Document:

<PAGE>

                                                                     EXHIBIT 4.5

                        COMISION FEDERAL DE ELECTRICIDAD

                                                      CONTRACT NUM. PIF-005/2003
                                                         AGREEMENT NO. 2 (TWO)

AMENDING AGREMENT NUMBER 2 (TWO) TO THE FINANCED PUBLIC WORK MIXED CONTRACT
PIF-005/2003 ENTERED INTO BY AND BETWEEN COMISION FEDERAL DE ELECTRICIDAD,
REPRESENTED HEREIN BY EUGENIO LARIS ANALIS, ENGINEER, ACTING AS DIRECTOR -
FINANCED INVESTMENT PROJECTS, ON ONE HAND, AND THE CORPORATION CONSTRUCTORA
INTERNACIONAL DE INFRAESTRUCTURA, S.A. DE C.V., REPRESENTED HEREIN BY LUIS
HORCASITAS MANJARREZ, ENGINEER, ACTING AS THE ATTTORNEY-IN-FACT THEREOF, ON THE
OTHER, HEREINAFTER DENOMINATED "THE COMISION" AND "THE CONTRACTOR",
RESPECTIVELY, IN ACCORDANCE WITH THE FOLLOWING STATEMENTS AND CLAUSES:

                               S T A T E M E N T S

I.-   THE PARTIES state that:

I.1   On March 26, 2003, they celebrated the Financed Public Work Mix Contract
      recorded under No. PIF-005/2003, legal instrument that shall be referred
      hereinafter as the "Contract", awarded to THE CONTRACTOR by means of the
      International Public Bid procedure stipulated in Articles 27, Item I, 28
      and 30 item II, 32, 33 and 45 of the Public Works and Related Services Law
      and which object consists in: the execution of Civil, Electromechanical
      and Associated Works, procurement, engineering, manufacture,
      transportation, assembly, tests and commissioning of two equipped
      turbo-generator Units, with a 375 MW nominal power rating each, for the
      specified design drop and volume of flow detailed in Section 8 of the
      Bidding Conditions, Works which as a whole are called El Cajon
      Hydroelectric Project, which main structures are located in the
      municipalities of Yesca and Santa Maria del Oro, State of Nayarit, United
      Mexican States."

      The works consisting in the Lump-Sum Price Activities are described in
      detail in the Section 4, exhibits OE-3, OE-4, and OE-5 of the Bidding
      Conditions and shall be carried out on a lump-sum price mode basis, while
      the part of the Works corresponding to the Unit Price Activities are
      described in detail in the Section 4, exhibit OE-5A of the Bidding
      Conditions and shall be executed on a unit price basis.

I.2   The Contract Price that THE COMISSION agreed to pay to THE CONTRACTOR,

Translator's Note: At the foot and left margin of this and every sheet
constituting the present instrument several illegible signatures are subscribed.

<PAGE>

                        COMISION FEDERAL DE ELECTRICIDAD

                                                       CONTRACT NO. PIF-005/2003
                                                           AGREEMENT NO. 2 (TWO)

      under Clause 9.1 was arranged as total payment for the performance of the
      Works corresponding to the Lump-Sum Price Activities amounting to US$ 682'
      517, 584.80 (Six hundred eighty two million five hundred seventeen
      thousand five hundred and eighty four dollars 80/100 US Cy) and that
      corresponding to the Unit Price Activities, that THE COMISION shall pay to
      THE CONTRACTOR amounts to US$ 65' 773, 072.59 (Sixty five million seven
      hundred seventy three thousand and seventy two dollars 59/100 US Cy), plus
      the respective value added tax.

I.3   The starting and development of Works according to the Works Execution
      Schedule was duly agreed in Clause 13.1 of the Contract, according to
      which THE CONTRACTOR was obliged to initiate the works on March 26, 2003
      and to complete them by August 31, 2007, being the term for the execution
      of Works 1 620 Days.

I.4   That on July 4, 2003 the Parties celebrated the Amending Agreement No. 1
      to the Contract (hereinafter the Amending Agreement No. 1) in accordance
      with the provisions of articles 59 of the Public Works and Related
      Services Law and 69 and 79 of its Regulations, in order to (i) increase
      the amount of the Contract exclusively on a Unit Price Activities basis
      referred to in clause 9.1 and exclusively derived from diverse additional
      and extraordinary works which were not originally stipulated in the scope
      of the Project or in the original Execution Schedule (hereinafter the
      "Additional Works"); to agree on the Additional Works Execution Schedule;
      iii) to commit to analyze and conciliate a new Execution Schedule and the
      defacing of Critical Events Dates, due to the reasons stipulated therein.

      According to the stipulated in the Clause Third of the Amending Agreement
      No. 1, THE COMISIONN and THE CONTRACTOR agreed to increase the original
      amount of the Unit Price Activities of the Contract by an amount of US$
      5'801, 271.26 (Five million eight hundred one thousand two hundred and
      seventy one dollars 26/100 US Cy), plus Value Added Tax, which represented
      an 8.82% increase (eight point eighty two percent) compared to the one
      originally contracted, remaining thus a total accumulated to the amount of
      the Contract based on Unit Prices of US$ 71' 574, 343.85 (Seventy one
      million five hundred and seventy four thousand three hundred and forty
      three dollars 85/100 US Cy), plus the respective Value Added Tax according
      to the Additional Works budget.

I.5   The Contract and the present Agreement are ruled by the Public Works and
Related Services Law, its Regulations and other federal laws that may be
applicable in accordance with Clause 31.1 of the Contract.
<PAGE>

                        COMISION FEDERAL DE ELECTRICIDAD

                                                       CONTRACT NO. PIF-005/2003
                                                         AGREEMENT NO. 2 (TWO)

I.6   In agreement with the provisions of articles 52 and 59 of the Public Works
      and Related Services Law and 69 and 79 of its Regulations, it is herein
      stipulated that the Entities may, within its authorized Investment
      Schedule they are in charge of and due to grounded and explicit reasons,
      amend the mixed public works contracts in the part corresponding to unit
      prices by means of agreements, provided that these, considered either
      jointly or severally, neither go beyond the twenty five percent of the
      amount or term agreed under the Contract nor imply material variations to
      the original project or perform them in order to evade, in any way, the
      compliance with the Law or the Treaties.

II.-  THE COMISION states that:

      It determined the need to amend the Contract, therefore, the celebration
      of this amending agreement is required (hereinafter the "Agreement") in
      view of the following:

II.1  At the beginning of El Cajon Hydroelectric Project and since THE COMISION
      did not have all the areas available at the Site to be make them available
      to THE CONTRACTOR as stipulated in the Bidding Conditions, THE COMISION
      ordered THE CONTRACTOR to carry out several Additional Works which were
      not contemplated in the Contract, as well as to decrease the work of the
      original scope of the Contract.

      In view of the previously stipulated, THE CONTRACTOR was forced to use
      economic, material and human additional resources which were considered
      neither in the scope of its Proposal nor in the original Execution
      Schedule.

II.2  It has determined the need to acknowledge THE CONTRACTOR affectations to
      the original Execution Schedule as a consequence of the delayed delivery
      and conditions other than those stipulated in the Bidding Conditions, the
      entrance and exit gates of diversion tunnels, the access road to Site,
      modification to the length of diversion tunnels and the reduction to the
      volume of the upstream water cofferdam, with all their consequences and
      costs, hereinafter the "Additional Costs".

II.3  By means of official documents No. HMM/7A/626 and DPIF/289/2003 dated June
      11 and 18, 2003, respectively, it acknowledged a general delay of 28 Days
      in relation to the whole activities of the contractual construction
      schedule and particularly with regard to the starting of the entrance and
      exit gates of diversion tunnels (as defined in the item 8.2.2.1 of Section
      8 of Bidding Conditions, Technical
<PAGE>

                        COMISION FEDERAL DE ELECTRICIDAD

                                                       CONTRACT NO. PIF-005/2003
                                                          AGREEMENT NO. 2 (TWO)

      Information of the Project), acknowledging 45 Days additional to those
      previously stated.

      Based on the previously stipulated, the new Starting Date of the Contract,
      under the provisions of Clause 13.1 was stipulated in the Amending
      Agreement No. 1, in its Clause Sixth, as April 24, 2003, and consequently,
      the terms stated in Clause 26.1 item p) of the Contract shall be extended
      for the time that the original Starting Date of Contract was extended.

II.4  On the other hand, and being the purpose not to modify the Completion Date
      of Project foreseen for August 31, 2007 and the Completion Date for the
      construction of the upstream water cofferdam foreseen for July 1, 2004,
      which would cause the delaying of the commissioning of Units, THE PARTIES,
      by means of the Amending Agreement No. 1, in its Clause Sixth, agreed on
      the legalization of a second amending agreement in order to define the
      technical alternatives, the Additional Works which are necessary and their
      associated costs (hereinafter the "Additional Associated Costs").

II.5  The stipulated up to this point is grounded in the official documents of
      THE COMISION Nos. DPIF/289/2003 and BGD/HMM/7A/803, dated June 18 and July
      28, 2003, respectively.

      In the mentioned official document BGD/HMM/7A/803 dated July 28, 2003, THE
      COMISION requested to THE CONTRACTOR to implement the necessary actions to
      recover the ease or play of the contractual Work schedule, according to
      the mechanisms set forth in this Contract by means of the actions
      described in the mentioned official document including, among others, the
      provision of additional resources for the works of both diversion tunnels,
      as well as works extraordinary and additional to those stipulated in the
      Contract (hereinafter the "Diversion Additional Works").

      For such purposes, THE COMISION has requested THE CONTRACTOR the budgets
      and related programs and schedules in order to generate the respective
      agreements, taking THE COMISION under the Contract, the responsibility for
      the times and Additional Associated Costs that may result from such
      activities, by implementing the mechanisms for their acknowledgement and
      payment under the Contract.

      In order to comply with the requirements of THE COMISION set forth in such
      official documents, the representatives of THE PARTIES have periodically
      met to
<PAGE>

                        COMISION FEDERAL DE ELECTRICIDAD

                                                       CONTRACT NO. PIF-005/2003
                                                          AGREEMENT NO. 2 (TWO)

      analyze, conciliate and modify the times in the execution of the Diversion
      Works and Additional Works, prior to their legalization by means of the
      celebration of the present Agreement. For such purpose THE CONTRACTOR has
      elaborated options to modify the time of execution, recovery of plays and
      additional measures which have been submitted and discussed with THE
      COMISION in several work meetings, that allowed the determination of the
      respective affectations for the completion of Diversion Works and which
      are translated in the present document.

II.6  The present Agreement is celebrated in order to reach and fulfill the
      covenants set forth in the Clause First item (iii) and Sixth of the
      Amending Agreement No. 1 and stated in item 1.4 of the Statements and the
      EXHIBIT 1 of the present Agreement and at the request of THE COMISION to
      THE CONTRACTOR by means of the Official Document No. BGD/HMM/7A/803, dated
      July 28, 2003, to build a platform at a 235.50 msnm height, its access and
      gate fitting to prevent the possible construction of a prediversion tunnel
      at left margin of 8:00 meters of section, in case of contingency, quoting
      for such purposes the cost of its construction. The definite construction
      of this tunnel shall be decided on or before October 15, 2003, according
      to the Official Document No. HMM/7A/968, dated September 12, 2003.
      Likewise, THE COMISION has requested THE CONTRACTOR to foresee the
      construction of the right margin prediversion tunnel in case of
      contingency, budgeting for such purposes the cost of its design and
      construction, where the construction of the access road, ramp and gate
      fitting of such tunnel shall be initiated. The definite construction of
      such tunnel shall be decided at the latest next November 10, 2003.

II.7  It also justifies the celebration of the present Agreement as well as the
      reasons set forth in the precedent statements, the technical opinion
      integrating the present Agreement as EXHIBIT 1.

III.- THE CONTRACTOR states that:

III.1 It is acquainted with the scope of the Amendments subject matter of the
      present Agreement, that it has legal capacity and enough elements to
      comply with them.

III.2 For the elaboration of the Execution Schedule approved in Clause Second of
      the present Agreement, it has considered the geological information of the
      diversion tunnels provided by THE COMISION in the Bidding Conditions,
      based on which it shall apply all its experience, competences, abilities
      and resources to keep, according to the Official Document No. HMM/533
      dated May 16, 2003, the Completion Date of Project foreseen for August 31,
      2007 and the completion date
<PAGE>

                        COMISION FEDERAL DE ELECTRICIDAD

                                                       CONTRACT NO. PIF-005/2003
                                                          AGREEMENT NO. 2 (TWO)

      of the upstream water cofferdam foreseen for July 01, 2004 (hereinafter
      the "Dates") and to prevent thus the delaying of the Units commissioning.

Due to the previously stated, THE PARTIES agree on the celebration of the
present Agreement in accordance with the provisions of articles 59 of the Public
Works and Related Services Law, 69 and 79 of its Regulations and other norms and
legal provisions that may be applicable, for which purpose they grant the
following:

                                  C L A U S E S

FIRST.- THE PARTIES agree that the object of the present Agreement consists of:

      (i)   According to Clause Sixth of the Amending Agreement No. 1, to modify
            the Work Execution Schedule under the terms stipulated in the new
            Execution Schedule accompanying the present as EXHIBIT 5.

      (ii)  To agree on the defacing of the Critical Events Dates 1.1, 1.2, 1.3
            and 1.4 set forth in the Exhibit No. 3 of the Contract, derived from
            the amendments to the contractual conditions which have been in
            force up to date according to the Clause 13.1 of the Contract.

      (iii) To acknowledge and pay, as the case may be, and under the unit price
            mode, the Additional Costs related to the amendment to the original
            Execution Schedule, as a consequence of the delayed delivery and in
            conditions other than those set forth in the Bidding Conditions and
            in the Contract, of the gates of diversion tunnels and the access
            road to Site, due to causes not imputable to THE CONTRACTOR and to
            make and adjustment in the Lump-Sum Price Activities due to the
            modification to the length of diversion tunnels and the reduction of
            the upstream water cofferdam volume.

      (iv)  Approval in case that THE COMISION decides their performance, the
            payment of the Additional Associated Costs are derived from the
            diversion tunnels of left or right margin prediversion.

      (v)   To ratify in agreement with Clause Seventh of the Amending Agreement
            No. 1 that the Critical Event 1.4 of the Exhibit 3 of the Contract
            stopped being a Penalizing Critical Event.

SECOND.- The New Work Execution Schedule added to the EXHIBIT 5 of the present
<PAGE>

                        COMISION FEDERAL DE ELECTRICIDAD

                                                       CONTRACT NO. PIF-005/2003
                                                         AGREEMENT NO. 2 (TWO)

Agreement includes the exhibits OE10, OE10A, OE11 and OE11A (Scheduled
Activities Net and Critical Path, Certificate of Progress and Scheduled and
Monthly Quantified Payments per activities to perform, Monthly Amount Schedule
for the part at Lump-sum Price and Unit Price) and OT-7 (Project General
Program) same that replace EXHIBITS OE10, OE10A, OE11, OE11A and OT-7 of the
Contract.

Taking the Statement II.3 as basis, THE CONTRACTOR shall submit and conciliate
with THE COMISSION within a 60 Day period from the execution of this Agreement,
a schedule supplementary to the New Execution Schedule and critical path
itemizing the indicated in clause 17.1 of the Contract.

If THE COMMISSION notifies THE CONTRACTOR at the latest on October 15, 2003 the
execution of the left margin prediversion, according to the Official Document
No. HMM/7A/968 dated September 12, 2003 and November 10, 2003 the Prediversion
Additional Works shall be performed under EXHIBITS 3 AND 4 of the present
Agreement, respectively, on a unit price basis.

