Shares not represented by ADSs; or
| | - |  | ------------------------------------



| |  |  | A Share ADSs that are held under the unsponsored A Share ADS programs, which pre-date the establishment of the sponsored program in 2000, and have not
been exchanged for ADSs issued under such sponsored program. SeeItem 9. The Offer and ListingTrading Market.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Upon termination of our ADR program on January 30, 2012, there were no outstanding L Share ADSs or A Share ADSs or holders thereof.

We purchase our shares on the Mexican Stock Exchange from time to time up to a specified maximum aggregate value authorized by the
holders of AA Shares and A Shares and our Board of Directors. In 2011, we purchased 128.5 million L Shares, representing 0.71% of the shares outstanding at the beginning of 2011, with an aggregate value of P.1,359 million.



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Since January 1, 1997, Carso Global Telecom and subsequently América
Móvil have purchased A Shares and L Shares on the open market from time to time. Our ownership has been changing in recent years as América Móvil has been directly and indirectly acquiring a greater percentage of our capital
stock through public exchange and tender offers. In percentage terms, the ownership position of América Móvil has also increased as a result of our repurchase of our own shares. Carlos Slim Domit, Marco Antonio Slim Domit and Patrick
Slim Domit, together with certain other members of Carlos Slim Helús immediate family, were collectively the beneficial owners of 50.3%, 24.0% and 23.3% of A shares on December 31, 2011, December 31, 2010, and
December 31, 2009, respectively. These three directors were also collectively the beneficial owners of 96.7%, 47.5%, and 48.7% of L Shares on December 31, 2011, December 31, 2010 and December 31, 2009, respectively.



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RELATED PARTY TRANSACTIONS

General

We engage in a
variety of transactions with our affiliates in the ordinary course of business. Pursuant to Mexican law, our bylaws and applicable internal guidelines, provided that the corporate practices committee of our Board of Directors has opined favorably,
our Board of Directors has to vote on whether or not to approve any transaction with a related party when such transaction (1) has a value which exceeds 1% of our consolidated assets; (2) is outside the ordinary course of our business or
is not at market prices; or (3) is with employees, on terms that are different from those that would be obtained in dealings with an unrelated party and it does not qualify as employee benefits of a general character. A director with an
interest in a transaction with a related party is not permitted to vote on its approval.

We engage in transactions with
entities that, like us, are controlled, directly or indirectly, by Carlos Slim Helú and members of his immediate family. These entities include América Móvil (our controlling shareholder), Grupo Carso and Grupo Financiero
Inbursa and their respective subsidiaries. We have various operational and financing relationships with América Móvil. Transactions with Grupo Carso include the purchase of network construction, services and materials, and transactions
with Grupo Financiero Inbursa include financial services and insurance. We also have agreements with affiliates of AT&T International (a shareholder of América Móvil) that provide for the completion of calls in our respective
countries of operation. Several of the directors of our affiliates are also members of our Board of Directors. See Item 6. Directors, Senior Management and EmployeesDirectors and Notes 9, 12 and 15 to our audited consolidated financial
statements.

The aggregate amount of our purchases from affiliates was P.12,916 million in 2011, and P.13,626 million in 2010.
The aggregate amount of our sales to these affiliates was P.7,128 million in 2011 and P.7,407 million in 2010. We believe that these transactions are at market prices. See Note 15 to our audited consolidated financial statements.

From time to time we make investments together with affiliates, sell our investments to affiliates and buy investments from affiliates.
Some of these transactions are described below.



| |  |  | In January 2006, together with Alcatel and AT&T International, we acquired an aggregate 51% interest in the capital stock of 2Wire.
Subsequently, in December 2006, we sold an approximate 5.5% in 2Wire to AT&T International, decreasing our ownership to approximately 13.0%. We sold our remaining ownership in 2Wire to Pace Plc in October 2010.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | We own a 45% interest in Grupo Telvista, S.A. de C.V. together with América Móvil (45%) and Grupo Carso (10%).
| | - |  | --------------------------------------------------------------------------------------------------------------

In previous years we also paid fees to Carso Global Telecom and AT&T Mexico, Inc. for consulting and
management services, pursuant to agreements with each party negotiated on behalf of us by a special committee of directors unaffiliated with any of the parties. We paid an aggregate amount of U.S.$12.5 million in 2010 and U.S.$22.5 million in 2009.
The agreement with Carso Global Telecom was renewed for 2010 on substantially similar terms to the prior agreement and with an agreed upon fee of U.S.$22.5 million. We agreed to terminate the agreement with Carso Global Telecom in July 2010 and we
paid U.S.$11.3 million through such date. In December 2010, we also agreed to terminate our consulting and management services agreement with AT&T Mexico, Inc.

Our corporate practices committee has established policies governing the use of our corporate aircraft. For security reasons and due to the various activities related to their positions, the corporate
practices committee allocates an annual amount of time for personal use free of charge to the honorary chairman and the chairman of our Board of Directors and to the chief executive officer. Certain executives of our affiliates periodically use our
corporate aircraft in accordance with those policies.



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Transactions with América Móvil and its subsidiaries

América Móvil, our controlling shareholder, has a variety of contractual relationships with us and with our subsidiaries.
Because both we and América Móvil provide telecommunications services in different geographical markets, including México, we maintain operational relationships. These include interconnection between our respective networks and
the completion of international traffic in each others countries of operation; use by América Móvil of our private circuits; our provision of long-distance service to América Móvils customers; use of
facilities, particularly for the co-location of equipment on premises we own; and use by each of the services provided by the other. These operational relationships are subject to a variety of agreements and to specific regulations governing all
telecommunications operators. Interconnection fees represent the largest component of amounts paid under these agreements. In addition, we distribute América Móvils handsets and prepaid cards in our stores. The terms of the
arrangements with América Móvil are generally similar to those on which each company does business with other, unaffiliated parties.

In February 2011, América Móvil offered to acquire from eligible bondholders our 5.5% senior notes due 2015 and our 5.5% senior notes due 2019 in exchange for new debt securities of
América Móvil. As a result, in March 2011, América Móvil acquired U.S.$243.6 million of senior notes due 2015 and U.S.$122.6 million of senior notes due 2019. We purchased from América Móvil all the notes
that América Móvil acquired in the exchange offer for an aggregate price of U.S.$394 million, which represents a premium of U.S.$27.8 million over par, and we extinguished those senior notes. The price we paid was based on the market
value of the América Móvil notes issued in the exchange offer.

In addition, we have loan agreements with
América Móvil and we may continue to receive financing from América Móvil. See Note 9 to our audited consolidated financial statements.

We also have various operational agreements with Telmex Internacional, which was acquired by América Móvil in 2010. The terms of our arrangements with Telmex Internacional are generally
similar to those on which each company does business with other, unaffiliated parties. These ongoing relationships include interconnection between our respective networks and the completion of international traffic in each others countries of
operation. Additionally, Telmex Internacional prints our white pages telephone directories and we provide Telmex Internacional access to our customer database for use in its yellow pages directory business in Mexico and handle the billing and
collection of payments from advertisers. Telmex also provides Telmex Internacional with a variety of administrative services, including certain data processing and corporate support and administrative services, generally at cost plus a specified
percentage.

International Long-distance Settlement with AT&T Corp

We have agreements with AT&T Corp, an affiliate of AT&T International, a shareholder of América Móvil. AT&T Corp
completes our international calls to the United States and we complete AT&T Corps calls from the United States. The prices of payment under our agreements are consistent with the prices that we have agreed upon with other international
carriers.



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|Item 8. | Financial Information
|------- | ---------------------

CONSOLIDATED FINANCIAL STATEMENTS

See Item 18. Financial Statements and our consolidated financial statements beginning on page F-1. Since the date of the
financial statements, no significant event has occurred that would affect the amounts recognized or disclosures made in those financial statements.

LEGAL PROCEEDINGS

We are involved in legal
proceedings in the ordinary course of our business and other proceedings with local tax authorities, none of which is material. In addition, we are subject to, and in some cases in the process of appealing various proceedings brought by our
competitors alleging monopolistic practices by us before competition authorities in Mexico.

In 2007, Cofeco began four
industry-wide investigations into monopolistic practices. Two of these investigations were closed due to lack of evidence, while one resulted in a notice of probable fault, and one in Cofecos determination that Telmex engaged in alleged
monopolistic practices. We will object to the notice of probable fault in due course, and have filed a petition for relief against the resolution. Also in 2007 Cofeco initiated four examinations with respect to Telmexs market power, and issued
final resolutions that Telmex and Telnor have substantial market power in all four of the markets investigated. In response, Telmex and Telnor filed petitions for relief in all four cases. While two of the petitions are still pending, the courts
have rejected the remaining two. Based on these final resolutions, the regulatory authorities could impose specific price requirements or other special regulations such as additional requirements regarding disclosure of information or quality of
service on us. See Item 4. Information on the CompanyRegulationRegulatory Initiatives Relating to Competition and Note 14 to our audited consolidated financial statements.

In November 2005, Cofetel issued guidelines for making changes to local service areas, including the consolidation of such local service
areas. We are currently challenging the legality of the underlying guidelines before the Third Metropolitan Regional Federal Court of Justice for Tax and Administrative Matters. In addition, in November 2009, a federal court nullified various
resolutions that Cofetel had issued under these guidelines to consolidate a number of our local service areas. See Item 4. Information on the CompanyRegulationConsolidation of Local Service Areas and Note 14 to our audited
consolidated financial statements.

In February 2009, Cofetel published the Fundamental Technical Plan which requires
operators with the greatest number of access points to provide other operators with access to our network on an unbundled basis that disaggregates the prices for different service elements. In October 2009, Cofetel issued two resolutions
determining that we and Telnor are operators with the largest number of access points in our respective concession coverage areas. We have filed petitions for constitutional protection against the Fundamental Technical Plan and these resolutions,
which are pending. Telnor has been granted constitutional protection against the Fundamental Technical Plan, thereby rendering ineffective any actions against Telnor that are based on the Fundamental Technical Plan. See Item 4. Information
on the CompanyRegulationInterconnection and Note 14 to our audited consolidated financial statements.

In June
2011, Cofetel notified Telmex and Telnor of some resolutions mandating reductions to the interconnection prices that Telmex and Telnor charges other telecommunications providers. Specifically, Cofetels resolutions reduced interconnection fees
by 65% and redefined the legal nature of transport of long distance service (resale) that the Company provides other competitors, established a fee of P.4.53 cents per minute, a reduction of 94% from the previous price of P.75 cents per minute.
Telmex and Telnor have filed petitions to challenge these resolutions. The outcome of these appeals is still pending.



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DIVIDENDS

We have paid cash dividends on our shares each year since 1958. The table below sets forth the nominal amount of dividends paid per share
in each year indicated, in pesos and translated into U.S. dollars at the exchange rate on each of the respective payment dates.



|                       |  |                |          |  |                  |       |        | 
|---------------------- |  | -------------- | -------- |  | ---------------- | ----- | ------ | 
|Year endedDecember 31, |  | Pesos perShare |          |  | Dollars perShare |      
|2011                   |  |                | P.0.5375 |  |                  | U.S.$ | 0.0425 | 
|2010                   |  |                | 0.4900   |  |                  |       | 0.0391 | 

The dividends from earnings in a given year are determined at the annual meeting of shareholders in April
of the following year. On April 29, 2010, we declared a dividend of P.0.50 per share, which was paid in equal installments of P.0.1250 per share in June 2010, September 2010, December 2010 and March 2011. In April 2011, we declared a
dividend of P.0.55 per share, which was paid in equal installments of P.0.1375 per share in June 2011, September 2011, December 2011 and March 2012. In April 2012, we declared a dividend of P.0.55 per share, which will be payable in one
installment on or after December 19, 2012.

The declaration, amount and payment of dividends are determined by majority
vote of the holders of AA Shares and A Shares, generally on the recommendation of the Board of Directors, and will depend on our results of operations, financial condition, cash requirements, future prospects and other factors deemed relevant by the
holders of AA Shares and A Shares. Accordingly, we cannot assure you that we will continue to pay dividends or that future dividends will be comparable to historical dividends. Our bylaws do not distinguish among holders of the AA Shares, the A
Shares and the L Shares with respect to dividend payments and other distributions.



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|Item 9. | The Offer and Listing
|------- | ---------------------

TRADING MARKET

On December 19, 2011, at Telmexs extraordinary shareholders meeting, the decision was approved to delist the Companys ADSs from the NYSE and NASDAQ, as well as its L Shares from
Latibex, and to terminate its ADR programs. On January 31, 2012, Telmex filed Form 25 with the SEC, after which Telmexs ADSs were no longer traded on the NYSE and NASDAQ. On the same date, Telmex L shares were no longer traded on Latibex.
While Telmex shares continue to be traded on the Mexican Stock Exchange, the Company plans to both delist its shares from the Mexican Stock Exchange and deregister them from the National Securities Registry during the second half of 2012.

In accordance with the deposit agreements, JPMorgan as depositary, provided 30 days notice of termination to all
holders of ADRs before the termination became effective on January 30, 2012. Holders were entitled to surrender their ADRs for cancellation and receive the underlying shares. After 30 days following the termination of the ADR programs, JPMorgan
began liquidating the shares underlying the unclaimed ADRs. JP Morgan will hold the cash proceeds from the sale of the shares uninvested for delivery to a holder against surrender of the ADR.

The L Share ADSs each represented 20 L Shares of Telmex and were issued by JPMorgan Chase Bank, N.A. (JP Morgan), as
depositary for the L Share ADSs. The L Share ADSs were traded on the NYSE and the L Shares are traded on the Mexican Stock Exchange and were listed on Latibex in Madrid, Spain.

The A Share ADSs, each represented 20 A Shares of Telmex were issued by the JPMorgan, as depositary for the A Share ADSs. The A Shares
are traded on the Mexican Stock Exchange and the A Share ADSs were traded on the NASDAQ Capital Market.

The following table
sets forth, for the periods indicated, the reported high and low sales prices for the L Shares on the Mexican Stock Exchange and for the L Share ADSs on the NYSE. On January 30, 2012, the last day of trading of the L Share ADSs on the NYSE, the
closing price of the L Share ADSs on the NYSE was U.S.$ 15.33. On April 25, 2012, the closing price of the L Shares on the Mexican Stock Exchange was P.10.10.



|                         |  |                        |         |  |                                |  |         |      |  |       |       |  |  |       |       | 
|------------------------ |  | ---------------------- | ------- |  | ------------------------------ |  | ------- | ---- |  | ----- | ----- |  |  | ----- | ----- | 
|                         |  | Mexican Stock Exchange |         |  | NYSE                           | 
|                         |  | (pesos per L Share)    |         |  | (U.S. dollars per L Share ADS) | 
|                         |  | High                   |         |  | Low                            |  |         | High |  |       | Low   | 
|Annual highs and lows    |  |                        |         |  |                                |  |         |      |  |       |       |  |  |       |       | 
|2007(1)                  |  |                        | P.23.29 |  |                                |  | P.14.32 |      |  | U.S.$ | 43.26 |  |  | U.S.$ | 25.89 | 
|2008(1)                  |  |                        | 22.19   |  |                                |  | 10.47   |      |  |       | 42.94 |  |  |       | 15.08 | 
|2009                     |  |                        | 14.47   |  |                                |  | 9.50    |      |  |       | 21.24 |  |  |       | 12.54 | 
|2010                     |  |                        | 11.16   |  |                                |  | 8.60    |      |  |       | 17.38 |  |  |       | 13.00 | 
|2011                     |  |                        | 11.26   |  |                                |  | 9.11    |      |  |       | 11.15 |  |  |       | 9.00  | 
|                         |  |                        |         | 
|Quarterly highs and lows |  |                        |         |  |                                |  |         |      |  |       |       |  |  |       |       | 
|2010:                    |  |                        |         |  |                                |  |         |      |  |       |       |  |  |       |       | 
|First quarter            |  |                        | P.11.16 |  |                                |  | P.9.28  |      |  | U.S.$ | 17.38 |  |  | U.S.$ | 14.77 | 
|Second quarter           |  |                        | 10.50   |  |                                |  | 8.60    |      |  |       | 16.66 |  |  |       | 13.00 | 
|Third quarter            |  |                        | 9.74    |  |                                |  | 9.01    |      |  |       | 15.41 |  |  |       | 13.82 | 
|Fourth quarter           |  |                        | 10.65   |  |                                |  | 9.10    |      |  |       | 17.19 |  |  |       | 14.71 | 
|2011:                    |  |                        |         |  |                                |  |         |      |  |       |       |  |  |       |       | 



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|                       |  |                        |         |  |                                |  |         |      |  |       |       |     |  |       |       |    
|---------------------- |  | ---------------------- | ------- |  | ------------------------------ |  | ------- | ---- |  | ----- | ----- | --- |  | ----- | ----- | ---
|                       |  | Mexican Stock Exchange |         |  | NYSE                           | 
|                       |  | (pesos per L Share)    |         |  | (U.S. dollars per L Share ADS) | 
|                       |  | High                   |         |  | Low                            |  |         | High |  |       | Low   |    
|First quarter          |  |                        | 11.14   |  |                                |  | 9.50    |      |  |       | 18.34 |     |  |       | 16.21 |    
|Second quarter         |  |                        | 11.26   |  |                                |  | 9.29    |      |  |       | 19.28 |     |  |       | 15.58 |    
|Third quarter          |  |                        | 10.73   |  |                                |  | 9.11    |      |  |       | 17.89 |     |  |       | 14.81 |    
|Fourth quarter         |  |                        | 10.50   |  |                                |  | 10.00   |      |  |       | 16.06 |     |  |       | 14.08 |    
|                       |  |                        |         | 
|2012:                  |  |                        |         |  |                                |  |         |      |  |       |       |     |  |       |       |    
|First quarter          |  |                        | 10.46   |  |                                |  | 10.00   |      |  |       | 16.29 | (2) |  |       | 14.42 | (2)
|                       |  |                        |         | 
|Monthly highs and lows |  |                        |         |  |                                |  |         |      |  |       |       |     |  |       |       |    
|2011                   |  |                        |         |  |                                |  |         |      |  |       |       |     |  |       |       |    
|October                |  |                        | P.10.50 |  |                                |  | P.10.26 |      |  | U.S.$ | 16.06 |     |  | U.S.$ | 14.50 |    
|November               |  |                        | 10.50   |  |                                |  | 10.15   |      |  |       | 15.70 |     |  |       | 14.08 |    
|December               |  |                        | 10.50   |  |                                |  | 10.00   |      |  |       | 15.31 |     |  |       | 14.22 |    
|2012                   |  |                        |         |  |                                |  |         |      |  |       |       |     |  |       |       |    
|January                |  |                        | 10.46   |  |                                |  | 10.01   |      |  |       | 16.29 |     |  |       | 14.42 |    
|February               |  |                        | 10.30   |  |                                |  | 10.00   |      |  |       |      |     |  |       |      |    
|March                  |  |                        | 10.30   |  |                                |  | 10.00   |      |  |       |      |     |  |       |      |    



|(1) | From December 26, 2007 to June 10, 2008, the L Shares and L Share ADSs of Telmex and Telmex Internacional traded together.
|--- | --------------------------------------------------------------------------------------------------------------------------

|(2) | Through January 30, 2012.
|--- | -------------------------

The table below sets forth, for the periods indicated, the reported high and low sales prices for the A Shares on the Mexican Stock
Exchange and the high and low bid prices for A Share ADSs published by NASDAQ. Bid prices published by NASDAQ for the A Share ADSs are inter-dealer quotations and may not reflect actual transactions. Following the Escisión and until
June 10, 2008, the A Shares and A Share ADSs of Telmex and Telmex Internacional traded together. On January 30, 2012, the last day of trading of the A Share ADSs on NASDAQ, the closing price of the A Share ADSs on NASDAQ was U.S.$14.03. On
April 25, 2012, the closing price of the A Shares on the Mexican Stock Exchange was P.10.10.



|                         |  |                        |         |  |                                |  |         |      |  |       |       |     |  |       |       |    
|------------------------ |  | ---------------------- | ------- |  | ------------------------------ |  | ------- | ---- |  | ----- | ----- | --- |  | ----- | ----- | ---
|                         |  | Mexican Stock Exchange |         |  | NASDAQ                         | 
|                         |  | (pesos per A Share)    |         |  | (U.S. dollars per A Share ADS) | 
|                         |  | High                   |         |  | Low                            |  |         | High |  |       | Low   |    
|Annual highs and lows    |  |                        |         |  |                                |  |         |      |  |       |       |     |  |       |       |    
|2007(1)                  |  |                        | P.22.65 |  |                                |  | P.14.30 |      |  | U.S.$ | 43.14 |     |  | U.S.$ | 25.71 |    
|2008(1)                  |  |                        | 22.15   |  |                                |  | 10.50   |      |  |       | 42.99 |     |  |       | 11.95 |    
|2009                     |  |                        | 14.20   |  |                                |  | 9.64    |      |  |       | 20.62 |     |  |       | 12.20 |    
|2010                     |  |                        | 11.00   |  |                                |  | 8.60    |      |  |       | 17.44 |     |  |       | 12.69 |    
|2011                     |  |                        | 11.15   |  |                                |  | 9.00    |      |  |       | 19.79 |     |  |       | 13.89 |    
|                         |  |                        |         | 
|Quarterly highs and lows |  |                        |         |  |                                |  |         |      |  |       |       |     |  |       |       |    
|2010:                    |  |                        |         |  |                                |  |         |      |  |       |       |     |  |       |       |    
|First quarter            |  |                        | P.11.00 |  |                                |  | P.9.21  |      |  | U.S.$ | 17.44 |     |  | U.S.$ | 14.25 |    
|Second quarter           |  |                        | 9.85    |  |                                |  | 8.60    |      |  |       | 16.44 |     |  |       | 12.69 |    
|Third quarter            |  |                        | 9.50    |  |                                |  | 8.65    |      |  |       | 15.26 |     |  |       | 13.28 |    
|Fourth quarter           |  |                        | 10.50   |  |                                |  | 9.01    |      |  |       | 17.07 |     |  |       | 14.62 |    
|2011:                    |  |                        |         |  |                                |  |         |      |  |       |       |     |  |       |       |    
|First quarter            |  |                        | 10.91   |  |                                |  | 9.81    |      |  |       | 18.35 |     |  |       | 16.01 |    
|Second quarter           |  |                        | 11.15   |  |                                |  | 9.00    |      |  |       | 19.79 |     |  |       | 15.68 |    
|Third quarter            |  |                        | 10.50   |  |                                |  | 9.11    |      |  |       | 17.89 |     |  |       | 14.82 |    
|Fourth quarter           |  |                        | 10.50   |  |                                |  | 10.00   |      |  |       | 15.95 |     |  |       | 14.25 |    
|2012:                    |  |                        |         |  |                                |  |         |      |  |       |       |     |  |       |       |    
|First quarter            |  |                        | 11.00   |  |                                |  | 10.00   |      |  |       | 14.30 | (2) |  |       | 12.86 | (2)



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|                       |  |                        |         |  |                                |  |         |      |  |       |       |  |  |       |       | 
|---------------------- |  | ---------------------- | ------- |  | ------------------------------ |  | ------- | ---- |  | ----- | ----- |  |  | ----- | ----- | 
|                       |  | Mexican Stock Exchange |         |  | NASDAQ                         | 
|                       |  | (pesos per A Share)    |         |  | (U.S. dollars per A Share ADS) | 
|                       |  | High                   |         |  | Low                            |  |         | High |  |       | Low   | 
|Monthly highs and lows |  |                        |         |  |                                |  |         |      |  |       |       |  |  |       |       | 
|2011                   |  |                        |         |  |                                |  |         |      |  |       |       |  |  |       |       | 
|October                |  |                        | P.10.44 |  |                                |  | P.10.30 |      |  | U.S.$ | 15.95 |  |  | U.S.$ | 14.58 | 
|November               |  |                        | 10.50   |  |                                |  | 10.10   |      |  |       | 15.54 |  |  |       | 13.92 | 
|December               |  |                        | 10.17   |  |                                |  | 10.00   |      |  |       | 15.05 |  |  |       | 13.89 | 
|2012:                  |  |                        |         |  |                                |  |         |      |  |       |       |  |  |       |       | 
|January                |  |                        | 10.20   |  |                                |  | 10.00   |      |  |       | 14.30 |  |  |       | 12.86 | 
|February               |  |                        | 11.00   |  |                                |  | 10.00   |      |  |       |      |  |  |       |      | 
|March                  |  |                        | 10.35   |  |                                |  | 10.00   |      |  |       |      |  |  |       |      | 



|(1) | From December 26, 2007 to June 10, 2008, the A Shares and A Share ADSs of Telmex and Telmex Internacional traded together.
|--- | --------------------------------------------------------------------------------------------------------------------------

|(2) | Through January 30, 2012.
|--- | -------------------------



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TRADING ON THE MEXICAN STOCK EXCHANGE

The Mexican Stock Exchange, located in Mexico City, is the only stock exchange in Mexico. Founded in 1894 and in continuous operation
since 1907, it is organized as a Mexican corporation operating under a concession granted by the Ministry of Finance and Public Credit (SHCP). Trading on the Mexican Stock Exchange takes place through automated systems. Trades in securities listed
on the Mexican Stock Exchange can also be effected off the exchange. The Mexican Stock Exchange operates a system of automatic suspension of trading in shares of a particular issuer as a means of controlling excessive price volatility, but under
current regulations this system does not apply to securities such as the A Shares or the L Shares that are directly or indirectly (for example, through ADSs) quoted on a stock exchange (including for these purposes NASDAQ) outside Mexico.

Settlement is effected three business days after a share transaction on the Mexican Stock Exchange. Deferred settlement, even
by mutual agreement, is not permitted without the approval of the CNBV. Most securities traded on the Mexican Stock Exchange, including those of Telmex, are on deposit with S.D. Indeval, Institución para el Depósito de Valores, S.A. de
C.V., a privately owned securities depositary that acts as a clearinghouse for Mexican Stock Exchange transactions. However, during the extraordinary shareholders meeting held on April 25, 2012, Telmexs shareholders decided to
initiate a process to delist Telmexs shares from the Mexican Stock Exchange and to deregister them from the National Securities Registry. We expect that Telmexs shares will cease trading on the Mexican Stock Exchange during the second
half of 2012.



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|Item 10. | Additional Information
|-------- | ----------------------

BYLAWS AND MEXICAN LAW

Set forth below is a brief summary of certain significant provisions of our bylaws. This description does not purport to be complete and is qualified by reference to our bylaws, which are filed as an
exhibit to this annual report.For a description of the provisions of our bylaws relating to our Board of Directors and its committees, see Item 6. Directors, Senior Management and Employees.

Organization and Register

Telmex is a sociedad anónima bursátil de capital variable organized in Mexico under the Mexican Companies Law (Ley
General de Sociedades Mercantiles) and the Mexican Securities Market Law. It is registered with the Public Registry of Commerce of Mexico City under the number 5229.

Purpose

Our main corporate purpose is to construct, install, maintain and
operate a public telephony and telecommunications network to transmit voice, sound, data, text and images through local and domestic and international long-distance telecommunications services.

Share Capital

Our
capital stock comprises Series AA Shares, Series A Shares and Series L Shares, all such shares without par value. All of the outstanding shares are fully paid and non-assessable.

AA Shares and A Shares have full voting rights. Holders of L Shares may vote only in limited circumstances as described
underVoting Rights. The rights of holders of all series of capital stock are otherwise identical except for limitations on non-Mexican ownership of AA Shares. The AA Shares, which must always represent at least 51% of the combined AA
Shares and A Shares, may be owned only by holders that qualify as Mexican investors as defined in the Foreign Investment Law and our bylaws. SeeLimitations on Share Ownershipbelow.

Each AA Share or A Share may be exchanged at the option of the holder for one L Share, provided that the AA Shares may never represent
less than 20% of our outstanding capital stock or less than 51% of our combined AA Shares and A Shares. As of December 31, 2011, the AA Shares represented 43.5% of our outstanding capital stock and 95.5% of our combined AA Shares and A
Shares.

Each L Share is exchangeable at the option of the holder for one AA Share by delivering the L Share certificate to
our treasury for cancellation and receiving the corresponding AA Share certificate. The right to exchange is subject to limitations on non-Mexican ownership of AA Shares and to the requirement that the AA Shares and A Shares together may never
represent more than 51% of our outstanding capital stock. As of December 31, 2011, the AA Shares and A Shares together represented 45.5% of our outstanding capital stock.

Voting Rights

Each AA Share and A Share entitles the holder thereof to one
vote at any meeting of our shareholders. Each L Share entitles the holder to one vote at any meeting at which holders of L Shares are entitled to vote. Holders of L Shares are entitled to vote only to elect two members of the Board of Directors and
the corresponding alternate directors and on the following matters:



| |  |  | the transformation of Telmex from one type of company to another;
| | - |  | -----------------------------------------------------------------



| |  |  | any merger in which Telmex is not the surviving entity or any merger with an entity whose principal corporate purposes are different from those of
Telmex (when Telmex is the surviving entity); and
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| |  |  | cancellation of the registration of Telmex on the Mexican National Registry of Securities and any foreign stock exchange on which they are registered.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------

A resolution on any of the specified matters requires the affirmative vote of both a majority of all
outstanding shares and a majority of the AA Shares and the A Shares voting together.

Under Mexican law, holders of shares of
any series are also entitled to vote as a class on any action that would affect the rights of holders of shares of such series. Additionally, holders of 20% or more of all outstanding shares would be entitled to request judicial relief against any
such action taken without such a vote. The determination whether an action requires a class vote on these grounds would initially be made by the Board of Directors or any other party calling for shareholder action. A negative determination could be
subject to judicial challenge by an affected shareholder, and a court would ultimately determine the necessity for a class vote. There are no other procedures for determining whether a proposed shareholder action requires a class vote, and Mexican
law does not provide extensive guidance on the criteria to be applied in making such a determination.

Shareholders Meetings

General shareholders meetings may be ordinary meetings or extraordinary meetings. Extraordinary general meetings are
those called to consider certain matters specified in Article 182 of the Mexican Companies Law, including, principally, amendments of the bylaws, liquidation, merger, and transformation from one type of company to another, as well as to consider the
removal of our shares from listing on the Mexican Stock Exchange or any foreign stock exchange. General meetings called to consider other matters are ordinary meetings. The two directors elected by the holders of L Shares are elected at a special
meeting of holders of L Shares. All other matters on which holders of L Shares are entitled to vote would be considered at an extraordinary general meeting. Holders of L Shares are not entitled to attend or address meetings of shareholders at which
they are not entitled to vote.

A special meeting of the holders of L Shares must be held each year for the election of
directors. An ordinary general meeting of the holders of AA Shares and A Shares must be held each year to consider the approval of the financial statements for the preceding fiscal year, to elect directors and to determine the allocation of the
profits of the preceding year.

The quorum for an ordinary general meeting of the AA Shares and A Shares is 50% of such
shares, and action may be taken by a majority of the shares present. If a quorum is not available, a second meeting may be called at which action may be taken by a majority of the AA Shares and A Shares present, regardless of the number of such
shares. Special meetings of holders of L Shares are governed by the same rules applicable to ordinary general meetings of holders of AA Shares and A Shares. The quorum for an extraordinary general meeting at which holders of L Shares may not vote is
75% of the AA shares and A Shares, and the quorum for an extraordinary general meeting at which holders of L Shares are entitled to vote is 75% of the outstanding capital stock. If a quorum is not available in either case, a second meeting may be
called and action may be taken, provided a majority of the shares entitled to vote is present. Whether on first or second call, actions at an extraordinary general meeting may be taken by a majority vote of the AA Shares and A Shares outstanding
and, on matters which holders of L Shares are entitled to vote, a majority vote of all the capital stock.

Holders of 20% of
our outstanding capital stock may have any shareholder action set aside by filing a complaint with a court of law within 15 days after the close of the meeting at which such action was taken and showing that the challenged action violates Mexican
law or our bylaws. In addition, any holder of our capital stock may bring an action at any time within five years challenging any shareholder action. Relief under these provisions is only available to holders:



| |  |  | who were entitled to vote on, or whose rights as shareholders were adversely affected by, the challenged shareholder action; and
| | - |  | --------------------------------------------------------------------------------------------------------------------------------



| |  |  | whose shares were not represented when the action was taken or, if represented, were voted against it.
| | - |  | ------------------------------------------------------------------------------------------------------



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Shareholders meetings may be called by the Board of Directors, its chairman,
co-chairman or secretary, by the committees that perform audit and corporate practices functions or their chairmen, or by a court. The Board of Directors or the committees that perform audit and corporate practices functions may be required to call
a meeting of shareholders by the holders of 10% of the outstanding capital stock. Notice of meetings must be published in the Official Gazette or a newspaper of general circulation in Mexico City at least 15 days prior to the meeting. In order to
attend a meeting, shareholders must deposit their shares with us at our office in Mexico City, with a Mexican or foreign banking institution or with a Mexican exchange broker. If so entitled to attend the meeting, a shareholder may be represented by
proxy.