THIRD.- In accordance with the provisions of Statement III.2 of the present
Agreement, only in the assumption that the geological conditions substantially
differ from those provided for the project and prevent the obtainment of the
yielding of the new Execution Schedule and this implies that the fulfillment of
the river upstream water cofferdam is not completed at the latest on July 10,
2004, both Parties, in agreement with the provided in Clause 26.5 of the
Contract, shall analyze, conciliate and legalize a second new Execution
Schedule, including the Exhibit 3 of the Contract, within a thirty (30) Day
period from the date when the completion of the construction of the upstream
water cofferdam should have taken place, for which purpose, the possible
limitations of THE CONTRACTOR financing shall be taken into consideration as
well as the fact that THE COMISION shall absorb, in the event that the provided
in the present clause takes place, the financial costs of an extension to the
Execution Schedule, taking into account the provided in such Clause 26.5 of the
Contract and from the time that the 60 Day period stipulated therein expires and
up to the extension period agreed to the Execution Schedule. Under this
assumption, THE CONTRACTOR shall not be applied the sanctions provided in
Clauses 13.6 and 26.1 of the Contract or in the Public Works and Related
Services Law and its Regulations, during the extension period agreed upon
between THE PARTIES.

FOURTH.- It is THE PARTIES will, according to the provided in clause sixth of
the Amending Agreement No. 1, to modify the Exhibit 3 of the Contract "Critical
Events Dates" according to the following terms:

            1.1   "Starting of excavation of diversion tunnels", which new
                  compliance
<PAGE>
                        COMISION FEDERAL DE ELECTRICIDAD

                                                       CONTRACT NO. PIF-005/2003
                                                          AGREEMENT NO. 2 (TWO)

                  date shall be June 24, 2003.

            1.2   "River diversion"; which new compliance date shall be January
                  25, 2004.

            1.3   "Starting of the construction of the access tunnel to the
                  engine house", which new compliance date shall be November 01,
                  2003.

            1.4   "Completion of upstream water cofferdam", which new compliance
                  date shall be July 10, 2004.

The dates of the rest of the Critical Events remain unmodified, keeping the same
date set forth in the Exhibit 3 of the Contract.

THE PARTIES agree that the new Execution Schedule approved in the Clause Second
of the present Agreement, does not provide the execution of left and right
margin prediversion tunnels. Therefore, in the assumption that one or both
prediversion tunnels are executed and that the diversion of the river actually
takes place as a result of such prediversions, as stipulated in the Clause
Second of the present Agreement, THE PARTIES shall analyze and modify, as
applicable, the Execution Schedule of the Contract.

FIFTH.- The monthly progress of the concepts covered under this Agreement that
may correspond to works to be executed, including the Associated Additional
Costs set forth in the Clause First item (iv) of this Agreement, shall receive
the acknowledgement and provide the same payment terms that those stipulated in
the Contract for the Unit Price Activities, according to Clauses 9.2, 10.1 and
13.4. Upon the completion of each of the Diversion Additional Works as provided
in the present Agreement, THE COMMISON shall acknowledge it independently, as
set forth in the Exhibit 14 of the Contract and the First and Second Memorandum
of Clarifications to the Contract, that is to say, as if it were an event of
acknowledgement of progresses in the construction contained in the economic form
OE-11B.

For all the Additional Costs incurred into by THE CONTRACTOR who shall include
them in the Monthly Progress Report of the month immediately subsequent to that
when such conciliation takes place.

SIXTH.- THE COMISION and THE CONTRACTOR agree on that the amount of the
Additional Diversion Works agreed upon in the Clause First Item (iii) of this
Agreement, in view of the increase or resources and extension of the crossing
tunnel amount to US $ 1,810, 899.51 (One million eight hundred ten thousand
eight hundred and ninety nine dollars 51/00 US Cy.) plus VAT, according to the
budget detailed in the EXHIBIT 2 of the
<PAGE>

                        COMISION FEDERAL DE ELECTRICIDAD

                                                       CONTRACT NO. PIF-005/2003
                                                          AGREEMENT NO. 2 (TWO)

present Agreement, representing an increase of 2.75% (two point seventy five
percent) with respect to the original amount of the Contract price in the part
related to unit prices, remaining thus the total amount of the Contract unit
price of US$ 73, 385, 243.36 (Seventy three million three hundred and eighty
five thousand two hundred and forty three dollars 36/100 US Cy) plus VAT, the
additional resources with respect to labor, machinery and equipment necessary in
the diversion tunnels included in the amount previously mentioned, shall be
approved by THE COMISION prior to their implementation at Site.

In the assumption that THE COMISION decides the execution of the left margin
diversion, the amount of this Additional Diversion Work agreed upon in the
Clause First Item (iv) of this Agreement, the execution of this structure shall
amount to US $ 2, 969, 437.75 (Two million nine hundred sixty nine thousand,
four hundred and thirty seven dollars 75/100 Cy) plus VAT, according to the
budget detailed in the EXHIBIT 3 of this Agreement, representing an increase of
4.51 % (four point fifty one percent) with respect to the original amount of the
Contract price in the part related to unit prices, remaining thus the total
amount of the Contract unit price of US$ 74, 543, 781.60 (Seventy four million
five hundred and forty three thousand seven hundred and eighty one dollars
60/100 US Cy) plus VAT.

If THE COMISION decides not to execute the left margin diversion, it shall pay
for the embedding of such tunnel referred to in the Statement II.6 of the
present Agreement and the Official Document No. HMM/7A/968 dated September 12,
2003, the amount of US $ 338, 578.50 (Three hundred thirty eight thousand, five
hundred and seventy eight dollars 50/100 Cy) plus VAT, according to the budget
detailed in the EXHIBIT 3 of this Agreement, representing an increase of 0.51 %
(zero point fifty one percent) with respect to the original amount of the
Contract price in the part related to unit prices, remaining thus the total
amount of the Contract unit price of US$ 71, 912, 922.35 (Seventy one million
nine hundred twelve thousand nine hundred and twenty two dollars 35/100 US Cy)
plus VAT.

In the assumption that THE COMISION decides to carry out the execution of the
right margin diversion, the amount of this Additional Diversion Work agreed upon
in the Clause First Item (iv) of this Agreement for the execution of this
structure shall amount to US $ 3, 533, 182.44 (Three million five hundred thirty
three thousand, one hundred and eighty two dollars 44/100 Cy) plus VAT,
according to the budget detailed in the EXHIBIT 4 of this Agreement,
representing an increase of 5.37 % (five point thirty seven percent) with
respect to the original amount of the Contract Price in the part related to unit
prices, remaining thus the total amount of the Contract unit price of US$ 75,
107, 526.29 (Seventy five million one hundred seven thousand five hundred and
twenty six dollars 29/100 US Cy) plus VAT.

<PAGE>

                        COMISION FEDERAL DE ELECTRICIDAD

                                                       CONTRACT NO. PIF-005/2003
                                                          AGREEMENT NO. 2 (TWO)

If THE COMISION decides not to execute the right margin diversion, it shall pay
for the construction of the access road, the ramps and the gate fitting of such
tunnel referred to in the Statement II.6 of the present Agreement, the amount of
US $ 1, 662, 411.00 (One million six hundred sixty two thousand, four hundred
and eleven dollars 00/100 Cy) plus VAT, according to the budget detailed in the
EXHIBIT 4 of this Agreement, representing an increase of 2.53 % (two point fifty
three percent) with respect to the original amount of the Contract price in the
part related to unit prices, remaining thus the total amount of the Contract
unit price of US$ 73, 236, 754.85 (Seventy three million two hundred thirty six
thousand seven hundred and fifty four dollars 85/100 US Cy) plus VAT.

SEVENTH.- THE PARTIES agree that the amount of the Performance Bond granted by
THE CONTRACTOR for the equivalent to ten percent (10%) of the investment amount
authorized for the first fiscal year is enough to secure the due, proper and
full compliance by THE CONTRACTOR with all its obligations derived from the
Contract and the present Agreement for the present fiscal year, since the Works
Execution Schedule originally agreed upon has been affected as stipulated in the
present Agreement and up to date for the execution of the diverse Additional
Diversion Works has not been determined yet.

In the assumption that the left or right margin or both margins diversion work
is executed according to the agreed in the Clause Second, paragraphs second and
third of this Agreement, within the ten (10) Days after the date when the
construction of the river upstream water cofferdam has been completed and that
the Associated Additional Costs of the Additional Diversion Works have been
conciliated and acknowledged.

EIGHTH.- The celebration of the present Agreement neither means waiving the
rights acquired by THE CONTRACTOR, derived from the lack of the delivery of the
Site under the terms stipulated in the Bidding Conditions and in the Contract
nor any other situation previous to the execution of the present Agreement.

THE CONTRACTOR acknowledges that only the celebration and under the conditions
stipulated in this Agreement for the Additional Associated Costs set forth in
the exhibits 2, 3, and 4 of the present Agreement, the celebration thereof
satisfies all its rights.

NINTH.-THE PARTIES agree that except as expressly stipulated in the terms of the
present Agreement, each and all other Clauses integrating and constituting the
Contract shall rule it with full force and legal scope.
<PAGE>

                        COMISION FEDERAL DE ELECTRICIDAD

                                                       CONTRACT NO. PIF-005/2003
                                                          AGREEMENT NO. 2 (TWO)

IN WITNESS WHEREOF, THE PARTIES celebrate and grant the present Agreement by
means of their signatories duly authorized in six counterparts, which shall be
equally valid in Mexico City, Federal District, September 10 of the year two
thousand and three.

BY THE COMISION                                     BY THE CONTRACTOR

ILLEGIBLE SIGNATURE                                 ILLEGIBLE SIGNATURE
EUGENIO LARIS ALANIS, ENG.                   LUIS HORCASITAS MANJARREZ, ENG.
DIRECTOR - FINANCED                                 ATTORNEY IN FACT
INVESTMENT PROJECTS

LIST OF EXHIBITS

Exhibit 1.- Technical Opinion.
Exhibit 2.- Increase of Resources and extension of crossing tunnel
Exhibit 3.- Left margin prediversion (List and Schedule).
Exhibit 4.- Right margin prediversion (List and Schedule).
Exhibit 5.- Work Execution Schedule<PAGE>
                                                                     Exhibit 4.6

                                                               EXECUTION VERSION

                           PURCHASE AND SALE AGREEMENT

         This purchase and sale agreement (the "AGREEMENT") is made this 19th
day of December 2003, between Grupo Iusacell Celular, S.A. de C.V., Sistemas
Telefunicos Portatiles Celulares, S.A. de C.V., Telecommunicaciones del Golfo,
S.A. de C.V., Comunicaciones Celulares de Occidente, S.A. de C.V.,
Iusatelecomunicaciones, S.A. de C.V., SOS Telecomunicaciones, S.A. de C.V.,
Portatel del Sureste, S.A. de C.V. and Iusacell PCS, S.A. de C.V. (each a
"SELLER" and collectively, "SELLERS") and MATC Digital, S. de R.L. de C.V.
("BUYER" and together with Sellers, the "PARTIES").

                                   WITNESSETH:

         WHEREAS, Buyer and/or its Affiliates and Sellers and their Affiliates
have previously entered into or are entering into (a) a Purchase and Sale
Agreement dated as of February 23, 2001 (the "2001 PURCHASE AGREEMENT"), (b) an
Amended and Restated Build-to-Suit and Site Development Agreement dated as of
May 16, 2002, which agreement will be amended and restated following the date
hereof (as amended from time to time, the "BTS AGREEMENT"), (c) a Second Amended
and Restated Master Lease Agreement dated as of the date hereof relating to
sites purchased under the 2001 Purchase Agreement and purchased under this
Agreement (as amended from time to time, the "MLA FOR PURCHASED SITES") and (d)
an Amended and Restated Master Lease Agreement dated as of May 16, 2002, which
agreement will be amended and restated following the date hereof, relating to
sites constructed under the BTS Agreement (as amended from the time to time, the
"MLA FOR BTS SITES", and together with the MLA for Purchased Sites, the "MASTER
LEASES"); and

         WHEREAS, the Parties desire, in accordance with and subject to the
terms and conditions of this Agreement: (a) for Sellers to transfer to Buyer,
simultaneously with the execution of this Agreement and subject to the
satisfaction of the conditions set forth herein, thirty-four (34) Sites to be
chosen by Buyer in its sole discretion (the "INITIAL SITES") and for Buyer to
pay Sellers the Purchase Price therefor, (b) for Sellers to transfer to Buyer,
subject to the satisfaction of the conditions set forth herein, an additional
one hundred nine (109) Sites chosen by Buyer in its sole and absolute discretion
(the "ADDITIONAL SITES") and for Buyer to pay Sellers the Purchase Price
therefor, and (c) to amend their agreement under the BTS Agreement and the
Master Leases as more particularly described therein.

         NOW, THEREFORE, in consideration of the mutual promises contained
herein, and for other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the Parties, intending to be
legally bound hereby, agree as follows:

<PAGE>

                                    ARTICLE I
                                   DEFINITIONS

         Section 1.1. As used herein, unless the context otherwise requires, the
terms defined in Appendix I shall have the respective meanings set forth
therein. Terms defined in the singular shall have a comparable meaning when used
in the plural, and vice versa, and the reference to any gender shall be deemed
to include all genders. Unless otherwise defined or the context otherwise
clearly requires, terms for which meanings are provided in this Agreement shall
have such meanings when used in the Exhibits, Schedules and Closing Documents
delivered, executed or required to be executed pursuant hereto. Unless the
context otherwise requires, all references herein to Articles, Sections,
Schedules or Exhibits are references to the Articles and Sections of this
Agreement and the Schedules and Exhibits attached to this Agreement; and the
words "herein", "hereof", "hereunder" and words of like import shall refer to
this Agreement as a whole and not to any particular section or subdivision of
this Agreement.

                                   ARTICLE II
                         AGREEMENT TO SELL AND PURCHASE

         Section 2.1.  Purchase and Sale. Except as otherwise provided herein,
subject to and upon the terms and conditions set forth in this Agreement, at
each Closing:

         (a) Sellers will sell, convey, assign, transfer and deliver to Buyer,
and Buyer will purchase and acquire from Sellers all of Sellers' right, title
and interest in and to the Closing Sites identified for transfer pursuant to the
procedures set forth in SECTION 2.5; and

         (b) Buyer will assume the Assumed Liabilities for each Closing Site,
but shall have no liability with respect to the Excluded Liabilities for such
Closing Site.

         Section 2.2. Excluded Assets. Sellers are not selling or transferring
hereunder (and therefore will be retaining) and Buyer will not be purchasing or
acquiring hereunder, any right, title or interest of Sellers in or to any of the
Excluded Assets.

         Section 2.3. Purchase Price. In consideration for the sale, conveyance,
assignment, transfer and delivery of the Closing Sites, and subject to the
provisions herein, Buyer agrees to pay to Sellers, at each Closing,
consideration equal to (i) two hundred fifty thousand U.S. dollars (US$250,000)
per Initial Site being transferred to Buyer at such Closing, and (ii) two
hundred ten thousand U.S. dollars (US$210,000) per Additional Site transferred
to Buyer at such Closing (collectively, the "PURCHASE PRICE"), in any such case
payable as provided in SECTION 2.6(A).

         Section  2.4. Apportionment of Real Estate Taxes, Rent, Utilities.

         (a) Appropriate prorations shall be made with respect to each Closing
Site as of the close of business on the applicable Closing Date based on the
actual number of days elapsed prior to such Closing Date in the relevant period
covered by such item of income or expense, with respect to rental and lease
payments, utilities, and all other items of income and expense due or payable
under any Land Lease, Tenant Lease or Related Contract related to such Closing
Site, in each case, of a nature ordinarily prorated as of closing in real estate
transactions (and not separately addressed elsewhere in this Agreement),
including all items of income and expense

                                       2
<PAGE>

that are prepaid or payable in arrears, any unbilled costs and fees and related
accounts, notes and other receivables, with Sellers being entitled to all such
income and responsible for all such expenses relating to all periods prior to
such Closing Date (such expenses not being included in Assumed Liabilities) and
Buyer being entitled to all such income and responsible for all such expenses
relating to all periods on or subsequent to such Closing Date. Such prorations
shall be determined by Buyer, and shall be subject to the approval of Sellers
(which shall not be unreasonably withheld, delayed or conditioned), within
ninety (90) days after the applicable Closing Date, and shall be settled in cash
within ten (10) business days thereafter. Such prorations will not be deemed an
adjustment to the Purchase Price. To the extent that any relevant bills or other
documentation necessary to effect such prorations are not available during such
ninety (90)-day period, the Parties shall make such prorations based on
reasonable estimates and shall adjust the relevant prorations as soon as the
relevant bills or other documentation becomes available.

         (b) If Sellers dispute Buyer's determination of prorations, Sellers
shall give Buyer notice of such dispute within such ten (10)-business-day
period, which notice shall specify in reasonable detail the basis for such
dispute as well as Sellers' determination of prorations. If the Parties are
unable to resolve such dispute within thirty (30) days after such notice is
given, such dispute shall be resolved by arbitration as hereinafter provided in
ARTICLE X.

         Section  2.5. Closing Sites.

         (a) The consummation of the transfer and conveyance of Closing Sites
and other transactions contemplated by this Agreement may occur in multiple
Closings (individually, a "CLOSING" and collectively the "CLOSINGS"), and each
Closing shall occur at Buyer's or its attorneys' offices in Mexico City, D.F.,
at such times and on such dates (each, a "CLOSING DATE") as contemplated under
SECTION 2.5 (b), (c), (d) and (e) below. Buyer and Sellers agree to use their
commercially reasonable efforts to close on at least thirty-four (34) Initial
Sites and one hundred nine (109) Additional Sites prior to the Final Closing
Date (as defined below). Notwithstanding anything to the contrary contained
herein, the Parties acknowledge and agree that each Closing shall be subject to
the provisions of ARTICLES VI AND VII of this Agreement and shall take place
after all the conditions set forth in such ARTICLES VI AND VII have been
satisfied or waived with respect to those Sites being transferred at that
particular Closing.

         (b) The initial Closing of Sites (the "INITIAL CLOSING") shall take
place on the date hereof (the "INITIAL CLOSING DATE"), and thereafter each
subsequent Closing of Sites (each a "SUBSEQUENT CLOSING") shall take place
monthly commencing with the calendar month following the Initial Closing as more
particularly described in SECTION 2.5(d) below; provided, however, that in no
event shall Buyer be obligated to purchase any Sites under this Agreement after
September 30, 2004 (the "FINAL CLOSING DATE"). Those sites actually transferred
from Sellers to Buyer at Closing shall be referred to as the "CLOSING SITES."

         (c) Buyer and Seller have agreed on thirty-four (34) Sites for the
Initial Closing, which Sites are listed on Schedule 3. In the event that any of
such Sites listed on Schedule 3 are Hub Sites (as defined below), the Buyer
agrees that the transfer of such Sites shall be subject to the limitations and
conditions on the transfer of Hub Sites set forth in the second proviso of
clause (d) below. The first thirty-four (34) Sites to Close under this Agreement
shall be considered the

                                       3
<PAGE>

"INITIAL CLOSING SITES". The remaining Closing Sites shall be considered
"SUBSEQUENT CLOSING SITES".

         (d) During the term of this Agreement, Buyer shall conduct due
diligence on the Sites in accordance with Article V with a view to selecting
each of the Initial Sites and Additional Sites as quickly as reasonably possible
and prior to the Final Closing Date. On the 1st of each month commencing with
the calendar month following the Initial Closing, based on its then completed
due diligence, Buyer shall provide to Sellers (i) a list ("CLOSING LIST") of at
least twelve (12) Sites ("POTENTIAL SITES") to be considered for purchase at the
next Closing and (ii) a list of documentation and information required to
complete Buyer's due diligence on such Sites. The Potential Sites will be chosen
by Buyer in its sole and absolute discretion from among the Sites listed on
Schedule 1, which Schedule includes all Sites held by any of the Sellers as of
the date hereof; provided that Buyer may not select in the aggregate, including
Sites transferred at the Initial Closing, more than one hundred and forty-three
(143) Sites unless Buyer and Sellers have agreed otherwise; provided, further,
that Buyer may select a Site listed on Schedule 2 (a "HUB SITE") as a Potential
Site if and only if (i) Buyer will not have, and will not permit any other third
parties to have, any rights or access to the interconnection points or switches
located at such Site, (ii) Seller shall at all time retain legal title and
physical, independent and sole access to, and separate and independent utilities
for, such interconnection points and switches and (iii) in the event that any
construction work is necessary to separate the main entrance of such Site from
the access and utilities mentioned in clause (ii) above, Buyer shall perform
such construction work at its sole cost and expense, without interfering with
Seller's access and utilities; and provided, further, that for each Hub Site
over ten (10) on which Buyer is unable to add additional tenants at a
commercially reasonable cost, Buyer's obligation to purchase Additional Sites as
set forth in SECTION 2.5(A) above shall be reduced by that number. Within ten
(10) Business Days following the delivery of the list of Potential Sites,
Sellers shall deliver to Buyer (i) any documentation related to such Potential
Sites reasonably requested by Buyer to complete its due diligence, (ii) a set of
disclosure schedules relating to such Potential Sites and (iii) a list of each
third party contract or governmental permit related to such Potential Site that
are not assignable by its terms without obtaining prior written consent (each a
"NON-ASSIGNABLE CONTRACT" and collectively the "NON-ASSIGNABLE Contracts")
related to such Potential Sites. During the five (5) Business Day period
immediately following Buyer's receipt of all requested documentation from
Sellers, Buyer may withdraw any of the Potential Sites from the Closing List by
delivering written notice (a "WITHDRAWAL NOTICE") to Sellers identifying such
Sites to be withdrawn; provided, however, that Buyer may not reduce the number
of Sites on the Closing List below ten (10) Sites for each Subsequent Closing.
Subject to the satisfaction of the terms and conditions of this Agreement, the
Closing for the Sites listed on the Closing List that are to be transferred
pursuant to this SECTION 2.5 shall occur as soon as reasonably possible
following the final determination of the Closing List but in no event later than
ten (10) Business Days following such final determination. In the event that the
Parties close on less than the ten (10) Sites ("MINIMUM NUMBER OF SITES") at a
Subsequent Closing, the Minimum Number of Sites for the immediately following
Subsequent Closing shall be increased by the difference between the then Minimum
Number of Sites and the actual number of Closing Sites transferred at the
Previous Closing and Buyer shall increase the number of Sites included on the
Closing List accordingly. Subject to satisfaction of the Closing Conditions
listed in ARTICLES VI and VII, Buyer and Sellers agree to use their commercially
reasonable efforts to close on at least the Minimum Number of Sites (as
increased pursuant to this paragraph) at each Subsequent Closing.

                                       4
<PAGE>

         (e) For a period commencing as of the date of the Initial Closing and
ending twelve (12) months following the Final Closing Date ("EXCHANGE PERIOD"),
Buyer may elect, by delivering written notice to Sellers (the "EXCHANGE
NOTICE"), to exchange a Site that was previously purchased by Buyer at a Closing
pursuant to this Agreement (a "PUT TOWER") for a Site that has not been
purchased by Buyer pursuant to this Agreement (an "EXCHANGE TOWER"). Upon
satisfaction of the Closing conditions described in ARTICLES VI AND VII, Buyer
and Sellers shall exchange the Put Tower for the Exchange Tower, in each case
free and clear of all Liens other than Permitted Encumbrances. In accordance
with SECTION 5.2 Buyer and Sellers shall use commercially reasonable efforts to
satisfy the Closing conditions listed in ARTICLES VI AND VII as soon as
practicable following delivery of the Exchange Notice. A Seller will not be in
breach of this Agreement for failure to satisfy a Closing condition with respect
to an Exchange Tower so long as it used commercially reasonable efforts to
satisfy such Closing condition. So long as Buyer delivers a timely Exchange
Notice, Buyer's exchange right with respect to the Sites identified in such
notice shall survive until the Put Towers are exchanged in accordance with this
SECTION 2.5(e).

         Section  2.6. Closing. At each Closing:

         (a) In consideration for the Sites being transferred or sold from
Sellers to Buyer at a Closing, contemporaneously with such sale or transfer,
Buyer shall pay to Sellers the Purchase Price for those Sites being transferred
or sold, payable by wire transfer of immediately available funds to a bank
account designated by Sellers at least three (3) Business Days prior to the
applicable Closing.

         (b) Sellers shall assign, convey and transfer to Buyer all of Sellers'
interests, as described in SECTIONS 2.1(a) AND (b), in and to those Sites being
transferred or sold at such Closing, free and clear of all Liens other than
Permitted Encumbrances.

         (c) Transfer of rights in the Land Leases, Tenant Leases and Related
Contracts, and transfer of the balance of interests described in SECTION 2.1(a)
shall be by (i) an invoice in the form of Exhibit C attached hereto, (ii) with
respect to Leased Sites, an Assignment and Assumption Agreement of Land Leases
in the form of Exhibit D attached hereto (the "LAND LEASE ASSIGNMENT"), (iii)
with respect to Related Contracts, if any, a Related Contracts Assignment
attached hereto as Exhibit E, and (v) with respect to Owned Sites, a ground
lease in the form attached hereto as Exhibit A (or in the case of Owned Sites
that are Hub Sites, Exhibit A-1).

         (d) Sellers shall deliver to Buyer all security deposits held by
Sellers with respect to those Sites being transferred at a Closing, to the
extent applicable.

         (e) Notwithstanding any other provisions of this SECTION 2.6:

                  (i)      Concurrently herewith, the Buyer and each applicable
         Seller, shall execute and deliver (in the case of the Subordination
         Agreement, to the Sellers) the MLA for the Purchased Sites and a
         Subordination Agreement relating to the list of Sites on Schedule 1 in
         each case substantially in the form attached hereto as Exhibits K and
         O; and

                                       5
<PAGE>

                  (ii)     At the Initial Closing and each Subsequent Closing,
         the Buyer and each applicable Seller shall execute and deliver, with
         respect to each Site transferred at each such Closing, a Site Lease
         pursuant to and in the form required under the MLA for Purchased Sites.

         Section 2.7. Cost and Expenses. Sellers shall pay all Mexican excise,
sale, use, value added, registration, stamp, recording, documentary, conveyance,
franchise, transfer, gains and similar taxes and impositions incurred in
connection with the transactions contemplated by this Agreement other than any
income taxes or similar taxes imposed on Buyer. Buyer shall pay the cost of
recording this Agreement and/or the Land Leases or any other Closing Documents
which Buyer elects to record.

         Section 2.8. Consents and Approvals. If Buyer elects by delivery of a
written notice to Sellers given at any time on or prior to Closing to close on a
Site prior to receipt of all applicable Authorizations:

         (a) Notwithstanding anything to the contrary in this Agreement, this
Agreement shall not constitute an agreement to assign or transfer any
Non-Assignable Contract. Any transfer or assignment to Buyer by Sellers of any
interest in Non-Assignable Contract shall be made subject to such Authorization
being obtained.

         (b) Sellers shall, at their expense, use their reasonable best efforts
to obtain all necessary Authorizations (including, after the applicable Closing
Date, if Buyer shall have elected to close prior to obtaining the same) until
such time as all such Authorizations have been obtained, and Sellers will
cooperate with Buyer to provide that from and after the applicable Closing Date
Buyer shall receive the interest of Sellers in the rights and benefits under
(and to the extent permitted by) any Non-Assignable Contract, provided that
Buyer shall undertake to pay or satisfy the corresponding liabilities for the
enjoyment of such benefit as if Buyer were a party to such Non-Assignable
Contract.

         (c) If and when such Authorizations are obtained, the transfer of the
applicable Non-Assignable Contract shall be effected in accordance with the
terms of this Agreement.

         (d) Sellers agree to execute and deliver such agreements and other
instruments as Buyer may reasonably request to effectuate the provisions of this
SECTION 2.8.

                                  ARTICLE III
                    REPRESENTATIONS AND WARRANTIES OF SELLERS

         As a material inducement to Buyer to enter into this Agreement, each of
the Sellers jointly and severally represent and warrant to Buyer as of the date
hereof and, unless otherwise specified in this ARTICLE III, as of each Closing
Date as follows, except as set forth in the Schedules referenced in this ARTICLE
III, which shall be prepared by Sellers at their sole cost and expense at each
Closing in the form and containing such detail as requested by Buyer.

         Section 3.1. Incorporation; Authorization. Each Seller is an entity
duly organized and validly existing under the Laws of the jurisdiction of its
organization with full power and authority to carry on its business (including
operation of the Sites) as it is now being conducted.

                                       6
<PAGE>

Each Seller has the power and authority to execute and deliver this Agreement
and the Closing Documents to which it is a party, to perform fully its
obligations hereunder and thereunder, and to consummate the transactions
contemplated hereby and thereby. The execution and delivery by each Seller of
this Agreement and the Closing Documents, and the consummation of the
transactions contemplated hereby and thereby, have been duly authorized by all
requisite corporate or other action of each Seller. Each Seller (a) has duly
executed and delivered this Agreement and (b) on the applicable Closing Date
will have duly executed and delivered each of the Closing Documents to which it
is a party. Assuming the due execution and delivery of each such agreement by
each party thereto other than Sellers, this Agreement is the legal, valid and
binding obligation of each Seller, and on the applicable Closing Date each of
the Closing Documents to which it is a party will be the legal, valid and
binding obligation of such Seller, in each case, enforceable in accordance with
its respective terms, subject to the effect of Creditor's Rights.

         Section 3.2. No Conflicts. The execution, delivery and performance by
each Seller of this Agreement and each of the Closing Documents to which it is a
party, and the consummation of the transactions contemplated hereby and thereby,
do not and will not (a) violate any provision of the charter, bylaws or any
other organizational documents of such Seller, (b) violate any provision of, or
result in an event of default under, or result in the acceleration of or entitle
any Person to accelerate (whether after the giving of notice or lapse of time or
both) any obligation under, or result in the imposition of any Lien upon any of
the Sites pursuant to any Lien, Contract, concession, order, arbitration award,
judgment or decree to which any Seller is a party or by which any of the Sites
may be bound or (c) subject to such Seller's receipt of Authorizations yet to be
obtained by such Seller and listed on Schedule 3.3, violate or conflict with any
provision of Law or any other restriction of any kind or character to which such
Seller or any of the Sites is subject that, in the case of either of clauses (b)
and (c) above, would, individually or in the aggregate, have a Material Adverse
Effect on such Seller or the Closing Sites. At all times prior to today, the
Closing Sites have been operated in accordance with all applicable Governmental
Approvals except where failure to operate in accordance with all applicable
Governmental Approvals would not have, individually or in the aggregate, a
Material Adverse Effect on any Seller or any Closing Site.