Dividend Rights

At the annual ordinary general meeting of holders of AA Shares and A Shares, the Board of Directors submits our financial statements for the previous fiscal year, together with a report thereon by the
Board of Directors, to the holders of AA Shares and A Shares for approval. The holders of AA Shares and A Shares, once they have approved the financial statements, determine the allocation of our net profit for the preceding year. They are required
by law to allocate 5% of such net profit to a legal reserve, which is not thereafter available for distribution except as a stock dividend, until the amount of the legal reserve equals 20% of our capital stock. The remainder of net profit is
available for distribution.

All shares outstanding at the time a dividend or other distribution is declared are entitled to
participate in such dividend or other distribution.

Limitation on Capital Increases

Our bylaws require that any capital increase be represented by new shares of each series in proportion to the number of shares of each
series outstanding.

Preemptive Rights

In the event of a capital increase, a holder of existing shares of a given series has a preferential right to subscribe for a sufficient number of shares of the same series to maintain the holders
existing proportionate holdings of shares of that series. Preemptive rights must be exercised within 30 calendar days following the publication of notice of the capital increase in the Official Gazette and a newspaper of general circulation in
Mexico City. Under Mexican law, preemptive rights cannot be traded separately from the corresponding shares that give rise to such rights. As a result, there is no trading market for the rights in connection with a capital increase. We are not
required to take steps that may be necessary to make this possible.

Under the Mexican Securities Market Law, however, if
Telmex were to increase its capital stock to effect a public offering of newly issued shares or were to resell any repurchased shares, no preemptive rights would be available to the holders of outstanding shares as a result of the issuance or
resale. As of December 31, 2011, Telmex had 14,160 million repurchased L Shares and 42 million repurchased A Shares in its treasury.

Limitations on Share Ownership

Ownership by non-Mexicans of shares of
Mexican enterprises in certain economic sectors, including telephone services, is regulated by the Foreign Investment Law and the Regulations thereunder. The National Commission on Foreign Investment is responsible for administration of the Foreign
Investment Law and Regulations. In order to comply with restrictions on the percentage of their capital stock that may be owned by non-Mexican investors, Mexican companies typically limit particular classes of their stock to Mexican ownership. Under
the Foreign Investment Law, a trust for the benefit of one or more non-Mexican investors may qualify as Mexican if the trust meets certain conditions that will generally ensure that the non-Mexican investors do not determine how the shares are
voted.

Non-Mexican investors are not permitted to own more than 49% of the capital stock of a Mexican corporation engaged in
the telephone business. Pursuant to a decision of the Foreign Investment Commission dated August 10,



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1990, the L Shares of Telmex, because of their limited voting rights, are not taken into account in determining compliance with this restriction and, accordingly, are not subject to Mexican
ownership restrictions. The A Shares are also unrestricted. The AA Shares, however, which must always represent at least 51% of the combined AA Shares and A Shares, may be owned only by holders that qualify as Mexican investors as defined in the
Foreign Investment Law and our bylaws. A holder that acquires AA Shares in violation of the restrictions on non-Mexican ownership will have none of the rights of a shareholder with respect to those AA Shares. As a consequence of these limitations, a
non-Mexican investor cannot own AA Shares except through a trust that effectively neutralizes the votes of non-Mexican investors.

Pursuant to the Foreign Investment Law and Regulations, we have registered any foreign owner of our shares with the National Registry of Foreign Investment.

In addition, pursuant to the Foreign Investment Law and Regulations, our Mexican shareholders retain the power to determine our
administrative control and management.

Foreign states are prohibited under the General Communications Law from directly or
indirectly owning shares of Telmex. The Telecommunications Regulations provide, however, that foreign state-owned enterprises organized as separate entities with their own assets may own minority interests in Telmex or any number of shares with
limited voting rights. Ownership of A Shares or L Shares by such foreign state-owned companies, or by pension or retirement funds organized for the benefit of employees of state, municipal or other Mexican governmental agencies, is not considered
direct or indirect ownership by foreign states for the purposes of the General Communications Law.

Restrictions on Certain Transactions

Our bylaws provide that any acquisition of more than 10% of our issued and outstanding shares, effected in one or more
transactions by any person or group of persons acting in concert, requires prior approval by our Board of Directors.

Restrictions on
Deregistration in Mexico

Our shares are registered with the National Registry for Securities, as required under the
Mexican Securities Market Law. If we wish to cancel our registration, or if it is cancelled by the CNBV, we will be required to make a public offer to purchase all outstanding shares prior to such cancellation. Unless the CNBV authorizes otherwise,
the offer price will be the higher of: (1) the average of the closing price during the previous 30 days on which the shares may have been quoted, or (2) the book value of the shares in accordance with the most recent quarterly report
submitted to the CNBV and to the Mexican Stock Exchange. If, after the public offer is concluded, there are still outstanding shares held by the general public, we will be required to create a trust for a period of six months, into which we will be
required to contribute funds in an amount sufficient to purchase, at the same price as the offer price, the number of outstanding shares held by the general public. Within the five days prior to the commencement of the public offer, after taking
into account the opinion of the audit committee, our Board of Directors must publish its opinion regarding the offer price.

Tender Offer
Rules

Our bylaws provide that any purchasers or group of purchasers that obtain or increase a significant participation
(i.e., 30% or more) in the capital stock of the Company, without conducting a previous public offer in accordance with the Mexican Securities Market Law and applicable rules issued by the CNBV, would not have the right to exercise the
corporate rights of their shares, and that the Company will not register such shares in the share registry book.

Other Provisions

Variable capital. We are permitted to issue shares constituting fixed and variable capital. All of our
outstanding shares of capital stock constitute fixed capital. The issuance of variable capital shares, unlike the issuance of fixed capital shares, does not require an amendment of the bylaws, although it does require a majority



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vote of the AA Shares and the A Shares.

Forfeiture of
shares. As required by Mexican law, our bylaws provide that any alien who at the time of incorporation or at any time thereafter acquires an interest or participation in the capital of the corporation shall be considered, by virtue
thereof, as Mexican in respect thereof and shall be deemed to have agreed not to invoke the protection of his own government, under penalty, in case of breach of such agreement, of forfeiture to the nation of such interest or participation.
Under this provision, a non-Mexican shareholder is deemed to have agreed not to invoke the protection of his own government by asking such government to interpose a diplomatic claim against the Mexican government with respect to the
shareholders rights as a shareholder, but is not deemed to have waived any other rights he may have, including any rights under the U.S. securities laws, with respect to his investment in Telmex. If the shareholder invokes such governmental
protection in violation of this agreement, his shares could be forfeited to the Mexican government. Mexican law requires that such a provision be included in the bylaws of all Mexican corporations unless such bylaws prohibit ownership of shares by
non-Mexican persons.

Exclusive jurisdiction. Our bylaws provide that legal actions relating to the execution,
interpretation or performance of the bylaws shall be brought only in Mexican federal courts.

Duration.
Telmexs existence under the bylaws is 100 years from the date of the public deed in which its incorporation is evidenced.

Purchase of our own shares. We may repurchase our shares on the Mexican Stock Exchange at any time at the then prevailing
market price. Any such repurchase must be made in compliance with the policies established by the Board of Directors. The shareholders meeting approves the maximum amount of funds that may be used during the year for the repurchase of shares.
The ordinary shareholders meeting held on March 3, 2009 approved that up to an additional P.10.0 billion be used for share repurchases. Such funds may be used for the repurchase of shares through the Mexican Stock Exchange. The economic
and voting rights corresponding to repurchased shares may not be exercised during the period in which we own such shares, and such shares are not deemed to be outstanding for purposes of calculating any quorum or vote at any shareholders
meeting during such period.

Conflicts of interest. Shareholders with conflicting interests with Telmex with
respect to a transaction are required to abstain from deliberating and voting on the specific transaction. A shareholder that votes on a specific business transaction in which its interest conflicts with Telmexs may be liable for damages, but
only if the transaction would not have been approved without its vote. A determination of conflicting interest would initially be made by the shareholder subject to judicial challenge. Mexican law does not provide extensive guidance on the criteria
to be applied in making such a decision.

Appraisal rights. Whenever the shareholders approve a change of
corporate purposes, change of nationality of the corporation or transformation from one type of company to another, any shareholder entitled to vote on such change that has voted against it may withdraw from Telmex and receive the book value
attributable to its shares, provided such shareholder exercises its right within 15 days following the adjournment of the meeting at which the change was approved.

Rights of Shareholders

The protections afforded to minority shareholders
under Mexican law are different from those in the United States and many other jurisdictions. The case law concerning fiduciary duties of directors has not been developed and has not been the subject of extensive judicial interpretation in Mexico,
unlike many states in the United States where duties of care and loyalty elaborated by judicial decisions help to shape the rights of minority shareholders. Mexican civil procedure does not contemplate class actions, which permit shareholders in
U.S. courts to bring actions on behalf of other shareholders. Shareholders cannot challenge corporate action taken at a shareholders meeting unless they meet certain procedural requirements, as described above underShareholders
Meetings. As a result of these factors, in practice it may be more difficult for our minority shareholders to enforce rights against us or our directors or controlling shareholders than it would be for shareholders of a U.S. company.



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Enforceability of Civil Liabilities

Telmex is organized under the laws of Mexico, and most of our directors, officers and controlling persons reside outside the United
States. In addition, substantially all of our assets and their assets are located in Mexico. As a result, it may be difficult for investors to effect service of process within the United States on such persons. It may also be difficult to enforce
against them, either inside or outside the United States, judgments obtained against them in U.S. courts, or to enforce in U.S. courts judgments obtained against them in courts in jurisdictions outside the United States, in any action based on civil
liabilities under the U.S. federal securities laws. There is doubt as to the enforceability against such persons in Mexico, whether in original actions or in actions to enforce judgments of U.S. courts, of liabilities based solely on the U.S.
federal securities laws.

CERTAIN CONTRACTS

We are party to concession agreements that authorize us to provide certain telecommunications services on specific terms. These are
described in Item 4. Information on the CompanyRegulation.

Our agreements with related parties are
described in Item 
7. Major Shareholders and Related Party TransactionsRelated Party Transactions.

EXCHANGE
 CONTROLS

Mexico has had a free market for foreign exchange since 1991, and the Mexican government has allowed the peso
to float freely against the U.S. dollar since December 1994.

TAXATION

The following summary contains a description of certain Mexican federal and U.S. federal income tax consequences of the acquisition,
ownership and disposition of our L Shares and A Shares, but it does not purport to be a comprehensive description of all of the tax considerations that may be relevant to a decision to purchase, hold or sell shares.

The Convention for the Avoidance of Double Taxation and the Prevention of Fiscal Evasion and a Protocol thereto between the United States
and Mexico became effective on January 1, 1994 and has been amended by an additional protocol that became effective on July 3, 2003 (together, the Tax Treaty). The United States and Mexico have also entered into an agreement
concerning the exchange of information with respect to tax matters.

This discussion does not constitute, and should not be
considered as, legal or tax advice to holders. This discussion is for general information purposes only and is based upon the federal tax laws of Mexico (including the Mexican Income Tax Law and the Mexican Federal Tax Code) and the United States as
in effect on the date of this annual report (including the Tax Treaty), which are subject to change, and such changes may have retroactive effect. Holders of our shares (or previous holders of our ADSs) should consult their own tax advisers as to
the Mexican, U.S. or other tax consequences of the purchase, ownership and disposition of our shares, including, in particular, the effect of any foreign, state or local tax laws.

Mexican Tax Considerations

The following is a general summary of the
principal consequences under the Mexican Income Tax Law (Ley del Impuesto sobre la Renta) and the rules and regulations thereunder, as currently in effect, of an investment in shares



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by a holder that is not a resident of Mexico and that will not hold the shares or a beneficial interest therein in connection with the conduct of a trade or business through a permanent
establishment in Mexico (a nonresident holder).

For purposes of Mexican taxation, the definition of residence is
highly technical and residence arises in several situations. Generally, an individual is a resident of Mexico if he or she has established his or her home in Mexico, or if he or she has his or her center of interests in Mexico; a corporation is
considered a resident if it has established its place of effective management in Mexico. However, any determination of residence should take into account the particular situation of each person or legal entity.

If a legal entity or an individual is deemed to have a permanent establishment in Mexico for Mexican tax purposes, all income
attributable to that permanent establishment will be subject to Mexican income taxes, in accordance with applicable tax laws.

This summary does not address all of the Mexican tax consequences that may be applicable to specific holders of the shares (including a
holder that controls us, an investor that holds 10% or more of the shares or holders that constitute a group of persons for purposes of Mexican law). It also does not purport to be a comprehensive description of all the Mexican tax considerations
that may be relevant to a decision to purchase, own or dispose of the shares. In particular, this summary does not describe any tax consequences arising under the laws of any state, locality, municipality or taxing jurisdiction other than certain
federal laws of Mexico.

Tax Treaties

The Mexican Income Tax Law has established procedural requirements for a nonresident holder disposing of shares to be entitled to benefits under any of the tax treaties to which Mexico is a party. These
procedural requirements include the obligation to (i) prove tax treaty residence, (ii) appoint a representative in Mexico for taxation purposes and (iii) present tax calculations prepared by authorized certified public accountants.
These requirements are also applicable to provisions of the Tax Treaty that may affect the taxation of certain U.S. holders (as defined inU.S. Federal Income Tax Considerationsbelow).

Payment of Dividends

Dividends, either in cash or in kind, paid with respect to our shares will not be subject to Mexican withholding tax.

Taxation of Dispositions

Gains on the sale of shares by a
non-Mexican holder will generally not be subject to Mexican income tax, provided that the transaction is carried out through (a) the Mexican Stock Exchange, (b) other securities exchanges or markets approved by the Mexican Ministry of
Finance or (c) other securities exchanges or markets with ample securities trading that are located in countries with which Mexico has entered into an income tax treaty, such as the New York Stock Exchange, NASDAQ and the Mercado de Valores
Latinoamericanos en Euros (Latibex).

The tax exemption described in the previous paragraph will not be applicable to
pre-negotiated trades executed through the facilities of a Mexican securities exchange. The exemption also will not be applicable in the case of a person or group of persons that, directly or indirectly, holds 10% or more of the shares representing
our capital stock, or that holds a controlling interest in us, if in a period of 24 months, a sale of 10% or more of our fully paid shares, or of a controlling interest in us, is carried out through one or several simultaneous or successive
transactions, including those carried out through derivative financial instruments or other similar transactions.

For a
nonresident corporation or individual that does not meet the requirements summarized above, proceeds obtained from the sale or disposition of shares will be subject to a 25% tax. Under certain circumstances, nonresident corporations and individuals,
alternatively, may elect to pay a 20% tax on the gain obtained from the transaction.



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Pursuant to the Tax Treaty, gains realized by a U.S. holder (as defined in U.S.
Federal Income Tax Considerations) eligible for the benefits of the Tax Treaty from the sale or other disposition of shares, even if the sale or disposition is not carried out under the circumstances described in the preceding paragraphs, will
not be subject to Mexican income tax, provided that such U.S. holder owned less than 25% of the shares representing our capital stock (including ADSs), directly or indirectly, during the 12-month period preceding such disposition.

Gains realized by other nonresident holders that are eligible to receive benefits pursuant to other income tax treaties to which Mexico
is a party may be exempt from Mexican income tax in whole or in part. If the holder is a corporation that is a resident of a tax haven (as defined by the Mexican Income Tax Law), the applicable rate will be 40% on the gross income obtained. Non-U.S.
holders should consult their own tax advisers as to their possible eligibility under such treaties.

In other cases,
nonresident holders will be subject to Mexican income tax on the sale or other disposition of shares. Such nonresident holders should consult with their own tax advisers as to how Mexican income tax would apply to their circumstances.

Other Mexican Taxes

Under certain circumstances, a nonresident holder will not be liable for estate, inheritance or similar taxes with respect to its holdings of shares. A gratuitous transfer of shares by a nonresident
holder, however, may in certain circumstances result in the imposition of Mexican tax upon the recipient. There are no Mexican stamp, issue, registration or similar taxes payable by a nonresident holder with respect to shares.

U.S. Federal Income Tax Considerations

Except as otherwise indicated, the following is a summary of certain U.S. federal income tax consequences to U.S. holders (as defined below) of the acquisition, ownership and disposition of shares. The
summary does not purport to be a comprehensive description of all of the tax consequences of the acquisition, ownership or disposition of shares that may be relevant to U.S. holders. The summary applies only to U.S. holders that will hold their
shares as capital assets and does not apply to special classes of U.S. holders such as dealers in securities or currencies, holders with a functional currency other than the U.S. dollar, holders of 10% or more of our voting shares, tax-exempt
organizations, financial institutions, holders liable for the alternative minimum tax, securities traders electing to account for their investment in their shares on a mark-to-market basis, certain short-term holders of shares and persons holding
their shares in a hedging transaction or as part of a straddle or conversion transaction.

For purposes of this discussion, a
U.S. holder is a holder or beneficial owner of shares that is:



| |  |  | a citizen or resident of the United States of America;
| | - |  | ------------------------------------------------------



| |  |  | a corporation organized under the laws of the United States of America or any state thereof; or
| | - |  | -----------------------------------------------------------------------------------------------



| |  |  | otherwise subject to U.S. federal income taxation on a net income basis with respect to the shares.
| | - |  | ---------------------------------------------------------------------------------------------------

If a partnership holds our shares, the tax treatment of a partner will generally depend on the status of the partner and the activities
of the partnership. Partners of a partnership holding our shares should consult their own tax advisers.

Each U.S. holder
should consult such holders own tax adviser concerning the overall tax consequences to it of the ownership or disposition of shares that may arise under foreign, state and local laws.

Taxation of Distributions

In this discussion, we use the term dividends to mean distributions paid out of our current or accumulated earnings and profits with respect to our shares. In general, the gross amount of any
dividends will be subject to U.S. federal income taxation. Dividends will be paid in pesos and will be includible in the income of a U.S. holder in a U.S. dollar amount calculated by reference to the exchange rate in effect on the day that they are
received by the U.S.



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holder. U.S. holders should consult their own tax advisers regarding the treatment of foreign currency gain or loss, if any, on any pesos received by a U.S. holder or depositary that are
converted into U.S. dollars on a date subsequent to receipt. Subject to certain exceptions for short-term and hedged positions, the U.S. dollar amount of dividends received by an individual prior to January 1, 2013 with respect to the
L Shares, A Shares and AA Shares will be subject to taxation at a maximum rate of 15% if the dividends are qualified dividends. Dividends paid on the L Shares, A Shares and AA Shares will be treated as qualified
dividends if (i) we are eligible for the benefits of a comprehensive income tax treaty with the United States that the Internal Revenue Service has approved for the purposes of the qualified dividend rules and (ii) we were not, in the year
prior to the year in which the dividend was paid, and are not, in the year in which the dividend is paid, a passive foreign investment company, or PFIC. The Tax Treaty has been approved for the purposes of the qualified dividend rules. In addition,
based on our audited consolidated financial statements and relevant market and shareholder data, we believe that we were not treated as a PFIC for U.S. federal income tax purposes with respect to our 2010 or 2011 taxable years. In addition, based on
our audited consolidated financial statements and our current expectations regarding the value and nature of our assets, the sources and nature of our income and relevant market and shareholder data, we do not anticipate becoming a PFIC for our 2012
taxable year.

To the extent that the amount of any distribution exceeds our current and accumulated earnings and profits for
a taxable year, as determined under United States federal income tax principles, the distribution will first be treated as a tax-free return of capital, causing a reduction in the adjusted basis of the shares (thereby increasing the amount of gain,
or decreasing the amount of loss, to be recognized by you on a subsequent disposition of the shares), and the balance in excess of adjusted basis will be taxed as capital gain recognized on a sale or exchange. However, we do not expect to keep
earnings and profits in accordance with United States federal income tax principles. Therefore, you should expect that a distribution will generally be treated as a dividend (as discussed above).

Dividends paid by us will not be eligible for the dividends-received deduction allowed to corporations under the U.S. Internal Revenue
Code of 1986, as amended (the Code).

Distributions of additional shares to U.S. holders with respect to their
shares that are made as part of a pro rata distribution to all of our shareholders generally will not be subject to U.S. federal income tax. The basis of any new shares so received will be determined by allocating the U.S. holders basis in the
old shares and the new shares, based on the relative fair market values on the date of distribution. For U.S. tax purposes, any such tax-free share distribution generally would not result in foreign-source income to a U.S. holder. You should
consult your own tax advisors regarding the application of the foreign tax credit rules to your investment in the shares.

Taxation of Dispositions

A U.S. holder will recognize gain or loss on the sale or other disposition of the shares in an amount equal to the difference between the U.S. holders basis in such shares (in U.S. dollars) and the
amount realized on the disposition (in U.S. dollars, determined at the spot rate on the date of disposition or, for a cash basis U.S. holder (or an electing accrual basis U.S. holder), at the exchange rate in effect on the settlement date, if the
amount realized is denominated in a foreign currency). Gain or loss realized by a U.S. holder on such sale or other disposition generally will be long-term capital gain or loss if, at the time of disposition, it was treated as having held the shares
for more than one year. The net amount of long-term capital gain recognized by an individual holder is taxed at a reduced rate. Such gain or loss generally will be treated as U.S. source gain or loss for U.S. foreign tax credit purposes. For
purposes of calculating gain or loss with respect to a disposition of shares subsequent to a withdrawal of such shares in exchange for ADSs, a U.S. holders tax basis in such shares will, at the time of such withdrawal, have been the same as
its tax basis in such ADSs. A U.S. holders holding period in such shares will include the holding period for such ADSs.

Gain, if any, realized by a U.S. holder on the sale or other disposition of the shares will be treated as U.S. source income for U.S.
foreign tax credit purposes. Consequently, if a Mexican withholding tax is imposed on the sale or disposition of the shares, a U.S. holder that does not receive significant foreign source income from other sources may not be able to derive effective
U.S. foreign tax credit benefits in respect of these Mexican taxes. U.S. holders should consult their own tax advisers regarding the application of the foreign tax credit rules to their investment in, and disposition of, our shares.



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Exchange of Shares

A U.S. holders exchange of A Shares for L Shares will not constitute a taxable event for U.S. federal income tax purposes. An
exchanging U.S. holder will have a tax basis in the L Shares equal to the basis such holder had in the exchanged A Shares. An exchanging U.S. holders holding period for the L Shares will include the holding period such U.S. holder had in the A
Shares before such shares were exchanged.

A U.S. holders exchange of L Shares for AA Shares, pursuant to the option to
exchange in respect of such L Shares, will not constitute a taxable event for U.S. federal income tax purposes. An exchanging U.S. holder will have a tax basis in the AA Shares received equal to the basis such holder had in the exchanged L Shares. A
U.S. holders holding period for AA Shares received in such an exchange will include the holding period such U.S. holder had in the L Shares prior to such exchange. The AA Shares, however, may be owned only by holders that qualify as Mexican
investors as defined in the Foreign Investment Law and our bylaws. See Bylaws and Mexican LawLimitation on Share Ownership.

Information Reporting and Backup Withholding

Dividends on, and
proceeds from the sale or other disposition of, the shares paid to a U.S. holder generally may be subject to the information reporting requirements of the Code and may be subject to backup withholding unless the holder:



| |  |  | establishes that it is a corporation or other exempt holder; or
| | - |  | ---------------------------------------------------------------



| |  |  | provides an accurate taxpayer identification number on a properly completed Internal Revenue Service Form W-9 and certifies that it is not subject to
backup withholding and otherwise complies with applicable requirements of the backup withholding rules.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The
amount of any backup withholding from a payment to a holder will be allowed as a credit against the U.S. holders U.S. federal income tax liability and may entitle such holder to a refund, provided that certain required information is furnished
to the Internal Revenue Service.

U.S. Tax Consequences for Non-U.S. holders

Distributions. A holder or beneficial owner of shares that is not a U.S. holder for U.S. federal income tax purposes (a
non-U.S. holder) generally will not be subject to U.S. federal income or withholding tax on dividends received on shares, unless such income is effectively connected with the conduct by the holder of a U.S. trade or business.

Dispositions. A non-U.S. holder of shares will not be subject to U.S. federal income or withholding tax on gain realized on the
sale of shares, unless:



| |  |  | such gain is effectively connected with the conduct by the holder of a U.S. trade or business; or
| | - |  | -------------------------------------------------------------------------------------------------



| |  |  | in the case of gain realized by an individual non-U.S. holder, the non-U.S. holder is present in the United States for 183 days or more in the taxable
year of the sale and certain other conditions are met.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Information reporting and backup withholding.
Although non-U.S. holders generally are exempt from backup withholding, a non-U.S. holder may be required to comply with certification and identification procedures in order to establish its exemption from information reporting and backup
withholding.



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DOCUMENTS ON DISPLAY

We file reports, including annual reports on Form 20-F, and other information electronically with the SEC pursuant to the rules and
regulations of the SEC that apply to foreign private issuers. You may read and copy any materials filed with the SEC at its Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. You may obtain information on the operation of the
Public Reference Room by calling the SEC at 1-800-SEC-0330. Any filings we make are also available to the public over the Internet at the SECs website at www.sec.gov and at our website at www.telmex.com. (This URL is intended to
be an inactive textual reference only. It is not intended to be an active hyperlink to our website. The information on our website, which might be accessible through a hyperlink resulting from this URL, is not and shall not be deemed to be
incorporated into this annual report.)



|Item 11. | Quantitative and Qualitative Disclosures about Market Risk
|-------- | ----------------------------------------------------------

EXCHANGE RATE AND INTEREST RATE RISKS

We are
exposed to exchange rate risk and interest rate risk related to our indebtedness. Exchange rate risk exists principally with respect to our indebtedness denominated in currencies other than Mexican pesos. As of December 31, 2011, indebtedness
denominated in foreign currencies was P.35,968 million, of which P.32,187 million was denominated in U.S. dollars and P.3,781 million was denominated in other currencies. Interest rate risk exists principally with respect to our indebtedness that
bears interest at floating rates. We had P.47,185 million of indebtedness bearing interest at floating rates at December 31, 2011.

We use derivative financial instruments to minimize the impact of fluctuations in exchange rates and floating interest rates on our indebtedness. We regularly assess our exposure and monitor opportunities
to manage these risks. See Item 
5. Operating and Financial Review and ProspectsHedging.

SENSITIVITY ANALYSIS
DISCLOSURES

Exchange Rates

The potential loss in fair value of financial instruments at December 31, 2011 that would have resulted from a hypothetical, instantaneous and unfavorable 10% change in currency exchange rates,
taking into account our derivative transactions, would have been approximately P.675 million. Such a change in currency exchange rates would also have resulted in additional interest expense of approximately P.17 million per year, assuming no change
in the principal amount of such indebtedness, reflecting the increased costs in pesos of servicing foreign currency indebtedness. This sensitivity analysis assumes an instantaneous unfavorable 10% change in exchange rates affecting the foreign
currencies in which our indebtedness is denominated.

Interest Rates

The potential loss in fair market value of financial instruments at December 31, 2011 that would have resulted from a hypothetical,
instantaneous and unfavorable change of 100 basis points in the interest rate applicable to such financial instruments, taking into account our derivative transactions, would have been approximately P.1,427 million. This effect would be fully
attributable to the impact of the interest rate change on fixed-rate financial assets and liabilities. A hypothetical, instantaneous and unfavorable change of 100 basis points in the interest rate applicable to floating-rate financial assets and
liabilities held at December 31, 2011, taking into account the effect of our derivative transactions, would have resulted in additional interest expense of approximately P.381 million per year, assuming no change in the principal amount of such
indebtedness. The above sensitivity analyses are based on



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the assumption of an unfavorable 100 basis point movement of the interest rates applicable to each homogeneous category of financial assets and liabilities. A homogeneous category is defined
according to the currency in which financial assets and liabilities are denominated and assumes the same interest rate movement with each homogeneous category. As a result, interest rate risk sensitivity analysis may overstate the impact of interest
rate fluctuations for such financial instruments, as consistently unfavorable.



|Item 12. | Description of Securities Other Than Equity Securities
|-------- | ------------------------------------------------------



|Item 12A. | Debt Securities
|--------- | ---------------

Not
applicable.



|Item 12B. | Warrants and Rights
|--------- | -------------------

Not
applicable.



|Item 12C. | Other Securities
|--------- | ----------------

Not
applicable.



|Item 12D. | American Depositary Shares
|--------- | --------------------------

On December 19, 2011, we announced our intention to terminate our ADR programs. In accordance with the deposit agreements, JPMorgan,
as depositary, provided 30 days notice of termination to all holders of ADRs before the termination became effective on January 30, 2012.

For the year ended December 31, 2011, the depositary paid us approximately U.S.$2.3 million, which includes reimbursements for certain expenses we incurred in connection with the ADR program, such as
legal and accounting fees, listing fees, investor relations expenses and fees payable to service providers for the distribution of material to ADR holders.



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PART II



|Item 13. | Defaults, Dividend Arrearages and Delinquencies
|-------- | -----------------------------------------------

None.



|Item 14. | Material Modifications to the Rights of Securities Holders and Use of Proceeds
|-------- | ------------------------------------------------------------------------------

None.



|Item 15. | Controls and Procedures
|-------- | -----------------------

Disclosure
Controls and Procedures

We have evaluated, with the participation of our chief executive officer and chief financial
officer, the effectiveness of our disclosure controls and procedures as of December 31, 2011. There are inherent limitations to the effectiveness of any system of disclosure controls and procedures, including the possibility of human error and
the circumvention or overriding of the controls and procedures. Accordingly, even effective disclosure controls and procedures can only provide reasonable assurance of achieving their control objectives. Based upon our evaluation, our chief
executive officer and chief financial officer concluded that our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed by us in the reports that we file or submit under the
Exchange Act is recorded, processed, summarized and reported within the time periods specified in the applicable rules and forms, and that it is accumulated and communicated to our management, including our chief executive officer and chief
financial officer, as appropriate to allow timely decisions regarding required disclosure.

Managements Annual Report on Internal
Control Over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over
financial reporting as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act. Our internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of
financial statements for external purposes in accordance with International Financial Reporting Standards, as issued by the International Accounting Standards Board. Our internal control over financial reporting includes those policies and
procedures that:



| | (a) | pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the Company;
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (b) | provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with International Financial
Reporting Standards, as issued by the International Accounting Standards Board, and that receipts and expenditures of the Company are being made only in accordance with authorizations of our management and directors; and
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (c) | provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the Companys assets that could have a
material effect on the financial statements.
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Because of its inherent limitations, internal control over
financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of
compliance with the policies or procedures may deteriorate.

Management assessed the effectiveness of our internal control
over financial reporting as of December 31, 2011. In making this assessment, management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control-Integrated Framework and,
with respect to the effectiveness



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of our information technology, the criteria set forth in the Control Objectives for Information and related Technology (COBIT).

Based on our assessment and those criteria, management believes that the Company maintained effective internal control over financial
reporting as of December 31, 2011.

Mancera, S.C., a member practice of Ernst & Young Global, the independent
registered public accounting firm that has audited our financial statements, has issued an attestation report on our internal control over financial reporting, which appears below.

There has been no change in our internal control over financial reporting during 2011 that has materially affected, or is reasonably
likely to materially affect, our internal control over financial reporting.



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Report of Independent Registered Public Accounting Firm on Internal Control over Financial Reporting

The Board of Directors and Shareholders

Teléfonos de México, S.A.B. de C.V.

We have audited
Teléfonos de México, S.A.B. de C.V. and subsidiaries internal control over financial reporting as of December 31, 2011, based on criteria established in Internal Control  Integrated Framework issued by the Committee of
Sponsoring Organizations of the Treadway Commission (the COSO criteria). Teléfonos de México, S.A.B. de C.V. and subsidiaries management is responsible for maintaining effective internal control over financial
reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Managements Annual Report on Internal Control Over Financial Reporting. Our responsibility is to express an
opinion on the Companys internal control over financial reporting based on our audit.

We conducted our audit in
accordance with the standards of the Public Company Accounting Oversight Board (United States of America). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over
financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and
operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A companys internal control over financial reporting is a process designed to provide reasonable assurance regarding the
reliability of financial reporting and the preparation of financial statements for external purposes in accordance with International Financial Reporting Standards as issued by International Accounting Standards Board (IFRS). A
companys internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the
assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with IFRS, and that receipts and expenditures of the company are being made only in
accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the companys assets that could
have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial
reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance
with the policies or procedures may deteriorate.

In our opinion, Teléfonos de México, S.A.B. de C.V. and
subsidiaries maintained, in all material respects, effective internal control over financial reporting as of December 31, 2011 based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States of America), the consolidated statements of financial position of Teléfonos de
México, S.A.B. de C.V. and subsidiaries as of December 31, 2011 and 2010, and as of January 1, 2010, and the related consolidated statements of income, changes in equity and cash flows for each of the two years in the period ended
December 31, 2011, and our report dated April 26, 2012 expressed an unqualified opinion thereon.