         Section 3.3. Approvals, Other Authorizations, Consents, Reports, Etc.
Schedule 3.3 attached hereto contains a list of all Authorizations, and other
filings, applications or notices required to be made, filed, given or obtained
by Sellers or any of their Affiliates in connection with the consummation of the
transactions contemplated hereby, except for (a) any filing required pursuant to
Antitrust Law and (b) those that become applicable solely as a result of the
specific regulatory status of Buyer.

         Section  3.4. Property; Title to Assets.

         (a) Schedule 1 attached hereto contains a true, accurate and complete
list of all of Seller's Owned Sites and Leased Sites in Mexico.

         (b) Schedule 3.4(b) attached hereto contains a true, accurate and
complete description of all the Owned Land identified as being transferred
pursuant to a ground lease from Sellers to Buyer, including the legal
description thereof and a reference to the public instrument pursuant

                                       7
<PAGE>

to which Sellers acquired their interest in such tracts of land and the
information pertaining to their registration in the Public Registry of Property.
Except as set forth in Schedule 3.4(b), the applicable Seller has good and
defensible title to all the Owned Land and other real property comprising a
portion of the Owned Sites being transferred free of any Liens, encumbrances and
other limitations of domain, except Permitted Encumbrances and Liens on the
Owned Land pursuant to the Existing Mortgages which Liens are listed on Schedule
3.4(b).

         (c) Schedule 3.4(c) contains a true, accurate and complete description
of the Land Leases relating to the Leased Sites identified as being transferred
from Sellers to Buyer including, without limitation, the rent, rent escalators,
security deposits, subleasing restrictions, commencement date, expiration date
and terms of renewal thereof. Each Land Lease and other leases under which
Sellers hold real or personal property constituting a part of such Leased Sites
being transferred has been duly authorized, executed and delivered by the
applicable Seller and, to such Seller's knowledge, by each of the other parties
thereto, and is a legal, valid and binding obligation of such Seller and
enforceable against each party thereto in accordance with its terms. Sellers
enjoy peaceful and undisturbed possession under all such leases, subject to the
terms of each such lease. True, accurate and complete copies of each of such
Land Leases have been provided by Sellers to Buyer (or true, accurate and
complete descriptions thereof have been set forth in Schedule 3.4(c) with
respect to those that are oral). Each such Land Lease is in full force and
effect with no default by the applicable Seller thereunder, and to the best of
such Seller's knowledge there is no default by the applicable lessor thereunder.
Seller has not done or performed, or failed to do or perform any act which would
invalidate or provide grounds for the other party thereto to terminate (with or
without notice, passage of time or both) any of such leases or in any material
respect impair the rights or benefits of, or materially increase the costs to,
such Seller or Buyer under any of such Land Leases. No claim or allegation is
pending or threatened to the effect that a Seller has not so completely done and
performed or failed to do or perform any obligation under any of such Land
Leases.

         (d) Based on the foregoing, Sellers shall remain liable for the
warranty of title (saneamiento para el caso de eviccion) with respect to the
Closing Sites pursuant to article 2120 of the Federal Civil Code and the
applicable provisions of the Civil Codes of the States where the Sites are
located. No filing which names any Seller as debtor or which covers or purports
to cover any of the Closing Sites is on file with the Public Registry of
Property or the Public Registry of Commerce of any state or other jurisdiction
except as noted in Schedule 3.4(d), and Sellers have not signed or agreed to
sign any agreement or other document authorizing any secured party thereunder to
make any such filing. Except as disclosed in Schedule 3.4(d), all of the Towers,
ground radials, guy anchors, buildings, structures, other improvements, if any,
and real property fixtures located on the Land are located entirely on such
Land. Except as disclosed in Schedule 3.4(d), none of the Closing Sites are
land-locked or require any easement from a third party in order to obtain legal
access to such Site. There is no pending or, to Sellers' knowledge, threatened
or contemplated action to take by eminent domain or otherwise to condemn any
material part of the Land or interest therein.

         (e) Except as set forth in Schedule 3.4(e) or as would otherwise not
have a Material Adverse Effect on a Closing Site, the Towers, ground radials,
guy anchors, buildings, structures and other improvements and real property
fixtures and the Equipment and items of personal property located at the Closing
Sites are in a state of good repair and maintenance and sound

                                       8
<PAGE>

operating condition, and free from all defects, normal wear and tear excepted,
have been maintained in a manner consistent with generally accepted standards of
sound engineering practice, and currently permit the Closing Sites to be
operated in all material respects in accordance with the terms and conditions of
all Laws and Authorizations and as previously operated in the past. Except as
set forth on Schedule 3.4(e), the applicable Seller has good and defensible
title to all tangible personal property constituting a portion of the Closing
Sites, free and clear of all Liens, except Permitted Encumbrances and the Liens
granted to the Financing Secured Parties pursuant to the Existing Mortgages
(which Liens (other than Liens on the Telecommunications Equipment and other
Excluded Assets) shall be released at Closing with respect to the Closing
Sites).

         (f) Schedule 3.4(f) contains a true, accurate and complete description
of the Related Contracts relating to the Closing Sites including, without
limitation, the purpose, consideration, commencement date, expiration date,
terms of renewal thereof, any right of termination and any purchase right or
option. Other than the Related Contracts listed on Schedule 3.4(f), (i) none of
the Closing Sites nor Sellers (with respect to any Closing Site) are bound by
any material agreement pursuant to which any Person provides goods or services
to, or leases any portion of, or which is otherwise related to, a Closing Site
other than Land Leases and Tenant Leases and (ii) no third party is in
possession of any portion of the Closing Sites. Sellers have delivered to Buyer
true, complete and accurate copies of the Related Contracts.

         (g) Schedule 3.4(g) contains a true, accurate and complete description
of all Tenant Leases relating to the Closing Sites including, without
limitation, tenant names, rent, rent escalators, security deposits, commencement
date, expiration date, the terms of renewal thereof, any right of termination
accorded to such tenant other than due to the damage, destruction or
condemnation of the affected Closing Site and any purchase right or option. Each
of the Tenant Leases and Related Contracts are in full force and effect with no
default by Sellers or, to the Seller's knowledge, the other Person thereunder.
Each of the Towers at each of the Closing Sites is useable to support the
antenna attachments and lines existing on such Towers or pursuant to the Tenant
Leases. Sellers have delivered true, complete and accurate copies of the Tenant
Leases to Buyer.

         Section 3.5. Taxes, Utilities and Access. Sellers have paid or will, at
or prior to Closing, pay all outstanding obligations for utilities and real
estate taxes any other local taxes or taxes that otherwise relate to the Closing
Sites through and including the Closing Date except for such items as are
covered by the proration of items of income and expense as set forth in SECTION
2.4. The Closing Sites are served by utilities and have means of lawful ingress
and egress sufficient for their current contemplated use.

         Section 3.6. Environmental Matters.

         (a) Sellers have obtained and have made available to Buyer all
Environmental Permits or approvals required for the original construction of the
Closing Sites (and any modifications made to the Closing Sites prior to the date
hereof), as well as all rulings or approvals in connection with a requirement to
obtain an Environmental Assessment with respect to the Closing Sites, where
applicable under any Environmental Law. Sellers have delivered to Buyer any
other Environmental

                                       9
<PAGE>

Permit required under any Environmental Law, except for those Environmental
Permits where failure to obtain or maintain such Environmental Permit could not
reasonably be expected to have a Material Adverse Effect on any Closing Site.

         (b) The operations and properties of the Sellers relating to the
Closing Sites comply with all applicable Environmental Laws and all necessary
Environmental Permits have been obtained and are in effect for the operations of
the Closing Sites and properties constituting a portion of the Closing Sites,
except where such failure to be in full force and effect or to so comply has not
had, and would not have, individually or in the aggregate, a Material Adverse
Effect on any Closing Site; and, to Sellers' knowledge, no circumstances exist
that are reasonably likely to (i) form the basis of an Environmental Action
against the Sellers with respect to the Closing Sites or (ii) cause the Closing
Sites to be subject to any restrictions on ownership, occupancy, use or
transferability under any Environmental Law that would, in the case of either
(i) or (ii) above, be reasonably likely to have a Material Adverse Effect on any
Site.

         Section 3.7. Litigation. Except as set forth on Schedule 3.7, as of the
date hereof there are no Actions pending or, to Sellers' knowledge, threatened
with respect to or involving any of the Closing Sites. There are no orders or
stipulations of or by any Governmental Authority against Sellers with respect to
any of the Closing Sites or otherwise binding on any of the Closing Sites.

         Section 3.8. Labor Obligations. There is not pending, nor to the best
of Sellers' knowledge threatened, any labor dispute, strike or work stoppage
against any of the Sellers which may interfere with the continued operation of
the Closing Sites.

         Section 3.9. Brokers, Finders, Etc. Sellers have neither employed, nor
are subject to any valid claim of, any broker, finder, consultant or other
intermediary in connection with the transactions contemplated by this Agreement
who is or may be entitled to a fee or commission in connection with the
transactions contemplated hereby or thereby.

         Section 3.10. Compliance with Approvals and Law.

         (a) Schedule 3.10(a) attached hereto contains a true, complete and
accurate description of each Authorization required to own, use and operate the
Closing Sites and to conduct the Sellers' business at the Closing Sites, as
currently conducted. Sellers have obtained all Authorizations that are necessary
for the ownership, use or operation of the Closing Sites and/or such conduct of
the Sellers' business at the Closing Sites, except for those which if not
obtained and maintained, would not individually or in the aggregate, have a
Material Adverse Effect on any of the Closing Sites. None of the Authorizations
listed in Schedule 3.10(a) is subject to any restriction or condition that could
limit in any material respect the ownership, use or operations of the Closing
Sites or the conduct of the Sellers' business at the Closing Sites as currently
conducted, except for restrictions and conditions generally applicable to
Governmental Approvals of such type. The Authorizations listed in Schedule
3.10(a) are valid and in good standing, are in full force and effect and are not
impaired in any material respect by any act or omission of Sellers or their
officers, directors, employees or agents, and the ownership, use and operation
of the Closing Sites and such conduct of the Sellers' business thereat are in
accordance in all material respects with the Authorizations. Sellers are not in
material breach or violation of, or in default in the performance, observance or
fulfillment of, any Authorization, and no Event or circumstance

                                       10
<PAGE>

exists or has occurred which constitutes, or but for any requirement of giving
of notice or passage of time or both would constitute, such a material breach,
violation or default, under any Authorization. No such Authorization is the
subject of any pending or, to Sellers' knowledge, threatened challenge or
proceeding to revoke or terminate any such Authorization. Sellers have no reason
to believe that any Governmental Approval will not be renewed in the name of
Sellers (or Buyer, after the Closing) by the granting Governmental Authority in
the ordinary course.

         (b) Except as otherwise specifically set forth in Schedule 3.10(b)
attached hereto, the Closing Sites and the use, enjoyment and operation thereof
and thereat are in compliance with all applicable Laws. Except as otherwise
specifically described in Schedule 3.10(b), Sellers are not in and are not
charged by any Governmental Authority with, and, to Sellers' knowledge, are not
threatened or under investigation by any Governmental Authority with respect to,
any breach or violation of, or default in the performance, observance or
fulfillment of, any applicable Law relating to the ownership and operation of
the Closing Sites or the conduct of Sellers' business thereat. All reports,
forms and statements required to be filed by Sellers with all Governmental
Authorities with respect to the Closing Sites and Sellers' business thereat have
been filed and are true, complete and accurate in all material respects. Except
as otherwise specifically described in Schedule 3.10(b), no Event exists or has
occurred, which constitutes, or but for any requirement of giving of notice or
passage of time or both would constitute, such a breach, violation or default,
under any Governmental Approval or any applicable Law.

         Section 3.11. Insurance. Sellers maintain policies of fire and extended
coverage and casualty, liability and other forms of insurance in such amounts
and against such risks and losses as are set forth in Schedule 3.11 attached
hereto.

         Section 3.12. Bankruptcy. Sellers represent and warrant that as of the
date hereof, none of them has filed, and they do not intend to file, a voluntary
petition seeking liquidation, reorganization, arrangement or readjustment of its
debts, or seeking a declaration of bankruptcy, concurso mercantil or similar
relief.

         Section 3.13. Limitation of Representations and Warranties. EXCEPT FOR
THE REPRESENTATIONS AND WARRANTIES SET FORTH IN THIS ARTICLE III, SELLERS ARE
NOT MAKING ANY OTHER REPRESENTATIONS OR WARRANTIES, WRITTEN OR ORAL, EXPRESS OR
IMPLIED, CONCERNING ANY CLOSING SITE OR THE SELLERS OR GRUPO IUSACELL, S.A. DE
C.V. OR THE BUSINESS, ASSETS OR LIABILITIES OF THE SELLERS OR GRUPO IUSACELL,
S.A. DE C.V.

                                   ARTICLE IV
                     REPRESENTATIONS AND WARRANTIES OF BUYER

         As a material inducement to Sellers to enter into this Agreement, Buyer
represents and warrants to Sellers, as of the date hereof and as of each Closing
Date, as follows:

         Section 4.1. Incorporation, Authorization. Buyer is an entity duly
organized and validly existing under the Laws of the jurisdiction of its
organization with full power and authority to carry on its business as it is now
being conducted. Buyer has the power and authority to execute and deliver this
Agreement and the Closing Documents to which it is a

                                       11
<PAGE>

party, to perform fully its obligations hereunder and thereunder, and to
consummate the transactions contemplated hereby and thereby. The execution and
delivery by Buyer of this Agreement and the Closing Documents, and the
consummation of the transactions contemplated hereby and thereby, have been duly
authorized by all requisite corporate or other action of Buyer. Buyer (a) has
duly executed and delivered this Agreement and (b) on the applicable Closing
Date will have duly executed and delivered each Closing Document. Assuming the
due execution and delivery of each such agreement by each party thereto other
than Buyer, this Agreement is the legal, valid and binding obligation of Buyer,
and on the applicable Closing Date each of the Closing Documents to which it is
party will be the legal, valid and binding obligation of Buyer, in each case,
enforceable against it in accordance with its respective terms, subject to the
effect of Creditors' Rights.

         Section 4.2. No Conflicts. The execution, delivery and performance by
the Buyer of this Agreement and each of the Closing Documents to which it is a
party, and the consummation of the transactions contemplated hereby and thereby,
do not and will not (a) violate any provision of the charter, bylaws, or any
other organizational documents of Buyer, (b) violate or conflict with any
provision of Law or any other restriction of any kind or character to which
Buyer is subject that would, individually or in the aggregate, have a Material
Adverse Effect on Buyer or (c) violate any provision of, or be an Event that is
a violation of, any Contract, to which Buyer is a party that would have a
Material Adverse Effect on Buyer.

         Section 4.3. Litigation. As of the date hereof, there are no Actions
pending or, to Buyer's knowledge threatened that would preclude Buyer's
consummation of the transactions contemplated hereby. There are no orders or
stipulations of or by any Governmental Authority against Buyer that would
preclude Buyer's consummation of the transactions contemplated hereby.

         Section 4.4. Brokers, Finders, Etc. Except as set forth in Schedule
4.4, Buyer has neither employed, nor is subject to any valid claim of, any
broker, finder, consultant or other intermediary in connection with the
transactions contemplated by this Agreement or any of the transactions
contemplated hereby, who is or may be entitled to a fee or commission in
connection with the transactions contemplated hereby or thereby.

         Section 4.5. Approvals, Other Authorizations, Consents, Reports, Etc.
Schedule 4.5 attached hereto contains a list of all Authorizations, and other
filings, applications or notices required to be made, filed, given or obtained
by Buyer or any of its Affiliates in connection with the consummation of the
transactions contemplated hereby, except for (a) any filing required pursuant to
Antitrust Law and (b) those that become applicable solely as a result of the
specific regulatory status of Sellers.