Mancera, S.C.A member practice ofErnst & Young Global/s/ C.P.C. David Sitt CofradíaC.P.C. David Sitt Cofradía


Mexico City, Mexico

April 26, 2012



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|Item 16A. | Audit Committee Financial Expert
|--------- | --------------------------------

Our Board of Directors has determined that Rafael Kalach M., the chairman of our audit and corporate practices committee and a member of our Board of Directors, qualifies as an audit committee financial
expert. Rafael Kalach M. has a public accountant degree from the Universidad Nacional Autónoma de México. He has been a member of audit, finance and planning, and evaluation and compensation committees of various Mexican companies.
Rafael Kalach M. qualifies as independent, as determined by our shareholders at their annual ordinary general meeting pursuant to the Mexican Securities Market Law and as defined under the rules of the NYSE and the NASDAQ Stock Market, Inc. that are
applicable to foreign private issuers. See Item 6. Directors, Senior Management and EmployeesAudit Committee.



|Item 16B. | Code of Ethics
|--------- | --------------

We have
adopted a code of ethics, as defined in Item 16B of Form 20-F. Our code of ethics applies to our chief executive officer, chief financial officer, principal accounting officer, persons performing similar functions and other personnel. Our code
of ethics is available on our website at www.telmex.com. If we amend the provisions of our code of ethics that apply to our chief executive officer, our chief financial officer, our principal accounting officer and persons performing similar
functions, or if we grant any waiver of such provisions, we will disclose such amendment or waiver on our website at the same address.



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|Item 16C. | Principal Accountant Fees and Services
|--------- | --------------------------------------

Audit and Non-Audit Fees

The following table sets forth the fees billed to us by our independent auditors, Mancera, S.C., a member practice of Ernst &
Young Global, an independent registered public accounting firm, and by other member practices of Ernst & Young Global during the years ended December 31, 2011 and 2010:



|                   |  |                         |          |  |      |  |          | 
|------------------ |  | ----------------------- | -------- |  | ---- |  | -------- | 
|                   |  | Year ended December 31, |         
|                   |  | 2011                    |          |  | 2010 | 
|                   |  | (in thousands of pesos) |         
|Audit fees         |  |                         | P.31,953 |  |      |  | P.38,501 | 
|Audit-related fees |  |                         | 296      |  |      |  | 1,896    | 
|Tax fees           |  |                         |         |  |      |  | 877      | 
|                   |  |                         |          |  |      |  |          | 
|Total fees         |  |                         | P.32,249 |  |      |  | P.41,274 | 
|                   |  |                         |          |  |      |  |          | 

Audit fees in the above table are the aggregate fees billed in connection with the audit of our annual
financial statements, the review of our interim financial statements, statutory and regulatory audits, and fees related to compliance with the Sarbanes-Oxley Act of 2002.

Audit-related fees in the above table are fees billed for assurance and related services that are reasonably related to the performance of the audit or review of our financial statements and
are not reported under Audit fees, in particular fees billed for the review of information provided to Mexican regulatory authorities.

Audit Committee Approval Policies and Procedures

Our audit committee has
established policies and procedures for the engagement of our independent auditors for services. Such policies and procedures outline services that require specific approval on a case-by-case basis and general services that have been approved in
advance by the audit committee, which include statutory and regulatory audits, tax compliance and evaluation of the security of our information technology. Prior to providing any services that require specific pre-approval, our independent auditor,
together with our chief financial officer, will jointly present to the audit committee a request for approval of audit services, in which such persons confirm that the request complies with applicable rules.

Item 16D. Exemptions from the Listing Standards for Audit Committees

Not applicable.

Item 16E. Purchases of Equity Securities by the Issuer and Affiliated Purchasers

The following table provides
information on L Shares purchased by the Company and affiliated purchasers in 2011:



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|                             |  |                                     |               |  |                                      |  |       |                                                                         |  |  |                                                                                   |  |  |                                                                                                           |       |  |  |  |           | 
|---------------------------- |  | ----------------------------------- | ------------- |  | ------------------------------------ |  | ----- | ----------------------------------------------------------------------- |  |  | --------------------------------------------------------------------------------- |  |  | --------------------------------------------------------------------------------------------------------- | ----- |  |  |  | --------- | 
|Year ended December 31, 2011 |  | Total Number ofL SharesPurchased(1) |               |  | WeightedAverage PricePaid per LShare |  |       | Total Number ofL SharesPurchased asPart of theShareRepurchaseProgram(2) |  |  | WeightedAverage PricePaid per
LSharePurchased asPart of theShareRepurchaseProgram |  |  | Approximate PesoValue (inThousands) of LShares thatMay Yet BePurchased
Underthe
ShareRepurchaseProgram(3) |      
|January 1-31                 |  |                                     | 18,500,000    |  |                                      |  | 10.22 |                                                                         |  |  | 18,500,000                                                                        |  |  |                                                                                                           | 10.22 |  |  |  | 6,292,557 | 
|February 1-28                |  |                                     | 27,000,000    |  |                                      |  | 10.65 |                                                                         |  |  | 27,000,000                                                                        |  |  |                                                                                                           | 10.65 |  |  |  | 6,005,055 | 
|March 1-31                   |  |                                     | 36,500,000    |  |                                      |  | 10.52 |                                                                         |  |  | 36,500,000                                                                        |  |  |                                                                                                           | 10.52 |  |  |  | 5,620,901 | 
|April 1-30                   |  |                                     | 20,500,000    |  |                                      |  | 10.90 |                                                                         |  |  | 20,500,000                                                                        |  |  |                                                                                                           | 10.90 |  |  |  | 5,397,390 | 
|May 1-31                     |  |                                     | 19,000,000    |  |                                      |  | 10.82 |                                                                         |  |  | 19,000,000                                                                        |  |  |                                                                                                           | 10.82 |  |  |  | 5,191,739 | 
|June 1-30                    |  |                                     | 5,000,000     |  |                                      |  | 9.97  |                                                                         |  |  | 5,000,000                                                                         |  |  |                                                                                                           | 9.97  |  |  |  | 5,141,867 | 
|July 1-31                    |  |                                     | 2,000,000     |  |                                      |  | 9.52  |                                                                         |  |  | 2,000,000                                                                         |  |  |                                                                                                           | 9.52  |  |  |  | 5,122,824 | 
|August 1-31                  |  |                                     |               |  |                                      |  |       |                                                                         |  |  |                                                                                   |  |  |                                                                                                           |       |  |  |  | 5,122,824 | 
|September 1-30               |  |                                     |               |  |                                      |  |       |                                                                         |  |  |                                                                                   |  |  |                                                                                                           |       |  |  |  | 5,122,824 | 
|October 1-31                 |  |                                     |               |  |                                      |  |       |                                                                         |  |  |                                                                                   |  |  |                                                                                                           |       |  |  |  | 5,122,824 | 
|November 1-30                |  |                                     | 4,097,462,462 |  |                                      |  | 10.63 |                                                                         |  |  |                                                                                   |  |  |                                                                                                           |       |  |  |  | 5,122,824 | 
|December 1-31                |  |                                     | 15,288,542    |  |                                      |  | 10.11 |                                                                         |  |  |                                                                                   |  |  |                                                                                                           |       |  |  |  | 5,122,824 | 
|                             |  |                                     |               |  |                                      |  |       |                                                                         |  |  |                                                                                   |  |  |                                                                                                           |       |  |  |  |           | 
|Total/Average                |  |                                     | 4,241,251,004 |  |                                      |  | 10.63 |                                                                         |  |  | 128,500,000                                                                       |  |  |                                                                                                           | 10.57 |  |  |  |           | 
|                             |  |                                     |               |  |                                      |  |       |                                                                         |  |  |                                                                                   |  |  |                                                                                                           |       |  |  |  |           | 



|(1) | We do not repurchase our L Shares other than through the share repurchase program. An aggregate of 55,185,918 L Shares was purchased by our affiliates in 2011 in
open-market transactions. An aggregate of 4,057,565,086 L Shares was purchased by América Móvil in a tender offer that closed on November 11, 2011.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | We periodically repurchase our L Shares on the open market using funds authorized by our shareholders specifically for the repurchase of L Shares and A Shares by us at
our discretion. On March 3, 2009, our shareholders authorized an additional P.10,000 million for the repurchase of L Shares and A Shares.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | This is the approximate peso amount available at the end of the period for purchases of both L Shares and A Shares pursuant to the share repurchase program.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------



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The following table provides information on A Shares purchased by the Company and affiliated purchasers in
2011:



|                             |  |                                     |            |  |                                      |  |       |                                                                         |  |                                                                                   |  |                                                                                                           |  |  |           | 
|---------------------------- |  | ----------------------------------- | ---------- |  | ------------------------------------ |  | ----- | ----------------------------------------------------------------------- |  | --------------------------------------------------------------------------------- |  | --------------------------------------------------------------------------------------------------------- |  |  | --------- | 
|Year ended December 31, 2011 |  | Total Number ofA SharesPurchased(1) |            |  | WeightedAverage PricePaid per AShare |  |       | Total Number ofA SharesPurchased asPart of theShareRepurchaseProgram(2) |  | WeightedAverage PricePaid per ASharePurchased asPart of
theShareRepurchaseProgram |  | Approximate PesoValue (inThousands) of AShares thatMay Yet BePurchased
Underthe
ShareRepurchaseProgram(3) | 
|January 1-31                 |  |                                     |            |  |                                      |  |       |                                                                         |  |                                                                                   |  |                                                                                                           |  |  | 6,292,557 | 
|February 1-28                |  |                                     |            |  |                                      |  |       |                                                                         |  |                                                                                   |  |                                                                                                           |  |  | 6,005,055 | 
|March 1-31                   |  |                                     |            |  |                                      |  |       |                                                                         |  |                                                                                   |  |                                                                                                           |  |  | 5,620,901 | 
|April 1-30                   |  |                                     |            |  |                                      |  |       |                                                                         |  |                                                                                   |  |                                                                                                           |  |  | 5,397,390 | 
|May 1-31                     |  |                                     |            |  |                                      |  |       |                                                                         |  |                                                                                   |  |                                                                                                           |  |  | 5,191,739 | 
|June 1-30                    |  |                                     |            |  |                                      |  |       |                                                                         |  |                                                                                   |  |                                                                                                           |  |  | 5,141,867 | 
|July 1-31                    |  |                                     |            |  |                                      |  |       |                                                                         |  |                                                                                   |  |                                                                                                           |  |  | 5,122,824 | 
|August 1-31                  |  |                                     |            |  |                                      |  |       |                                                                         |  |                                                                                   |  |                                                                                                           |  |  | 5,122,824 | 
|September 1-30               |  |                                     |            |  |                                      |  |       |                                                                         |  |                                                                                   |  |                                                                                                           |  |  | 5,122,824 | 
|October 1-31                 |  |                                     |            |  |                                      |  |       |                                                                         |  |                                                                                   |  |                                                                                                           |  |  | 5,122,824 | 
|November 1-30                |  |                                     | 57,747,784 |  |                                      |  | 10.78 |                                                                         |  |                                                                                   |  |                                                                                                           |  |  | 5,122,824 | 
|December 1-31                |  |                                     | 294,100    |  |                                      |  | 10.08 |                                                                         |  |                                                                                   |  |                                                                                                           |  |  | 5,122,824 | 
|                             |  |                                     |            |  |                                      |  |       |                                                                         |  |                                                                                   |  |                                                                                                           |  |  |           | 
|Total/Average                |  |                                     | 58,041,884 |  |                                      |  | 10.78 |                                                                         |  |                                                                                   |  |                                                                                                           |  |  |           | 
|                             |  |                                     |            |  |                                      |  |       |                                                                         |  |                                                                                   |  |                                                                                                           |  |  |           | 



|(1) | We do not repurchase our A Shares other than through the share repurchase program. An aggregate of 742,626 A Shares was purchased by our affiliates in 2011 in
open-market transactions. An aggregate of 57,299,258 A Shares was purchased by América Móvil in a tender offer that closed on November 11, 2011.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | We periodically repurchase our A Shares on the open market using funds authorized by our shareholders specifically for the repurchase of L Shares and A Shares by us at
our discretion. On March 3, 2009, our shareholders authorized an additional P.10,000 million for the repurchase of L Shares and A Shares.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | This is the approximate peso amount available at the end of the period for purchases of both L Shares and A Shares pursuant to the share repurchase program.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------



|Item 16F. | Change in Registrants Certifying Accountant
|--------- | --------------------------------------------

Not applicable.



|Item 16G. | Corporate Governance
|--------- | --------------------

Not
applicable.



|Item 16H. | Mine Safety Disclosure
|--------- | ----------------------

Not applicable.



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PART III



|Item 17. | Financial Statements
|-------- | --------------------

Not
applicable.



|Item 18. | Financial Statements
|-------- | --------------------

See
our consolidated financial statements beginning on page F-1, incorporated herein by reference.



|Item 19. | Exhibits
|-------- | --------

Documents filed
as exhibits to this annual report:



|     |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|---- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|1.1  |  | Amended and restated bylaws (estatutos sociales) of Teléfonos de México, S.A.B. de C.V., dated December 26, 2007 (English translation) (incorporated by
reference to Exhibit 1.1 in our annual report on Form 20-F for the year ended December 31, 2008 (File No. 1-32741) filed on June 27, 2008).                                                                                                                                                                                                                                                                                                                          
|     | 
|2.1  |  | Loan Agreement, dated as of August 11, 2006, among Teléfonos de México, S.A.B. de C.V., the lenders party thereto, Citibank, N.A., as administrative agent, ABN
AMRO Bank N.V., BBVA Securities Inc., Citigroup Global Markets Inc., HSBC Securities (USA) Inc. and Calyon New York Branch, as joint bookrunners, ABN AMRO Bank N.V., as syndication agent, and Banco Bilbao Vizcaya Argentaria, S.A. and HSBC Securities
(USA) Inc., as co-documentation agents (incorporated by reference to Exhibit 2.3 in our annual report on Form 20-F for the year ended December 31, 2006 (File No. 1-32741) filed on July 16, 2007).
|     | 
|7.1  |  | Calculation of Ratios of Earnings to Fixed Charges.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|     | 
|8.1  |  | List of significant subsidiaries of Teléfonos de México, S.A.B. de C.V.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|     | 
|12.1 |  | Certification of the Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|     | 
|12.2 |  | Certification of the Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|     | 
|13.1 |  | Certification pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     

Omitted from the exhibits filed with this annual report are certain instruments and agreements with
respect to long-term debt of Telmex, none of which authorizes securities in a total amount that exceeds 10% of the total assets of Telmex. We hereby agree to furnish to the SEC copies of any such omitted instruments or agreements as the Commission
requests.



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SIGNATURE

The registrant hereby certifies that it meets all of the requirements for filing on Form 20-F and that it has duly caused and authorized the undersigned to sign this annual report on its behalf.

Dated: April 26, 2012



TELÉFONOS DE MÉXICO, S.A.B. DE C.V.By:

/s/ Carlos Fernando Robles MiajaName: Carlos Fernando Robles Miaja Title: Chief Financial Officer




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##### Table of Contents

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of

Teléfonos de México, S.A.B. de C.V.

We have audited the accompanying consolidated statements of financial position of Teléfonos de México, S.A.B. de C.V. and subsidiaries as of December 31, 2011 and 2010, and as of
January 1, 2010, and the related consolidated statements of income, changes in equity and cash flows for each of the two years in the period ended December 31, 2011. These financial statements are the responsibility of the Companys
management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in
accordance with the standards of the Public Company Accounting Oversight Board (United States of America). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by
management, as well evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of Teléfonos de México, S.A.B. de C.V. and
subsidiaries as of December 31, 2011 and 2010, and as of January 1, 2010, and the consolidated results of their operations and their cash flows for each of the two years in the period ended December 31, 2011, in conformity with
International Financial Reporting Standards as issued by the International Accounting Standards Board.

We also have audited, in accordance
with the standards of the Public Company Accounting Oversight Board (United States of America), Teléfonos de México, S.A.B. de C.V. and subsidiaries internal control over financial reporting as of December 31, 2011, based on
criteria established in Internal Control  Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission, and our report dated April 26, 2012 expressed an unqualified opinion thereon.



Mancera, S.C. A member practice of Ernst & Young Global/s/ C.P.C. David Sitt CofradíaC.P.C. David Sitt Cofradía


Mexico City, Mexico

April 26, 2012



F-1



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Consolidated Statements of Financial Position

(In thousands of Mexican pesos)



|                                                               |  |                    |             |   |                  |    |             |      |  |    |             | 
|-------------------------------------------------------------- |  | ------------------ | ----------- | - | ---------------- | -- | ----------- | ---- |  | -- | ----------- | 
|                                                               |  | As of December 31, |             |   | As of January 1, |   
|                                                               |  | 2011               |             |   | 2010             |    |             | 2010 | 
|Assets                                                         |  |                    |             |   |                  |    |             |      |  |    |             | 
|Current assets:                                                |  |                    |             |   |                  |    |             |      |  |    |             | 
|Cash and cash equivalents (Note 4)                             |  | P.                 | 1,795,004   |   |                  | P. | 7,493,465   |      |  | P. | 14,379,768  | 
|Accounts receivable, net (Note 5)                              |  |                    | 22,028,064  |   |                  |    | 17,118,359  |      |  |    | 20,425,556  | 
|Derivative financial instruments (Note 9)                      |  |                    | 6,114,677   |   |                  |    | 6,695,899   |      |  |    | 12,088,437  | 
|Inventories, net                                               |  |                    | 1,583,060   |   |                  |    | 1,783,579   |      |  |    | 1,448,102   | 
|Prepaid expenses and other current assets                      |  |                    | 4,710,371   |   |                  |    | 3,137,852   |      |  |    | 3,307,936   | 
|                                                               |  |                    |             |   |                  |    |             |      |  |    |             | 
|Total current assets                                           |  |                    | 36,231,176  |   |                  |    | 36,229,154  |      |  |    | 51,649,799  | 
|                                                               |  |                    |            
|Property, plant and equipment, net (Note 6)                    |  |                    | 98,448,620  |   |                  |    | 99,421,332  |      |  |    | 106,047,642 | 
|Licenses and trademarks, net (Note 7)                          |  |                    | 1,048,181   |   |                  |    | 1,150,243   |      |  |    | 739,403     | 
|Equity investments (Note 8)                                    |  |                    | 1,585,330   |   |                  |    | 1,389,419   |      |  |    | 1,741,950   | 
|Net projected asset (Note 12)                                  |  |                    | 22,327,733  |   |                  |    | 16,290,368  |      |  |    | 15,214,802  | 
|Goodwill                                                       |  |                    | 103,289     |   |                  |    | 103,289     |      |  |    |             | 
|Other assets, net                                              |  |                    | 1,016,629   |   |                  |    | 1,157,347   |      |  |    | 1,408,062   | 
|                                                               |  |                    |             |   |                  |    |             |      |  |    |             | 
|Total assets                                                   |  | P.                 | 160,760,958 |   |                  | P. | 155,741,152 |      |  | P. | 176,801,658 | 
|                                                               |  |                    |             |   |                  |    |             |      |  |    |             | 
|                                                               |  |                    |            
|Liabilities and equity                                         |  |                    |             |   |                  |    |             |      |  |    |             | 
|Current liabilities:                                           |  |                    |             |   |                  |    |             |      |  |    |             | 
|Short-term debt and current portion of long-term debt (Note 9) |  | P.                 | 12,675,567  |   |                  | P. | 11,951,532  |      |  | P. | 19,768,894  | 
|Accounts payable and accrued liabilities (Note 10)             |  |                    | 19,008,168  |   |                  |    | 15,285,542  |      |  |    | 13,396,702  | 
|Derivative financial instruments (Note 9)                      |  |                    | 1,496,359   |   |                  |    | 1,547,054   |      |  |    | 848,824     | 
|Taxes payable                                                  |  |                    | 1,325,773   |   |                  |    | 2,443,268   |      |  |    | 2,211,626   | 
|Deferred revenues (Note 11)                                    |  |                    | 1,279,312   |   |                  |    | 916,092     |      |  |    | 1,100,052   | 
|                                                               |  |                    |             |   |                  |    |             |      |  |    |             | 
|Total current liabilities                                      |  |                    | 35,785,179  |   |                  |    | 32,143,488  |      |  |    | 37,326,098  | 
|                                                               |  |                    |            
|Long-term debt (Note 9)                                        |  |                    | 59,117,493  |   |                  |    | 62,569,413  |      |  |    | 83,105,454  | 
|Deferred taxes (Note 17)                                       |  |                    | 15,616,261  |   |                  |    | 14,641,399  |      |  |    | 15,721,097  | 
|Deferred revenues (Note 11)                                    |  |                    | 1,128,625   |   |                  |    | 611,873     |      |  |    | 457,800     | 
|                                                               |  |                    |             |   |                  |    |             |      |  |    |             | 
|Total liabilities                                              |  |                    | 111,647,558 |   |                  |    | 109,966,173 |      |  |    | 136,610,449 | 
|                                                               |  |                    |             |   |                  |    |             |      |  |    |             | 
|                                                               |  |                    |            
|Equity (Note 16):                                              |  |                    |             |   |                  |    |             |      |  |    |             | 
|Capital stock                                                  |  |                    | 5,441,295   |   |                  |    | 5,467,035   |      |  |    | 5,473,815   | 
|Retained earnings:                                             |  |                    |             |   |                  |    |             |      |  |    |             | 
|Prior years                                                    |  |                    | 28,854,042  |   |                  |    | 24,697,153  |      |  |    | 33,942,104  | 
|Current year                                                   |  |                    | 14,581,674  |   |                  |    | 15,188,553  |      |  |    |             | 
|                                                               |  |                    |             |   |                  |    |             |      |  |    |             | 
|                                                               |  |                    | 43,435,716  |   |                  |    | 39,885,706  |      |  |    | 33,942,104  | 
|Accumulated other comprehensive income items                   |  |                    | (97,773     | ) |                  |    | 112,881     |      |  |    | 733,200     | 
|                                                               |  |                    |             |   |                  |    |             |      |  |    |             | 
|Equity attributable to equity holders of the parent            |  |                    | 48,779,238  |   |                  |    | 45,465,622  |      |  |    | 40,149,119  | 
|Non-controlling interest                                       |  |                    | 334,162     |   |                  |    | 309,357     |      |  |    | 42,090      | 
|                                                               |  |                    |             |   |                  |    |             |      |  |    |             | 
|Total equity                                                   |  |                    | 49,113,400  |   |                  |    | 45,774,979  |      |  |    | 40,191,209  | 
|                                                               |  |                    |             |   |                  |    |             |      |  |    |             | 
|Total liabilities and equity                                   |  | P.                 | 160,760,958 |   |                  | P. | 155,741,152 |      |  | P. | 176,801,658 | 
|                                                               |  |                    |             |   |                  |    |             |      |  |    |             | 

The accompanying notes are an integral part of these financial statements.



F-2



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Consolidated Statements of Income

(In thousands of Mexican pesos, except for earnings per share)



|                                                                                                                                                   |  |                                |             |   |      |    |             |  
|-------------------------------------------------------------------------------------------------------------------------------------------------- |  | ------------------------------ | ----------- | - | ---- | -- | ----------- | -
|                                                                                                                                                   |  | For the years
endedDecember 31 |            
|                                                                                                                                                   |  | 2011                           |             |   | 2010 |   
|Operating revenues:                                                                                                                                |  |                                |             |   |      |    |             |  
|Local service                                                                                                                                      |  | P.                             | 38,532,134  |   |      | P. | 41,006,772  |  
|Long distance service:                                                                                                                             |  |                                |             |   |      |    |             |  
|Domestic                                                                                                                                           |  |                                | 11,844,937  |   |      |    | 12,264,837  |  
|International                                                                                                                                      |  |                                | 5,990,456   |   |      |    | 5,646,278   |  
|Interconnection service                                                                                                                            |  |                                | 12,159,529  |   |      |    | 15,022,721  |  
|Data                                                                                                                                               |  |                                | 36,472,290  |   |      |    | 32,877,711  |  
|Other                                                                                                                                              |  |                                | 7,066,712   |   |      |    | 6,743,789   |  
|                                                                                                                                                   |  |                                |             |   |      |    |             |  
|                                                                                                                                                   |  |                                | 112,066,058 |   |      |    | 113,562,108 |  
|                                                                                                                                                   |  |                                |             |   |      |    |             |  
|Operating costs and expenses:                                                                                                                      |  |                                |             |   |      |    |             |  
|Costs of sales and services                                                                                                                        |  |                                | 38,112,775  |   |      |    | 34,579,540  |  
|Commercial, administrative y general expenses                                                                                                      |  |                                | 22,381,383  |   |      |    | 22,296,801  |  
|Interconnection                                                                                                                                    |  |                                | 6,549,218   |   |      |    | 10,561,053  |  
|Depreciation and amortization (Notes 6 and 7) (includes P.16,548,528 in 2011 and P.16,920,793 in 2010, not included in cost of
sales and services) |  |                                | 16,936,390  |   |      |    | 17,500,371  |  
|Other expenses, net (Note 3s)                                                                                                                      |  |                                | 1,504,204   |   |      |    | 565,366     |  
|                                                                                                                                                   |  |                                |             |   |      |    |             |  
|                                                                                                                                                   |  |                                | 85,483,970  |   |      |    | 85,503,131  |  
|                                                                                                                                                   |  |                                |             |   |      |    |             |  
|Operating profit                                                                                                                                   |  |                                | 26,582,088  |   |      |    | 28,058,977  |  
|                                                                                                                                                   |  |                                |             |   |      |    |             |  
|                                                                                                                                                   |  |                               
|Financing cost:                                                                                                                                    |  |                                |             |   |      |    |             |  
|Interest income                                                                                                                                    |  |                                | (385,767    | ) |      |    | (583,761    | )
|Interest expense (Note 9)                                                                                                                          |  |                                | 4,942,014   |   |      |    | 5,732,227   |  
|Exchange loss (gain), net (Note 9)                                                                                                                 |  |                                | 205,136     |   |      |    | (394,470    | )
|                                                                                                                                                   |  |                                |             |   |      |    |             |  
|                                                                                                                                                   |  |                                | 4,761,383   |   |      |    | 4,753,996   |  
|                                                                                                                                                   |  |                                |             |   |      |    |             |  
|                                                                                                                                                   |  |                               
|Equity interest in net profit of associated companies (Note 8)                                                                                     |  |                                | 115,071     |   |      |    | 195,910     |  
|                                                                                                                                                   |  |                                |             |   |      |    |             |  
|                                                                                                                                                   |  |                               
|Profit before income tax                                                                                                                           |  |                                | 21,935,776  |   |      |    | 23,500,891  |  
|Income tax (Note 17)                                                                                                                               |  |                                | 7,333,209   |   |      |    | 8,325,045   |  
|                                                                                                                                                   |  |                                |             |   |      |    |             |  
|                                                                                                                                                   |  |                               
|Net profit                                                                                                                                         |  | P.                             | 14,602,567  |   |      | P. | 15,175,846  |  
|                                                                                                                                                   |  |                                |             |   |      |    |             |  
|                                                                                                                                                   |  |                               
|Net profit attributable to:                                                                                                                        |  |                                |             |   |      |    |             |  
|Equity holders of the parent                                                                                                                       |  | P.                             | 14,581,674  |   |      | P. | 15,188,553  |  
|Non-controlling interest                                                                                                                           |  |                                | 20,893      |   |      |    | (12,707     | )
|                                                                                                                                                   |  |                                |             |   |      |    |             |  
|                                                                                                                                                   |  | P.                             | 14,602,567  |   |      | P. | 15,175,846  |  
|                                                                                                                                                   |  |                                |             |   |      |    |             |  
|                                                                                                                                                   |  |                               
|Weighted average number of shares issued and outstanding (millions)                                                                                |  |                                | 18,058      |   |      |    | 18,189      |  
|                                                                                                                                                   |  |                                |             |   |      |    |             |  
|                                                                                                                                                   |  |                               
|Earnings per share attributable to equity holders of the parent                                                                                    |  | P.                             | 0.808       |   |      | P. | 0.835       |  
|                                                                                                                                                   |  |                                |             |   |      |    |             |  

The accompanying notes are an integral part of these financial statements.



F-3



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Consolidated Statements of Comprehensive Income

(In thousands of Mexican pesos)



|                                          |  |                                |            |   |      |    |            |  
|----------------------------------------- |  | ------------------------------ | ---------- | - | ---- | -- | ---------- | -
|                                          |  | For the years endedDecember 31 |           
|                                          |  | 2011                           |            |   | 2010 |   
|                                          |  |                               
|Net profit                                |  | P.                             | 14,602,567 |   |      | P. | 15,175,846 |  
|                                          |  |                               
|Other comprehensive income items:         |  |                                |            |   |      |    |            |  
|Changes in fair value of swaps            |  |                                | (441,108   | ) |      |    | (938,452   | )
|Deferred taxes                            |  |                                | 123,510    |   |      |    | 262,767    |  
|                                          |  |                                |            |   |      |    |            |  
|Net                                       |  |                                | (317,598   | ) |      |    | (675,685   | )
|Effect of translation of foreign entities |  |                                | 110,856    |   |      |    | 55,366     |  
|                                          |  |                                |            |   |      |    |            |  
|Total other comprehensive income items    |  |                                | (206,742   | ) |      |    | (620,319   | )
|                                          |  |                                |            |   |      |    |            |  
|                                          |  |                               
|Total other comprehensive income          |  | P.                             | 14,395,825 |   |      | P. | 14,555,527 |  
|                                          |  |                                |            |   |      |    |            |  
|                                          |  |                               
|Comprehensive income attributable to:     |  |                                |            |   |      |    |            |  
|Equity holders of the parent              |  | P.                             | 14,371,020 |   |      | P. | 14,568,234 |  
|Non-controlling interest                  |  |                                | 24,805     |   |      |    | (12,707    | )
|                                          |  |                                |            |   |      |    |            |  
|                                          |  | P.                             | 14,395,825 |   |      | P. | 14,555,527 |  
|                                          |  |                                |            |   |      |    |            |  

The accompanying notes are integral part of these financial statements.



F-4



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Consolidated Statements of Changes in Equity

For the years ended December 31, 2011 y 2010

(In thousands of Mexican pesos)



|                                                             |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              |            |   |                                        |    |            |                                        |  |    |                                           |   |  |                         |         |  |             |    |            |   |  |    |         |   |  |    |            |  
|------------------------------------------------------------ |  | ------------ | --------- | - | ----------------- | -- | --------- | ------------------------------ |  | -- | -------------- |  |  | ------------ | ---------- | - | -------------------------------------- | -- | ---------- | -------------------------------------- |  | -- | ----------------------------------------- | - |  | ----------------------- | ------- |  | ----------- | -- | ---------- | - |  | -- | ------- | - |  | -- | ---------- | -
|                                                             |  |              |           |   | Retained earnings |    |           | Effects ofderivative
financial |  |    |                |  |  | Total equity |            |   |                                        |    |            |                                        | 
|                                                             |  | Capitalstock |           |   | Legalreserve      |    |           | InitialIFRSadoptioneffect      |  |    | Unappropriated |  |  | Total        |            |   | instrumentsacquiredfor
hedgingpurposes |    |            | Effect oftranslationof foreignentities |  |    | attributableto equityholders
ofthe parent |   |  | Non-controllinginterest |         |  | Totalequity |   
|Balance at January 1, 2010                                   |  | P.           | 5,473,815 |   |                   | P. | 1,094,763 |                                |  | P. | 6,352,085      |  |  | P.           | 26,495,256 |   |                                        | P. | 33,942,104 |                                        |  | P. | 733,200                                   |   |  | P.                      |         |  |             | P. | 40,149,119 |   |  | P. | 42,090  |   |  | P. | 40,191,209 |  
|Comprehensive income :                                       |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              |            |   |                                        |    |            |                                        |  |    |                                           |   |  |                         |         |  |             |    |            |   |  |    |         |   |  |    |            |  
|Net profit for the year                                      |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              | 15,188,553 |   |                                        |    | 15,188,553 |                                        |  |    |                                           |   |  |                         |         |  |             |    | 15,188,553 |   |  |    | (12,707 | ) |  |    | 15,175,846 |  
|Other comprehensive income items:                            |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              |            |   |                                        |    |            |                                        |  |    |                                           |   |  |                         |         |  |             |    |            |   |  |    |         |   |  |    |            |  
|Changes in fair value of swaps, net of deferred taxes        |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              |            |   |                                        |    |            |                                        |  |    | (675,685                                  | ) |  |                         |         |  |             |    | (675,685   | ) |  |    |         |   |  |    | (675,685   | )
|Effect of translation of foreign entities                    |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              |            |   |                                        |    |            |                                        |  |    |                                           |   |  |                         | 55,366  |  |             |    | 55,366     |   |  |    |         |   |  |    | 55,366     |  
|                                                             |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              |            |  
|Comprehensive income for the year                            |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              | 15,188,553 |   |                                        |    | 15,188,553 |                                        |  |    | (675,685                                  | ) |  |                         | 55,366  |  |             |    | 14,568,234 |   |  |    | (12,707 | ) |  |    | 14,555,527 |  
|Application of earnings approved by shareholders:            |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              |            |   |                                        |    |            |                                        |  |    |                                           |   |  |                         |         |  |             |    |            |   |  |    |         |   |  |    |            |  
|Cash dividends declared                                      |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              | (8,911,909 | ) |                                        |    | (8,911,909 | )                                      |  |    |                                           |   |  |                         |         |  |             |    | (8,911,909 | ) |  |    |         |   |  |    | (8,911,909 | )
|Cash purchases of Companys own shares                       |  |              | (6,780    | ) |                   |    |           |                                |  |    |                |  |  |              | (333,042   | ) |                                        |    | (333,042   | )                                      |  |    |                                           |   |  |                         |         |  |             |    | (339,822   | ) |  |    |         |   |  |    | (339,822   | )
|Non-controlling interest arising from a business combination |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              |            |   |                                        |    |            |                                        |  |    |                                           |   |  |                         |         |  |             |    |            |   |  |    | 279,974 |   |  |    | 279,974    |  
|                                                             |  |              |           |  
|Balance at December 31, 2010                                 |  |              | 5,467,035 |   |                   |    | 1,094,763 |                                |  |    | 6,352,085      |  |  |              | 32,438,858 |   |                                        |    | 39,885,706 |                                        |  |    | 57,515                                    |   |  |                         | 55,366  |  |             |    | 45,465,622 |   |  |    | 309,357 |   |  |    | 45,774,979 |  
|Comprehensive income:                                        |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              |            |   |                                        |    |            |                                        |  |    |                                           |   |  |                         |         |  |             |    |            |   |  |    |         |   |  |    |            |  
|Net profit for the year                                      |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              | 14,581,674 |   |                                        |    | 14,581,674 |                                        |  |    |                                           |   |  |                         |         |  |             |    | 14,581,674 |   |  |    | 20,893  |   |  |    | 14,602,567 |  
|Other comprehensive income items:                            |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              |            |   |                                        |    |            |                                        |  |    |                                           |   |  |                         |         |  |             |    |            |   |  |    |         |   |  |    |            |  
|Changes in fair value of swaps, net of deferred taxes        |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              |            |   |                                        |    |            |                                        |  |    | (317,598                                  | ) |  |                         |         |  |             |    | (317,598   | ) |  |    |         |   |  |    | (317,598   | )
|Effect of translation of foreign entities                    |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              |            |   |                                        |    |            |                                        |  |    |                                           |   |  |                         | 106,944 |  |             |    | 106,944    |   |  |    | 3,912   |   |  |    | 110,856    |  
|                                                             |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              |            |  
|Comprehensive income for the year                            |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              | 14,581,674 |   |                                        |    | 14,581,674 |                                        |  |    | (317,598                                  | ) |  |                         | 106,944 |  |             |    | 14,371,020 |   |  |    | 24,805  |   |  |    | 14,395,825 |  
|Application of earnings approved by shareholders:            |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              |            |   |                                        |    |            |                                        |  |    |                                           |   |  |                         |         |  |             |    |            |   |  |    |         |   |  |    |            |  
|Cash dividends declared                                      |  |              |           |   |                   |    |           |                                |  |    |                |  |  |              | (9,698,631 | ) |                                        |    | (9,698,631 | )                                      |  |    |                                           |   |  |                         |         |  |             |    | (9,698,631 | ) |  |    |         |   |  |    | (9,698,631 | )
|Cash purchases of Companys own shares                       |  |              | (25,740   | ) |                   |    |           |                                |  |    |                |  |  |              | (1,333,033 | ) |                                        |    | (1,333,033 | )                                      |  |    |                                           |   |  |                         |         |  |             |    | (1,358,773 | ) |  |    |         |   |  |    | (1,358,773 | )
|                                                             |  |              |           |  
|Balance at December 31, 2011 (Note 16)                       |  | P.           | 5,441,295 |   |                   | P. | 1,094,763 |                                |  | P. | 6,352,085      |  |  | P.           | 35,988,868 |   |                                        | P. | 43,435,716 |                                        |  | P. | (260,083                                  | ) |  | P.                      | 162,310 |  |             | P. | 48,779,238 |   |  | P. | 334,162 |   |  | P. | 49,113,400 |  
|                                                             |  |              |           |  

The accompanying notes are an integral part of these financial statements.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Consolidated Statements of Cash Flows

(In thousands of Mexican pesos)



|                                                                      |  |                                |             |   |      |    |             |  
|--------------------------------------------------------------------- |  | ------------------------------ | ----------- | - | ---- | -- | ----------- | -
|                                                                      |  | For the years
endedDecember 31 |            
|                                                                      |  | 2011                           |             |   | 2010 |   
|Operating Activities:                                                 |  |                                |             |   |      |    |             |  
|Profit before income tax                                              |  | P.                             | 21,935,776  |   |      | P. | 23,500,891  |  
|Plus (less) items not requiring the use of cash:                      |  |                                |             |   |      |    |             |  
|Depreciation                                                          |  |                                | 16,817,621  |   |      |    | 17,392,411  |  
|Amortization                                                          |  |                                | 118,769     |   |      |    | 107,960     |  
|Reserve for obsolete inventories for operation of the telephone plant |  |                                | 88,015      |   |      |    | 101,462     |  
|Equity interest in net income of associated companies                 |  |                                | (115,071    | ) |      |    | (195,910    | )
|Gain on sale of associated company                                    |  |                                |             |   |      |    | (353,306    | )
|Provisions for employee benefits                                      |  |                                | 7,128,586   |   |      |    | 7,361,813   |  
|Interest expense                                                      |  |                                | 3,396,386   |   |      |    | 3,537,734   |  
|Exchange gain, net                                                    |  |                                | 4,774,002   |   |      |    | (2,852,652  | )
|Valuation of derivatives, net (Note 9)                                |  |                                | (3,067,706  | ) |      |    | 4,400,236   |  
|Others                                                                |  |                                |             |   |      |    | 509         |  
|                                                                      |  |                                |             |   |      |    |             |  
|                                                                      |  |                                | 51,076,378  |   |      |    | 53,001,148  |  
|Changes in operating assets and liabilities:                          |  |                                |             |   |      |    |             |  
|(Increase) decrease in:                                               |  |                                |             |   |      |    |             |  
|Accounts receivable                                                   |  |                                | (1,444,753  | ) |      |    | 1,350,844   |  
|Inventories                                                           |  |                                | 200,519     |   |      |    | (335,477    | )
|Prepaid expenses and other current assets                             |  |                                | (1,572,519  | ) |      |    | 172,071     |  
|Other assets                                                          |  |                                | 139,994     |   |      |    | 277,488     |  
|(Decrease) increase in:                                               |  |                                |             |   |      |    |             |  
|Employee benefits:                                                    |  |                                |             |   |      |    |             |  
|Contributions to trust fund                                           |  |                                |             |   |      |    | (289        | )
|Benefits paid to employees                                            |  |                                | (11,472,579 | ) |      |    | (6,438,985  | )
|Accounts payable and accrued liabilities                              |  |                                | 172,409     |   |      |    | (1,524,977  | )
|Taxes on profits                                                      |  |                                | (9,699,789  | ) |      |    | (6,916,875  | )
|Taxes payable                                                         |  |                                | (1,117,495  | ) |      |    | 13,942      |  
|Deferred revenues                                                     |  |                                | 879,972     |   |      |    | (31,893     | )
|                                                                      |  |                                |             |   |      |    |             |  
|Net cash flows provided by operating activities                       |  |                                | 27,162,137  |   |      |    | 39,566,997  |  
|                                                                      |  |                                |             |   |      |    |             |  
|                                                                      |  |                               
|Investing activities:                                                 |  |                                |             |   |      |    |             |  
|Acquisition of property, plant and equipment                          |  |                                | (14,211,587 | ) |      |    | (9,362,448  | )
|Acquisition of licenses                                               |  |                                | (15,983     | ) |      |    | (6,620      | )
|Acquisition of equity investments                                     |  |                                |             |   |      |    | (285,181    | )
|Sale of equity investments                                            |  |                                |             |   |      |    | 669,387     |  
|Dividends received from associated companies                          |  |                                | 3,991       |   |      |    | 126,000     |  
|                                                                      |  |                                |             |   |      |    |             |  
|Net cash flows used in investing activities                           |  |                                | (14,223,579 | ) |      |    | (8,858,862  | )
|                                                                      |  |                                |             |   |      |    |             |  
|Cash surplus to be applied to financing activities                    |  |                                | 12,938,558  |   |      |    | 30,708,135  |  
|                                                                      |  |                                |             |   |      |    |             |  
|                                                                      |  |                               
|Financing activities:                                                 |  |                                |             |   |      |    |             |  
|New loans                                                             |  |                                | 18,635,000  |   |      |    | 10,135,980  |  
|Repayment of loans                                                    |  |                                | (26,138,439 | ) |      |    | (35,727,693 | )
|Bond purchase premium paid                                            |  |                                | (338,833    | ) |      |    |             |  
|Cash purchases of Companys own shares                                |  |                                | (1,358,773  | ) |      |    | (339,822    | )
|Dividends paid                                                        |  |                                | (9,508,964  | ) |      |    | (8,736,965  | )
|Derivative financial instruments                                      |  |                                | 3,158,678   |   |      |    | 826,850     |  
|Interest paid                                                         |  |                                | (3,085,688  | ) |      |    | (3,752,788  | )
|                                                                      |  |                                |             |   |      |    |             |  
|Net cash flows used in financing activities                           |  |                                | (18,637,019 | ) |      |    | (37,594,438 | )
|                                                                      |  |                                |             |   |      |    |             |  
|                                                                      |  |                               
|Net decrease in cash and cash equivalents                             |  |                                | (5,698,461  | ) |      |    | (6,886,303  | )
|Cash and cash equivalents at beginning of year                        |  |                                | 7,493,465   |   |      |    | 14,379,768  |  
|                                                                      |  |                                |             |   |      |    |             |  
|Cash and cash equivalents at end of year                              |  | P.                             | 1,795,004   |   |      | P. | 7,493,465   |  
|                                                                      |  |                                |             |   |      |    |             |  
|                                                                      |  |                               
|Non-cash transactions related to investing activities:                |  |                                |             |   |      |    |             |  
|Property, plant and equipment                                         |  | P.                             | 1,695,312   |   |      | P. | 1,393,673   |  

The accompanying notes are an integral part of these financial statements



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|1. | Description of the Business and Significant Events
|-- | --------------------------------------------------



|I. | Description of the Business
|-- | ---------------------------

Teléfonos de México, S.A.B. de C.V. and its subsidiaries (collectively the Company or TELMEX) provide telecommunications services, primarily in Mexico, including
domestic and international long distance and local telephone services, data services, the connection of customers with cellular networks (calling party pays), as well as the interconnection of domestic long distance carriers cellular telephone
companies and local service carriers networks with the TELMEX local network. TELMEX also obtains revenues from the sale of telephone equipment and personal computers.

The amended Mexican government concession under which TELMEX operates was signed on August 10, 1990. The concession runs through the
year 2026, but it may be renewed for an additional period of fifteen years. Among other significant aspects, the concession stipulates the requirements for providing telephony services and establishes the basis for regulating prices.

The prices to be charged for basic telephone services are subject to a cap determined by the Federal Telecommunications Commission
(COFETEL). During the last eleven years, TELMEX management decided not to raise its prices for basic services.

TELMEX has
concessions in Mexico to operate radio spectrum wave frequency bands to provide fixed wireless telephone services and to operate radio spectrum wave frequency bands for point-to-point and point-to-multipoint microwave communications.

The foreign subsidiary has licenses for use of point-to-point and point-to-multipoint links in the U.S.A.

The Corporate offices of the Company are located at Parque Vía 190, Colonia Cuauhtémoc, C.P. 06599, Mexico City, Mexico and
its corporate website is www.telmex.com.

On April 17, 2012, TELMEXs Audit Committee, Chief Executive Officer,
General Counsel and Chief Financial Officer authorized the issuance of the accompanying consolidated financial statements and these notes as of December 31, 2011 and 2010, and as of January 1 2010, for each of the two years in the period
ended December 31, 2011, and Management evaluated subsequent events through April 26, 2012.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|1. | Description of the Business and Significant Events (concluded)
|-- | --------------------------------------------------------------



|II. | Significant Events
|--- | ------------------

a)
Public Offers

On May 11, 2010, América Móvil, S.A.B. de C.V. (América Móvil) launched two
concurrent public exchange offers to acquire the outstanding shares of Carso Global Telecom, S.A.B. de C.V. (Carso Global Telecom), which was TELMEXs controlling shareholder, and Telmex Internacional, S.A.B de C.V.. Carso Global Telecom was
the direct holder of 59.4% of the outstanding shares of TELMEX. On June 16, 2010, América Móvil completed the acquisition of 99.4% of the outstanding shares of Carso Global Telecom, by means of a first public exchange offer. As a
result, América Móvil indirectly owned 59.1% of the outstanding shares of TELMEX. Upon completion of this transaction, TELMEX became a subsidiary of América Móvil.

On October 11, 2011, América Móvil launched a public tender offer to acquire the outstanding shares of TELMEX, of
which it was not already the direct or indirect holder. On November 11, 2011, América Móvil concluded the public tender offer to acquire the shares, and as a result of that offer, its direct and indirect ownership of the
outstanding shares of TELMEX increased to 92.99%.

b) On December 19, 2011, at the Extraordinary General Meeting, the
shareholders approved to proceed to delist and/ or cancel the registry or inscription of TELMEX ́s shares or American Depositary Shares (ADSs), from the New York Stock Exchange (NYSE) and the NASDAQ Capital Market
(NASDAQ) and its L Shares from the Mercado de Valores Latinoamericano en Eurosin Madrid, Spain (Latibex), and to terminate its American Depositary Receipt (ADRs) programs. On January 31, 2012, TELMEX
filed Form 25 with the U.S. Securities and Exchange Commission, after which TELMEXs ADSs ended trading on the NYSE and NASDAQ. On the same date, TELMEX ended trading its L shares on Latibex. However, TELMEX shares will continue to be traded on
the Bolsa Mexicana de Valores(Mexican Stock Exchange). On April 25, 2012, at the Extraordinary General Meeting, the shareholders approved the deregistration of the Companys securities from the National Securities Registry
(Registro Nacional de Valores)and the delisting from the Mexican Stock Exchange.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|2. | Adoption of International Financial Reporting Standards (IFRS)
|-- | --------------------------------------------------------------

The Company, with the respective authorization of its Board of Directors, Audit Committee, the Mexican Stock Exchange and the Mexican National Banking and Securities Commission, decided to adopt IFRS as
issued by the International Accounting Standards Board (IASB) as of December 31, 2011, using a transition date as of January 1, 2010. As a result, the accompanying financial statements and the notes thereto have been prepared
in accordance with IFRS.

The Companys 2010 annual financial statements were prepared in conformity with Mexican
Financial Reporting Standards (Mexican FRS). Mexican FRS differ in some aspects with IFRS. In the following paragraphs the effects of IFRS adoption on the financial statements previously issued under Mexican FRS are explained. Also, the
reconciliations of the statements of financial position as of January 1, 2010 and December 31, 2010, as well as, the reconciliation of the statement of income for the year ended December 2010, which were previously prepared under Mexican
FRS and modified in accordance with IFRS since the transition date, are included.

The financial statement transition has been
carried out with the application of IFRS 1 First time adoption of International Financial Reporting Standards. This standard provides mandatory exceptions which prohibit the retroactive adoption of IFRS in some areas, particularly those
in which retroactive adoption requires management professional judgment on past conditions after the transactions endings were already known.

The Company is a consolidated subsidiary of América Móvil. América Móvil adopted IFRS on December 31, 2010, with a transition date to IFRS of January 1, 2009. The
Company is carrying forward in these financial statements, the IFRS adoption amounts of its assets and liabilities which were included in its América Móvils consolidated statement of financial position at their date of transition
to IFRS, as permitted under IFRS 1.

TELMEX is applying the mandatory exceptions established in IFRS 1 for the retroactive
application of other standards as of the transition date. Those IFRS are related to the following concepts:



|1. | Determination of estimates
|-- | --------------------------



|2. | Derecognition of financial assets and liabilities
|-- | -------------------------------------------------



|3. | Hedge accounting
|-- | ----------------



|4. | Non-controlling interest
|-- | ------------------------



|5. | Classification and measurements of financial assets
|-- | ---------------------------------------------------

IFRS 1 also establishes optional exemptions to not retrospectively apply IFRS, in specific areas where the costs of complying with this requirement may exceed the benefits to be gained by users of the
financial statements.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|2. | Adoption of International Financial Reporting Standards (IFRS) (continued)
|-- | --------------------------------------------------------------------------



The Company is applying the following optional exemptions:

a) Deemed cost

In
accordance with IFRS 1, an entity may elect to measure an item of property, plant and equipment at the date of transition to IFRS at its fair value and use that fair value as its deemed cost at that date.

A first-time adopter may elect to use a previous GAAP revaluation of an item of property, plant and equipment at, or before, the date of
transition to IFRS as deemed cost at the date of the revaluation, if the revaluation was, at the date of the revaluation, broadly comparable to:



|(a) | Fair value; or
|--- | --------------



|(b) | Cost or depreciated cost in accordance with IFRS, adjusted to reflect, for example, changes in a general or specific price index.
|--- | ---------------------------------------------------------------------------------------------------------------------------------

TELMEX decided to use the revalued cost of property, plant and equipment at January 1, 2009, determined in accordance with Mexican
FRS, which includes the inflation effects through December 31, 2007, as their deemed cost for purposes of its América Móvils consolidated statement of financial position. Those deemed cost values, along with 2009
acquisitions, disposals and depreciation have been carried forward as the carrying value of property, plant and equipment at TELMEXs January 1, 2010 transition date to IFRS.

b) Employee benefits

Cumulative actuarial losses

According to IAS 19, Employee Benefits, an entity may elect to use a corridor approach that leaves some actuarial gains and
losses unrecognized. Retrospective application of this approach requires an entity to split the cumulative actuarial gains and losses from the inception of the plan until the date of transition to IFRS into a recognized portion and an unrecognized
portion.

However, a first-time adopter may elect to recognize all cumulative actuarial gains and losses at the date of
transition to IFRS, even if it uses the corridor approach for later actuarial gains and losses.

TELMEX decided to apply
retrospectively the corridor approach, therefore, the recognition of the actuarial losses and gains has been deferred. The decrease in the net projected asset of P.1,216,055 at the transition date relates to the differences in the
valuation of employee benefits between Mexican FRS and IFRS for the use of nominal rates for IFRS purposes instead of real rates as required for Mexican FRS purposes until December 31, 2007.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|2. | International Financial Reporting Standards Adoption (IFRS) (continued)
|-- | -----------------------------------------------------------------------



Deferred employee profit sharing

Mexican FRS D-3, Employee Benefits, requires the recognition of deferred employee profit sharing in the financial statements.
IFRS do not provide specific guidelines for recognizing deferred employee profit sharing, therefore, the liability for deferred employee profit sharing of P. 3,954,136, was not recognized for IFRS purposes at the transition date.

Termination benefits

Mexican FRS D-3 requires the recognition of an actuarial provision for the termination benefits of the employment relationship for other
reasons than a restructuring, while IFRS does not consider this situation. Accordingly, TELMEX reversed the liability of P.159,377 for termination benefits at the transition date.

c) Recognition of the effects of inflation on financial information

IAS 29
Financial Reporting in Hyperinflationary Economies requires the recognition of the inflation effects in the financial information when the entity operates in a hyperinflationary economic environment; one of the characteristics of a
hyperinflationary economic environment is when the cumulative inflation rate in the prior three years is equal to or exceeds 100%.

The last three-year period in which Mexico ceased to be a hyperinflationary economic was in the period from 1996 to 1998. Therefore, the Company eliminated the effects of inflation from its non-monetary
assets and liabilities, as well as from capital stock and legal reserve, recognized under Mexican FRS from January 1, 1999 through December 31, 2007.

d) Cumulative effects of translation of foreign entities

In accordance
with IFRS1, a first-time adopter need not comply with IAS 21, The Effects of Changes in Foreign Exchange Rates. TELMEX applied this exemption. Therefore, the cumulative translation effect from foreign entities determined in conformity
with Mexican FRS was deemed to be zero at the date of transition. Such amount recorded under Mexican FRS was P.134,550, net of deferred tax, at that date.

e) Credit risk of the Company and counterparty

IAS 39, Financial
Instruments: Recognition and Measurement, requires the consideration of credit risk in determining the fair value of financial instruments. Credit risk is the risk that the counterparty will not meet its contractual obligations. For the
transition to IFRS, TELMEX adjusted the fair value of the asset and liability position of the derivative financial instruments considering the credit risk of the counterparty.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|2. | International Financial Reporting Standards Adoption (IFRS) (continued)
|-- | -----------------------------------------------------------------------



Therefore, the fair value of the asset and liability position of the derivative
financial instruments is presented net of the adjustment of the credit risk valuation, which includes both TELMEXs own risk and the risk that comes from counterparties to the derivative financial instruments contracted. The credit risk amount
at the date of transition was P.137,027.

f) Deferred taxes

As a result of the exceptions applied as well as the differences previously described, there were modifications in the accounting values of certain assets and liabilities. As a consequence, the deferred
taxes were recalculated in accordance with IAS 12, Income Taxes, resulting in an increase of P.661,039 in the deferred tax liability at the IFRS transition date.

g) Statement of cash flows

The transition from Mexican FRS to IFRS did not
have a material impact on the statement of cash flows.

h) Other

The transition from Mexican FRS to IFRS did not have a material impact on the other comprehensive income items.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|2. | International Financial Reporting Standards Adoption (IFRS) (continued)
|-- | -----------------------------------------------------------------------



Reconciliation of consolidated statements of financial position at January 1,
2010 (date of transition to IFRS) and at December 31, 2010



|                                                      |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|----------------------------------------------------- |  | ------- |  | --------------------------------------- | ----------- |  | ---------------------------- | -- | ---------- | ----------------- |  | -- | ----------------------- |  |  | ---------------------------- | ----------- |  | ----------------- | -- | ---------- | - |  | -- | ----------- | 
|                                                      |  | Note2   |  | AmountsunderMexican FRS                 |             |  | Transitionadjustmentsto IFRS |    |            | Amountsunder IFRS |  |    | AmountsunderMexican FRS |  |  | Transitionadjustments toIFRS |             |  | Amountsunder IFRS |   
|                                                      |  |         |  | as of January 1, 2010 (transition date) |             |  | as of December 31, 2010      |   
|Assets                                                |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|Current Assets:                                       |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|Cash and cash equivalents                             |  |         |  | P.                                      | 14,379,768  |  |                              |    |            |                   |  | P. | 14,379,768              |  |  | P.                           | 7,493,465   |  |                   |    |            |   |  | P. | 7,493,465   | 
|Accounts receivable, net                              |  |         |  |                                         | 20,425,556  |  |                              |    |            |                   |  |    | 20,425,556              |  |  |                              | 17,118,359  |  |                   |    |            |   |  |    | 17,118,359  | 
|Derivative financial instruments                      |  | e       |  |                                         | 12,225,550  |  |                              | P. | (137,113   | )                 |  |    | 12,088,437              |  |  |                              | 6,957,018   |  |                   | P. | (261,119   | ) |  |    | 6,695,899   | 
|Inventories, net                                      |  |         |  |                                         | 1,448,102   |  |                              |    |            |                   |  |    | 1,448,102               |  |  |                              | 1,783,579   |  |                   |    |            |   |  |    | 1,783,579   | 
|Prepaid expenses and other current assets             |  | c       |  |                                         | 3,303,275   |  |                              |    | 4,661      |                   |  |    | 3,307,936               |  |  |                              | 3,121,994   |  |                   |    | 15,858     |   |  |    | 3,137,852   | 
|                                                      |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|Total current assets                                  |  |         |  |                                         | 51,782,251  |  |                              |    | (132,452   | )                 |  |    | 51,649,799              |  |  |                              | 36,474,415  |  |                   |    | (245,261   | ) |  |    | 36,229,154  | 
|                                                      |  |         |  |                                         |             |  |                             
|Property, plant and equipment , net                   |  |         |  |                                         | 106,047,642 |  |                              |    |            |                   |  |    | 106,047,642             |  |  |                              | 99,421,332  |  |                   |    |            |   |  |    | 99,421,332  | 
|Licenses and trademarks, net                          |  | c       |  |                                         | 918,341     |  |                              |    | (178,938   | )                 |  |    | 739,403                 |  |  |                              | 1,307,517   |  |                   |    | (157,274   | ) |  |    | 1,150,243   | 
|Equity investments                                    |  | c       |  |                                         | 1,775,380   |  |                              |    | (33,430    | )                 |  |    | 1,741,950               |  |  |                              | 1,392,042   |  |                   |    | (2,623     | ) |  |    | 1,389,419   | 
|Net projected asset                                   |  | b       |  |                                         | 16,430,857  |  |                              |    | (1,216,055 | )                 |  |    | 15,214,802              |  |  |                              | 17,342,200  |  |                   |    | (1,051,832 | ) |  |    | 16,290,368  | 
|Goodwill                                              |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              | 103,289     |  |                   |    |            |   |  |    | 103,289     | 
|Other assets , net                                    |  | c       |  |                                         | 1,442,330   |  |                              |    | (34,268    | )                 |  |    | 1,408,062               |  |  |                              | 1,183,363   |  |                   |    | (26,016    | ) |  |    | 1,157,347   | 
|                                                      |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|Total assets                                          |  |         |  | P.                                      | 178,396,801 |  |                              | P. | (1,595,143 | )                 |  | P. | 176,801,658             |  |  | P.                           | 157,224,158 |  |                   | P. | (1,483,006 | ) |  | P. | 155,741,152 | 
|                                                      |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|                                                      |  |         |  |                                         |             |  |                             
|Liabilities and equity                                |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|Current liabilities:                                  |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|Short-term debt and current portion of long-term debt |  |         |  | P.                                      | 19,768,894  |  |                              |    |            |                   |  | P. | 19,768,894              |  |  | P.                           | 11,951,532  |  |                   |    |            |   |  | P. | 11,951,532  | 
|Accounts payable and accrued liabilities              |  |         |  |                                         | 13,396,702  |  |                              |    |            |                   |  |    | 13,396,702              |  |  |                              | 15,285,542  |  |                   |    |            |   |  |    | 15,285,542  | 
|Derivative financial instruments                      |  | e       |  |                                         | 848,910     |  |                              | P. | (86        | )                 |  |    | 848,824                 |  |  |                              | 1,561,294   |  |                   | P. | (14,240    | ) |  |    | 1,547,054   | 
|Taxes payable                                         |  |         |  |                                         | 2,211,626   |  |                              |    |            |                   |  |    | 2,211,626               |  |  |                              | 2,443,268   |  |                   |    |            |   |  |    | 2,443,268   | 
|Deferred revenues                                     |  | c       |  |                                         | 1,104,175   |  |                              |    | (4,123     | )                 |  |    | 1,100,052               |  |  |                              | 917,377     |  |                   |    | (1,285     | ) |  |    | 916,092     | 
|                                                      |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|Total current liabilities                             |  |         |  |                                         | 37,330,307  |  |                              |    | (4,209     | )                 |  |    | 37,326,098              |  |  |                              | 32,159,013  |  |                   |    | (15,525    | ) |  |    | 32,143,488  | 
|                                                      |  |         |  |                                         |             |  |                             
|Long-term debt                                        |  |         |  |                                         | 83,105,454  |  |                              |    |            |                   |  |    | 83,105,454              |  |  |                              | 62,569,413  |  |                   |    |            |   |  |    | 62,569,413  | 
|Employee benefits                                     |  | b       |  |                                         | 4,113,513   |  |                              |    | (4,113,513 | )                 |  |    |                         |  |  |                              | 3,516,686   |  |                   |    | (3,516,686 | ) |  |    |             | 
|Deferred taxes                                        |  | f       |  |                                         | 15,060,058  |  |                              |    | 661,039    |                   |  |    | 15,721,097              |  |  |                              | 14,132,763  |  |                   |    | 508,636    |   |  |    | 14,641,399  | 
|Deferred revenues                                     |  | c       |  |                                         | 466,696     |  |                              |    | (8,896     | )                 |  |    | 457,800                 |  |  |                              | 622,351     |  |                   |    | (10,478    | ) |  |    | 611,873     | 
|                                                      |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|Total liabilities                                     |  |         |  |                                         | 140,076,028 |  |                              |    | (3,465,579 | )                 |  |    | 136,610,449             |  |  |                              | 113,000,226 |  |                   |    | (3,034,053 | ) |  |    | 109,966,173 | 
|                                                      |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|                                                      |  |         |  |                                         |             |  |                             
|Equity:                                               |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|Capital stock                                         |  | c       |  |                                         | 9,020,300   |  |                              |    | (3,546,485 | )                 |  |    | 5,473,815               |  |  |                              | 9,008,985   |  |                   |    | (3,541,950 | ) |  |    | 5,467,035   | 
|Retained earnings :                                   |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|Prior years                                           |  | c       |  |                                         | 28,375,768  |  |                              |    | (785,749   | )                 |  |    | 27,590,019              |  |  |                              | 19,135,353  |  |                   |    | (790,285   | ) |  |    | 18,345,068  | 
|Initial IFRS adoption effect                          |  |         |  |                                         |             |  |                              |    | 6,352,085  |                   |  |    | 6,352,085               |  |  |                              |             |  |                   |    | 6,352,085  |   |  |    | 6,352,085   | 
|Current year                                          |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              | 15,384,162  |  |                   |    | (195,609   | ) |  |    | 15,188,553  | 
|                                                      |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|                                                      |  |         |  |                                         | 28,375,768  |  |                              |    | 5,566,336  |                   |  |    | 33,942,104              |  |  |                              | 34,519,515  |  |                   |    | 5,366,191  |   |  |    | 39,885,706  | 
|                                                      |  |         |  |                                         |             |  |                             
|Accumulated other comprehensive income items          |  | b, d, e |  |                                         | 883,225     |  |                              |    | (150,025   | )                 |  |    | 733,200                 |  |  |                              | 386,109     |  |                   |    | (273,228   | ) |  |    | 112,881     | 
|                                                      |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|Equity attributable to equity holders of the parent   |  |         |  |                                         | 38,279,293  |  |                              |    | 1,869,826  |                   |  |    | 40,149,119              |  |  |                              | 43,914,609  |  |                   |    | 1,551,013  |   |  |    | 45,465,622  | 
|Non-controlling interest                              |  |         |  |                                         | 41,480      |  |                              |    | 610        |                   |  |    | 42,090                  |  |  |                              | 309,323     |  |                   |    | 34         |   |  |    | 309,357     | 
|                                                      |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|Total equity                                          |  |         |  |                                         | 38,320,773  |  |                              |    | 1,870,436  |                   |  |    | 40,191,209              |  |  |                              | 44,223,932  |  |                   |    | 1,551,047  |   |  |    | 45,774,979  | 
|                                                      |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 
|Total liabilities and equity                          |  |         |  | P.                                      | 178,396,801 |  |                              | P. | (1,595,143 | )                 |  | P. | 176,801,658             |  |  | P.                           | 157,224,158 |  |                   | P. | (1,483,006 | ) |  | P. | 155,741,152 | 
|                                                      |  |         |  |                                         |             |  |                              |    |            |                   |  |    |                         |  |  |                              |             |  |                   |    |            |   |  |    |             | 



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|2. | International Financial Reporting Standards Adoption (IFRS) (concluded)
|-- | -----------------------------------------------------------------------

Reconciliation of consolidated statement of income for the year ended December 31, 2010



|                                                      |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|----------------------------------------------------- |  | ----- |  | --------------------------------------- | ----------- | - | ---------------------------- |  | -------- | ----------------- |  | -- | ----------- | -
|                                                      |  | Note2 |  | AmountsunderMexican FRS                 |             |   | Transitionadjustments toIFRS |  |          | Amountsunder IFRS | 
|                                                      |  |       |  | for the year ended on December 31, 2010 |            
|Operating revenues:                                   |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|Local service                                         |  |       |  | P.                                      | 41,006,772  |   |                              |  |          |                   |  | P. | 41,006,772  |  
|Long distance service:                                |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|Domestic                                              |  |       |  |                                         | 12,264,837  |   |                              |  |          |                   |  |    | 12,264,837  |  
|International                                         |  |       |  |                                         | 5,646,278   |   |                              |  |          |                   |  |    | 5,646,278   |  
|Interconnection                                       |  |       |  |                                         | 15,022,721  |   |                              |  |          |                   |  |    | 15,022,721  |  
|Data                                                  |  | c     |  |                                         | 32,878,968  |   |                              |  | (1,257   | )                 |  |    | 32,877,711  |  
|Others                                                |  |       |  |                                         | 6,743,789   |   |                              |  |          |                   |  |    | 6,743,789   |  
|                                                      |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|                                                      |  |       |  |                                         | 113,563,365 |   |                              |  | (1,257   | )                 |  |    | 113,562,108 |  
|                                                      |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|Operating costs and expenses:                         |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|Cost of sales and services                            |  | b, c  |  |                                         | 34,710,580  |   |                              |  | (131,040 | )                 |  |    | 34,579,540  |  
|Commercial, administrative and general expenses       |  | b, c  |  |                                         | 22,351,181  |   |                              |  | (54,380  | )                 |  |    | 22,296,801  |  
|Interconnection                                       |  |       |  |                                         | 10,561,053  |   |                              |  |          |                   |  |    | 10,561,053  |  
|Depreciation and amortization                         |  | c     |  |                                         | 17,523,330  |   |                              |  | (22,959  | )                 |  |    | 17,500,371  |  
|Other expenses, net                                   |  | b     |  |                                         |             |   |                              |  | 565,366  |                   |  |    | 565,366     |  
|                                                      |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|                                                      |  |       |  |                                         | 85,146,144  |   |                              |  | 356,987  |                   |  |    | 85,503,131  |  
|                                                      |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|Operating profit                                      |  |       |  |                                         | 28,417,221  |   |                              |  | (358,244 | )                 |  |    | 28,058,977  |  
|                                                      |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|                                                      |  |       |  |                                        
|Others expenses, net                                  |  | b     |  |                                         | 78,337      |   |                              |  | (78,337  | )                 |  |    |             |  
|                                                      |  |       |  |                                        
|Financing cost:                                       |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|                                                      |  |       |  |                                        
|Interest income                                       |  |       |  |                                         | (583,761    | ) |                              |  |          |                   |  |    | (583,761    | )
|Interest expense                                      |  | c     |  |                                         | 5,733,627   |   |                              |  | (1,400   | )                 |  |    | 5,732,227   |  
|Exchange gain, net                                    |  |       |  |                                         | (394,470    | ) |                              |  |          |                   |  |    | (394,470    | )
|                                                      |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|                                                      |  |       |  |                                         | 4,755,396   |   |                              |  | (1,400   | )                 |  |    | 4,753,996   |  
|                                                      |  |       |  |                                        
|Equity interest in net profit of associated companies |  |       |  |                                         | 195,910     |   |                              |  |          |                   |  |    | 195,910     |  
|                                                      |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|Profit before income tax                              |  |       |  |                                         | 23,779,398  |   |                              |  | (278,507 | )                 |  |    | 23,500,891  |  
|Income tax                                            |  | f     |  |                                         | 8,407,940   |   |                              |  | (82,895  | )                 |  |    | 8,325,045   |  
|                                                      |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|Net profit                                            |  |       |  | P.                                      | 15,371,458  |   |                              |  | (195,612 | )                 |  | P. | 15,175,846  |  
|                                                      |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|                                                      |  |       |  |                                        
|Net profit attributable to:                           |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|                                                      |  |       |  |                                        
|Equity holders of the parent                          |  |       |  | P.                                      | 15,384,162  |   |                              |  | (195,609 | )                 |  | P. | 15,188,553  |  
|Non-controlling interest                              |  |       |  |                                         | (12,704     | ) |                              |  | (3       | )                 |  |    | (12,707     | )
|                                                      |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  
|                                                      |  |       |  | P.                                      | 15,371,458  |   |                              |  | (195,612 | )                 |  | P. | 15,175,846  |  
|                                                      |  |       |  |                                         |             |   |                              |  |          |                   |  |    |             |  



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices
|-- | ---------------------------------------------

The principal accounting policies and practices followed by the Company in the preparation of these consolidated financial statements, in conformity with IFRS, are described below:

a) Basis of preparation

The accompanying financial statements have been prepared in conformity with International Financial Reporting Standards as issued by the
International Accounting Standards Board (IASB) (hereafter referred to as IFRS), in force at December 31, 2011, and are the first consolidated financial statements prepared by the Company under IFRS.