                                    ARTICLE V
                                    COVENANTS

         Section 5.1. Due Diligence. Each Seller jointly and severally covenants
and agrees that during the Closing Period, such Seller shall ensure that Buyer,
its agents, contractors, employees, representatives and designees shall have
full access to all relevant information concerning such Seller's Sites
including, but not limited to, all titles, surveys, Contracts, files,

                                       12
<PAGE>

and other documentation, agreements and other information in the possession or
control of such Seller or Seller's agents reasonably related to the ownership or
operation of such Sites and, upon Buyer's written request, such Seller shall
provide Buyer with copies thereof.

         Section  5.2. Efforts to Close; Cooperation.

         (a) Subject to each Party's compliance with the provisions of the
Foreign Corrupt Practices Act of the United States, to the extent applicable,
Sellers and Buyer each agree to use their commercially reasonable efforts (i) to
use, take, or cause to be taken, all actions and to do, or cause to be done, all
things necessary, proper or advisable to consummate and make effective as
promptly as practicable the transactions contemplated by this Agreement, and to
cooperate with each other in connection with the foregoing, and (ii) to refrain
from taking, or cause to be refrained from taking, any action and to refrain
from doing or causing to be done, anything which could reasonably be expected to
impede or impair the consummation and the making effective as promptly as
practicable of the transactions contemplated by this Agreement. Without limiting
the generality of the foregoing, (A) each Party agrees to use commercially
reasonable efforts (1) to obtain all Authorizations from third parties, (2) to
obtain all Authorizations that are required to be obtained under any Law, (3) to
lift or rescind any judicial order or other order adversely affecting the
ability of the Parties hereto to consummate the transactions contemplated
hereby, (4) to effect all necessary registrations and filings, including, but
not limited to, filings and submissions of information requested or required by
any Governmental Authority and (5) to fulfill all conditions to this Agreement
and (B) Sellers agree to correct any title defects with respect to each
applicable Site, other than Permitted Encumbrances and, subject to SECTION 5.3,
title defects relating to the Existing Mortgages, at or prior to each applicable
Closing. Sellers and Buyer further covenant and agree, with respect to a
threatened or pending preliminary or permanent judicial order or other order,
decree or ruling or statute, rule, regulation or executive order that would
adversely affect the ability of the Parties hereto to consummate the
transactions contemplated hereby, to use their respective commercially
reasonable efforts to prevent the entry, enactment or promulgation thereof, as
the case may be, or, if entered, to obtain its lifting or revocation. In no
event, however, shall Sellers or Buyer be obligated to pay any money to any
Person or to offer or grant other financial or other accommodations to any
Person in connection with any such commercially reasonable efforts (other than
its own reasonable fees and expenses of counsel and advisors) and except as
otherwise provided herein.

         (b) Sellers and Buyer shall keep the other Party apprised of the status
of matters relating to the completion of the transactions contemplated hereby
and work cooperatively in connection with obtaining the requisite approvals.

         (c) Sellers and Buyer shall each give the other prompt written notice
upon Sellers' or Buyer's (as the case may be) becoming aware that (i) any
representation or warranty made by such Party pursuant to this Agreement is no
longer true or (ii) any fire, other casualty or condemnation (actual or
threatened) affecting a Site.

         (d) In addition and without duplication, Sellers and Buyer shall use
their reasonable best efforts to obtain from each Ground Lessor from whom
consent is required a written consent to (i) the applicable Seller's assignment
of such Land Lease to Buyer (ii) the sublease of portions of

                                       13
<PAGE>

the Site by Buyer to third party tenants whose primary business is the provision
of "radio transmission and/or communication services" or terms of similar
meaning reasonably acceptable to Buyer (each, a "GROUND LESSOR CONSENT") without
making any concessions to the Ground Lessor in terms of Ground Rent or revenue
sharing arrangements and (iii) the creation of a pledge by Buyer of its rights
under the Land Lease for the benefit of Buyer's lenders. Sellers shall involve
Buyer in all material aspects of the efforts to obtain any required Ground
Lessor Consent, including providing copies of such Ground Lessor Consents as and
when sent, providing copies of correspondence relating thereto, and at the
request of Buyer, Buyer shall be included in all negotiations with respect
thereto.

         Section 5.3. Release of Sellers' Liens. At each Closing, Sellers shall
cause either to be paid off or released any Liens, other than Permitted
Encumbrances, which encumber Sellers' title to or interest in those Sites being
conveyed to Buyer at such Closing. Buyer and Sellers acknowledge that Sellers
have granted to the Financing Secured Parties certain encumbrances, liens and
security interests in the Sites pursuant to the Existing Mortgages, but Seller
represents that such encumbrances, liens and security interests shall be
released with respect to those assets being conveyed to Buyer pursuant to this
Agreement upon such conveyance. Buyer acknowledges that the Financing Secured
Parties shall continue to have an encumbrance, lien and security interest on
Sellers' assets not being, or not yet, conveyed to Buyer, including, without
limitation, Sellers' transmission Equipment (the "TELECOMMUNICATIONS EQUIPMENT")
and the Excluded Assets. Sellers shall deliver the Subordination Agreement to JP
Morgan Chase Bank (f/k/a The Chase Manhattan Bank) on or before January 31,
2004. Notwithstanding the foregoing, Buyer will not be precluded from delivering
the Subordination Agreement to JPMorgan Chase Bank (f/k/a The Chase Manhattan
Bank) at an earlier date without Sellers' consent.

         Section  5.4. Conduct of Business.

         (a) From the date hereof and until each Closing and except as
contemplated by this Agreement, Sellers (i) shall operate the applicable Sites
only in the ordinary course of business consistent with past practice; and (ii)
shall use commercially reasonable efforts to preserve intact the present
operations of the Sites and to preserve its relationships with licensors,
landlords, tenants, customers and others having material business relationships
with the Sites.

         (b) From the date hereof and except as contemplated by this Agreement
and in connection with the consummation of transactions contemplated hereunder,
Sellers shall not, without the written consent of Buyer, not to be unreasonably
withheld:

                  (i)      sell, dispose of, transfer or encumber any of the
Sites, other than (x) Permitted Encumbrances incurred or entered into in the
ordinary course of business or (y) conveyances that are immaterial with respect
to the affected Site or (z) actions taken by eminent domain.

                  (ii)     enter into, or amend, modify or cancel any Land
Lease, Tenant Lease or Related Contract or any other material agreement or
Contract related to a Site or waive, release or assign any material rights or
claims thereunder;

                                       14
<PAGE>

                  (iii)    make, with respect to the Sites, any loans or
advances to, or investments in, any Person, other than in the ordinary course of
business; or

                  (iv)     agree, whether in writing or otherwise, to take any
of the actions set forth in this SECTION 5.4(b) and not otherwise permitted by
this Agreement.

As reasonably requested from time to time by Buyer, Sellers shall confer with
one or more representatives of Buyer to report material operational matters and
the general status of ongoing operations relating to any of the Sites.

         Section 5.5. Public Announcements. Except as may otherwise be required
by applicable Law or the rules or regulations of any applicable stock exchange,
Sellers and Buyer shall not issue, or permit any agent or Affiliate to issue,
any press releases or otherwise make, or permit any agent or Affiliate to make,
any public statements with respect to this Agreement and the transactions
contemplated hereby without the prior written consent of the other Party hereto.
Where disclosure is required by applicable Law, the issuing Party shall use its
commercially reasonable efforts to consult with the other Party and agree upon
the nature, content and form of such disclosure.

         Section 5.6. Structural Repairs. Further to SECTION 5.1, Buyer may
commission reports with respect to each of the Towers from such structural
engineers as are satisfactory to Buyer, which reports shall be performed at
Buyer's expense unless any such reports disclose that any Tower (i) is not
structurally sound and in good operating condition, (ii) is not in compliance in
all material respects with all Laws and Authorizations, (iii) requires any
structural or other material repairs or (iv) is subject to any other conditions
contrary to the representations and warranties contained herein, in which case,
the cost of reports shall be borne by Sellers.

         Section 5.7. Other Documentation. In addition to any requirements under
ARTICLE III hereof, prior to or in connection with each Closing, Sellers shall,
at their expense, deliver or cause to be delivered to Buyer (a) copies of all
written (and effective) Land Leases, Related Contracts, Tenant Leases and
material Authorizations solely related to the ownership, operation or transfer
of the Sites to be assigned and transferred to Buyer at such Closing or, to the
extent not solely related, appropriate extracts thereof, (b) copies of, or
extracts from, all current files and records of Sellers or any of their
Affiliates solely related to the ownership, occupancy or leasing of the Sites to
be assigned and transferred to Buyer at the Closing or, to the extent not so
solely related, appropriate extracts thereof, (c) all other original documents
pertaining to the operation of the Sites, and (d) a computer diskette containing
each of the Schedules and Exhibits to this Agreement prepared by Sellers
("SELLER DOCUMENTS").

         Section 5.8. Transfer Taxes. Notwithstanding anything to the contrary
in this Agreement, Sellers shall be responsible for the timely payment of all
sales (including, without limitation, bulk sales), use, value added,
documentary, stamp, gross receipts, registration, transfer, conveyance, excise,
recording, license and other similar taxes and fees arising out of or in
connection with or attributable to the transactions effected pursuant to this
Agreement ("TRANSFER TAXES"). The Parties shall cooperate in the preparation,
execution and filing of all returns, questionnaires, applications and other
documents regarding Transfer Taxes.

                                       15
<PAGE>

         Section 5.9. Interim Financial Statements; Liquidity. During the term
of this Agreement, at the request of Buyer, Sellers shall promptly, and in any
event within five (5) Business Days of Buyer's request, meet with Buyer to
discuss and provide customary information regarding the results of operations
and financial condition of the Sellers. Such meeting shall include the chief
financial officer of Grupo Iusacell or a similar officer of Grupo Iusacell with
in depth knowledge of its financial condition.

         Section 5.10. Use of Proceeds. Sellers hereby covenant and agree to use
the net proceeds from each Closing to acquire additional assets which shall
constitute collateral under the Chase Credit Agreement, as contemplated by
SECTION 6.06(i) of the Chase Credit Agreement.

                                   ARTICLE VI
                    CONDITIONS TO BUYER'S OBLIGATION TO CLOSE

Buyer's obligation to consummate the transactions contemplated hereby with
respect to any applicable Closing Site is subject to the satisfaction on or
prior to the each Closing Date (unless otherwise provided below) of each of the
following conditions, any or all of which may be waived in whole or in part by
Buyer:

         Section 6.1. Representations, Warranties and Covenants of Sellers.

         (a) The representations and warranties of Sellers contained in this
Agreement shall be true and correct on and as of the date when made and shall be
deemed to be made again at and as of the date of each Closing with respect to
those Sites being transferred at such Closing, and shall be true and correct at
and as of such time, except for (i) representations and warranties that speak as
of a specific date or time other than the applicable Closing Date (which need
only be true and correct as of such date or time), (ii) any failures of such
representations and warranties to be true and correct which have not had and
would not reasonably be expected to have, individually or in the aggregate, a
Material Adverse Effect on Sellers or any of the Sites; provided, however, that
for the purpose of this clause (ii) representations and warranties and the terms
used therein that are qualified as to materiality (including by reference to
"MATERIAL ADVERSE EFFECT") shall not be deemed to be so qualified.

         (b) The covenants and agreements of Sellers to be performed on or
before each Closing Date in accordance with this Agreement shall have been duly
performed in all material respects.

         (c) Buyer shall have received at each Closing certificates to the
effect set forth in paragraphs (a) and (b) above dated the applicable Closing
Date validly executed on behalf of Sellers in the form of Exhibits F and G
attached hereto.

         Section 6.2. No Orders or Proceedings. No order, decree, bankruptcy
proceeding, concurso mercantil proceeding or judgment of any Governmental
Authority shall be in effect that restrains, materially delays, restructures or
prohibits the transactions contemplated hereby, and no proceeding shall have
been commenced for purposes of obtaining such order.

         Section 6.3. Antitrust Law Filings. At each Closing Date, any filing
required under antitrust law shall have been made and no ruling objecting to or
imposing conditions on the consummation of the transactions contemplated hereby
under Antitrust Law shall have been

                                       16
<PAGE>

issued and no action shall have been taken by Government Antitrust Authority,
materially challenging or seeking to enjoin the consummation of the transactions
contemplated hereby under Antitrust Law. At each Closing Date falling after
February 29, 2004, any approval applicable to the consummation of the
transactions contemplated hereby under Antitrust Law shall have been obtained.

         Section 6.4. Collateral Agreements. Sellers shall have executed and
delivered (i) the MLA for Purchased Sites substantially the form attached hereto
as Exhibit K, (ii) Site Leases in substantially the form attached to the MLA for
Purchased Sites covering each of the Sites being transferred to Buyer at the
Initial Closing and each Subsequent Closing, (iii) Ground Leases in
substantially the form attached hereto as Exhibit A (or, in the case of Owned
Sites that are Hub Sites, Exhibit A-1), covering the Owned Sites being
transferred to Buyer at such Closing, (iv) Land Lease Assignments in
substantially the form attached hereto as Exhibit D covering the Leased Sites
being transferred to Buyer at such Closing and (v) Tenant Lease Assignments in
substantially the form attached hereto as Exhibit E covering the Sites for which
there exists a Tenant Lease.

         Section 6.5. Other Authorizations; Site Criteria. At or prior to each
Closing Date, all Authorizations (other than those relating to Antitrust Law)
necessary to transfer the relevant Closing Site to Buyer at the applicable
Closing shall have been obtained without the imposition, individually or in the
aggregate, of any condition or requirement that has had or reasonably would be
expected to have, individually or in the aggregate, a Material Adverse Effect on
the Sites to be transferred at such Closing.

         Section 6.6. Other Closing Documents. Buyer shall have received all
customary evidence of authority it may reasonably request relating to the
existence of each Seller and the authority of each Seller to enter into and
consummate this Agreement, the Closing Documents and the transactions
contemplated hereby, all in form and substance reasonably satisfactory to Buyer,
including, without limitation, an opinion of Sellers' MEXICAN counsel issued
with respect to each Closing and dated as of each Closing Date, substantially in
the form of Exhibit J hereto.

         Section 6.7. Original Files and Documents. Buyer shall have received
prior to each Closing original or original counterparts of all files and
documentation from Sellers relating to the applicable Sites as well as copies of
all such files in electronic format to the extent such copies exist.

         Section 6.8. Notices. Sellers shall have delivered to Buyer copies of
notices to the other Persons party to the Land Leases, Tenant Leases and Related
Contracts informing them of the within sale contemplated hereunder, directing
that all future amounts payable and notices and correspondence under such
agreements should be sent to Buyer.

         Section 6.9. Release of Liens. All Liens, other than Permitted
Encumbrances, affecting the Closing Sites have been released, including, without
limitation, Liens relating to the Chase Credit Agreement and the Senior Note
Indenture, subject to the rights of The Chase Manhattan Bank (currently known as
JPMorgan Chase Bank) in Sellers' equipment described in paragraph 3 of the
Subordination Agreement.

                                       17
<PAGE>

         Section 6.10. Related Documents. There shall be no default or event of
default under the MLA for Purchased Sites, the MLA for BTS Sites, the Site
Leases related thereto or the BTS Agreement. Sellers shall have fulfilled all
payment obligations due and payable under the Master Leases and the related Site
Leases and, without limiting the foregoing, shall be in compliance with the
terms of that certain letter agreement dated the date hereof regarding the
payment of past due amounts.

         Section 6.11. Ground Leases. Sellers shall have obtained from each
Ground Lessor from whom consent is required, a written consent to (i) the
applicable Seller's assignment of such Land Lease to Buyer, (ii) the sublease of
portions of the Closing Site by Buyer to third party tenants whose primary
business is the provision of "radio transmission and/or communication services"
and (iii) the creation of a pledge by Buyer of its rights under the Land Lease
for the benefit of Buyer's lenders, which pledge shall be subject to the terms
of the Subordination Agreement.

                                  ARTICLE VII
                   CONDITIONS TO SELLERS' OBLIGATION TO CLOSE

         Sellers' obligation to consummate the transactions contemplated hereby
with respect to any applicable Closing is subject to the satisfaction on or
prior to each Closing Date (unless otherwise provided below) of each of the
following conditions, any or all of which may be waived in whole or in part by
Sellers:

         Section  7.1. Representations, Warranties and Covenants of Buyer.

         (a) The representations and warranties of Buyer contained in this
Agreement shall be true and correct on and as of the applicable Closing Date
with the same effect as though such representations and warranties had been made
on and as of such date except for (i) representations and warranties that speak
as of a specific date or time other than each Closing Date (which need only be
true and correct as of such date or time), and (ii) any failures of such
representations and warranties to be true and correct which have not had and
would not reasonably be expected to have, individually or in the aggregate, a
Material Adverse Effect on Buyer; provided, however, that for the purpose of
this clause (ii) representations and warranties that are qualified as to
materiality (including by reference to "Material Adverse Effect") shall not be
deemed to be so qualified.

         (b) The covenants and agreements of Buyer to be performed on or before
each Closing Date in accordance with this Agreement shall have been duly
performed in all material respects.

         (c) Sellers shall have received at each Closing certificates to the
effect set forth in paragraphs (a) and (b) above dated the applicable Closing
Date and validly executed on behalf of Buyer in the form of Exhibits H and I
attached hereto.

         Section 7.2. Antitrust Law Filings. At each Closing Date, any filing
required under antitrust law shall have been made and no ruling objecting to or
imposing conditions on the consummation of the transactions contemplated hereby
under Antitrust Law shall have been issued and no action shall have been taken
by Government Antitrust Authority, materially challenging or seeking to enjoin
the consummation of the transactions contemplated hereby

                                       18
<PAGE>

under Antitrust Law. At each Closing Date falling after February 29, 2004, any
approval applicable to the consummation of the transactions contemplated hereby
under Antitrust Law shall have been obtained.

         Section 7.3. No Order or Proceedings. No order, decree or judgment of
any Governmental Authority shall have been issued based on or arising out of the
conduct, action, inaction, qualifications or status of Buyer or any of its
Affiliates, which would materially and adversely affect the Closing Sites or
render it unlawful as of any Closing Date to effect the transactions
contemplated by this Agreement in accordance with its terms.

         Section 7.4. Collateral Agreements. Buyer shall have executed and
delivered (i) the MLA for Purchased Sites in substantially the form attached
hereto as Exhibit K, (ii) Site Leases in substantially the form attached to the
MLA for Purchased Sites covering each of the Sites being transferred to Buyer at
the Initial Closing and each Subsequent Closing, (iii) Ground Leases in
substantially the form attached hereto as Exhibit A (or, in the case of Owned
Sites that are Hub Sites, Exhibit A-1) covering the Owned Sites being
transferred to Buyer at such Closing, (iv) Land Lease Assignments in
substantially the form attached hereto as Exhibit D covering the Leased Sites
being transferred to Buyer at such Closing and (v) Tenant Lease Assignments in
substantially the form attached hereto as Exhibit E covering the Sites for which
there exists a Tenant Lease.

         Section 7.5. Other Closing Documents. Sellers shall have received all
customary evidence of authority they may reasonably request relating to the
existence of Buyer and the authority of Buyer to enter into and consummate this
Agreement, the Closing Documents to which it is a party and the transactions
contemplated hereby, all in form and substance reasonably satisfactory to
Sellers including, without limitation, an opinion of Buyer's General Counsel
issued with respect to each Closing and dated as of each Closing Date,
substantially in the form of Exhibit N hereto.

         Section 7.6. Subordination. Buyer shall have executed and delivered to
Sellers a Subordination Agreement in the form attached hereto as Exhibit O to be
held by Sellers and shall be delivered by Sellers to their lenders as
contemplated by SECTION 5.3.

                                  ARTICLE VIII
                                   TERMINATION

         Section 8.1. Termination. This Agreement may be terminated at any time
prior to the Closing only pursuant to the following provisions: (a) by mutual
consent of Buyer and Sellers;

         (b) by Buyer or Sellers if any permanent injunction, decree or judgment
of any Governmental Authority preventing the Initial and all Subsequent Closings
shall have become final and nonappealable;

         (c) by Sellers in the event (i) Sellers are not in material breach of
this Agreement and none of their representations or warranties shall have become
and continue to be untrue in any manner that would cause the condition set forth
in SECTION 6.1 not to be satisfied, and (ii) either

                                       19
<PAGE>

(A) the Termination Date has occurred, or (B) Buyer is in material breach of
this Agreement or any of its representations or warranties shall have been or
become and continue to be untrue in any manner that would cause the conditions
set forth in SECTION 7.1 not to be satisfied, and such a breach or untruth
exists and is not capable of being cured by and will prevent or delay the
Initial and all subsequent Closings by or beyond the Termination Date;

         (d) by Buyer in the event (i) Buyer is not in material breach of this
Agreement and none of its representations or warranties shall have become and
continue to be untrue in any manner that would cause the condition set forth in
SECTION 7.1 not to be satisfied, and (ii) either (A) the Termination Date has
occurred, or (B) Sellers are in material breach of this Agreement or any of
Sellers' representations or warranties shall have been or become and continue to
be untrue in any manner that would cause the conditions set forth in SECTION 6.1
not to be satisfied, and such a breach or untruth exists and is not capable of
being cured by and will prevent or delay the Initial and all subsequent Closings
by or beyond the Termination Date;

         (e) by Buyer, upon breach by Seller or an Affiliate of Seller of any of
its relevant obligations under the Master Leases, which breach has not been
remedied within the applicable cure period contained in such Master Lease;

         (f) by Buyer, upon the occurrence of a Change of Control;

         (g) by Buyer or Sellers, upon receipt of an objection ruling applicable
to the consummation of the transactions contemplated hereby under Antitrust Law
or upon any action taken by the Government Antitrust Authority or receipt of
notice from the Government Antitrust Authority, challenging or seeking to enjoin
the consummation of the transactions contemplated hereby, which objection
ruling, action or notice shall not have been withdrawn or terminated after sixty
(60) days and provided that the terminating entity uses its reasonable efforts
to challenge such objection ruling, action or notice; and provided, further,
that reasonable efforts shall not require a party to pay any consideration
(other than customary filing fees and the like) or require a party to divest or
otherwise rearrange the composition of any asset or business or agree to any
condition, restrictions, requirements or other obligations which are or are
reasonably likely to be materially adverse or materially burdensome to it; or

         (h) by Buyer or Sellers following the Final Closing Date.

The right of Buyer or Sellers to terminate this Agreement pursuant to this
SECTION 8.1 shall remain operative and in full force and effect regardless of
any investigation made by or on behalf of any Party, any Person controlling any
such Party or any of their respective representatives whether prior to or after
the execution of this Agreement.

         Section 8.2. Effect of Termination. Except as provided in this Section,
in the event of the termination of this Agreement pursuant to SECTION 8.1, this
Agreement shall forthwith be terminated or rescinded, as applicable, there shall
be no liability on the part of any Party, or any of their respective
stockholders, officers or directors, to the other and all rights and obligations
of any Party shall cease; provided, however, that such termination shall not
relieve any Party from liability for any breach of this Agreement occurring
prior to such termination or for any willful

                                       20
<PAGE>

or intentional misrepresentation or breach of any of its representations and
warranties, covenants or agreements set forth in this Agreement.

                                   ARTICLE IX
                                 INDEMNIFICATION

         Section 9.1. Indemnification by Sellers. From and after the Initial
Closing Date, Sellers shall indemnify, defend, and hold Buyer's Indemnified
Parties harmless from and against any and all Losses incurred or resulting from:

         (a) Subject to SECTION 9.6, any breach of Sellers' representations or
warranties;

         (b) nonfulfillment by any Seller of any of their covenants or
agreements contained herein; or

         (c) Sellers' operation or ownership of the Sites on or prior to the
applicable Closing Date, including any and all Losses pertaining to the Sites
which relate to events occurring on or prior to the applicable Closing Date.

No claim for indemnification, other than with respect to fraud (dolo) or
intentional and willful breach or misrepresentation or as otherwise provided in
SECTION 11.1, may be asserted after the expiration of the applicable Indemnity
Period.

         Section 9.2. Indemnification by Buyer. From and after the Initial
Closing Date, Buyer shall indemnify, defend and hold Sellers harmless from and
against any and all Losses incurred or resulting from:

         (a) Subject to SECTION 9.6, any breach of Buyer's representations or
warranties; or

         (b) nonfulfillment by Buyer of any of its covenants or agreements
contained herein.

No claim for indemnification, other than with respect to fraud (dolo) or
intentional and willful breach or misrepresentation or as otherwise provided in
SECTION 11.1, may be asserted after the expiration of the applicable Indemnity
Period.

         Section 9.3. Notice of Claims.

         In the event Buyer's Indemnified Parties or Sellers (the "INDEMNIFIED
PARTY") become aware of any Event which would entitle such Indemnified Party to
indemnification by the other Party hereunder (the "INDEMNIFYING PARTY"), the
Indemnified Party shall give the Indemnifying Party prompt written notice, with
reasonable detail, of such Event. If any Action is instituted by a third party
("THIRD PARTY CLAIM") with respect to which an Indemnified Party intends to
claim any loss under SECTIONS 9.1 OR 9.2, such Indemnified Party shall promptly
notify the Indemnifying Party of such Action, but the failure to so notify shall
not relieve such Indemnifying Party of its obligations under this ARTICLE IX,
except to the extent such failure to notify prejudices such Indemnifying Party's
ability to defend such action.

                                       21
<PAGE>

         Section 9.4. Defense of Third Party Claims.

         (a) Upon receipt of such notice by the Indemnified Party, the
Indemnifying Party shall have the option of defending against the pending Third
Party Claim resulting therefrom through engagement of legal counsel of its
choice; provided, however, that the Indemnifying Party's choice of legal counsel
must be acceptable to the Indemnified Party in its reasonable discretion. In the
event the Indemnifying Party elects to defend, the Indemnifying Party shall keep
the Indemnified Party fully informed on a timely basis of the status of the
pending Third Party Claim, and the Indemnified Party shall reasonably cooperate
in such defense. If the Indemnifying Party elects to defend, the Indemnifying
Party will not be liable for any legal expenses subsequently incurred by the
Indemnified Party in connection with the defense thereof; provided, however, if
the Indemnified Party reasonably concludes, based on advice from counsel, that
the Indemnifying Party and the Indemnified Party have conflicting interests with
respect to such action, suit, proceeding or claim or the Indemnifying Party
fails to diligently pursue such defense, the reasonable fees and expenses of
counsel to the Indemnified Party solely in connection therewith shall be
considered Losses for purposes of this Agreement.

         (b) In the event that the Indemnifying Party elects to defend and is
unsuccessful in such defense, it shall promptly pay any and all Losses
associated with the pending Third Party Claim being so defended. In the event
the Indemnifying Party elects not to defend and the Indemnified Party defends,
but is unsuccessful, then the Indemnifying Party shall promptly pay any and all
Losses. In the event that the Indemnifying Party elects not to defend and the
Indemnified Party defends successfully, then the Indemnifying Party shall
promptly pay to the Indemnified Party any and all Losses.

         (c) The Indemnified Party may not settle or compromise any claim or
consent to the entry of any judgment with respect to which indemnification is
being sought hereunder without the prior written consent of the Indemnifying
Party, unless such settlement, compromise or consent includes an unconditional
release of the Indemnifying Party from all liability arising out of such claim.

         (d) The Indemnifying Party shall reimburse the Indemnified Party on
demand for any payment made by the Indemnified Party at any time after the
Initial Closing, based on the final judgment of any court of competent
jurisdiction or pursuant to a bona fide compromise or settlement of claims,
demands or actions in respect to any Losses to which the foregoing
indemnification relates.

         Section 9.5. Insurance. In the case any Event shall occur which would
otherwise entitle any party to assert a claim for indemnification hereunder, no
Losses shall be deemed to have been sustained by such party to the extent of any
proceeds received by such party from any insurance policies with respect
thereto.

         Section 9.6. Limitation of Liability.

         Notwithstanding the provisions of SECTIONS 9.1 AND 9.2, after the
Initial Closing the Buyer's Indemnified Parties, on the one hand, and Sellers,
on the other hand, shall be entitled to recover their Losses for a breach of
representation or warranty only in the event that the

                                       22
<PAGE>

aggregate Losses to such Party relating to such breach claimed under SECTIONS
9.1 AND 9.2, as applicable, exceed US$250,000, in which event the Indemnified
Party shall be entitled to recover all such Losses relating to such claim not to
exceed US$31,390,000; provided, however, that the limitations set forth in this
sentence shall not apply to Losses incurred by Buyer pursuant to SECTIONS 3.1,
3.2, the second sentence of SECTION 3.4(b), the last sentence of SECTION 3.4(e),
SECTION 3.5, SECTION 3.9, SECTION 3.12 AND SECTIONS 4.1 AND 4.2, respectively.

         Section 9.7. Exclusive Remedy. Except for fraud, willful or intentional
misrepresentation or willful or intentional breach of warranty, covenant or
agreement, or as otherwise provided in SECTION 11.2, the indemnification
provided in this Article shall be the sole and exclusive post-Closing remedy
available to any party against any other party for any claim under this
Agreement. Notwithstanding anything to the contrary contained in this Agreement,
no party may be granted indemnity under this Agreement if it has already
received indemnity for the same claim under the MLA for Purchased Sites.

                                   ARTICLE X
                             RESOLUTION OF DISPUTES

         Section 10.1. Agreement to Arbitrate. Any and all claims,
counterclaims, demands, causes of action, disputes, controversies, and other
matters in question arising out of or relating to this Agreement, or the alleged
breach hereof, or in any way relating to the subject matter of this Agreement or
the relationship between the Parties created by this Agreement (all of which are
referred to herein as "CLAIMS"), between two or more parties (each a "DISPUTING
PARTY") shall be resolved by binding arbitration, regardless of whether such
Claims (a) allegedly are extra-contractual in nature, (b) sound in contract,
tort, or otherwise, (c) are provided for by statute or otherwise, or (d) seek
damages or any other relief; provided, however, that each Party expressly waives
any right to any form of damages in excess of compensatory damages, and agrees
not to seek such damages in any forum, as a result of any dispute, controversy
or claim arising out of, relating to or in connection with this Agreement,
including, without limitation, any dispute regarding its validity or
termination, or the performance or breach thereof, and each party further agrees
that the arbitrators are divested of, and will not have, jurisdiction or the
authority to award any form of damages in excess of compensatory damages.
Without limiting the authority conferred on the arbitrators by this Agreement
and the ICC Rules, the arbitrators shall have the authority to award specific
performance. No Claim shall be submitted to arbitration until sixty (60) days
have passed (without mutual agreement having been reached) following the first
written notice from a Disputing Party to the other Disputing Parties that sets
forth the subject matter of the Claim and that states that it is being given
pursuant to this SECTION 10.1. Each Disputing Party shall, if requested by
another Disputing Party, select and appoint a senior executive (not concerned
with the day-to-day performance of the appointor's obligations under this
Agreement) to serve on a panel seeking to reach mutual agreement with respect to
the applicable Claim. Each such appointment shall be made by the giving of
notice by the appointor to the other Disputing Parties within ten (10) Business
Days of the request for the appointment. The appointees shall meet and shall
endeavor to reach such mutual agreement as soon as practicable.