The preparation of these financial statements under IFRS requires the use of critical estimates and assumptions that affect the amounts
reported for certain assets and liabilities, as well as certain income and expenses. It also requires that management exercise judgment in the application of the Companys accounting policies.

The Mexican peso is the functional currency and reporting currency of these financial statements.

The consolidated financial statements as of December 31, 2010, which were previously prepared in accordance with the Mexican FRS,
have been modified in accordance with IFRS since the transition date.

b) Consolidation and basis of translation of financial statements of
foreign subsidiaries

i) Consolidation and equity method

The consolidated financial statements include the accounts of Teléfonos de México, S.A.B. de C.V and those of the subsidiaries over which the Company exercises control. All of the companies
operate in the telecommunications field or provide services to companies relating to this activity.

Subsidiaries are fully
consolidated from the acquisition date, which is the date when TELMEX obtains control, and continue to be consolidated until the date when TELMEX no longer has such control. The financial statements of the subsidiaries are prepared for the same
reporting period as TELMEX, using consistent accounting policies.

All intercompany balances and transactions have been
eliminated in the consolidated financial statements.

Non-controlling interest refers to certain subsidiaries in which the
Company does not hold 100% of the shares. Non-controlling interest is presented as a separate caption of equity in the consolidated statements of financial position, and in the consolidated statements of income and statements of comprehensive
income.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



The investments in associated companies in which the Company exercises significant
influence are accounted for using the equity method, whereby TELMEX recognizes its share in the net income and equity of the associates (Note 8).

The results of operations of the subsidiaries and associates were incorporated in the Companys consolidated financial statements as of the month following their acquisition.

TELMEXs equity interest in its principal subsidiaries and associated companies is as follows:



|                                                |         |        |      |                    |     |      |                 |  |     |   |  |  |     |  
|----------------------------------------------- | ------- | ------ | ---- | ------------------ | --- | ---- | --------------- |  | --- | - |  |  | --- | -
|                                                |         |        |      | Equity interest at |    
|Company                                         |         |        |      | December 31        |     |      | January 
1,2010 | 
|                                                | Country |        | 2011 |                    |     | 2010 |                 | 
|Subsidiaries:                                   |         |        |      |                    |     |      |                 |  |     |   |  |  |     |  
|Integración de Servicios TMX, S.A. de C.V.      |         | Mexico |      |                    | 100 | %    |                 |  | 100 | % |  |  | 100 | %
|Alquiladora de Casas, S.A. de C.V.              |         | Mexico |      |                    | 100 | %    |                 |  | 100 | % |  |  | 100 | %
|Cía. de Teléfonos y Bienes Raíces, S.A. de C.V. |         | Mexico |      |                    | 100 | %    |                 |  | 100 | % |  |  | 100 | %
|Consorcio Red Uno, S.A. de C.V.                 |         | Mexico |      |                    | 100 | %    |                 |  | 100 | % |  |  | 100 | %
|Teléfonos del Noroeste, S.A. de C.V.            |         | Mexico |      |                    | 100 | %    |                 |  | 100 | % |  |  | 100 | %
|Uninet, S.A. de C.V.                            |         | Mexico |      |                    | 100 | %    |                 |  | 100 | % |  |  | 100 | %
|Telmex USA, L.L.C.                              |         | U.S.A. |      |                    | 100 | %    |                 |  | 100 | % |  |  | 100 | %
|                                                |         |        |      |                   
|Associated companies:                           |         |        |      |                    |     |      |                 |  |     |   |  |  |     |  
|Grupo Telvista, S.A. de C.V.                    |         | Mexico |      |                    | 45  | %    |                 |  | 45  | % |  |  | 45  | %
|2Wire, Inc.                                     |         | U.S.A. |      |                    |     |      |                 |  |     |   |  |  | 13  | %



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



ii) Basis of translation of financial statements of foreign subsidiaries

The financial statements of foreign subsidiaries are consolidated after they are converted to IFRS in the functional currency, and then
converted to the reporting currency. The assets and liabilities in the financial statements of subsidiaries were translated to Mexican pesos at the prevailing exchange rate at the end of the year, equity accounts were translated at the prevailing
exchange rate at the time capital contributions were made and earnings were generated. Revenues, costs and expenses were translated at the historical exchange rate. Translation differences are recorded in equity in the caption Effect of
translation of foreign entities, under Accumulated other comprehensive income items.

c) Revenue recognition

Revenues are recognized at the time services are rendered. Local service revenues are related to new-line installation
charges, monthly service fees, measured usage charges based on the number of calls made, and other service charges to subscribers. Local service revenues also include measured usage charges for prepayment plans, based on the number of minutes.

Revenues from the sale of prepaid telephone service cards are recognized based on an estimate of the usage of time covered by
the prepaid card. Revenues from the sale of equipment are recorded when the product is delivered to the customer

Revenues
from domestic and international long distance telephone services are determined on the basis of the duration of the calls and the type of service used, which are billed monthly based on the authorized prices. International long distance and
interconnection service revenues also include the revenues earned under agreements with foreign carriers for the use of the Companys facilities in interconnecting international calls. These services are regulated by agreements with these
operators, in which the prices to be paid are defined.

Data revenues include revenues from services related to data
transmission through private and managed networks and revenues from Internet access.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



d) Use of estimates

The preparation of financial statements in conformity with IFRS requires the use of estimates and assumptions in certain areas. Actual results could differ from these estimates. TELMEX based its
assumptions and estimates on parameters available when the consolidated financial statements were prepared. Existing circumstances and assumptions about future developments, however, may change due to market changes or circumstances arising beyond
the control of TELMEX. Such changes are reflected in the estimates and assumptions and the related effect in the financial statements when they occur.

These estimates refere principally to the following:



| |  |  | Estimate for useful lives of property, plant and equipment.
| | - |  | -----------------------------------------------------------



| |  |  | Liability and assets for pension and seniority premium benefits due to employees.
| | - |  | ---------------------------------------------------------------------------------



| |  |  | Allowance for doubtful accounts receivable.
| | - |  | -------------------------------------------



| |  |  | Impairment in the value of long-lived assets, intangibles and goodwill.
| | - |  | -----------------------------------------------------------------------



| |  |  | Fair value of derivative financial instruments.
| | - |  | -----------------------------------------------

e) Financial assets and liabilities

Financial assets and liabilities
within the scope of IAS 39 generally include investments in financial instruments, debt and equity instruments, accounts receivable and other accounts receivable, loans and financing, accounts payable and accrued liabilities and derivative financial
instruments.

Financial assets and liabilities are initially recognized at fair value, plus directly attributable transactions
costs, except for those designated upon initial recognition at fair value through profit or loss.

The subsequent measurement
of financial assets and liabilities depends on how they are classified as either financial assets and liabilities measured at fair value, financial assets and liabilities held to maturity and available for sale, loans and accounts receivable.

The financial assets of TELMEX include cash and cash equivalents, trade accounts receivable and other accounts receivable,
listed and unlisted financial instruments and derivative financial instruments.

Financial liabilities are classified into the
following categories based on the nature of the financial instruments contracted or issued: financial liabilities measured at fair value and financial liabilities measured at their amortized cost.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



The Companys financial liabilities include accounts payable to suppliers, deferred
revenues, other accounts payable, loans and derivative financial instruments. Derivative financial instruments are recognized at fair value and short-and long-term debt, as well as accounts payable, are accounted for as financial liabilities
measured at their amortized cost.

Offsetting of financial instruments

Financial assets and financial liabilities are offset and the net amount is presented in the consolidated statement of financial position
if, and only if (i) there is currently a legally enforceable right to compensate the recognized amounts, and (ii) there is the intention to either settle them on a net basis, or to realize the assets and settle the liabilities
simultaneously.

Financial instruments fair value

At each financial statement reporting date, the fair value of financial instruments traded in active markets is determined based on market prices, or prices quoted by financial intermediaries (purchase
price for asset positions and sales price for liability positions), without any deduction for transaction costs.

For
financial instruments that are not traded in an active market, the fair value is determined using generally accepted valuation techniques. Such techniques may include using recent arms length market transactions, references to the current fair
value of another financial instrument that is substantially similar, a discounted cash flow analysis or other valuation models.

Fair values are determined based on the following hierarchy:



| |  |  | Level 1. Quoted prices (unadjusted) in active markets for identical assets or liabilities;
| | - |  | ------------------------------------------------------------------------------------------



| |  |  | Level 2. Variables other than quoted prices in Level 1 that are observable for the asset or liability, either directly (prices) or indirectly (derived
from prices) and;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Level 3. Variables used for the asset or liability that are not based on any observable market data (non-observable variables).
| | - |  | -------------------------------------------------------------------------------------------------------------------------------

Note 13 provide an analysis of the fair values of the Companys financial instruments.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



f) Cash and cash equivalents

Cash at banks earn interest at floating rates based on daily bank deposit rates. Cash equivalents are represented by short-term deposits
made for varying periods of between one day and three months, depending on the immediate cash requirements of the Company, and earn interest at the respective short-term deposit rates. Such investments are stated at acquisition cost plus accrued
interest, which is similar to their market value.

g) Allowance for doubtful accounts

The allowance for doubtful accounts is determined based on the Companys historical experience, past due balances and economics
trends, as well as the evaluation of accounts receivable in litigation seeking recovery. The allowance for doubtful accounts primarily covers the balances of accounts receivable greater than 90 days old.

The risk of uncollectibilitty from related parties receivables is evaluated annually based on an examination of each related partys
financial situation and the markets in which they operate.

h) Derivative financial instruments and hedging activities.

The Company is exposed to interest rate and foreign currency risks, which are mitigated through a controlled risk management program that
includes the use of derivative financial instruments. The Company uses primarily cross-currency swaps and when necessary foreign currency forwards to offset the short-term risk of exchange rate fluctuations. In order to reduce the risks due to
fluctuations in interest rates, the Company utilizes interest-rate swaps, through which it either pays or receives the difference between the net cash amount resulting from paying or receiving a fixed interest rate, and from receiving or paying a
variable interest rate, on notional amounts denominated in Mexican pesos or U.S. dollars. Most of these derivative financial instruments qualify and have been designated as cash flow hedges.

The Companys policy includes: (i) formal documentation of all hedging relationships between the hedging instruments and the
hedged positions; (ii) the objectives of risk management, and (iii) the strategy for conducting hedging transactions. This process takes into account the relationship between the cash flows of the derivatives with the cash flows of the
corresponding Companys assets and liabilities recognized in the statement of financial position.

The effectiveness of
the Companys derivatives used for hedging purposes is evaluated prior to their designation as hedges, as well as during the hedging period, which is performed at least quarterly based on recognized statistical techniques. Whenever it is
determined that a derivative is not highly effective as a hedge or that the derivative ceases to be a highly effective hedge, the Company ceases to apply hedge accounting for the derivative on a prospective basis. For the years ended
December 31, 2011 and 2010, there were no gains or losses recognized due to changes in the accounting treatment of hedges.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



Derivative financial instruments are recognized in the statement of financial position
at their fair values, which are obtained from the financial institutions with which the Company has entered into the related agreements. The Companys policy is to verify such fair values against valuations provided by an independent valuation
agent contracted by the Company. The effective portion of the cash flow hedges gain or loss is in equity under the caption Accumulated other comprehensive income items, while the ineffective portion is recognized in current year
earnings. Changes in the fair value of derivatives that do not qualify as hedging instruments are recognized immediately in earnings.

The change in fair value recognized in earnings related to derivatives that are accounted for as hedges is presented in the same income statement caption as the gain or loss on valuation of the primary
position.

i) Inventories

Inventories are valued using the average cost method. The balance of inventories presented in the statement of financial position does not exceed their net realizable value.

The net realizable value is the estimated selling price in the ordinary course of business less the estimated costs necessary to make the
sale.

The estimate of the net realizable value of inventories is determined based on their age and turnover.

j) Property, plant and equipment

Property, plant and equipment at the transition date to IFRS are recorded as discussed above. Property, plant and equipment acquired after the transition date are recorded at acquisition cost. Amounts are
recorded net of accumulated depreciation less any impairment losses. The acquisition cost includes, in addition to the purchase price, any costs directly attributable to bringing the asset to the location and condition necessary for it to be capable
of operating in the manner intended by management.

Depreciation is computed using the straight line method, based on the
estimated useful lives of the related assets, beginning the month after they become available for use. Land is not depreciated (Note 6c).

The assets residual values, useful lives and depreciation methods are reviewed at each financial year end and adjusted prospectively, if appropriate.

For the years ended December 31, 2011 and 2010, the Company did not capitalize any financing costs since it did not have significant
qualifying assets with prolonged acquisition periods.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



Inventories for the operation of the telephone plant are valued based on the average
cost method.

The net book value of any component of property, plant and equipment or any other significant item is removed
from the balance sheet at the time of the assets disposition or when no future economic benefits are expected from its use or sale. Any gains or losses on the disposition of property, plant and equipment represent the difference between net
proceeds of the disposition, if any, and the net book value of the item at the time of disposition. These gains or losses are recognized in earnings upon disposition.

The carrying value of property, plant and equipment is reviewed whenever there are indicators of impairment in such assets. Whenever an assets recovery value, which is the greater of the
assets selling price and its value in use (the present value of future cash flows), is less than the assets net carrying value, the difference is recognized as an impairment loss. For the years ended December 31, 2011 and 2010,
there were no indicators of impairment in these long-lived assets.

k) Leases

When the risks and benefits inherent to the ownership of the leased asset remain mostly with the lessor, they are classified as operating
leases and rent expense is charged to results of operations when incurred.

Property and equipment lease agreements are
recognized as capital leases if (i) the ownership of the leased asset is transferred to the lessee upon termination of the lease; (ii) the agreement includes an option to purchase the asset at a price that is expected to be sufficiently
lower than the fair value at the date the option becomes exercisable; (iii) the term of the lease is substantially the same as the remaining useful life of the leased asset; or (iv) the present value of minimum lease payments is
substantially the same as the market value of the leased asset, net of any future benefit or residual value.

l) Licenses and trademarks

TELMEX records licenses at acquisition cost. The amortization period is based on the terms of the licenses, which range
from 5 to 20 years. Trademarks are recorded at their estimated fair value at the date of acquisition, as determined by independent appraisers, and are amortized using the straight-line method over a 16-year period (Note 7).



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



m) Business combinations and goodwill

Business combinations are accounted for using the acquisition method. The cost of an acquisition is measured as the aggregate of the
consideration transferred, measured at fair value at the acquisition date and the amount of any non-controlling interest in the acquiree. For each business combination, the acquirer measures the non-controlling interest in the acquiree either at
fair value or at the proportionate share of the acquirers identifiable net assets. Acquisition-related costs incurred are expensed and included in administrative expenses.

The subsequent acquisition of non-controlling interest is considered a transaction between entities under common control and any
difference between the purchase price and the carrying value of net assets acquired is recognized as an equity transaction.

Goodwill is initially measured as the excess of the acquisition price and the amount recognized for non-controlling interest, as measured
at their fair value, over the net identifiable assets acquired and liabilities assumed.

n) Impairment in the value of long-lived assets

The Company has a policy in place for evaluating the existence of indicators of impairment in the carrying value of
long-lived assets, including goodwill and intangibles. When there are such indicators, or in the case of assets whose nature requires an annual impairment analysis, the recovery value of the asset is estimated, which is the greater of its fair
value, less any disposal costs, and its value in use. Value in use is determined by discounting estimated future cash flows, applying a discount rate after tax that reflect the time value of money and taking into consideration the specific risks
associated with the asset. When the recovery value of an asset is below its net book value, impairment is considered to exist. In this case, the book value of the asset is reduced to the assets recovery value, recognizing the loss in results
of operations for the respective period. Depreciation and/or amortization expense of future periods is adjusted based on the new accounting value determined for the asset over the assets remaining useful life. Impairment is analyzed for each
asset individually, unless the asset does not generate cash inflows that are largely independent of those from other assets or group of assets (cash generating units).

In the estimation of impairment, the Company uses strategic plans, in which for periods longer than a year, projections are used based on such strategic plans applying a constant or decreasing expected
growth rate.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



The premises used to make the financial forecasts were the following:



| |  |  | Current subscribers and expected growth.
| | - |  | ----------------------------------------



| |  |  | Market situation and penetration expectations
| | - |  | ---------------------------------------------



| |  |  | Investments in maintenance of the current assets
| | - |  | ------------------------------------------------



| |  |  | Market consolidation and synergies
| | - |  | ----------------------------------

Weighted average cost of capital (WACC) and market participants

To
determine the discount rate, the Company uses WACC. For the variables used in its estimation, the Company utilized public information at the date closest to the financial statement reporting date.

The estimated discount rate used for the impairment tests conducted pursuant to IAS 36, considers the evaluation of market participant
assumptions, considering their similarity to the Companys businesses.

o) Accrued liabilities

Accrued liabilities are recognized whenever (i) the Company has current obligations (legal or constructive) resulting from a past
event, (ii) when it is probable the obligation will give rise to a future outflow of economic resources for its settlement and (iii) the amount of the obligation can be reliably estimated.

When the effect of the time value of money is significant, the amount of the liability is determined as the present value of the expected
disbursements to settle the obligation. The discount rate applied is determined on a pre-tax basis and reflects current market conditions at the statement of financial position date and, where appropriate, the risks specific to the liability. When
discounting is used, an increase in the liability is recognized as an interest expense.

Contingent liabilities are recognized
only when it is probable they will give rise to a future outflow of economic resources for their settlement. Also, commitments are only recognized when they will generate a loss.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



p) Employee benefits

The cost of pension benefits and seniority premiums are recognized periodically during the years of service of personnel, based on actuarial computations made by independent actuaries using the projected
unit-credit method (Note 12).

Actuarial (losses) gains are being amortized over a period of 11 years, which is the estimated
average remaining working lifetime of Company employees.

q) Exchange differences

Transactions in foreign currency are recorded at the prevailing exchange rate on the day of the related transactions. Foreign currency
denominated monetary assets and liabilities are valued at the prevailing exchange rate at the statement of financial position date. Exchange differences from the transaction date to the time foreign currency denominated monetary assets and
liabilities are settled, as well as those arising from the translation of foreign currency denominated balances at the statement of financial position date, are charged or credited to results of operations.

r) Taxes on profits

Current and deferred income taxes are recorded as an income or expense in the statement of income, except to the extent that the tax
arises from a transaction or event which is recognized, in the same or a different period,outside profit or loss, either in other comprehensive income or in equity.

Current income tax

Current income tax assets and liabilities for the
current period are measured at the amount expected to be recovered from or paid to the tax authorities. The tax rates and tax laws used to compute the amount are those that are enacted or substantively enacted, at the reporting date.

Deferred income tax

Deferred income taxes are recognized using the asset and liability method. Under this method, deferred income taxes are recognized on all
differences between the financial reporting and tax values of assets and liabilities, applying the enacted income tax rate effective as of the statement of financial position date, or the enacted rates at that date that will be in effect when the
deferred tax assets and liabilities are expected to be recovered or settled.

The Company periodically evaluates the
possibility of recovering deferred tax assets and, if necessary, creates a valuation allowance for those assets that do not have a high probability of being realized.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



s) Statement of income presentation

Costs and expenses shown in the Companys statement of income are presented based on a combination of their nature and function, in
accordance with industry practice since such classification allows for an appropriate evaluation of operating profit.

The
Operating profit caption is shown in the statement of income since it is an important indicator used for evaluating the Companys operating results.

The Other expenses, net caption includes employee profit sharing for the current period of P.1,693,372 (P.1,998,105 in 2010).

t) Statement of cash flows

The statement of cash flows shows the
entitys cash inflows and outflows during the period. Also, the statement of cash flows begins with profit before income tax, followed by cash flows from operating activities, then cash flows from investing activities and finally cash flows
from financing activities.

The statement of cash flows for the years ended December 31, 2011 and 2010 were prepared
using the indirect method.

u) Earnings per share

Earnings per share are determined by dividing net income attributable to equity holders of the parent by the weighted-average number of shares outstanding during the year. In determining the
weighted-average number of shares outstanding during the year, shares acquired by the Company have been excluded.

v) Concentration of risk

The main financial instruments used by the Company for financing purposes are bonds, domestic senior notes, bank loans,
derivative financial instruments and accounts payable. The Company holds several financial assets, such as cash and cash equivalents, accounts receivable and prepaid expenses that come directly from its operations.

The main risks associated with the Companys financial instruments are cash flow risk, liquidity risk, market risk and credit risk.
The Company uses sensitivity analyses to measure the potential losses based on a theoretical increase of 100 basis points in interest rates and a 10% fluctuation in the relevant exchange rates. The Board of Directors approves the policies submitted
by management to manage these risks.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



Credit risk represents the potential loss from the failure of counterparties to
completely comply with their contractual obligations. The Company is also exposed to market risks related to fluctuations in interest rates and exchange rates. In order to reduce the risks related to fluctuations in interest rates and exchange
rates, the Company uses derivative financial instruments as hedges against its debt obligations.

Financial instruments which
potentially subject the Company to concentrations of credit risk are cash and cash equivalents; trade accounts receivable, debt and derivative financial instruments. Pension fund assets are subject to market risk. The Companys policy is
designed to not restrict its exposure to any one financial institution; therefore, the Companys financial instruments are maintained in different financial institutions.

The credit risk in accounts receivable is diversified because the Company has a broad customer base. The Company continuously evaluates the credit conditions of its customers and does not require
collateral to guarantee collection of its accounts receivable. In the event the collection of accounts receivable deteriorates significantly, the Companys results of operations could be adversely affected.

A portion of the Companys cash surplus is invested in term deposits with financial institutions with high credit scores.

Sensitivity analysis

Exchange rates

The potential
loss in the Companys financial instruments at December 31, 2011 that would have resulted from a hypothetical, instantaneous and unfavorable 10% change in currency exchange rates, in which the foreign currency debt is denominated, would
have been P.675,204. Such a change in currency exchange rates would also have resulted in additional interest expense of P. 17,274 per year. The sensitivity analysis assumes an unfavorable change in the exchange rate, a fair value estimate
of financial instruments and no change in the principal amount of such indebtedness. The sensitivity analysis includes the derivative financial instruments contracted as of December 31, 2011.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



Interest rates

The potential loss in the Companys financial instruments at December 31, 2011 that would have resulted from a hypothetical, instantaneous and unfavorable change of 100 basis points in the
interest rate applicable to such financial instruments would have been P.1,427,380. This effect would be fully attributable to the impact of the interest rate change on fixed-rate financial assets and liabilities. Additionally, it would
have resulted in additional interest expense of P.381,411 per year. The sensitivity analysis assumes an unfavorable change in the interest rates applicable to each homogeneous category of financial assets and liabilities, a fair value estimate
of financial instruments and no change in the principal amount of such indebtedness. The sensitivity analysis includes the derivative financial instruments contracted as of December 31, 2011. A homogeneous category is defined according to the
currency in which financial assets and liabilities are denominated and assumes the same interest rate movement with each homogeneous category. As a result, this interest rate risk sensitivity analysis may overstate the impact of interest rate
fluctuations for such financial instruments, as consistently unfavorable.

w) Segments

Segment information is presented based on information used by the Company in its decision-making processes (Note 18).

Local and long distance segment information differs from the information presented in the consolidated financial statements due to:



| |  |  | Segment information only includes those companies that are directly involved in rendering local and long distance telephone services in Mexico.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Local service includes: revenues from basic rent, measured service, installation charges, equipment sales and interconnection.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------



| |  |  | Long distance service includes: revenues from basic services of domestic and international long distance services; it does not include revenues from
rural and public telephony and data services.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | The services being disclosed include the corresponding attributes for interconnection, billing, collections, and co-location and leased lines.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Interconnection with cellular operators includes revenues from calling party pays service.
| | - |  | ------------------------------------------------------------------------------------------



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



x) New accounting pronouncements

The IFRS improvements and modifications as well as the interpretations that have been published in 2011 are as follows. At the financial
statements date, these standards have not become effective, and the Company has not early adopted them.



|        |  |                                                       |  |                           |                 | 
|------- |  | ----------------------------------------------------- |  | ------------------------- | --------------- | 
|        |  | New Standards                                         |  | Mandatoryapplication Date |                
|IFRS 9  |  | Financial Instruments: Classification and Measurement |  |                           | January 1, 2015 | 
|IFRS 10 |  | Consolidated Financial Statements                     |  |                           | January 1, 2013 | 
|IFRS 11 |  | Joint Arrangements                                    |  |                           | January 1, 2013 | 
|IFRS 12 |  | Disclosure of Interests in Other Entities             |  |                           | January 1, 2013 | 
|IFRS 13 |  | Fair Value Measurement                                |  |                           | January 1, 2013 | 

IFRS 9 Financial Instruments

The standard introduces new requirements for the classification and measurement of financial assets, permitting early adoption. It requires that all the financial assets be classified on the basis of the
business model for the financial assets management and the characteristics of the contractual cash flows of the financial assets. Under this standard, the financial assets are measured either at amortized cost or fair value. Only the financial
assets classified as measured at amortized cost should be tested for impairment. Its application is effective beginning January 1, 2015, with early adoption allowed.

IFRS 10 Consolidated Financial Statements

This statement
replaces the section of IAS 27 Consolidated and separate financial statements which refers to accounting for consolidated financial statements. It also includes matters included in SIC 12 Consolidation-Special purpose
entities. IFRS 10 establishes a sole model of control that applies to all entities (including special purpose entities or structured entities). The changes in IFRS 10 will require the Companys management apply professional judgment when
determining which entity is controlled and must be consolidated, as compared to the requirements of IAS 27.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (continued)
|-- | ---------------------------------------------------------



IFRS 11 Joint Arrangements

IAS 31 Interests in Joint Ventures and SIC 13 Jointly Controlled Entities  Non-Monetary Contributions by
Venturers are replaced by IFRS 11 Joint Arrangements. IFRS 11 used some of the terminology that was used in IAS 31, but with different meanings. While IAS 31 identifies three forms of joint ventures, IFRS 11 has only two forms of
joint arrangements (joint venture and joint operation) when joint control exits. Because IFRS 11 uses the control principle in IFRS 10 to identify control, the determination if there is joint control may change. Also IFRS 11 removes the option to
account for jointly-controlled entities using proportionate consolidation. Instead, those jointly-controlled entities must be accounted for using the equity method. For joint operations, those including jointly-controlled assets, start-up joint
operations and start-up jointly-controlled entities, an entity must recognize its share of assets, liabilities, revenues and expenses in accordance with the applicable IFRS.

IFRS 12 Disclosure of Interests in Other Entities

IFRS 12
includes all the disclosures that were in IAS 27 related to consolidation, as well as the disclosures previously included in IAS 31 and IAS 28. These disclosures refer to the participation in related entities, joint arrangements, associated
companies and structured entities. New disclosures are also required.

IFRS 13 Fair Value Measurement

IFRS 13 establishes a sole-source guide about fair value measurement, when such is required or allowed by IFRS. It does not change when an
entity must use fair value. The standard changes the fair value definition to the price that could be received when an asset is sold, or the price that could be paid to settle a liability, in a normal transaction between market participants at the
valuation date (exit price). In addition, IFRS 13 requires new disclosures.

The Company is still evaluating the impact that
the aforementioned IFRS may have on the consolidated financial statements.

Improvement and modifications to existing IFRS are
as follows:



|       |  |                                      |  |                           |                 | 
|------ |  | ------------------------------------ |  | ------------------------- | --------------- | 
|       |  | Improvements and modifications       |  | Mandatoryapplication date |                
|IAS 1  |  | Presentation of Financial Statements |  |                           | July 1, 2012    | 
|IAS 19 |  | Employee Benefits                    |  |                           | January 1, 2013 | 



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|3. | Significant Accounting Policies and Practices (concluded)
|-- | ---------------------------------------------------------



IAS 1 Presentation of Financial Statements

The IAS 1 modifications are related to the presentation of other comprehensive income, giving the option to present the
statement of income and the statement of comprehensive income in a sole financial statement or as separate financial statements. It also changes paragraphs related with information that has to be presented in the statement of income and in other
comprehensive income. These changes implicate modifications in other standards that are affected by this improvement. These changes are mandatory beginning on July 1, 2012. Early adoption is allowed, in which case, such must be disclosed.

IAS 19 Employee Benefits

On June 16, 2011, the IASB published modifications to IAS 19, Employee Benefits, which changes the accounting for defined benefit plans and termination benefits. The modifications require
the recognition of the changes in the defined benefit obligation and plan assets when they occur, eliminating the corridor approach and accelerating the recognition of past service costs. Changes in the defined benefit obligation and plan assets are
divided in three components: service cost, net interest of net (assets) liabilities of defined benefits and remeasurements of the net (assets) liabilities for defined benefits. The net interest is calculated using a rate of return for high quality
corporate bonds, which may be less than the current rate used to calculate the expected return on the plan assets, resulting in a decrease to the profit for the current period. The modifications are effective beginning January 1, 2013, with
early adoption allowed. Also retrospective application is required with certain exceptions.

The Company is still evaluating
the impact that the aforementioned IFRS may have on the consolidated financial statements. However, the Company expects the amended guidance, upon adoption, to result in the recognition of unamortized actuarial losses, described in Note 12, in
Accumulated other comprehensive income items in equity.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|4. | Cash and Cash Equivalents
|-- | -------------------------

An analysis of cash and cash equivalents at December 31, 2011 and 2010 and at January 1, 2010 is as follows:



|                       |  |              |           |  |            |    |           |      |  |    |            | 
|---------------------- |  | ------------ | --------- |  | ---------- | -- | --------- | ---- |  | -- | ---------- | 
|                       |  | December 31, |           |  | January 1, |   
|                       |  | 2011         |           |  | 2010       |    |           | 2010 | 
|Cash and bank accounts |  | P.           | 1,018,210 |  |            | P. | 817,630   |      |  | P. | 1,010,973  | 
|Cash equivalents       |  |              | 776,794   |  |            |    | 6,675,835 |      |  |    | 13,368,795 | 
|                       |  |              |           |  |            |    |           |      |  |    |            | 
|Total                  |  | P.           | 1,795,004 |  |            | P. | 7,493,465 |      |  | P. | 14,379,768 | 
|                       |  |              |           |  |            |    |           |      |  |    |            | 



|5. | Accounts Receivable
|-- | -------------------

a)
An analysis of accounts receivable at December 31, 2011 and 2010 and at January 1, 2010 is as follows:



|                                |  |              |            |  |            |    |            |      |  |    |            | 
|------------------------------- |  | ------------ | ---------- |  | ---------- | -- | ---------- | ---- |  | -- | ---------- | 
|                                |  | December 31, |            |  | January 1, |   
|                                |  | 2011         |            |  | 2010       |    |            | 2010 | 
|Customers                       |  | P.           | 21,712,314 |  |            | P. | 19,947,405 |      |  | P. | 19,798,942 | 
|Recoverable taxes               |  |              | 3,727,276  |  |            |    | 623,876    |      |  |    | 2,728,510  | 
|Related parties (Note 15)       |  |              | 684,405    |  |            |    | 892,786    |      |  |    | 894,535    | 
|Net settlement receivables      |  |              | 207,116    |  |            |    | 181,856    |      |  |    | 417,152    | 
|Other                           |  |              | 1,204,706  |  |            |    | 1,037,916  |      |  |    | 895,298    | 
|                                |  |              |            |  |            |    |            |      |  |    |            | 
|                                |  |              | 27,535,817 |  |            |    | 22,683,839 |      |  |    | 24,734,437 | 
|Less:                           |  |              |            |  |            |    |            |      |  |    |            | 
|Allowance for doubtful accounts |  |              | 5,507,753  |  |            |    | 5,565,480  |      |  |    | 4,308,881  | 
|                                |  |              |            |  |            |    |            |      |  |    |            | 
|Total                           |  | P.           | 22,028,064 |  |            | P. | 17,118,359 |      |  | P. | 20,425,556 | 
|                                |  |              |            |  |            |    |            |      |  |    |            | 

b) For the years ended December 31, 2011 and 2010, the changes in the allowance for doubtful
accounts is as follows:



|                               |  |              |            |   |      |    |            |  
|------------------------------ |  | ------------ | ---------- | - | ---- | -- | ---------- | -
|                               |  | December 31, |           
|                               |  | 2011         |            |   | 2010 |   
|Beginning balance at January 1 |  | P.           | 5,565,480  |   |      | P. | 4,308,881  |  
|Increase charged to expenses   |  |              | 1,887,839  |   |      |    | 2,748,738  |  
|Write-offs                     |  |              | (1,945,566 | ) |      |    | (1,492,139 | )
|                               |  |              |            |   |      |    |            |  
|Ending balance at December 31  |  | P.           | 5,507,753  |   |      | P. | 5,565,480  |  
|                               |  |              |            |   |      |    |            |  



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|5. | Accounts Receivable (concluded)
|-- | -------------------------------



c) The following table shows a breakdown of accounts receivable based on their age at
December 31, 2011 and 2010 and at January 1, 2010:



|                              |  |              |            |  |            |    |            |      |  |    |            | 
|----------------------------- |  | ------------ | ---------- |  | ---------- | -- | ---------- | ---- |  | -- | ---------- | 
|                              |  | December 31, |            |  | January 1, |   
|                              |  | 2011         |            |  | 2010       |    |            | 2010 | 
|Neither past due nor impaired |  | P.           | 12,976,621 |  |            | P. | 11,822,530 |      |  | P. | 12,368,374 | 
|Past due:                     |  |              |            |  |            |    |            |      |  |    |            | 
|1 to 30 days                  |  |              | 1,641,984  |  |            |    | 1,456,275  |      |  |    | 1,542,194  | 
|31 to 60 days                 |  |              | 664,542    |  |            |    | 695,282    |      |  |    | 744,035    | 
|61 to 90 days                 |  |              | 572,951    |  |            |    | 589,176    |      |  |    | 714,274    | 
|More than 90 days             |  |              | 5,856,216  |  |            |    | 5,384,142  |      |  |    | 4,430,065  | 
|                              |  |              |            |  |            |    |            |      |  |    |            | 
|Total                         |  | P.           | 21,712,314 |  |            | P. | 19,947,405 |      |  | P. | 19,798,942 | 
|                              |  |              |            |  |            |    |            |      |  |    |            | 



|6. | Property, Plant and Equipment
|-- | -----------------------------

a) An analysis of property, plant and equipment is as follows:



|                                                             |  |              |             |  |            |    |             |      |  |    |             | 
|------------------------------------------------------------ |  | ------------ | ----------- |  | ---------- | -- | ----------- | ---- |  | -- | ----------- | 
|                                                             |  | December 31, |             |  | January 1, |   
|                                                             |  | 2011         |             |  | 2010       |    |             | 2010 | 
|Telephone plant and equipment                                |  | P.           | 90,486,725  |  |            | P. | 80,517,734  |      |  | P. | 74,678,526  | 
|Land and buildings                                           |  |              | 19,360,900  |  |            |    | 19,256,651  |      |  |    | 18,897,589  | 
|Computer equipment and other assets                          |  |              | 17,393,028  |  |            |    | 14,477,001  |      |  |    | 10,319,560  | 
|                                                             |  |              |             |  |            |    |             |      |  |    |             | 
|                                                             |  |              | 127,240,653 |  |            |    | 114,251,386 |      |  |    | 103,895,675 | 
|Less:                                                        |  |              |             |  |            |    |             |      |  |    |             | 
|Accumulated depreciation                                     |  |              | 33,536,677  |  |            |    | 17,066,858  |      |  |    |             | 
|                                                             |  |              |             |  |            |    |             |      |  |    |             | 
|Net                                                          |  |              | 93,703,976  |  |            |    | 97,184,528  |      |  |    | 103,895,675 | 
|Construction in progress and advances to equipment suppliers |  |              | 782,175     |  |            |    | 244,469     |      |  |    | 409,074     | 
|Inventories for operation of the telephone plant             |  |              | 3,962,469   |  |            |    | 1,992,335   |      |  |    | 1,742,893   | 
|                                                             |  |              |             |  |            |    |             |      |  |    |             | 
|Total                                                        |  | P.           | 98,448,620  |  |            | P. | 99,421,332  |      |  | P. | 106,047,642 | 
|                                                             |  |              |             |  |            |    |             |      |  |    |             | 



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|6. | Property, Plant and Equipment (concluded)
|-- | -----------------------------------------



b) An analysis of the changes in property, plant and equipment is as follows:



|                          |  |                             |            |   |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    |             |  
|------------------------- |  | --------------------------- | ---------- | - | ----------------- | -- | ---------- | -------------------------------- |  | -- | -------------------------------------------------------- | - |  | --------------------------------------------- | ---------- | - | ----- | -- | ---------- | - |  | -- | ----------- | -
|Changes                   |  | Telephoneplant
andequipment |            |   | Land andbuildings |    |            | Computerequipmentand otherassets |  |    | Construction inprogress andadvances toequipmentsuppliers |   |  | Inventories foroperation ofthe telephoneplant |            |   | Total |   
|Cost:                     |  |                             |            |   |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    |             |  
|January 1, 2010           |  | P.                          | 74,678,526 |   |                   | P. | 18,897,589 |                                  |  | P. | 10,319,560                                               |   |  | P.                                            | 409,074    |   |       | P. | 1,742,893  |   |  | P. | 106,047,642 |  
|Additions                 |  |                             | 6,269,925  |   |                   |    | 379,800    |                                  |  |    | 4,199,788                                                |   |  |                                               | 4,094,146  |   |       |    | 4,200,493  |   |  |    | 19,144,152  |  
|Retirements and transfers |  |                             | (416,478   | ) |                   |    | (20,738    | )                                |  |    | (39,613                                                  | ) |  |                                               | (4,258,751 | ) |       |    | (3,951,051 | ) |  |    | (8,686,631  | )
|Effect of translation     |  |                             | (14,239    | ) |                   |    |            |                                  |  |    | (2,734                                                   | ) |  |                                               |            |   |       |    |            |   |  |    | (16,973     | )
|                          |  |                             |            |   |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    |             |  
|December 31, 2010         |  |                             | 80,517,734 |   |                   |    | 19,256,651 |                                  |  |    | 14,477,001                                               |   |  |                                               | 244,469    |   |       |    | 1,992,335  |   |  |    | 116,488,190 |  
|Additions                 |  |                             | 10,888,721 |   |                   |    | 118,708    |                                  |  |    | 3,350,580                                                |   |  |                                               | 7,443,116  |   |       |    | 7,307,836  |   |  |    | 29,108,961  |  
|Retirements and transfers |  |                             | (1,008,578 | ) |                   |    | (14,594    | )                                |  |    | (436,529                                                 | ) |  |                                               | (6,905,410 | ) |       |    | (5,337,702 | ) |  |    | (13,702,813 | )
|Effect of translation     |  |                             | 88,848     |   |                   |    | 135        |                                  |  |    | 1,976                                                    |   |  |                                               |            |   |       |    |            |   |  |    | 90,959      |  
|                          |  |                             |            |   |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    |             |  
|December 31, 2011         |  | P.                          | 90,486,725 |   |                   | P. | 19,360,900 |                                  |  | P. | 17,393,028                                               |   |  | P.                                            | 782,175    |   |       | P. | 3,962,469  |   |  | P. | 131,985,297 |  
|                          |  |                             |            |   |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    |             |  
|Depreciation:             |  |                             |            |   |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    |             |  
|January 1, 2010           |  |                             |            |   |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    |             |  
|Depreciation for the year |  | P.                          | 13,481,385 |   |                   | P. | 852,883    |                                  |  | P. | 3,058,143                                                |   |  |                                               |            |   |       |    |            |   |  | P. | 17,392,411  |  
|Retirements               |  |                             | (303,732   | ) |                   |    | (2,544     | )                                |  |    | (14,411                                                  | ) |  |                                               |            |   |       |    |            |   |  |    | (320,687    | )
|Effect of translation     |  |                             | (4,866     | ) |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    | (4,866      | )
|                          |  |                             |            |   |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    |             |  
|December 31, 2010         |  |                             | 13,172,787 |   |                   |    | 850,339    |                                  |  |    | 3,043,732                                                |   |  |                                               |            |   |       |    |            |   |  |    | 17,066,858  |  
|Depreciation for the year |  |                             | 13,211,655 |   |                   |    | 813,979    |                                  |  |    | 2,791,987                                                |   |  |                                               |            |   |       |    |            |   |  |    | 16,817,621  |  
|Retirements               |  |                             | (6,288     | ) |                   |    | (5         | )                                |  |    | (412,312                                                 | ) |  |                                               |            |   |       |    |            |   |  |    | (418,605    | )
|Effect of translation     |  |                             | 69,935     |   |                   |    | 6          |                                  |  |    | 862                                                      |   |  |                                               |            |   |       |    |            |   |  |    | 70,803      |  
|                          |  |                             |            |   |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    |             |  
|December 31, 2011         |  | P.                          | 26,448,089 |   |                   | P. | 1,664,319  |                                  |  | P. | 5,424,269                                                |   |  |                                               |            |   |       |    |            |   |  | P. | 33,536,677  |  
|                          |  |                             |            |   |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    |             |  
|Book value:               |  |                             |            |   |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    |             |  
|At December 31, 2011      |  | P.                          | 64,038,636 |   |                   | P. | 17,696,581 |                                  |  | P. | 11,968,759                                               |   |  | P.                                            | 782,175    |   |       | P. | 3,962,469  |   |  | P. | 98,448,620  |  
|                          |  |                             |            |   |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    |             |  
|At December 31, 2010      |  | P.                          | 67,344,947 |   |                   | P. | 18,406,312 |                                  |  | P. | 11,433,269                                               |   |  | P.                                            | 244,469    |   |       | P. | 1,992,335  |   |  | P. | 99,421,332  |  
|                          |  |                             |            |   |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    |             |  
|At January 1, 2010        |  | P.                          | 74,678,526 |   |                   | P. | 18,897,589 |                                  |  | P. | 10,319,560                                               |   |  | P.                                            | 409,074    |   |       | P. | 1,742,893  |   |  | P. | 106,047,642 |  
|                          |  |                             |            |   |                   |    |            |                                  |  |    |                                                          |   |  |                                               |            |   |       |    |            |   |  |    |             |  

Construction in progress refers mainly to projects related to telephone plant, which are scheduled to be
completed and transferred to the plant during the first half of 2012.

c) Depreciation of the telephone plant and equipment is
calculated at annual rates ranging from 3.3% to 20.0%. The rest of the Companys assets, excluding land, are depreciated at rates ranging from 10% to 33.3%. Depreciation charged to operating costs and expenses was P.16,817,621 in 2011 and
P.17,392,411 in 2010.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|7. | Licenses and Trademarks
|-- | -----------------------

An analysis of licenses and trademarks at December 31, 2011, and 2010 and at January 1, 2010 is as follows:



|                |  |              |           |  |            |    |           |      |  |    |         | 
|--------------- |  | ------------ | --------- |  | ---------- | -- | --------- | ---- |  | -- | ------- | 
|                |  | December 31, |           |  | January 1, |   
|                |  | 2011         |           |  | 2010       |    |           | 2010 | 
|Licenses, net   |  | P.           | 619,935   |  |            | P. | 693,535   |      |  | P. | 739,403 | 
|Trademarks, net |  |              | 428,246   |  |            |    | 456,708   |      |  |    |         | 
|                |  |              |           |  |            |    |           |      |  |    |         | 
|Total           |  | P.           | 1,048,181 |  |            | P. | 1,150,243 |      |  | P. | 739,403 | 
|                |  |              |           |  |            |    |           |      |  |    |         | 

Licenses

An analysis of licenses cost and their amortization at December 31, 2011 and 2010 and January 1, 2010 is as follows:



|                          |  |              |           |  |            |    |           |      |  |    |           | 
|------------------------- |  | ------------ | --------- |  | ---------- | -- | --------- | ---- |  | -- | --------- | 
|                          |  | December 31, |           |  | January 1, |   
|                          |  | 2011         |           |  | 2010       |    |           | 2010 | 
|Cost                      |  | P.           | 1,405,424 |  |            | P. | 1,389,441 |      |  | P. | 1,342,115 | 
|Accumulated amortization, |  |              | 785,489   |  |            |    | 695,906   |      |  |    | 602,712   | 
|                          |  |              |           |  |            |    |           |      |  |    |           | 
|Net                       |  | P.           | 619,935   |  |            | P. | 693,535   |      |  | P. | 739,403   | 
|                          |  |              |           |  |            |    |           |      |  |    |           | 

An analysis of the changes in 2011 and 2010 is as follows:



|                         |  |                          |           |  |                                  |    |         |                            |  |    |           | 
|------------------------ |  | ------------------------ | --------- |  | -------------------------------- | -- | ------- | -------------------------- |  | -- | --------- | 
|                         |  | Balance
atJanuary 1,2011 |           |  | Cost andamortizationfor the year |    |         | Balance atDecember 31,2011 | 
|Cost                     |  | P.                       | 1,389,441 |  |                                  | P. | 15,983  |                            |  | P. | 1,405,424 | 
|Accumulated amortization |  |                          | 695,906   |  |                                  |    | 89,583  |                            |  |    | 785,489   | 
|                         |  |                          |           |  |                                  |    |         |                            |  |    |           | 
|Net                      |  | P.                       | 693,535   |  |                                  | P. | (73,600 | )                          |  | P. | 619,935   | 
|                         |  |                          |           |  |                                  |    |         |                            |  |    |           | 



|                         |  |                           |           |  |                   |    |        |                             |  |    |                                  |  |  |                            |         |   |  |    |           | 
|------------------------ |  | ------------------------- | --------- |  | ----------------- | -- | ------ | --------------------------- |  | -- | -------------------------------- |  |  | -------------------------- | ------- | - |  | -- | --------- | 
|                         |  | Balance atJanuary 
1,2010 |           |  | Translationeffect |    |        | Effectof 
acquiredcompanies |  |    | Cost andamortizationfor the year |  |  | Balance atDecember 31,2010 |        
|Cost                     |  | P.                        | 1,342,115 |  |                   | P. | 19,281 |                             |  | P. | 21,425                           |  |  | P.                         | 6,620   |   |  | P. | 1,389,441 | 
|Accumulated amortization |  |                           | 602,712   |  |                   |    | 2,447  |                             |  |    |                                  |  |  |                            | 90,747  |   |  |    | 695,906   | 
|                         |  |                           |           |  |                   |    |        |                             |  |    |                                  |  |  |                            |         |   |  |    |           | 
|Net                      |  | P.                        | 739,403   |  |                   | P. | 16,834 |                             |  | P. | 21,425                           |  |  | P.                         | (84,127 | ) |  | P. | 693,535   | 
|                         |  |                           |           |  |                   |    |        |                             |  |    |                                  |  |  |                            |         |   |  |    |           | 



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|7. | Licenses and Trademarks (concluded)
|-- | -----------------------------------



Trademarks

At December 31, 2011 and 2010, the Company has trademarks of certain acquired companies in 2010, which were recognized at their fair value, based on appraisals performed by independent experts.

An analysis of trademarks and their amortization at December 31, 2011 and 2010 is as follows:



|                         |  |              |         |  |      |    |         | 
|------------------------ |  | ------------ | ------- |  | ---- | -- | ------- | 
|                         |  | December 31, |        
|                         |  | 2011         |         |  | 2010 |   
|Cost                     |  | P.           | 473,310 |  |      | P. | 473,310 | 
|Accumulated amortization |  |              | 45,064  |  |      |    | 16,602  | 
|                         |  |              |         |  |      |    |         | 
|Net                      |  | P.           | 428,246 |  |      | P. | 456,708 | 
|                         |  |              |         |  |      |    |         | 

An analysis of changes in trademarks at 2011 is as follows:



|                         |  |                          |         |  |                                  |    |         |                            |  |    |         | 
|------------------------ |  | ------------------------ | ------- |  | -------------------------------- | -- | ------- | -------------------------- |  | -- | ------- | 
|                         |  | Balance
atJanuary 1,2011 |         |  | Cost andamortizationfor the year |    |         | Balance
atDecember 31,2011 | 
|Cost                     |  | P.                       | 473,310 |  |                                  | P. |         |                            |  | P. | 473,310 | 
|Accumulated amortization |  |                          | 16,602  |  |                                  |    | 28,462  |                            |  |    | 45,064  | 
|                         |  |                          |         |  |                                  |    |         |                            |  |    |         | 
|Net                      |  | P.                       | 456,708 |  |                                  | P. | (28,462 | )                          |  | P. | 428,246 | 
|                         |  |                          |         |  |                                  |    |         |                            |  |    |         | 

The amortization expense of other deferred charges was P.724 and P.611 for the years ended
December 31, 2011 and 2010, respectively.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|8. | Investments
|-- | -----------

Equity investments

An analysis of equity investments in associated companies and a brief description of each are as follows:



|                             |  |              |           |  |            |    |           |      |  |    |           | 
|---------------------------- |  | ------------ | --------- |  | ---------- | -- | --------- | ---- |  | -- | --------- | 
|                             |  | December 31, |           |  | January 1, |   
|                             |  | 2011         |           |  | 2010       |    |           | 2010 | 
|Equity investments in:       |  |              |           |  |            |    |           |      |  |    |           | 
|Grupo Telvista, S.A. de C.V. |  | P.           | 897,770   |  |            | P. | 784,875   |      |  | P. | 907,973   | 
|2Wire, Inc.                  |  |              |           |  |            |    |           |      |  |    | 270,228   | 
|Other associated companies   |  |              | 687,560   |  |            |    | 604,544   |      |  |    | 563,749   | 
|                             |  |              |           |  |            |    |           |      |  |    |           | 
|                             |  | P.           | 1,585,330 |  |            | P. | 1,389,419 |      |  | P. | 1,741,950 | 
|                             |  |              |           |  |            |    |           |      |  |    |           | 

Grupo Telvista

TELMEX holds 45% of the capital stock of Grupo Telvista, S.A. de C.V. (Grupo Telvista) which, through its subsidiaries, provides telemarketing services in Mexico and the U.S.A. For the year ended
December 31, 2011, TELMEXs equity interest in the net profit of Grupo Telvista gave rise to a credit to results of operations of P.63,313 (credit of P.24,022 in 2010) ) and a credit to equity of P.49,582 (charge of P.21,120 in 2010). In
September 2010, TELMEX received a dividend of P.126,000.

2Wire

On October 20, 2010, TELMEX sold to Pace, Plc its 13% equity interest in 2Wire, Inc. (2Wire) for P.744,231. Such sale gave rise
to a gain of P.353,306. For the year ended December 31, 2010, TELMEXs equity interest in the net profit of 2Wire gave rise to a credit to results of operations of P.120,697.

Other associated companies

For the year ended December 31, 2011,
TELMEXs equity interest in other associated companies represented a net credit to results of operations of P.51,758 (net credits of P.51,191 in 2010) and a credit to equity of P.35,249 (charge of P.10,396 in 2010). In 2011, TELMEX received
dividends for P.3,991 from other associated companies.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|9. | Debt
|-- | ----

Short-term and
long-term debts consist of the following:



|                                                           |  |                                  |     |   |                |  |     |                         |  |  |                      |   |  |      |      |  |      |    |            |      |  |    |            |  |  |    |             | 
|---------------------------------------------------------- |  | -------------------------------- | --- | - | -------------- |  | --- | ----------------------- |  |  | -------------------- | - |  | ---- | ---- |  | ---- | -- | ---------- | ---- |  | -- | ---------- |  |  | -- | ----------- | 
|                                                           |  | Weighted averageinterest rate at |     |   | Maturitiesfrom |  |     | Balance at December 31, |  |  | Balance atJanuary 1, |  
|                                                           |  | 31/12/11                         |     |   | 31/12/10       |  |     | 01/01/10                |  |  | 2012 through         |   |  | 2011 |      |  | 2010 |    |            | 2010 | 
|Debt denominated in foreign currency:                      |  |                                  |     |   |                |  |     |                         |  |  |                      |   |  |      |      |  |      |    |            |      |  |    |            |  |  |    |             | 
|Senior notes                                               |  |                                  | 5.5 | % |                |  | 5.5 | %                       |  |  | 5.2                  | % |  |      | 2019 |  |      | P. | 13,031,014 |      |  | P. | 16,044,459 |  |  | P. | 29,361,181  | 
|Bank loans                                                 |  |                                  | 0.9 | % |                |  | 0.8 | %                       |  |  | 0.7                  | % |  |      | 2018 |  |      |    | 22,759,931 |      |  |    | 21,665,623 |  |  |    | 40,074,814  | 
|América Móvil                                              |  |                                  |     |   |                |  | 0.6 | %                       |  |  |                      |   |  |      |      |  |      |    |            |      |  |    | 6,178,550  |  |  |    |             | 
|Others                                                     |  |                                  | 2.0 | % |                |  | 2.0 | %                       |  |  | 2.0                  | % |  |      | 2022 |  |      |    | 177,115    |      |  |    | 186,313    |  |  |    | 238,353     | 
|                                                           |  |                                  |     |   |                |  |     |                         |  |  |                      |   |  |      |      |  |      |    |            |      |  |    |            |  |  |    |             | 
|Total debt denominated in foreign currency                 |  |                                  |     |   |                |  |     |                         |  |  |                      |   |  |      |      |  |      |    | 35,968,060 |      |  |    | 44,074,945 |  |  |    | 69,674,348  | 
|                                                           |  |                                  |     |   |                |  |     |                         |  |  |                      |   |  |      |      |  |      |    |            |      |  |    |            |  |  |    |             | 
|                                                           |  |                                  |     |   |                |  |    
|Debt denominated in Mexican pesos:                         |  |                                  |     |   |                |  |     |                         |  |  |                      |   |  |      |      |  |      |    |            |      |  |    |            |  |  |    |             | 
|Senior notes                                               |  |                                  | 8.8 | % |                |  | 8.8 | %                       |  |  | 8.8                  | % |  |      | 2016 |  |      |    | 4,500,000  |      |  |    | 4,500,000  |  |  |    | 4,500,000   | 
|Domestic senior notes                                      |  |                                  | 6.4 | % |                |  | 6.3 | %                       |  |  | 6.3                  | % |  |      | 2037 |  |      |    | 21,400,000 |      |  |    | 25,900,000 |  |  |    | 25,900,000  | 
|América Móvil                                              |  |                                  | 5.0 | % |                |  |     |                         |  |  |                      |   |  |      | 2015 |  |      |    | 9,870,000  |      |  |    |            |  |  |    |             | 
|Bank loans                                                 |  |                                  | 5.4 | % |                |  | 5.5 | %                       |  |  | 4.8                  | % |  |      | 2012 |  |      |    | 55,000     |      |  |    | 46,000     |  |  |    | 2,800,000   | 
|                                                           |  |                                  |     |   |                |  |     |                         |  |  |                      |   |  |      |      |  |      |    |            |      |  |    |            |  |  |    |             | 
|Total debt denominated in Mexican pesos                    |  |                                  |     |   |                |  |     |                         |  |  |                      |   |  |      |      |  |      |    | 35,825,000 |      |  |    | 30,446,000 |  |  |    | 33,200,000  | 
|                                                           |  |                                  |     |   |                |  |     |                         |  |  |                      |   |  |      |      |  |      |    |            |      |  |    |            |  |  |    |             | 
|Total debt                                                 |  |                                  |     |   |                |  |     |                         |  |  |                      |   |  |      |      |  |      |    | 71,793,060 |      |  |    | 74,520,945 |  |  |    | 102,874,348 | 
|Less short-term debt and current portion of long-term debt |  |                                  |     |   |                |  |     |                         |  |  |                      |   |  |      |      |  |      |    | 12,675,567 |      |  |    | 11,951,532 |  |  |    | 19,768,894  | 
|                                                           |  |                                  |     |   |                |  |     |                         |  |  |                      |   |  |      |      |  |      |    |            |      |  |    |            |  |  |    |             | 
|Long-term debt                                             |  |                                  |     |   |                |  |     |                         |  |  |                      |   |  |      |      |  |      | P. | 59,117,493 |      |  | P. | 62,569,413 |  |  | P. | 83,105,454  | 
|                                                           |  |                                  |     |   |                |  |     |                         |  |  |                      |   |  |      |      |  |      |    |            |      |  |    |            |  |  |    |             | 

The above-mentioned rates are subject to market variances and do not include the effect of the
Companys agreement to reimburse certain lenders for Mexican withholding taxes. The Companys weighted-average cost of debt at December 31, 2011 (including interest expense, interest rate swaps, fees and withholding taxes, and
excluding exchange rate variances) was approximately 5.9% (6.6% in 2010 and 5.9% at January 1, 2010).

Short-term debt
and current portion of long-term debt consist of the following:



|                                   |  |                         |            |  |                       |    |            |      |  |    |            | 
|---------------------------------- |  | ----------------------- | ---------- |  | --------------------- | -- | ---------- | ---- |  | -- | ---------- | 
|                                   |  | Balance at December 31, |            |  | Balance at January 1, |   
|                                   |  | 2011                    |            |  | 2010                  |    |            | 2010 | 
|Short-term debt:                   |  |                         |            |  |                       |    |            |      |  |    |            | 
|Bank loans                         |  | P.                      | 55,000     |  |                       | P. | 46,000     |      |  |    |            | 
|América Móvil                      |  |                         |            |  |                       |    | 6,178,550  |      |  |    |            | 
|                                   |  |                         |            |  |                       |    |            |      |  |    |            | 
|                                   |  |                         | 55,000     |  |                       |    | 6,224,550  |      |  |    |            | 
|                                   |  |                         |            |  |                       |    |            |      |  |    |            | 
|Current portion of long-term debt: |  |                         |            |  |                       |    |            |      |  |    |            | 
|Senior notes                       |  |                         |            |  |                       |    |            |      |  | P. | 12,405,765 | 
|Domestic senior notes              |  |                         | 4,800,000  |  |                       |    | 4,500,000  |      |  |    |            | 
|Bank loans                         |  |                         | 7,820,567  |  |                       |    | 1,226,982  |      |  |    | 7,363,129  | 
|                                   |  |                         |            |  |                       |    |            |      |  |    |            | 
|                                   |  |                         | 12,620,567 |  |                       |    | 5,726,982  |      |  |    | 19,768,894 | 
|                                   |  |                         |            |  |                       |    |            |      |  |    |            | 
|Total                              |  | P.                      | 12,675,567 |  |                       | P. | 11,951,532 |      |  | P. | 19,768,894 | 
|                                   |  |                         |            |  |                       |    |            |      |  |    |            | 



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|9. | Debt (continued)
|-- | ----------------



Senior notes:



|a) | In the first quarter of 2005, TELMEX issued bonds in the amount of P.19,658,640 (U.S.$1,750 million), divided into two issuances of P.10,659,810 and P.8,998,830
(U.S.$950 million and U.S.$800 million, respectively), the first maturing in January 2010 and bearing an annual interest of 4.75%, and the second maturing in 2015 and bearing an annual interest of 5.5%. Interest is payable semiannually.
|-- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

On January 27, 2010, TELMEX repaid the first issuance for P.12,294,140 (U.S.$950 million). For the year
ended December 31, 2011, interest expense on these bonds was P.425,295 (P.628,617 in 2010).



|b) | On January 26, 2006, TELMEX issued abroad a bond denominated in Mexican pesos in the amount of P.4,500,000, which matures in 2016 and bears an annual interest of
8.75%. For the year ended December 31, 2011, interest expense on the bond was P.403,582 (P.406,656 in 2010).
|-- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|c) | On November 12, 2009, TELMEX issued a bond in the amount of P.6,615,400 (U.S.$500 million), which matures in 2019 and bears an annual interest of 5.5%, payable
semiannually. For the year ended December 31, 2011, interest expense on the bond was P.284,253 (P.367,648 in 2010).
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

On February 2, 2011, América Móvil launched a private offer to exchange any and all outstanding senior notes of TELMEX with maturity in 2015 and 2019, for new senior notes of
América Móvil. The offer expired on March 3, 2011. As a result of the offer, on March 8, 2011, U.S.$243.6 million of senior notes due in 2015 and U.S.$122.6 million of senior notes due in 2019 were exchanged for
América Móvil senior notes. On March 10, 2011, TELMEX paid América Móvil U.S.$394.0 million, which includes a premium of U.S.$27.8 million, to extinguish the exchanged senior notes. The consideration paid by TELMEX
was based on the same market conditions under which the TELMEX senior notes were exchanged by América Móvil.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|9. | Debt (continued)
|-- | ----------------



Syndicated loans:

In 2004, the Company entered into a syndicated loan, which was restructured in 2005 and 2006 to improve the credit conditions and increase the total loan amount to P.32,408,400 (U.S.$3,000 million) split
into three tranches. Tranche A for P.14,043,640 (U.S.$1,300 million) with a three-year maturity. Tranche B for P.10,802,800 (U.S.$1,000 million) with a five-year maturity. Tranche C for P.7,561,960 (U.S.$700 million) with a seven-year maturity. In
August 2009, TELMEX prepaid the total amount of tranche A, which was scheduled to mature in October 2009. In November 2010, TELMEX prepaid the total amount of tranche B, which was scheduled to mature in October 2011. The balance of tranche C at
December 31, 2011, is included under banks loans (debt denominated in foreign currency), and is scheduled to mature during 2012 and 2013. On March 21, 2012, TELMEX prepaid an amount of U.S.$235 million of tranche C, which was mainly
scheduled to mature in August 2012.

On June 30, 2006, TELMEX entered into a syndicated loan agreement in the amount of
P.5,595,050 (U.S.$500 million) split into two tranches in equal amounts of P.2,797,525 (U.S.$250 million) with maturities of four years and six years, respectively. In March 2010, TELMEX prepaid the total amount of the first tranche, for which the
original maturity was scheduled for June 2010. On March 6, 2012, TELMEX prepaid the total amount of the second tranche, for which the original maturity was scheduled for June 2012.