                                       23
<PAGE>

         Section 10.2. Appointment of Arbitrators. If no such mutual agreement
has been reached within such sixty (60) day period, then any Disputing Party may
refer the claim to arbitration under the following provisions:

         (a) To refer a claim to arbitration, a Disputing Party must provide
notice to the ICC and the other Disputing Parties stating (i) a general
description of the Claim and (ii) that the Claim is being referred to
arbitration under this ARTICLE X.

         (b) The arbitration panel shall consist of three neutral arbitrators.
Each Disputing Party shall appoint one arbitrator, obtain its appointee's
acceptance of such appointment, and deliver written notification of such
appointment and acceptance to the other Disputing Party within thirty (30) days
after delivery of the notice described in SECTION 10.2(A) hereof. In the event a
Disputing Party fails to appoint an arbitrator or deliver notification of such
appointment to the other Disputing Party within this time period, upon request
of either Disputing Party, such arbitrator shall instead be appointed by the ICC
within thirty (30) days of receiving such request. The two arbitrators appointed
in accordance with the above provisions shall appoint the third arbitrator,
obtain the appointee's acceptance of such appointment and notify the Disputing
Parties in writing of such appointment and acceptance within thirty (30) days of
their appointment. If the first two appointed arbitrators fail to appoint a
third arbitrator or notify the Disputing Parties of that appointment within this
time period, then, upon request of either Disputing Party, the third arbitrator
shall be appointed by the ICC within thirty (30) days of receiving such request.
The third arbitrator shall serve as chairman of the arbitration tribunal. All
arbitrators appointed pursuant to this SECTION 10.2 shall be attorneys licensed
to practice law in Mexico.

         Section 10.3. Authority of the Arbitrators. The validity, construction,
and interpretation of this agreement to arbitrate, and all procedural aspects of
the arbitration conducted pursuant to this agreement to arbitrate, including,
but not limited to, the determination of the issues that are subject to
arbitration (i.e., arbitrability), the scope of the arbitrable issues,
allegations of "fraud in the inducement" to enter into this agreement to
arbitrate, allegations of waiver, delay or other defenses to arbitrability, the
appropriateness of summary judgment and the rules governing the conduct of the
arbitration (including the time for filing an answer, the time for the filing of
counterclaims, the times for amending the pleadings, the specificity of the
pleadings, the extent and scope of discovery, the issuance of subpoenas, the
times for the designation of experts, whether the arbitration is to be stayed
pending resolution of related litigation involving third parties not bound by
this agreement to arbitrate, the receipt of evidence, and the like) shall be
decided by the arbitrators. The arbitrators shall have the authority to assess
the costs and expenses of the arbitration proceeding (including the arbitrators'
fees and expenses) against one or more of the Disputing Parties in whatever
manner or allocation the arbitrators deem appropriate, provided that each
Disputing Party shall bear its own attorneys' fees, and the arbitrators shall
have no authority to award attorneys' fees.

         Section 10.4. Place of Arbitration. The arbitration proceeding shall be
conducted in Mexico City, Mexico.

         Section 10.5. Conduct of the Arbitration. It is the intent of the
Parties that, barring extraordinary circumstances, the arbitration proceedings
shall be concluded within one hundred

                                       24
<PAGE>

eighty (180) days from the date the arbitrators are appointed. The Parties may
agree to extend this time limit or the arbitrators may do so in their discretion
if they determine that the interest of justice so requires. The arbitrators
shall use their best efforts to issue the award or decision (the "AWARD") within
sixty (60) days after closure of the proceedings. Failure to adhere to these
time limits shall not be a basis for challenging the award. The arbitration
proceedings and the Award of the arbitrators shall be in English.
Notwithstanding the foregoing, either Disputing Party may submit testimony or
documentary evidence in the Spanish language, provided that the Disputing Party
submitting such evidence, at its own cost, also furnishes to the other party a
translation into the English language.

         Section 10.6. ICC Rules. The arbitration shall be conducted under the
ICC Rules, except as they may be modified in this ARTICLE X or by agreement of
the Parties.

         Section 10.7. Payment of Award. Each Disputing Party against which the
arbitrators' Award assesses a monetary obligation shall pay that obligation on
or before the 30th day following the Award or such other date as the Award may
provide, which Award shall be payable in cash in dollars unless the Award
specifies a different currency.

         Section 10.8. Finality of the Arbitrators' Award. The arbitrators'
Award shall, as between the Disputing Parties and those in privity with them, be
final and entitled to all of the protections and benefits of a final judgment,
e.g., res judicata (claim preclusion) and collateral estoppel (issue
preclusion), as to all Claims, including compulsory counterclaims, that were or
could have been presented to the arbitrators. The arbitrators' Award shall not
be reviewable by or appealable to any court.

         Section 10.9. Use of the Courts. It is the intent of the Parties that
the arbitration proceeding shall be conducted expeditiously, without initial
recourse to the courts and without interlocutory appeals of the arbitrators'
decisions to the courts. However, by agreeing to arbitration, the Parties do not
intend to deprive any court with jurisdiction of its ability to issue a
preliminary injunction, attachment or other form of provisional remedy in aid of
the arbitration and a request for such provisional remedies by a Disputing Party
to a court shall not be deemed a waiver of the agreement to arbitrate contained
in SECTION 10.1. Any court order compelling arbitration shall require that the
arbitration proceedings take place in Mexico City, Mexico as specified above.
The Disputing Parties may apply to any court having jurisdiction for orders
requiring witnesses to obey subpoenas issued by the arbitrators. Moreover, any
and all of the arbitrators' orders and decisions may be enforced if necessary by
any court having jurisdiction. The arbitrators' Award may be confirmed in, and
judgment upon the Award entered by, any court having jurisdiction.

         Section 10.10. Confidentiality. Except as may be required by applicable
Law or court order, the Disputing Parties shall maintain confidentiality as to
all aspects of the arbitration, including its existence and results, except that
nothing herein shall prevent any Disputing Party from disclosing information
regarding the arbitration for purposes of enforcing the Award or in any court
proceeding involving the Disputing Parties. The Parties further agree to obtain
the arbitrators' agreement to preserve the confidentiality of the arbitration.
However, a violation of this covenant shall not affect the enforceability of
this agreement to arbitrate or of the arbitrators' Award.

                                       25
<PAGE>

         Section 10.11. Arbitration Provision Enforceable. A Disputing Party's
breach of this Agreement shall not affect this agreement to arbitrate. Moreover,
the Parties' obligations under this arbitration provision are enforceable even
after this Agreement has terminated. The invalidity or unenforceability of any
provision of this agreement to arbitrate shall not affect the validity or
enforceability of the Disputing Parties' obligation to submit their Claims to
binding arbitration or the other provisions of this agreement to arbitrate.

                                   ARTICLE XI
                                  MISCELLANEOUS

         Section 11.1. Survival. The representations and warranties of the
Parties contained in or made pursuant to this Agreement shall survive each
Closing and shall remain operative and in full force and effect for a period of
eighteen (18) months after such Closing Date, except that in the case of matters
of a nature referred to in SECTIONS 3.1, 3.2, THE second sentence of SECTION
3.4(b), SECTION 3.4(c), the last sentence of SECTION 3.4(e), 3.5, 3.9, 4.1 AND
4.2 which shall survive and remain operative and in full force and effect for
the applicable statute of limitations, regardless of any investigation or
statement as to the results thereof made by or on behalf of any Party hereto.
The covenants and agreements of the Parties contained in or made pursuant to
this Agreement or any Closing Document shall survive the Final Closing Date
(unless any such covenant or agreement by its express terms in this Agreement
does not so survive) and shall remain operative and in full force and effect for
the statute of limitations applicable to contractual obligations.
Notwithstanding anything herein to the contrary, any representation, warranty,
covenant and agreement which is the subject of a claim which is asserted in
writing prior to the expiration of the applicable Indemnity Period shall survive
with respect to such claim or any dispute with respect thereto until the final
resolution thereof. The parties hereby waive the provisions of any rule or
statute that is inconsistent with the time periods described in this SECTION
12.1, including without limitation article 2149 of the Federal Civil Code and
the applicable provisions of the Civil Codes of the States where the Sites are
located.

         Section 11.2. Specific Performance; No Consequential Damages. Nothing
herein contained shall be construed as prohibiting each party from pursuing an
action for specific performance pursuant to the provisions or Article 1949 of
the Federal Civil Code of the United Mexican States. Notwithstanding anything to
the contrary in this Agreement, none of the Parties shall pursue, and each Party
hereby waives, any punitive, incidental and consequential damages arising out of
this Agreement (including without limitation damages for diminution in value and
loss of anticipated profits), if any such damages are available under applicable
Law.

         Section 11.3. Risk of Loss. The risk of loss or damage prior to each
Closing Date to any of the Sites acquired or otherwise transferred on such
Closing Date shall be upon Sellers.

         Section 11.4. Liabilities. Buyer shall not, in connection with the
purchase and sale of Sites contemplated herein, assume any liabilities or
obligations of Sellers except as expressly set forth herein.

         Section 11.5. Entire Agreement. This Agreement (which includes the
Appendixes, Exhibits and Schedules attached hereto) constitutes the entire
agreement between the Parties and

                                       26
<PAGE>

there are no other understandings, representations or warranties, oral or
written, relating to the subject matter hereof.

         Section 11.6. Amendment. This Agreement may not be changed, modified or
amended, in whole or in part, except in writing, signed by all Parties.

         Section 11.7. Notice. Notices given pursuant to this Agreement shall be
in writing and shall be given by actual delivery or by delivery of the same by a
recognized overnight courier service to the party entitled thereto at the
addresses set forth below or at any such other address as any Party may
designate in writing to any other Party pursuant to the provisions of this
paragraph. Notices shall be deemed to be received on the date of actual receipt,
in the case of personal delivery, or on the date of mailing, in the case of
mailing. Notices shall be served or mailed to the following addresses, subject
to change as provided above:

         If to Sellers:

                  Grupo Iusacell Celular, S.A. de. C.V.
                  Prol. Paseo de la Reforma 1236, 4th Floor
                  Col. Santa Fe, 05348 Mexico, D.F.
                  Attention: Vice President/ Technical Operations
                  Fax No.: (011) (525) 109-5407

         With a copy (which shall not constitute notice) to:

                  Grupo Iusacell Celular, S.A. de. C.V.
                  Prol. Paseo de la Reforma 1236, PH
                  Col. Santa Fe, 05348 Mexico, D.F.
                  Attention:  General Counsel
                  Fax No.: (011) (525) 109-5772

         If to Buyer:

                  American Tower Corporation de Mexico, S. de R.L. de C.V.
                  Ejercito Nacional 904
                  Piso 17
                  Col. Palmas Polanco
                  11560, Mexico, D.F.
                  Attention:  Lawrence Gleason
                  Fax:(525) 240-2006

With a copy (which shall not constitute notice) to:

                  American Tower Corporation
                  116 Huntington Avenue
                  Boston, Massachusetts 02116
                  Attention:  Hal Hess, Esq.
                  Fax No. (617) 375-7575

                                       27
<PAGE>

                  - and -

                  American Tower International
                  Galleria 75 Office Park, Suite 205
                  3200 Cobb Galleria Parkway
                  Atlanta, Georgia 30339
                  Attention:  Dan Brooks
                  Fax No.:   (770) 952-4999

         Section 11.8. Assignment. Sellers hereby covenant not to assign this
Agreement except with the prior written consent of Buyer, which consent shall
not be unreasonably withheld. Buyer may assign this Agreement freely to any bank
or other financial institution that has loaned funds or otherwise extended
credit to Buyer or any of its Affiliates without the written consent of Sellers,
provided such assignment shall not relieve Buyer of its obligations hereunder.

         Section 11.9. Binding Effect. This Agreement and all of its terms and
conditions shall extend to and be binding upon the Parties hereto and upon their
respective heirs, executors, administrators, successors and assigns.

         Section 11.10. Further Assurances. Sellers and Buyer agree to execute
and deliver any further documents or assurances that in Law or otherwise are
necessary, desirable or proper to consummate the transactions contemplated by
this Agreement and carry out the intent and purposes hereof and to vest,
perfect, assign or confirm, of record or otherwise, in Buyer title to the Sites.

         Section 11.11. Governing Law. This Agreement shall be governed by and
construed in accordance with the Laws of Mexico.

         Section 11.12. Headings. The headings and captions in this Agreement
are for convenience only and are not part of this Agreement.

         Section 11.13. Interpretation. Neither this Agreement nor any provision
contained herein shall be interpreted for or against either Party solely because
that Party or that Party's legal representative drafted the provision.

         Section 11.14. Expenses. All costs and expenses incurred by the Parties
in this transaction, including, but not limited to attorneys' fees and the fees
of other third party service providers, shall be paid by the Party incurring
them, except as otherwise expressly provided herein.

         Section 11.15. Counterparts. This Agreement may be executed in one or
more counterparts, each of which shall be deemed an original and all of which
shall constitute the same Agreement.

         Section 11.16. Severability. If any provision of this Agreement is
found by a court of competent jurisdiction to be invalid or unenforceable, then
such provision shall be severed from this Agreement and the remainder will
remain in full force and effect.

                                       28
<PAGE>

         IN WITNESS WHEREOF, the Parties hereto, intending to be legally bound,
have caused this Agreement to be duly executed on the day and year first written
above.

                       GRUPO IUSACELL CELULAR, S.A. de C.V.

                       By__________________________________________________
                            Name:  Jose  Ignacio Morales Elcoro
                            Title:  Attorney in Fact

                       By__________________________________________________
                            Name:  Jorge Narvaez Mazzini
                            Title:  Attorney in Fact

                       SISTEMAS TELEF1/4NICOS PORTATILES CELULARES, S.A. de C.V

                       By__________________________________________________
                            Name:  Jose  Ignacio Morales Elcoro
                            Title:  Attorney-in-Fact

                       By__________________________________________________
                            Name:  Jorge Narvaez Mazzini
                            Title:  Attorney-in-Fact

                       TELECOMMUNICACIONES DEL GOLFO, S.A. de C.V.

                       By__________________________________________________
                            Name:  Jose  Ignacio Morales Elcoro
                            Title:  Attorney-in-Fact

                       By__________________________________________________
                            Name:  Jorge Narvaez Mazzini
                            Title:  Attorney-in-Fact

                                       1
<PAGE>

                       COMUNICACIONES CELULARES DE OCCIDENTE, S.A. de C.V.

                       By__________________________________________________
                            Name:  Jose  Ignacio Morales Elcoro
                            Title:  Attorney-in-Fact

                       By__________________________________________________
                            Name:  Jorge Narvaez Mazzini
                            Title:  Attorney-in-Fact

                       IUSATELECOMUNICACIONES, S.A. de C.V.

                       By__________________________________________________
                            Name:  Jose  Ignacio Morales Elcoro
                            Title:  Attorney-in-Fact

                       By__________________________________________________
                            Name:  Jorge Narvaez Mazzini
                            Title:  Attorney-in-Fact

                       SOS TELECOMUNICACIONES, S.A. de C.V.