Substantially all of the bank loans bear interest equal to the London Inter-Bank Offered Rate (LIBOR) plus a specified margin. For the
year ended December 31, 2010, interest expense on these loans was P.166,924 (P.162,539 in 2010).

América Móvil:



|a) | On November 12, 2010, TELMEX entered into two loan agreements with América Móvil, the first one in the amount of P.2,454,280 (U.S.$200 million)
maturing in December 2010, and the second in the amount of P.6,135,700 (U.S.$500 million) maturing in October 2011. These loans beared interest equal to LIBOR plus a specified margin. Both loans were repaid on their maturity dates. In 2011, interest
expense on these loans was P.26,489 (P.6,048 in 2010).
|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|b) | In July, 2011, TELMEX entered into a revolving credit line in Mexican pesos with América Móvil maturing in July 2015. This loan bears interest equal to
the Mexican interbank equilibrium interest rate (TIIE) plus a margin of 20 basis points. During 2011, TELMEX drew down an amount of P.17,600,000 and made repayments amounting to P.6,230,000. From January through March 2012, TELMEX drew
down an additional amount of P.6,700,000 and made repayments amounting to P.1,200,000.
|-- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

On December 27,
2011, América Móvil partially transferred rights and obligations of a principal amount of P.11,370,000 of this credit to its subsidiary Sercotel, S.A. de C.V. (Sercotel). In December 2011 and January 2012, TELMEX repaid P.1,500,000 and
P.300,000 to Sercotel, respectively.

In 2011, interest expense on these loans was P.122,215.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|9. | Debt (continued)
|-- | ----------------



Domestic senior notes (Certificados Bursátiles):

On December 19, 2007, TELMEX obtained authorization from the CNBV for a program to issue long-term domestic senior notes in a total
amount of P.10,000,000. In April 2008, domestic senior notes in the amount of P.1,600,000 were issued. In July 2009, TELMEX placed domestic senior notes in two issuances for a total amount of P.8,000,000. In July 2011, TELMEX repaid P.4,000,000 of
the domestic senior notes issued in July 2009.

On September 18, 2009, TELMEX obtained authorization from the CNBV for a
dual program to issue short and long-term domestic senior notes in a total amount of P.15,000,000 (nominal amount). In November 2009, TELMEX placed long-term domestic senior notes in two issuances for a total amount of P.6,000,000.

Some domestic senior notes bear fixed-rate interest, while others bear interest equal to TIIE plus a specified margin. For the year ended
December 31, 2011, interest expense on long-term domestic senior notes was P.1,532,099 (P.1,663,516 in 2010).

Restrictions:

A portion of the debt is subject to certain restrictions with respect to maintaining certain financial ratios, as well
as restrictions on selling a significant portion of groups of assets, among others. At December 31, 2011, the Company was in compliance with all these requirements.

A portion of the debt is also subject to early maturity or repurchase at the option of the holders in the event of a change in control of the Company, as so defined in each instrument. The definition of
change in control varies from instrument to instrument; however, no change in control shall be considered to have occurred as long as Carso Global Telecom or its current shareholders continue to hold the majority of the Companys voting shares.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|9. | Debt (continued)
|-- | ----------------



Foreign currency debt:

An analysis of the foreign currency denominated debt at December 31, 2011 is as follows:



|             |  |                               |            |  |                                            |    |         |                             |  |    |            | 
|------------ |  | ----------------------------- | ---------- |  | ------------------------------------------ | -- | ------- | --------------------------- |  | -- | ---------- | 
|             |  | Foreigncurrency(in thousands) |            |  | Exchange rate atDecember 31,2011(in units) |    |         | Equivalent inMexican 
pesos | 
|U.S. dollar  |  |                               | 2,302,550  |  |                                            | P. | 13.9787 |                             |  | P. | 32,186,660 | 
|Japanese yen |  |                               | 19,891,200 |  |                                            |    | 0.1812  |                             |  |    | 3,604,285  | 
|Euro         |  |                               | 9,761      |  |                                            |    | 18.1444 |                             |  |    | 177,115    | 
|             |  |                               |            |  |                                            |    |         |                             |  |    |            | 
|Total        |  |                               |            |  |                                            |    |         |                             |  | P. | 35,968,060 | 
|             |  |                               |            |  |                                            |    |         |                             |  |    |            | 

Long-term debt maturities at December 31, 2011 are as follows:



|                    |  |        |            | 
|------------------- |  | ------ | ---------- | 
|Years               |  | Amount |           
|2013                |  | P.     | 11,867,163 | 
|2014                |  |        | 8,986,152  | 
|2015                |  |        | 18,537,891 | 
|2016                |  |        | 7,179,120  | 
|2017 and thereafter |  |        | 12,547,167 | 
|                    |  |        |            | 
|Total               |  | P.     | 59,117,493 | 
|                    |  |        |            | 



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|9. | Debt (continued)
|-- | ----------------



Derivative financial instruments and hedging activities:

At December 31, 2011 and 2010 and at January 1, 2010, the derivative financial instruments held by the Company are as follows:



|                             |  |                       |        |  |                              |    |        |                |  |       |                             |  |  |                |        |   |                             |       |        |  |  |    |        |  
|---------------------------- |  | --------------------- | ------ |  | ---------------------------- | -- | ------ | -------------- |  | ----- | --------------------------- |  |  | -------------- | ------ | - | --------------------------- | ----- | ------ |  |  | -- | ------ | -
|                             |  | (amounts in millions) |       
|                             |  | December 31,          |        |  | At January 1,2010            |   
|                             |  | 2011                  |        |  | 2010                         |    |       
|Instrument                   |  | Notionalamount        |        |  | Fair valueasset 
(liability) |    |        | Notionalamount |  |       | Fair valueasset (liability) |  |  | Notionalamount |        |   | Fair valueasset (liability) |      
|                             |  |                       |        |  |                              |   
|Asset:                       |  |                       |        |  |                              |    |        |                |  |       |                             |  |  |                |        |   |                             |       |        |  |  |    |        |  
|Cross currency swaps         |  | U.S.$                 | 2,101  |  |                              | P. | 6,115  |                |  | U.S.$ | 3,487                       |  |  | P.             | 6,696  |   |                             | U.S.$ | 4,178  |  |  | P. | 12,088 |  
|                             |  |                       |        |  |                              |    |        |                |  |       |                             |  |  |                |        |   |                             |       |        |  |  |    |        |  
|                             |  |                       |        |  |                              |   
|Liabilities:                 |  |                       |        |  |                              |    |        |                |  |       |                             |  |  |                |        |   |                             |       |        |  |  |    |        |  
|Interest-rate swaps in pesos |  | P.                    | 12,840 |  |                              | P. | (1,496 | )              |  | P.    | 16,649                      |  |  | P.             | (1,526 | ) |                             | P.    | 23,752 |  |  | P. | (729   | )
|Forwards dollar-peso         |  |                       |        |  |                              |    |        |                |  | U.S.$ | 40                          |  |  |                | (21    | ) |                             | U.S.$ | 245    |  |  |    | (120   | )
|Cross currency coupon swaps  |  |                       |        |  |                              |    |        |                |  |       |                             |  |  |                |        |   |                             | U.S.$ | 50     |  |  |    |        |  
|                             |  |                       |        |  |                              |    |        |                |  |       |                             |  |  |                |        |   |                             |       |        |  |  |    |        |  
|Total                        |  |                       |        |  |                              | P. | (1,496 | )              |  |       |                             |  |  | P.             | (1,547 | ) |                             |       |        |  |  | P. | (849   | )
|                             |  |                       |        |  |                              |    |        |                |  |       |                             |  |  |                |        |   |                             |       |        |  |  |    |        |  

To reduce the risks related to fluctuations in exchange and interest rates, the Company uses derivative
financial instruments as hedges associated with its debt. The derivative financial instruments principally used by the Company are as follows:

Cross currency swaps

At
December 31, 2011, the Company had cross currency swaps that hedge foreign currency denominated liabilities of P.29,363,270 (U.S.$2,101 million) (P.43,091,161 or U.S.$3,487 million at December 31, 2010) (P.54,557,723 or U.S.$4,178 at
January 1, 2010), These cross currency swaps hedge the exchange rate and interest rate risks associated with bonds that mature in 2015 and 2019 in the total amount of U.S.$739 million and bank loans that mature from 2011 to 2018 of U.S.$1,362
million. These agreements allow the Company to fix the parity of such debt at a weighted-average exchange rate of P.10.9869 per U.S. dollar, as well as to set a fixed interest rate of 8.59% for the bond maturing in 2015 and a floating rate equal to
the average 28-day TIIE less a specified margin for the bond maturing in 2019 and for the bank loans.

The change in the fair
value of these cross currency swaps that offset the exchange gain on the foreign-currency denominated debt for the year ended December 31, 2011 was a net charge of P.4,625,428 (charge of P.2,108,445 in 2010).



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|9. | Debt (concluded)
|-- | ----------------



Forwards dollar-peso

At December 31, 2011, the Company had no foreign currency forward contracts outstanding. At December 31, 2010, the Company had short-term foreign currency forwards with a notional amount of
P.494,284 (U.S.$40 million) (P.3,199,382 or U.S.$245 million at January 1, 2010). For the year ended December 31, 2011, the Company recognized a net charge of P.12,094 (charge of P.97,295 in 2010), as part of the net exchange gain, due to
changes in the fair value of these forwards.

Interest-rate swaps

At December 31, 2011, the Company had interest-rate swaps for an aggregate notional amount of P.12,840,470 (P.16,649,250 at
December 31, 2010) (P.23,752,125 at January 1, 2010), to hedge the floating interest rate risk of its debt in Mexican pesos, fixing such rate at an average of 8.46%.

At January 1, 2010, the Company had cross currency coupon swap contracts that hedged interest payment cash flows of P.652,935 (U.S.$50 million).

In 2011, the Company recognized a net expense for these swaps in interest expense of P.958,835 (P.1,687,679 in 2010).

In 2011, the ineffective portion of the cash flow hedges was a net expense of P.586,793 (P.506,815 in 2010), recognized in interest
expense.

The Companys derivatives are acquired in over-the counter markets, mostly from the same financial institutions
with which it has contracted its debt.

Several of the Companys agreements under which it has negotiated its derivative
financial instruments require margin calls when the fair value of the derivatives exceeds the Companys existing credit lines of P.5,940,948 (U.S.$425 million). At December 31, 2011, 58% of the Companys outstanding derivatives
correspond to these types of agreements; however, no margin calls had been required at such date.



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|10. | Accounts Payable and Accrued Liabilities
|--- | ----------------------------------------

An analysis of accounts payable and accrued liabilities is as follows:



|                                                |  |              |            |  |                    |    |            |  |  |    |            | 
|----------------------------------------------- |  | ------------ | ---------- |  | ------------------ | -- | ---------- |  |  | -- | ---------- | 
|                                                |  | December 31, |            |  | At January 
1,2010 |   
|                                                |  | 2011         |            |  | 2010               |    |           
|Suppliers                                       |  | P.           | 8,407,930  |  |                    | P. | 4,426,398  |  |  | P. | 2,081,727  | 
|Employee benefits                               |  |              | 2,613,866  |  |                    |    | 3,017,073  |  |  |    | 2,804,324  | 
|Related parties (Note 15)                       |  |              | 786,186    |  |                    |    | 1,314,356  |  |  |    | 1,602,128  | 
|Vacation accrual                                |  |              | 1,371,449  |  |                    |    | 1,333,231  |  |  |    | 1,284,578  | 
|Accrual for other contractual employee benefits |  |              | 1,043,700  |  |                    |    | 1,104,135  |  |  |    | 1,230,645  | 
|Dividends payable                               |  |              | 1,144,341  |  |                    |    | 1,123,388  |  |  |    | 1,106,119  | 
|Sundry creditors                                |  |              | 1,122,254  |  |                    |    | 956,722    |  |  |    | 750,440    | 
|Interest payable                                |  |              | 560,823    |  |                    |    | 625,986    |  |  |    | 936,516    | 
|Other                                           |  |              | 1,957,619  |  |                    |    | 1,384,253  |  |  |    | 1,600,225  | 
|                                                |  |              |            |  |                    |    |            |  |  |    |            | 
|                                                |  | P.           | 19,008,168 |  |                    | P. | 15,285,542 |  |  | P. | 13,396,702 | 
|                                                |  |              |            |  |                    |    |            |  |  |    |            | 

The activity in the main accruals for the years ended December 31, 2011 and 2010 is as follows:

Vacation accrual:



|                               |  |      |            |   |      |    |            |  
|------------------------------ |  | ---- | ---------- | - | ---- | -- | ---------- | -
|                               |  | 2011 |            |   | 2010 |   
|Beginning balance at January 1 |  | P.   | 1,333,231  |   |      | P. | 1,284,578  |  
|Increase charged to expenses   |  |      | 1,750,249  |   |      |    | 1,701,334  |  
|Payments                       |  |      | (1,712,031 | ) |      |    | (1,652,681 | )
|                               |  |      |            |   |      |    |            |  
|Ending balance at December 31  |  | P.   | 1,371,449  |   |      | P. | 1,333,231  |  
|                               |  |      |            |   |      |    |            |  

Accrual for other contractual employee benefits:



|                               |  |      |            |   |      |    |            |  
|------------------------------ |  | ---- | ---------- | - | ---- | -- | ---------- | -
|                               |  | 2011 |            |   | 2010 |   
|Beginning balance at January 1 |  | P.   | 1,104,135  |   |      | P. | 1,230,645  |  
|Increase charged to expenses   |  |      | 3,614,663  |   |      |    | 3,528,045  |  
|Payments                       |  |      | (3,675,098 | ) |      |    | (3,654,555 | )
|                               |  |      |            |   |      |    |            |  
|Ending balance at December 31  |  | P.   | 1,043,700  |   |      | P. | 1,104,135  |  
|                               |  |      |            |   |      |    |            |  



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|11. | Deferred Revenues
|--- | -----------------

Deferred revenues consist of the following at December 31, 2011 and 2010, and at January 1, 2010:



|                        |  |              |           |  |                    |    |           |  |  |    |           | 
|----------------------- |  | ------------ | --------- |  | ------------------ | -- | --------- |  |  | -- | --------- | 
|                        |  | December 31, |           |  | At January 
1,2010 |   
|                        |  | 2011         |           |  | 2010               |    |          
|Short-term:             |  |              |           |  |                    |    |           |  |  |    |           | 
|Advance billings        |  | P.           | 1,195,614 |  |                    | P. | 889,823   |  |  | P. | 1,005,480 | 
|Advances from customers |  |              | 83,698    |  |                    |    | 26,269    |  |  |    | 94,572    | 
|                        |  |              |           |  |                    |    |           |  |  |    |           | 
|                        |  |              | 1,279,312 |  |                    |    | 916,092   |  |  |    | 1,100,052 | 
|Long-term:              |  |              |           |  |                    |    |           |  |  |    |           | 
|Advance billings        |  |              | 1,128,625 |  |                    |    | 611,873   |  |  |    | 457,800   | 
|                        |  |              |           |  |                    |    |           |  |  |    |           | 
|Total                   |  | P.           | 2,407,937 |  |                    | P. | 1,527,965 |  |  | P. | 1,557,852 | 
|                        |  |              |           |  |                    |    |           |  |  |    |           | 

At December 31, 2011 and 2010 the activity is as follows:



|                               |  |      |            |   |      |    |            |  
|------------------------------ |  | ---- | ---------- | - | ---- | -- | ---------- | -
|                               |  | 2011 |            |   | 2010 |   
|Beginning balance at January 1 |  | P.   | 1,527,965  |   |      | P. | 1,557,852  |  
|Increases during the year      |  |      | 9,820,192  |   |      |    | 9,213,919  |  
|Recognized in revenues         |  |      | (8,940,220 | ) |      |    | (9,243,806 | )
|                               |  |      |            |   |      |    |            |  
|Ending balance at December 31, |  | P.   | 2,407,937  |   |      | P. | 1,527,965  |  
|                               |  |      |            |   |      |    |            |  

Deferred revenues consist of revenues obtained for services that will be provided to customers within a
certain period. Deferred revenues are recognized in the statement of income when they are realized. As of December 31, 2011, deferred revenues include P.851,595 related to services to be rendered to a related party on a long-term basis.



|12. | Employee Benefits
|--- | -----------------

Pension plans and
seniority premiums

The majority of the Companys employees are covered under defined benefit pension plans and
seniority premiums. Pension benefits and seniority premiums are determined on the basis of compensation of employees in their final year of employment, their seniority, and their age at the time of retirement.

The Company has set up an irrevocable trust fund to finance these employee benefits and has adopted the policy of making contributions to
such fund when it is considered necessary, which are deductible for Mexican corporate income tax and employee profit sharing purposes. The most important information related to employee benefits is as follows:



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|12. | Employee Benefits (continued)
|--- | -----------------------------



Analysis of net periodic cost:



|                                                   |  |              |             |   |      |    |             |  
|-------------------------------------------------- |  | ------------ | ----------- | - | ---- | -- | ----------- | -
|                                                   |  | December 31, |            
|                                                   |  | 2011         |             |   | 2010 |   
|Labor cost                                         |  | P.           | 5,036,684   |   |      | P. | 4,850,844   |  
|Finance cost on defined benefit obligation         |  |              | 19,418,689  |   |      |    | 17,751,583  |  
|Projected return on plan assets                    |  |              | (21,665,379 | ) |      |    | (19,680,678 | )
|Amortization of past service cost                  |  |              | 23,705      |   |      |    | 23,705      |  
|Amortization of variances in actuarial assumptions |  |              | 2,621,515   |   |      |    | 2,418,254   |  
|                                                   |  |              |             |   |      |    |             |  
|Net periodic cost                                  |  | P.           | 5,435,214   |   |      | P. | 5,363,708   |  
|                                                   |  |              |             |   |      |    |             |  

Analysis of changes in the defined benefit obligation:



|                                                |  |              |             |   |      |    |             |  
|----------------------------------------------- |  | ------------ | ----------- | - | ---- | -- | ----------- | -
|                                                |  | December 31, |            
|                                                |  | 2011         |             |   | 2010 |   
|Defined benefit obligation at beginning of year |  | P.           | 216,927,167 |   |      | P. | 197,332,833 |  
|Labor cost                                      |  |              | 5,036,684   |   |      |    | 4,850,844   |  
|Finance cost on defined benefit obligation      |  |              | 19,418,689  |   |      |    | 17,751,583  |  
|Actuarial loss                                  |  |              | 5,025,389   |   |      |    | 7,608,718   |  
|Benefits paid to employees                      |  |              | (11,472,579 | ) |      |    | (6,438,985  | )
|Payments from trust fund                        |  |              | (710,120    | ) |      |    | (4,177,826  | )
|                                                |  |              |             |   |      |    |             |  
|Defined benefit obligation at end of year       |  | P.           | 234,225,230 |   |      | P. | 216,927,167 |  
|                                                |  |              |             |   |      |    |             |  

Analysis of changes in plan assets:



|                                      |  |              |             |   |      |    |             |  
|------------------------------------- |  | ------------ | ----------- | - | ---- | -- | ----------- | -
|                                      |  | December 31, |            
|                                      |  | 2011         |             |   | 2010 |   
|Established fund at beginning of year |  | P.           | 180,580,128 |   |      | P. | 163,995,375 |  
|Projected return on plan assets       |  |              | 21,665,379  |   |      |    | 19,680,678  |  
|Actuarial (loss) gain                 |  |              | (16,988,768 | ) |      |    | 1,081,612   |  
|Contributions to trust fund           |  |              |             |   |      |    | 289         |  
|Payments from trust fund              |  |              | (710,120    | ) |      |    | (4,177,826  | )
|                                      |  |              |             |   |      |    |             |  
|Established fund at end of year       |  | P.           | 184,546,619 |   |      | P. | 180,580,128 |  
|                                      |  |              |             |   |      |    |             |  



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|12. | Employee Benefits (continued)
|--- | -----------------------------



Analysis of the net projected asset:



|                                                            |  |              |             |   |                    |    |             |   |  |    |             |  
|----------------------------------------------------------- |  | ------------ | ----------- | - | ------------------ | -- | ----------- | - |  | -- | ----------- | -
|                                                            |  | December 31, |             |   | At January 
1,2010 |   
|                                                            |  | 2011         |             |   | 2010               |    |            
|Insufficiency of plan assets for defined benefit obligation |  | P.           | (49,678,611 | ) |                    | P. | (36,347,039 | ) |  | P. | (33,337,458 | )
|Unamortized actuarial loss                                  |  |              | 71,964,612  |   |                    |    | 52,571,970  |   |  |    | 48,463,118  |  
|Past service cost and changes to plan                       |  |              | 41,732      |   |                    |    | 65,437      |   |  |    | 89,142      |  
|                                                            |  |              |             |   |                    |    |             |   |  |    |             |  
|Net projected asset                                         |  | P.           | 22,327,733  |   |                    | P. | 16,290,368  |   |  | P. | 15,214,802  |  
|                                                            |  |              |             |   |                    |    |             |   |  |    |             |  

In 2011, the net actuarial loss of P.22,014,157 resulted from (i) the effect of an unfavorable
actuarial variance of P.16,988,768 due to the behavior of the plan assets resulting from a decrease in the value of the trust funds investments in shares of companies and in fixed-yield investments due to variances in reference rates, and
(ii) an actuarial loss of P.5,025,389 attributable principally to the fact that the number of employees who retired was greater than the number estimated at the beginning of the year, and the salary and pension benefits of the retired employees
were higher than estimated at the beginning of the year.

In 2010, the net actuarial loss of P.6,527,106 resulted from
(i) the effect of a favorable actuarial variance of P.1,081,612 due to the behavior of the plan assets resulting from an increase in the value of the trust funds investments in shares of companies and in fixed-yield investments due to
variances in reference rates, and (ii) an actuarial loss of P.7,608,718 attributable principally to the fact that the number of employees who retired was greater than the number estimated at the beginning of the year, and the salary and pension
benefits of the retired employees were higher than estimated at the beginning of the year.

At December 31, 2011 and
2010, the rates used in the actuarial study are as follows:



|                               |  |               
|------------------------------ |  | --------------
|                               |  | Nominal rates%
|Discount of employee benefits: |  |               
|Long-term average              |  | 9.2           
|Increase in salaries:          |  |               
|Long-term average              |  | 4.5           



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|12. | Employee Benefits (concluded)
|--- | -----------------------------



Plan assets:

The percentages invested in plan assets are as follows:



|                   |  |                 |       |  |                    |  |       |  |  |  |       | 
|------------------ |  | --------------- | ----- |  | ------------------ |  | ----- |  |  |  | ----- | 
|                   |  | At December 31, |       |  | At January 
1,2010 | 
|                   |  | 2011            |       |  | 2010               |  |      
|Debt instruments   |  |                 | 49.6  |  |                    |  | 46.4  |  |  |  | 45.9  | 
|Equity instruments |  |                 | 50.4  |  |                    |  | 53.6  |  |  |  | 52.7  | 
|Other investments  |  |                 |       |  |                    |  |       |  |  |  | 1.4   | 
|                   |  |                 |       |  |                    |  |       |  |  |  |       | 
|                   |  |                 | 100.0 |  |                    |  | 100.0 |  |  |  | 100.0 | 
|                   |  |                 |       |  |                    |  |       |  |  |  |       | 

As of December 31, 2011, the fair value of TELMEXs securities held by the plan assets was
P.1,482,834 (P.3,368,416 at December 31, 2010). Also, the plan assets include 44.4% and 44.7% of securities of related parties at December 31, 2011 and 2010, respectively. The purchases and sales of these
securities made by the plan were at market value.



|13. | Other Financial Assets and Liabilities
|--- | --------------------------------------

Fair Value Hierarchy

At
December 31, 2011 and 2010 and at January 1, 2010, TELMEX had financial instruments measured at fair value in its consolidated statement of financial position as follows.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|13. | Other Financial Assets and Liabilities (concluded)
|--- | --------------------------------------------------



|                    |  |                                                |             |  |         |    |            |         |  |       |  |    |             | 
|------------------- |  | ---------------------------------------------- | ----------- |  | ------- | -- | ---------- | ------- |  | ----- |  | -- | ----------- | 
|                    |  | Measurement of fair value at December 31, 2011 |            
|                    |  | Level 1                                        |             |  | Level 2 |    |            | Level 3 |  | Total | 
|Assets              |  |                                                |             |  |         |    |            |         |  |       |  |    |             | 
|Derivatives         |  |                                                |             |  |         | P. | 6,114,677  |         |  |       |  | P. | 6,114,677   | 
|Pension plan assets |  | P.                                             | 184,546,619 |  |         |    |            |         |  |       |  |    | 184,546,619 | 
|                    |  |                                                |             |  |         |    |            |         |  |       |  |    |             | 
|Total               |  | P.                                             | 184,546,619 |  |         | P. | 6,114,677  |         |  |       |  | P. | 190,661,296 | 
|                    |  |                                                |             |  |         |    |            |         |  |       |  |    |             | 
|                    |  |                                                |             | 
|Liabilities         |  |                                                |             |  |         |    |            |         |  |       |  |    |             | 
|Debt                |  | P.                                             | 40,654,330  |  |         | P. | 32,238,457 |         |  |       |  | P. | 72,892,787  | 
|Derivatives         |  |                                                |             |  |         |    | 1,496,359  |         |  |       |  |    | 1,496,359   | 
|                    |  |                                                |             |  |         |    |            |         |  |       |  |    |             | 
|Total               |  | P.                                             | 40,654,330  |  |         | P. | 33,734,816 |         |  |       |  | P. | 74,389,146  | 
|                    |  |                                                |             |  |         |    |            |         |  |       |  |    |             | 



|                    |  |                                                |             |  |         |    |            |         |  |       |  |    |             | 
|------------------- |  | ---------------------------------------------- | ----------- |  | ------- | -- | ---------- | ------- |  | ----- |  | -- | ----------- | 
|                    |  | Measurement of fair value at December 31, 2010 |            
|                    |  | Level 1                                        |             |  | Level 2 |    |            | Level 3 |  | Total | 
|Assets              |  |                                                |             |  |         |    |            |         |  |       |  |    |             | 
|Derivatives         |  |                                                |             |  |         | P. | 6,695,899  |         |  |       |  | P. | 6,695,899   | 
|Pension plan assets |  | P.                                             | 180,580,128 |  |         |    |            |         |  |       |  |    | 180,580,128 | 
|                    |  |                                                |             |  |         |    |            |         |  |       |  |    |             | 
|Total               |  | P.                                             | 180,580,128 |  |         | P. | 6,695,899  |         |  |       |  | P. | 187,276,027 | 
|                    |  |                                                |             |  |         |    |            |         |  |       |  |    |             | 
|                    |  |                                                |             | 
|Liabilities         |  |                                                |             |  |         |    |            |         |  |       |  |    |             | 
|Debt                |  | P.                                             | 48,176,958  |  |         | P. | 27,630,582 |         |  |       |  | P. | 75,807,540  | 
|Derivatives         |  |                                                |             |  |         |    | 1,547,054  |         |  |       |  |    | 1,547,054   | 
|                    |  |                                                |             |  |         |    |            |         |  |       |  |    |             | 
|Total               |  | P.                                             | 48,176,958  |  |         | P. | 29,177,636 |         |  |       |  | P. | 77,354,594  | 
|                    |  |                                                |             |  |         |    |            |         |  |       |  |    |             | 



|                    |  |                                              |             |  |         |    |            |         |  |       |  |    |             | 
|------------------- |  | -------------------------------------------- | ----------- |  | ------- | -- | ---------- | ------- |  | ----- |  | -- | ----------- | 
|                    |  | Measurement of fair value at January 1, 2010 |            
|                    |  | Level 1                                      |             |  | Level 2 |    |            | Level 3 |  | Total | 
|Assets              |  |                                              |             |  |         |    |            |         |  |       |  |    |             | 
|Derivatives         |  |                                              |             |  |         | P. | 12,088,437 |         |  |       |  | P. | 12,088,437  | 
|Pension plan assets |  | P.                                           | 163,995,375 |  |         |    |            |         |  |       |  |    | 163,995,375 | 
|                    |  |                                              |             |  |         |    |            |         |  |       |  |    |             | 
|Total               |  | P.                                           | 163,995,375 |  |         | P. | 12,088,437 |         |  |       |  | P. | 176,083,812 | 
|                    |  |                                              |             |  |         |    |            |         |  |       |  |    |             | 
|                    |  |                                              |             | 
|Liabilities         |  |                                              |             |  |         |    |            |         |  |       |  |    |             | 
|Debt                |  | P.                                           | 59,102,292  |  |         | P. | 41,953,744 |         |  |       |  | P. | 101,056,036 | 
|Derivatives         |  |                                              |             |  |         |    | 848,824    |         |  |       |  |    | 848,824     | 
|                    |  |                                              |             |  |         |    |            |         |  |       |  |    |             | 
|Total               |  | P.                                           | 59,102,292  |  |         | P. | 42,802,568 |         |  |       |  | P. | 101,904,860 | 
|                    |  |                                              |             |  |         |    |            |         |  |       |  |    |             | 

For the years ended December 31, 2011 and 2010, no transfers were made between Level 1 and Level 2
fair value measurement techniques.

The fair value of cash and cash equivalents, accounts receivables, accounts payables and
other current liabilities approximate their carrying amounts largely due to the short-term maturities of these instruments.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|14. | Commitments and Contingencies
|--- | -----------------------------

Commitments

At
December 31, 2011, TELMEX has commitments for the purchase of equipment of P.10,143,202 (P.4,563,286 in 2010), which include P.1,155,645 (P.1,338,560 in 2010) of commitments with related parties. Payments made under the related purchase
agreements aggregated to P.3,974,739 in 2011 (P.2,628,469 in 2010).

Contingencies

a) In November 2005, COFETEL issued the guidelines for making changes to local service areas. In April 2006, Teléfonos de
México, S.A.B. de C.V. filed a motion for an administrative review of COFETELs guidelines for modifying the local service areas. Such motion was denied by the Communications Ministry (Secretaría de Comunicaciones y
Transportes, or SCT) and is currently in litigation before the Third Regional Metropolitan Chamber of the Federal Tax and Administrative Court.

In March 2007, COFETEL ordered the consolidation of a package of 70 local service areas and a package of 2 local service areas while, in September 2008 it ordered the consolidation of another package of
125 local service areas and in December 2008, it ordered the consolidation of one local service area, each with its own schedule. Teléfonos de México, S.A.B. de C.V. has challenged COFETELs orders through the corresponding legal
procedures.

In November 2009, in compliance with the ruling issued by the Full Circuit Court in Administrative Matters, the
court declared the resolutions issued by COFETEL to be null and void.

If the validity of COFETELs ruling is eventually
recognized, COFETEL may be able to re-initiate proceedings to require the consolidation of the local service areas.

Should
the consolidation requirement ever become effective, there could be an adverse effect on the Companys long-distance revenues.

The Company believes, based on the advice of external lawyers who are handling this matter, that although the Companys arguments are well-founded, there is no certainty that Teléfonos de
México, S.A.B. de C.V. will obtain favorable results.

b) Since 2007, the Federal Commission of Economic Competition
(COFECO) initiated eight investigations to evaluate if Teléfonos de México, S.A.B. de C.V. (onward Telmex) and Teléfonos del Noroeste, S.A. de C.V., (onward Telnor) have substantial power and engages in
monopolistic practices in certain markets.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|14. | Commitments and Contingencies (continued)
|--- | -----------------------------------------



The preliminary findings of four of these probes have been issued, in which COFECO has
determined that Telmex and Telnor have substantial control in the following areas: (i) termination of public switched traffic; (ii) origination of public switched traffic; (iii) local transit services; and (iv) leasing of lines
or circuits. Telmex and Telnor have expressed their disagreement with the proceedings, and later challenged the findings and submitted evidence against the allegations.

In the four markets in question, COFECO has already confirmed its resolutions and Telmex and Telnor filed the applicable motions for appeal, which COFECO denied. Telmex and Telnor have filed relief
(amparo) proceedings against COFECOs denial of the motions for appeal. The rulings in some of these relief proceedings have already been handed down, while others are still pending.

In the case of the origination of public switched traffic and the leasing of lines or circuits markets, the courts upheld the denial of
the motions for appeal filed by Telnor, which effectively upheld COFECOs judgment that Telnor had substantial control over these markets.

In the case of the origination of public switched traffic market, through a proceeding, the COFETEL may mandate specific obligations for Telnor in such market.

In the case of the wholesale market for leasing of private circuits, in October 2011, the SCT and COFETEL submitted a draft of an
agreement regarding the specific obligations for the Company related to prices, service quality, and information, for review by the Federal Commission for the Improvement of Regulations (COFEMER). In March 2012, COFEMER issued a complete final
ruling on this draft project and in April 2012, COFETEL published the agreement in the Official Gazette. The Company believes that if the agreement is deemed to apply to Telnor, it would have an adverse impact on the Companys revenues
and results of operations. The Company will therefore consider all appropriate legal challenges to the agreements applicability to Telnor.

In the case of the termination of public switched traffic market, by way of its denial of the Companys motions for appeal, COFECO has already confirmed its original ruling that Telmex and Telnor
have substantial control. As a result of this confirmation, Telmex and Telnor filed relief (amparo) proceedings, which are still pending resolution.

Lastly, in the case of the transit services rendered to other long-distance services providers related to the package of 198 local service areas, Telmex and Telnor are waiting for rulings on the relief
(amparo) proceedings filed by them against COFECOs final reports in which it determined that Telmex and Telnor have substantial control over this market.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|14. | Commitments and Contingencies (continued)
|--- | -----------------------------------------



If the disputed resolutions are ultimately upheld, COFETEL, after completing the
applicable procedure, may establish specific obligations for the Company regarding the prices, quality of services and information in the markets in question. The exact nature of these regulations and their impact on the business cannot be known in
advance, but they will likely reduce the Companys flexibility and its ability to adopt competitive market policies. It is also impossible to predict what timeframe the Company will take to adopt the new regulations and whether it will actually
be able to do so.

Regarding the four remaining probes, as a result of its probe into the fixed-network interconnection
services market, COFECO has determined that Telmex engaged in monopolistic practices. Telmex has filed relief (amparo) proceedings against this ruling and their cases are pending resolution. Regarding the broad-band internet market for
domestic residential customers and the interurban transport for switched long-distance traffic services markets, COFECO ordered the probes closed upon determining that there is no evidence that Telmex and Telnor engaged in monopolistic practices.
Lastly, with respect to the local and national long-distance dedicated links wholesale leasing services market, COFECO issued and notified to Telmex and Telnor probable fault (Oficio de Probable Responsabilidad) which the Company will object.

There is no certainty as to what the outcome of these probes will be, but they may be against the interests of Telmex and
Telnor and result in regulations, restrictions or monetary fines being imposed on both companies.

The Company believes, based
on the advice of external lawyers who are handling this matter, that although the Companys arguments are well-founded, there is no certainty that Telmex and Telnor will obtain favorable results.

c) The Mexican Social Security Institute (IMSS) audited Teléfonos de México, S.A.B. de C.V. for the 1997-2001 period. At
the conclusion of the audit, IMSS determined that Teléfonos de México, S.A.B. de C.V. owed a total of approximately P.330,000 (historical amount), in taxes, fines, surcharges and re-expression for inflation at July 2, 2003.
Teléfonos de México, S.A.B. de C.V. filed an appeal to nullify these findings and related assessment with the Federal Court of Justice for Tax and Administrative Matters. In accordance with Mexican law, by means of a trust fund
established with a banking institution, the Company guaranteed payment of the tax assessment in the amount of P.568,869 through July 19, 2010. The Regional Metropolitan Chamber court nullified the ruling; however, IMSS filed a motion for
appeal. In October 2009, the court handling the appeal ruled in favor of the Company. Therefore, the ruling issued on the nullity of the fee settlement schedules became final. Consequently, Teléfonos de México, S.A.B. de C.V. initiated
proceedings to dissolve the trust fund guaranteeing the payment of the amounts sought by IMSS. The trust was dissolved on January 22, 2010, which was the date on which Teléfonos de México; S.A.B. de C.V. recognized the income from
canceling this contingency.

As a result, since the tax liabilities have been annulled and the amount pledged in guaranty was
returned to Teléfonos de México, S.A.B. de C.V. on January 22, 2010, this matter is considered closed.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|14. | Commitments and Contingencies (concluded)
|--- | -----------------------------------------



d) On February 10, 2009, COFETEL published a Fundamental Technical Plan of
Interconnection and Inter-operability, or the Fundamental Technical Plan in the Official Gazette. As it is currently worded, the Fundamental Technical Plan could have a negative impact on both Telmex and Telnor, and on the telecommunications
sector in general, since it establishes certain obligations for telephone service providers.

Telmex and Telnor have legally
challenged the plan through a number of available channels and have presented evidence to demonstrate the illegality and unconstitutionality of the Fundamental Technical Plan. Telmexs case is pending resolution, while Telnor was granted relief
(amparo) against the Fundamental Technical Plan. As a result of this ruling, the Fundamental Technical Plan shall no longer be applicable to Telnor and shall nullify any resolutions handed down against Telnor under the Plan.

The Company believes, based on the advice of external lawyers who are handling this matter, that although the Companys arguments
are well-founded, there is no certainty that Telmex and Telnor will obtain favorable results.



|15. | Related Parties
|--- | ---------------

a) An
analysis of balances due from/to related parties is provided below. All the companies are considered affiliates since TELMEXs primary shareholders are also either direct or indirect shareholders of the related parties:



|                                                              |  |                 |         |  |               |  |           |      |  |    |         | 
|------------------------------------------------------------- |  | --------------- | ------- |  | ------------- |  | --------- | ---- |  | -- | ------- | 
|                                                              |  | At December 31, |         |  | At January 1, | 
|                                                              |  | 2011            |         |  | 2010          |  |           | 2010 | 
|Accounts receivable:                                          |  |                 |         |  |               |  |           |      |  |    |         | 
|Sercotel, S.A. de C.V.                                        |  | P.              | 324,101 |  |               |  | P.165,824 |      |  | P. | 193,316 | 
|Radiomovil Dipsa, S.A. de C.V.                                |  |                 | 82,593  |  |               |  |           |      |  |    |         | 
|Sears Operadora México, S.A. de C.V.                          |  |                 | 56,458  |  |               |  |           |      |  |    |         | 
|Sanborn Hermanos, S.A.                                        |  |                 | 37,267  |  |               |  | 15,495    |      |  |    | 6,397   | 
|Grupo Técnico de Servicios, S.A. de C.V.                      |  |                 | 26,414  |  |               |  | 7,741     |      |  |    | 2,460   | 
|Anuncios en Directorios, S.A. de C.V.                         |  |                 | 25,474  |  |               |  | 44,319    |      |  |    | 27,662  | 
|Controladora de Servicios de Telecomunicaciones, S.A. de C.V. |  |                 | 23,965  |  |               |  | 5,647     |      |  |    | 18,235  | 
|AT&T, Inc.                                                    |  |                 | 19,005  |  |               |  | 25,897    |      |  |    | 87,885  | 
|Claro 155, S.A.                                               |  |                 | 17,403  |  |               |  |           |      |  |    |         | 
|Telmex Colombia, S.A.                                         |  |                 | 12,438  |  |               |  | 25,162    |      |  |    |         | 
|Sears Roebuck de México, S.A. de C.V.                         |  |                 |         |  |               |  | 16,874    |      |  |    | 14,231  | 
|Alestra, S. de R.L. de C.V.                                   |  |                 |         |  |               |  | 490,773   |      |  |    | 454,762 | 
|Otras                                                         |  |                 | 59,287  |  |               |  | 95,054    |      |  |    | 89,587  | 
|                                                              |  |                 |         |  |               |  |           |      |  |    |         | 
|                                                              |  | P.              | 684,405 |  |               |  | P.892,786 |      |  | P. | 894,535 | 
|                                                              |  |                 |         |  |               |  |           |      |  |    |         | 



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|15. | Related Parties (continued)
|--- | ---------------------------



|                                                                       |  |                 |           |  |               |    |           |      |  |    |           | 
|---------------------------------------------------------------------- |  | --------------- | --------- |  | ------------- | -- | --------- | ---- |  | -- | --------- | 
|                                                                       |  | At December 31, |           |  | At January 1, |   
|                                                                       |  | 2011            |           |  | 2010          |    |           | 2010 | 
|Accounts payable:                                                      |  |                 |           |  |               |    |           |      |  |    |           | 
|PC Industrial, S.A. de C.V.                                            |  | P.              | 168,890   |  |               | P. | 98,735    |      |  | P. | 29,614    | 
|Operadora Cicsa, S.A. de C.V.                                          |  |                 | 161,936   |  |               |    | 134,040   |      |  |    | 5,940     | 
|Eidon Services, S.A. de C.V.                                           |  |                 | 64,079    |  |               |    | 106,186   |      |  |    |           | 
|Empresa Brasileira de Telecomunicaçöes, S.A.                           |  |                 | 48,353    |  |               |    | 9,798     |      |  |    | 10,145    | 
|Microm, S.A. de C.V.                                                   |  |                 | 45,970    |  |               |    | 52,008    |      |  |    | 65,349    | 
|Grupo Financiero Inbursa, S.A.B. de C.V.                               |  |                 | 45,729    |  |               |    | 59,723    |      |  |    | 50,695    | 
|Consorcio Ecuatoriano de Telecomunicaciones, S.A.                      |  |                 | 38,416    |  |               |    | 13,108    |      |  |    |           | 
|Fianzas Guardiana Inbursa, S.A.                                        |  |                 | 32,526    |  |               |    | 818       |      |  |    | 3,696     | 
|Sinergia Soluciones Integrales para la Construcción, S.A. de C.V.      |  |                 | 29,457    |  |               |    | 31,319    |      |  |    | 4,627     | 
|Conductores Mexicanos Eléctricos y de Telecomunicaciones, S.A. de C.V. |  |                 | 18,898    |  |               |    | 42,812    |      |  |    | 34,161    | 
|Telmex do Brasil, Ltda.                                                |  |                 | 18,480    |  |               |    | 7,871     |      |  |    | 11,096    | 
|Grupo Telvista, S.A. de C.V.                                           |  |                 | 18,403    |  |               |    | 13,590    |      |  |    | 4,649     | 
|Editorial Contenido S.A.                                               |  |                 | 10,549    |  |               |    |           |      |  |    |           | 
|Radiomovil Dipsa, S.A. de C.V.                                         |  |                 |           |  |               |    | 501,699   |      |  |    | 1,027,048 | 
|Inversora Bursátil, S.A. de C.V.                                       |  |                 |           |  |               |    | 131,813   |      |  |    | 127,472   | 
|Eidon Software, S.A. de C.V.                                           |  |                 |           |  |               |    |           |      |  |    | 103,738   | 
|Otras                                                                  |  |                 | 84,500    |  |               |    | 110,836   |      |  |    | 123,898   | 
|                                                                       |  |                 |           |  |               |    |           |      |  |    |           | 
|                                                                       |  | P.              | 786,186   |  |               | P. | 1,314,356 |      |  | P. | 1,602,128 | 
|                                                                       |  |                 |           |  |               |    |           |      |  |    |           | 
|Short-term debt:                                                       |  |                 |           |  |               |    |           |      |  |    |           | 
|América Móvil                                                          |  |                 |           |  |               | P. | 6,178,550 |      |  |    |           | 
|Long-term debt:                                                        |  |                 |           |  |               |    |           |      |  |    |           | 
|América Móvil                                                          |  | P.              | 9,870,000 |  |               |    |           |      |  |    |           | 





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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|15. | Related Parties (continued)
|--- | ---------------------------



b) For the years ended December 31, 2011 and 2010, the Company had the following
transactions with related parties:



|                                                                                                             |  |      |           |  |      |    |           | 
|------------------------------------------------------------------------------------------------------------ |  | ---- | --------- |  | ---- | -- | --------- | 
|                                                                                                             |  | 2011 |           |  | 2010 |   
|Investment and expenses:                                                                                     |  |      |           |  |      |    |           | 
|Construction services, purchase of materials, inventories and fixed assets (1)                               |  | P.   | 5,391,385 |  |      | P. | 2,948,738 | 
|Network maintenance services, insurance premiums, information technology services and others (2)             |  |      | 3,280,089 |  |      |    | 2,877,506 | 
|Calling party pays interconnection fees and other telecommunication services (3)                             |  |      | 3,479,511 |  |      |    | 7,069,638 | 
|Cost of termination of international calls (6)                                                               |  |      | 765,562   |  |      |    | 730,292   | 
|                                                                                                             |  |     
|Revenues:                                                                                                    |  |      |           |  |      |    |           | 
|Billing and collection services, access to the telephone directory customer data base and other services (4) |  |      | 1,727,135 |  |      |    | 1,830,032 | 
|Rental of private circuits and other telecommunications services (5)                                         |  |      | 4,854,849 |  |      |    | 4,866,957 | 
|Revenues from termination of international calls (6)                                                         |  |      | 546,279   |  |      |    | 709,844   | 

(1) Includes P.5,171,398 in 2011 (P.2,720,123 in 2010) for network construction services and purchase of
construction materials from subsidiaries of Grupo Carso, S.A.B. de C.V. (Carso Group), which is an entity under common control with América Móvil. Also includes P.97,204 in 2010 for the purchase of equipment for broadband platform
services from 2Wire.

(2) Includes P.708,088 in 2011 (P.343,810 in 2010) for network maintenance services from subsidiaries of
Carso Group; P.584,254 in 2011 (P.632,059 in 2010) for information technology services received from affiliates; P.327,674 in 2011 (P.327,674 in 2010) for the production and distribution of white pages telephone directories and advertising in the
yellow pages with subsidiaries of América Móvil; P.605,373 in 2011 (P.518,680 in 2010) for insurance premiums with Seguros Inbursa, S.A. (Seguros), which, in turn, places most of this amount in reinsurance with third parties; P.235,934
in 2011 (P.196,417 in 2010) for telemarketing services with Grupo Telvista; and P.159,083 in 2010 for fees paid for administrative and operating services to AT&T Mexico, Inc. (AT&T Mexico) and Carso Global Telecom. Seguros is an entity under
common control with América Móvil; Grupo Telvista is subsidiary of América Móvil; and AT&T Mexico is subsidiary of AT&T, Inc., a non-controlling shareholder of América Móvil.

(3) Includes P.3,478,444 in 2011 (P.7,068,477 in 2010) for interconnection expenses under the Calling Party Pays program for
outgoing calls from fixed line telephones to cellular telephones paid to subsidiaries of América Móvil.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|15. | Related Parties (concluded)
|--- | ---------------------------



(4) Includes P.228,502 in 2011 (P.235,742 in 2010) for billing and collection services
rendered to subsidiaries of Grupo Financiero Inbursa, S.A.B. de C.V. (Inbursa); P.301,440 (P.301,440 in 2010) for the use and updating of the telephone directory customer database, as well as P.296,978 (P.317,945 in 2010) for billing and collection
service, administrative service and others with subsidiaries of América Movil; and P.657,562 (P.562,852 in 2010) for the leasing of buildings and other services rendered to subsidiaries of América Móvil. Inbursa is an entity
under common control with América Móvil.

(5) Includes P.4,211,032 in 2011 (P.3,767,925 in 2010) for revenues
invoiced to a subsidiary of América Móvil for the rental of private circuits and interconnection services.

(6)
Includes costs and revenues with companies of AT&T Inc. and with subsidiaries of América Móvil.

c) An
analysis of employee benefits granted to the Companys key management or directors is as follows:



|                                    |  |      |        |  |      |    |        | 
|----------------------------------- |  | ---- | ------ |  | ---- | -- | ------ | 
|                                    |  | 2011 |        |  | 2010 |   
|Short and long-term direct benefits |  | P.   | 50,619 |  |      | P. | 45,461 | 
|Post-retirement benefits            |  |      | 3,989  |  |      |    | 4,831  | 
|                                    |  |      |        |  |      |    |        | 
|Total                               |  | P.   | 54,608 |  |      | P. | 50,292 | 
|                                    |  |      |        |  |      |    |        | 



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|16. | Equity
|--- | ------

a) At
December 31, 2011, capital stock is represented by 18,030 million shares issued and outstanding with no par value, representing the Companys fixed capital (18,158 million at December 31, 2010 and 18,192 million at
January 1, 2010). All such shares have been fully subscribed and paid and are comprised of the following:



|                                                                                                                                      |  |                 |             |  |               |  |             |      |  |  |             | 
|------------------------------------------------------------------------------------------------------------------------------------- |  | --------------- | ----------- |  | ------------- |  | ----------- | ---- |  |  | ----------- | 
|                                                                                                                                      |  | At December 31, |             |  | At January 1, | 
|                                                                                                                                      |  | 2011            |             |  | 2010          |  |             | 2010 | 
|7,840 million Series AA common shares (7,840 million at December 31. 2010 and 8,115 million at
January 1, 2010)                     |  |                 | P.3,292,741 |  |               |  | P.3,292,741 |      |  |  | P.3,408,245 | 
|366 million Series A common shares (383 million at December 31, 2010 and 395 million at January 1,
2010)                            |  |                 | 176,705     |  |               |  | 184,997     |      |  |  | 190,606     | 
|9,824 millions Series L shares with limited voting rights (9,935 million at December 31, 2010 and 9,682 million
at January 1, 2010) |  |                 | 1,971,849   |  |               |  | 1,989,297   |      |  |  | 1,874,964   | 
|                                                                                                                                      |  |                 |             |  |               |  |             |      |  |  |             | 
|Total                                                                                                                                 |  |                 | P.5,441,295 |  |               |  | P.5,467,035 |      |  |  | P.5,473,815 | 
|                                                                                                                                      |  |                 |             |  |               |  |             |      |  |  |             | 

At December 31, 2011 and 2010 and at January 1, 2010, the historical value of the
Companys capital stock was P.77,843, P.78,398, and P.78,545, respectively.

An analysis of the changes in 2011 and 2010
is as follows:



|                                      |  |                   |       |   |            |    |           |            |  |  |        |   |  |        |         |   |        |  |       |   |  |    |           |  
|------------------------------------- |  | ----------------- | ----- | - | ---------- | -- | --------- | ---------- |  |  | ------ | - |  | ------ | ------- | - | ------ |  | ----- | - |  | -- | --------- | -
|                                      |  | Capital stock
(1) |      
|                                      |  | Series AA       |       |   | Series A |    |           | Series L | 
|                                      |  | Number            |       |   | Amount     |    |           | Number     |  |  | Amount |   |  | Number |         |   | Amount | 
|Balance at January 1, 2010            |  |                   | 8,115 |   |            | P. | 3,408,245 |            |  |  | 395    |   |  | P.     | 190,606 |   |        |  | 9,682 |   |  | P. | 1,874,964 |  
|Cash purchase of Companys own shares |  |                   |       |   |            |    |           |            |  |  |        |   |  |        | (3      | ) |        |  | (34   | ) |  |    | (6,777    | )
|Conversion of shares                  |  |                   | (275  | ) |            |    | (115,504  | )          |  |  | (12    | ) |  |        | (5,606  | ) |        |  | 287   |   |  |    | 121,110   |  
|                                      |  |                   |       |   |            |    |           |            |  |  |        |   |  |        |         |   |        |  |       |   |  |    |           |  
|Balance at December 31, 2010          |  |                   | 7,840 |   |            |    | 3,292,741 |            |  |  | 383    |   |  |        | 184,997 |   |        |  | 9,935 |   |  |    | 1,989,297 |  
|Cash purchase of Companys own shares |  |                   |       |   |            |    |           |            |  |  |        |   |  |        |         |   |        |  | (128  | ) |  |    | (25,740   | )
|Conversion of shares                  |  |                   |       |   |            |    |           |            |  |  | (17    | ) |  |        | (8,292  | ) |        |  | 17    |   |  |    | 8,292     |  
|                                      |  |                   |       |   |            |    |           |            |  |  |        |   |  |        |         |   |        |  |       |   |  |    |           |  
|Balance at December 31, 2011          |  |                   | 7,840 |   |            | P. | 3,292,741 |            |  |  | 366    |   |  | P.     | 176,705 |   |        |  | 9,824 |   |  | P. | 1,971,849 |  
|                                      |  |                   |       |   |            |    |           |            |  |  |        |   |  |        |         |   |        |  |       |   |  |    |           |  



|(1) | Number of shares in millions.
|--- | -----------------------------



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|16. | Equity (continued)
|--- | ------------------



The Companys capital stock must be represented by no less than 20% of Series
AA common shares, which may be subscribed and acquired only by Mexican investors, and at all times must represent at least 51% of the common shares of total capital stock; Series A common shares, which may be freely subscribed, and
must not exceed more than 19.6% of capital stock and no more than 49% of the common shares of total capital stock; both Series AA and A shares combined may not represent more than 51% of capital stock; and Series
L shares, which have limited voting rights and may be freely subscribed, in a percentage when combined with the Series A shares may not exceed 80% of capital stock.

Voting rights

Each ordinary share of the Series AA and
A entitles the holder to one vote at the general shareholders meetings. Each Series L share entitles the holder to one vote at all shareholders meetings in which holders of Series L shares are
authorized to vote. In accordance with the Eighth Clause of the Companys bylaws, holders of Series L shares only have the right to vote to designate two directors on the Board of Directors and their corresponding alternate
directors, and on the following matters:



| |  |  | The transformation of one type of entity to another;
| | - |  | ----------------------------------------------------



| |  |  | Any merger in which TELMEX is not the surviving entity or any merger with an entity whose principal corporate purposes are different from those of
TELMEX (when TELMEX is the surviving entity); and
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Cancellation of the registration of TELMEXs shares in the securities or special sections of the Mexican National Securities Registry and in any
foreign stock exchanges in which they are registered.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

In order for the resolutions adopted in extraordinary
shareholders meetings related to any of the matters on which the Series L shares are entitled to vote to be validated, the approval by a majority vote of the Series AA and Series A shareholders will be
required.

Under Mexican law, the shareholders of any Series of shares are also entitled to vote as one class on any proposal
that could adversely affect the rights of the shareholders of that particular series and the Companys shareholders (including the Series L shareholders), which individually or collectively represent 20% or more of all capital stock
could judicially oppose any shareholders resolution with respect to those resolutions for which such shareholders have the right to vote. The determination of whether a matter requires the vote by the holders of Series L shares
under such basis would initially be made by the board of directors or by any other party that calls a shareholders meeting to decide on the resolution. A negative decision would be subject to judicial challenge by any affected shareholder, and
a court would ultimately determine the necessity for a class vote. There are no other procedures for determining whether a proposal requires a class vote, and Mexican law does not provide extensive guidance on the criteria to be applied in making
such a determination.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|16. | Equity (concluded)
|--- | ------------------



b) In 1994, the Company initiated a program to purchase its own shares. The cost of the
repurchased shares, in the amount that exceeds the portion of capital stock corresponding to the repurchased shares, is charged to retained earnings.

At a regular shareholders meeting held on March 3, 2009, the shareholders approved an increase of P.10,000,000 in the total authorized nominal amount for the repurchase of the Companys
own shares. The remainder of the previously authorized amount was P.340,868, bringing the total maximum amount to be used for this purpose to P.10,340,868.

In 2011, the Company acquired 128.5 million Series L shares for P.1,358,773.

In 2010, the Company acquired 33.9 million Series L shares for P.339,746 and 6,906 Series A shares for P.76.

At December 31, 2011 and 2010 and at January 1, 2010, the Company had 14,202 million (14,160 million Series L
and 42 million Series A shares), 14,074 million (14,032 million Series L y 42 million Series A shares) and 14,040 million (13,998 million Series L and 42 million Series
A shares) held as treasury shares, respectively.

c) In conformity with the Mexican Corporations Act, at least 5%
of net profit of the year must be appropriated to increase the legal reserve. This practice must be continued each year until the legal reserve reaches at least 20% of capital stock.

d) At a regular meeting held on April 28, 2011, the shareholders agreed to declare a cash dividend of P.0.55 per outstanding share,
to be paid in four installments of P.0.1375 each in June, September and December 2011, and in March 2012. In March 2011, the Company paid the fourth installment of P.0.1250 per outstanding share, which was authorized at the regular meeting held on
April 29, 2010.

At a regular meeting held on April 29, 2010, the shareholders agreed to declare a cash dividend of
P.0.50 per outstanding share, to be paid in four installments of P.0.1250 each in June, September and December 2010, and in March 2011. In March 2010, the Company paid the fourth installment of P.0.1150 per outstanding share, which was authorized at
the regular meeting held on April 29, 2009.

The cash dividends paid in 2011 and 2010 was P.9,508,964 and P.8,736,965,
respectively.



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|17. | Income Tax and Flat-Rate Business Tax
|--- | -------------------------------------

a) Through December 31, 2009, the corporate income tax rate was 28%. Under the Mexican Tax Reform Law approved on December 7, 2009, the corporate income tax rate was increased from 28% to 30%
for the period from January 1, 2010 through December 31, 2012, and will be scaled back to 29% in 2013, and to 28% in 2014 and future years.

b) On October 1, 2007, the Flat-Rate Business Tax (FRBT) Law was published and became effective as of January 1, 2008.

The FRBT is computed by applying the applicable rate to income determined on the basis of cash flows, which is determined by deducting authorized deductions from all income collected from those activities
that are subject to the tax. Certain FRBT credits also may be deducted from the FRBT payable. The FRBT rate is 17.5%.

For the
years ended December 31, 2011 and 2010, the Company had no FRBT payable and, based on its tax projections, estimates that it will not be subject to the payment of FRBT in subsequent years.

c) An analysis of the income tax provision is as follows:



|                        |  |      |           |  |      |    |           |  
|----------------------- |  | ---- | --------- |  | ---- | -- | --------- | -
|                        |  | 2011 |           |  | 2010 |   
|Current year income tax |  | P.   | 6,234,836 |  |      | P. | 9,269,487 |  
|Deferred tax            |  |      | 1,098,373 |  |      |    | (944,442  | )
|                        |  |      |           |  |      |    |           |  
|Total                   |  | P.   | 7,333,209 |  |      | P. | 8,325,045 |  
|                        |  |      |           |  |      |    |           |  

A reconciliation of the statutory income tax rate to the effective rate recognized for financial
reporting purposes is as follows:



|                          |  |       |      |   |       |  |      |  
|------------------------- |  | ----- | ---- | - | ----- |  | ---- | -
|                          |  | 2011% |      |   | 2010% | 
|Statutory income tax rate |  |       | 30.0 |   |       |  | 30.0 |  
|Depreciation              |  |       | (0.5 | ) |       |  | (1.1 | )
|Social security benefits  |  |       | 1.9  |   |       |  | 1.6  |  
|Monetary gain             |  |       | 3.1  |   |       |  | 4.2  |  
|Other                     |  |       | (1.1 | ) |       |  | 0.7  |  
|                          |  |       |      |   |       |  |      |  
|Effective income tax rate |  |       | 33.4 |   |       |  | 35.4 |  
|                          |  |       |      |   |       |  |      |  



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TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|17. | Income Tax and Flat-Rate Business Tax (concluded)
|--- | -------------------------------------------------



At December 31, 2011 and 2010 and at January 1, 2010, the Company recognized
deferred income taxes on the following temporary differences:



|                                                    |  |                 |             |   |            |    |             |      |  |    |             |  
|--------------------------------------------------- |  | --------------- | ----------- | - | ---------- | -- | ----------- | ---- |  | -- | ----------- | -
|                                                    |  | At December 31, |             |   | January 1, |   
|                                                    |  | 2011            |             |   | 2010       |    |             | 2010 | 
|Deferred tax assets:                                |  |                 |             |   |            |    |             |      |  |    |             |  
|Allowance for bad debts and slow-moving inventories |  | P.              | 1,369,846   |   |            | P. | 1,233,739   |      |  | P. | 877,847     |  
|Tax loss carryforwards                              |  |                 | 118,490     |   |            |    | 112,731     |      |  |    | 87,365      |  
|Advance billings                                    |  |                 | 573,476     |   |            |    | 379,101     |      |  |    | 460,296     |  
|Accrued liabilities                                 |  |                 | 1,290,664   |   |            |    | 1,201,474   |      |  |    | 1,492,470   |  
|Employee profit sharing                             |  |                 | 475,548     |   |            |    | 560,959     |      |  |    | 621,496     |  
|Derivative financial instruments                    |  |                 | 440,060     |   |            |    | 151,834     |      |  |    |             |  
|                                                    |  |                 |             |   |            |    |             |      |  |    |             |  
|                                                    |  |                 | 4,268,084   |   |            |    | 3,639,838   |      |  |    | 3,539,474   |  
|                                                    |  |                 |             |   |            |    |             |      |  |    |             |  
|                                                    |  |                 |            
|Deferred tax liabilities:                           |  |                 |             |   |            |    |             |      |  |    |             |  
|Fixed assets                                        |  |                 | (12,768,938 | ) |            |    | (13,257,546 | )    |  |    | (14,357,101 | )
|Inventories                                         |  |                 | (21,615     | ) |            |    | (15,174     | )    |  |    | (13,667     | )
|Licenses and trademarks                             |  |                 | (170,382    | ) |            |    | (187,251    | )    |  |    | (69,031     | )
|Employee benefits                                   |  |                 | (6,251,882  | ) |            |    | (4,561,060  | )    |  |    | (4,261,387  | )
|Prepaid expenses                                    |  |                 | (343,614    | ) |            |    | (260,206    | )    |  |    | (325,215    | )
|Unbilled revenues                                   |  |                 | (327,914    | ) |            |    |             |      |  |    |             |  
|Derivative financial instruments                    |  |                 |             |   |            |    |             |      |  |    | (234,170    | )
|                                                    |  |                 |             |   |            |    |             |      |  |    |             |  
|                                                    |  |                 | (19,884,345 | ) |            |    | (18,281,237 | )    |  |    | (19,260,571 | )
|                                                    |  |                 |             |   |            |    |             |      |  |    |             |  
|Deferred tax liability, net                         |  | P.              | (15,616,261 | ) |            | P. | (14,641,399 | )    |  | P. | (15,721,097 | )
|                                                    |  |                 |             |   |            |    |             |      |  |    |             |  

d) Declared dividends exceeding the Net tax profit account (CUFIN) will be subject to income
tax at the corporate tax rate at the date when paid.



F-62



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##### Table of Contents

TELÉFONOS DE MÉXICO, S.A.B. DE C.V. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2011 and 2010

(Thousands of Mexican pesos)



|18. | Segments
|--- | --------

TELMEX operates
primarily in two segments: local and long distance telephone service. The local telephone service segment corresponds principally to the local fixed-line wired service, including interconnection service. The long distance service segment includes
domestic service and the international service. Others segments include the long distance calls made from public and rural telephones, data services and other services. Additional information related to the Companys operation is provided in
Note 1. The following summary shows the most important segment information, which has been prepared on a consistent basis:



|                              |  |                                |        |  |               |    |        |                |  |    |             |  |  |                    |         |   |  |    |         | 
|----------------------------- |  | ------------------------------ | ------ |  | ------------- | -- | ------ | -------------- |  | -- | ----------- |  |  | ------------------ | ------- | - |  | -- | ------- | 
|                              |  | (In millions of Mexican pesos) |       
|                              |  | Local service                  |        |  | Long distance |    |        | Other segments |  |    | Adjustments |  |  | Consolidated total |        
|December 31, 2011:            |  |                                |        |  |               |    |        |                |  |    |             |  |  |                    |         |   |  |    |         | 
|Revenues:                     |  |                                |        |  |               |    |        |                |  |    |             |  |  |                    |         |   |  |    |         | 
|External revenues             |  | P.                             | 56,577 |  |               | P. | 19,611 |                |  | P. | 35,878      |  |  |                    |         |   |  | P. | 112,066 | 
|Intersegment revenues         |  |                                | 11,744 |  |               |    |        |                |  |    | 801         |  |  | P.                 | (12,545 | ) |  |    |         | 
|Depreciation and amortization |  |                                | 9,120  |  |               |    | 1,604  |                |  |    | 6,212       |  |  |                    |         |   |  |    | 16,936  | 
|Operating profit              |  |                                | 12,825 |  |               |    | 1,433  |                |  |    | 12,324      |  |  |                    |         |   |  |    | 26,582  | 
|Segment assets                |  |                                | 66,683 |  |               |    | 11,127 |                |  |    | 54,175      |  |  |                    |         |   |  |    | 131,985 | 
|                              |  |                                |        |  |              
|December 31, 2010:            |  |                                |        |  |               |    |        |                |  |    |             |  |  |                    |         |   |  |    |         | 
|Revenues:                     |  |                                |        |  |               |    |        |                |  |    |             |  |  |                    |         |   |  |    |         | 
|External revenues             |  | P.                             | 60,489 |  |               | P. | 20,056 |                |  | P. | 33,017      |  |  |                    |         |   |  | P. | 113,562 | 
|Intersegment revenues         |  |                                | 11,338 |  |               |    |        |                |  |    | 885         |  |  | P.                 | (12,223 | ) |  |    |         | 
|Depreciation and amortization |  |                                | 9,335  |  |               |    | 1,698  |                |  |    | 6,467       |  |  |                    |         |   |  |    | 17,500  | 
|Operating profit              |  |                                | 13,788 |  |               |    | 1,528  |                |  |    | 12,743      |  |  |                    |         |   |  |    | 28,059  | 
|Segments assets               |  |                                | 65,321 |  |               |    | 10,647 |                |  |    | 40,520      |  |  |                    |         |   |  |    | 116,488 | 

The financing cost, equity interest in net profit of associated companies and the income tax expense are
not allocated to each segment, because they are handled at the corporate level.

Segment assets include plant, property and
equipment (excluding accumulated depreciation), construction in progress and advances to equipment suppliers, and inventories for operation of the telephone plant.



F-63