                       By__________________________________________________
                            Name:  Jose  Ignacio Morales Elcoro
                            Title:  Attorney-in-Fact

                       By__________________________________________________
                            Name:  Jorge Narvaez Mazzini
                            Title:  Attorney-in-Fact

                                       2
<PAGE>

                       IUSACELL PCS, S.A. de C.V.

                       By
                         ---------------------------------------------------
                            Name:  Jose  Ignacio Morales Elcoro
                            Title:  Attorney-in-Fact

                       By
                         ---------------------------------------------------
                            Name:  Jorge Narvaez Mazzini
                            Title:  Attorney-in-Fact

                       PORTATEL DEL SURESTE, S.A. de C.V.

                       By
                         ---------------------------------------------------
                            Name:  Jose  Ignacio Morales Elcoro
                            Title:  Attorney-in-Fact

                       By
                         ---------------------------------------------------
                            Name:  Jorge Narvaez Mazzini
                            Title:  Attorney-in-Fact

                       AMERICAN TOWER CORPORATION de MEXICO, S. de R.L. de C.V.

                       By
                         ---------------------------------------------------
                            Name: Lawrence Gleason
                            Title:  Attorney-in-Fact

                                       3
<PAGE>

                    INDEX OF APPENDIXES, EXHIBITS & SCHEDULES

                                   APPENDIXES

Appendix I                     Definitions

                                    EXHIBITS

Exhibit A; A-1            Form of Ground Lease

Exhibit B                 Intentionally deleted

Exhibit C                 Form of Invoice

Exhibit D                 Form of Land Lease Assignment

Exhibit E                 Form of Assignment and Assumption of Related Contracts

Exhibit F                 Form of Sellers' Officer's Certificate

Exhibit G                 Form of Sellers' Secretary's Certificate

Exhibit H                 Form of Buyer's Officer's Certificate

Exhibit I                 Form of Buyer's Secretary's Certificate

Exhibit J                 Form of Opinion of Sellers' Counsel

Exhibit K                 Form of MLA for Purchased Sites

Exhibit L                 Intentionally deleted

Exhibit M                 Intentionally deleted

Exhibit N                 Form of Opinion of Buyer's General Counsel

Exhibit O                 Form of Subordination Agreement

                                    SCHEDULES

Schedule 1                List of Sites

Schedule 2                Hub Sites

Schedule 3                Initial Sites

Schedule 3.3              Seller Approvals

Schedule 3.4(b)           Owned Land; Liens

Schedule 3.4(c)           Land Leases

Schedule 3.4(d)           Encumbrances

Schedule 3.4(e)           Required Repairs and Maintenance

Schedule 3.4(f)           Related Contracts

Schedule 3.4(g)           Tenant Leases

Schedule 3.10(a)          Seller Authorizations

Schedule 3.10(b)          Violations

                                       1
<PAGE>

Schedule 3.11                       Sellers' Insurance

Schedule 4.4                        Brokers

Schedule 4.5                        Buyer Authorizations

Schedule 16                         Excluded Assets

                                       2
<PAGE>

                                   APPENDIX I
                                   DEFINITIONS

         "Action" shall mean any action, suit, claim, arbitration, governmental
investigation or other proceeding.

         "Additional Site" shall have the meaning ascribed to such term in the
recitals to this Agreement.

         "Affiliate" (and, with a correlative meaning, "Affiliated") shall mean,
with respect to any Person, any other Person that directly, or indirectly
through one or more intermediaries, controls, is controlled by, or is under
common control with, such first Person. As used in this definition, "control"
(including, with correlative meanings, "controlled by" and "under common control
with") shall mean possession, directly or indirectly, of the power to direct or
cause the direction of management or policies (whether through ownership of
securities or partnership or other ownership interests, by contract or
otherwise). Notwithstanding anything to the contrary contained in this
Agreement, neither (i) Unefon, S.A. de C.V., (ii) TV Azteca S.A. de C.V., (iii)
Movil Access, S.A. de C.V., (iv) Biper, S.A. de C.V. nor (v) Ricardo Salinas
Pliego and other entities controlled by the "Salinas Group" other than Grupo
Iusacell S.A. de C.V. and its subsidiaries shall be considered Affiliates of
Sellers.

         "Agreement" shall mean this Purchase and Sale Agreement.

         "Antitrust Law" shall mean means the Federal Law of Economic
Competition of Mexico (Ley Federal de Competencia Economica), or any other
antitrust, competition or trade regulatory laws of Mexico.

         "Appurtenant Interest" shall mean, with respect to any portion of the
Land, any and all easements, covenants, agreements, rights, privileges,
tenements, hereditaments, rights of way, licenses, interests and appurtenances
of any kind thereunto (if any) now or hereafter owned by the applicable Seller
and belonging or appertaining thereto including, but not limited to any right,
title and interest of the applicable Seller in and to any adjacent vaults,
alleys, strips or gores of land, and an air zoning or development rights
appurtenant to such land and all right, title and interest of the applicable
Seller in and to any land lying in the bed of any street, highway, alley, road
access way, easement or avenue (whether open, closed or proposed) within, in
front of, behind, aside or otherwise adjoining such land or any of it, and all
right, title and interest of the applicable Seller in and to any award made or
to be made as a result or in lieu of condemnation or for damage to the Sites or
any part thereof by reason of casualty.

         "Assumed Liabilities" shall mean all liabilities other than Excluded
Liabilities related to periods ending on or after each Closing Date, related to,
or arising in connection with the operation, ownership, use or occupancy of
Sites transferred to Buyer on each such Closing Date pursuant to this Agreement.
Without limiting the generality of the foregoing, Assumed Liabilities shall
include, without limitation, all liabilities of Sellers or any of its Affiliates
under or related to each Land Lease and Related Contract.

         "Authorizations" shall mean all Governmental Approvals and Private
Approvals.

                                       1
<PAGE>

         "Award" shall have the meaning ascribed to such term in SECTION 10.5 of
this Agreement.

         "BTS Agreement" shall have the meaning ascribed to such term in the
recitals to this Agreement.

         "Business Day" shall mean any day other than a Saturday, Sunday or
holiday of the federal government of the United States of America or the United
Mexican States.

         "Buyer" shall have the meaning ascribed to such term in the preamble to
this Agreement.

         "Buyer's Indemnified Parties" is a collective reference to Buyer, its
Affiliates, partners, employees, officers, directors, agents and
representatives.

         "Change of Control" shall be deemed to have occurred if Ricardo Salinas
Pliego ceases to own, directly or indirectly, securities of each Seller
representing more than 50% of the total voting power represented by such
Seller's then outstanding voting securities.

         "Chase Credit Agreement" shall mean that certain Amended and Restated
Credit Agreement, as amended, dated as of July 25, 1997 and amended and restated
as of March 29, 2001 among Grupo Iusacell, S.A. de C.V. (now Grupo Iusacell
Celular, S.A. de C.V.), as borrower, the Lenders party thereto and JPMorgan
Chase Bank (f/k/a The Chase Manhattan Bank) as lender and as collateral agent
and administrative agent, as amended from time to time.

         "Claims" shall have the meaning ascribed to such term in SECTION 10.1
of this Agreement

         "Closing" and "Closings" shall have the meaning ascribed to such term
in SECTION 2.5(a) of this Agreement.

         "Closing Date" shall have the meaning ascribed to such term in SECTION
2.5(a) of this Agreement.

         "Closing Documents" is a collective reference to the MLA for Purchased
Sites, the public instruments, the Bills of Sale, the Ground Leases, the Land
Lease Assignments, the Related Contract Assignments, the Tenant Lease
Assignments, the Subordination Agreement and the certificates and other
contracts, documents and instruments required to be delivered under ARTICLES VI
AND VII.

         "Closing List" shall have the meaning ascribed to such term in SECTION
2.5(d) of this Agreement.

         "Closing Period" shall mean the period beginning on the date of this
Agreement and ending on the earlier of (i) the Purchase and Sale to Buyer of all
34 Initial Sites and 109 Additional Sites and (ii) the Final Closing Date.

         "Closing Sites" shall have the meaning ascribed to such term in SECTION
2.5(b) of this Agreement.

                                       2
<PAGE>

         "Contract" shall mean any instrument, contract, lease, warranty, permit
or other agreement or arrangement.

         "Creditors' Rights" is a collective reference to the effects of
bankruptcy, insolvency, reorganization, moratorium or other similar Laws
relating to or affecting the rights of creditors generally and the effects of
the application of general principles of equity.

         "dollars" or "$" shall refer to the lawful currency of the United
States of America.

         "Disputing Party" shall have the meaning ascribed to such term in
SECTION 10.1 of this Agreement.

         "Environmental Action" shall mean any administrative, regulatory or
judicial action, suit, demand, demand letter, claim, notice of noncompliance or
violation, investigation, proceeding, consent order or consent agreement based
upon or arising out of any Environmental Law or any Environmental Permit,
including, without limitation (a) any claim by any Governmental Authority for
enforcement, cleanup, removal, response, remedial or other actions or damages
pursuant to any Environmental Law and (b) any claim by any third party seeking
damages, contribution, injunctive relief or any other remedy arising from
alleged injury or threat of injury to health, safety or the environment.

         "Environmental Assessment" shall mean a formal document filed with the
Mexican environmental authorities that contains a comprehensive description of
the possible effects in the ecosystem or ecosystems which may be affected on
account of the activity or work, whichever the case may be, considering the
diversity of elements which conform said ecosystems, as well as the preventive
measures, mitigation and other factors necessary to avoid or reduce to a minimum
the negative effects in the environment, in a form acceptable to the Mexican
environmental authorities.

         "Environmental Laws" means any Mexican federal, state or local Law,
relating to the environment, health or safety, including without limitation, the
Mexican General Law for Ecological Equilibrium and Protection of the Environment
(Ley General del Equilibrio Ecologico y la Proteccion al Ambiente), and rules
and regulations thereto.

         "Environmental Permits" is a collective reference to all permits
required pursuant to Environmental Laws.

         "Equipment" shall mean all physical assets (other than real property
and interests therein), located at the relevant Site or otherwise used or useful
in the use, operation or management of the Sites and includes, without
limitation, the grounding equipment and fencing located at or around such Site,
excluding the Excluded Assets.

         "Event" shall mean the existence or occurrence of any act, action,
activity, circumstance, condition, event, fact, failure to act, omission,
incident or practice, or any set or combination of any of the foregoing.

         "Exchange Notice" shall have the meaning ascribed to such term in
SECTION 2.5(e).

                                       3
<PAGE>

         "Exchange Period" shall have the meaning ascribed to such term in
SECTION 2.5(e).

         "Exchange Tower" has the meaning ascribed to such term in SECTION
2.5(E) of this Agreement.

         "Excluded Assets" shall mean the Telecommunications Equipment,
including Sellers' equipment shelters, generators and air conditioning units,
and the assets, if any, listed in Schedule 16 attached hereto.

         "Excluded Liabilities" means (a) all (i) liabilities of Sellers or any
of their Affiliates to, or related to, their or their employees in their
capacity as such, (ii) liabilities of Sellers or any of their Affiliates
directly or indirectly related to Excluded Assets and (b) any (i) non-income
taxes arising from or attributable to the Sites for any pre-Closing tax period,
and (ii) income taxes of Sellers or any of their Affiliates for any period.

         "Exhibits" means each of the exhibits referenced within this Agreement
and attached hereto, each of which is hereby incorporated herein.

         "Existing Mortgages" shall mean (A) the mortgage granted by means of
notarial deed 5,114, dated December 1, 1997, granted before Mr. Francisco Hugues
Velez, Notary Public Number 212 in the Federal District, registered under
commercial numbers before the Mexican Public Registry of Commerce 129,279;
126,502; 168,528; 177,150; 120,042 and 132,047 executed by and among each of the
companies mentioned therein as mortgagors and the Chase Manhattan Bank
(currently the JP Morgan Chase Bank) as mortgagee, as amended under (i) the
First Amendment to the Mortgage Agreement granted by means of notarial deed
8,824, dated April 15, 1999, granted before Mr. Francisco Hugues Velez, Notary
Public Number 212 in the Federal District, and (ii) the Second Amendment to the
Mortgage Agreement granted by means of notarial deed 3,196, dated March 29,
2001, granted before Mr. Francisco Hugues Velez, Notary Public Number 212 in the
Federal District, and (B) the mortgage granted by means of notarial deed 6,283,
dated April 30, 2002, granted before Mr. Francisco Hugues Velez, Notary Public
Number 212 in the Federal District, registered under commercial numbers before
the Mexican Public Registry of Commerce 298,914 executed by an among Portatel
del Sureste, S.A. de C.V. and Portatel Comercializadora, S.A. de C.V. as
mortgagors and JP Morgan Chase Bank and First Union National Bank as mortgagees.

         "Final Closing Date" shall have the meaning ascribed to such term in
SECTION 2.5(B) of this Agreement.

         "Financing Secured Parties" shall mean, collectively, the following
entities: (i) the JP Morgan Chase Bank ("JP Morgan Chase") as lender and as
collateral agent and administrative agent for the lenders (the "JP Morgan Chase
Lenders") listed in the JP Morgan Chase Credit Agreement, and (ii) The First
Union National Bank as trustee and agent or representative of the holders under
the Senior Note Indenture.

         "Governmental Antitrust Authority" shall mean means the Mexican Federal
Competition Commission (Comision Federal de Competencia) and any similar Mexican
Authority.

                                       4
<PAGE>

         "Governmental Approvals" shall mean all licenses, permits, franchises,
certifications, waivers, variances, registrations, consents, approvals,
qualifications and other authorizations to, from or with any Governmental
Authority.

         "Governmental Authority" shall mean any federal, state or local court,
arbitral tribunal, administrative agency, board, commission or other judicial,
administrative or regulatory body, instrumentality or authority.

         "Ground Lessor" shall mean, as to a Leased Site, the "lessor" or
"landlord" under the related ground lease.

         "Ground Lessor Consent" shall have the meaning ascribed to such term in
SECTION 5.2(d) of this Agreement.

         "Hub Site" shall have the meaning ascribed to such term in SECTION
2.5(d).

         "ICC" means the Court of Arbitration of the International Chamber of
Commerce.

         "ICC Rules" shall mean the Rules of Arbitration of the International
Chamber of Commerce.

         "Indemnified Party" shall have the meaning ascribed to such term in
SECTION 9.3 of this Agreement.

         "Indemnifying Party" shall have the meaning ascribed to such term in
SECTION 9.3 of this Agreement.

         "Indemnity Period" shall mean the applicable period with respect to
which a representation, warranty, covenant or agreement survives the Closing as
provided in SECTION 11.1 of this Agreement.

         "Initial Closing" shall have the meaning ascribed to such term in
SECTION 2.5(b) of this Agreement.

         "Initial Closing Date" shall have the meaning ascribed to such term in
SECTION 2.5(b) of this Agreement.

         "Initial Sites" shall have the meaning ascribed to such term in the
recitals to this Agreement.

         "Invoice" shall mean an Invoice in the form annexed hereto as Exhibit C
executed and delivered by Sellers.

         "Land" is a collective reference to the Leased Land and the Owned Land.

         "Land Lease Assignment" shall mean an executed and acknowledged
Assignment and Assumption of Land Leases in recordable form, which Assignment
and Assumption of Land Leases shall be substantially in the form of Exhibit C
attached hereto

                                       5
<PAGE>

         "Land Leases" shall mean any lease, license, permit or other agreement
described in Schedule 3.4(c) attached hereto or pursuant to which Sellers lease
or utilize any of the Sites.

         "Law" shall mean any domestic federal, state, or local law, statute,
code, ordinance, rule, regulation, order or other requirement of a Governmental
Authority.

         "Leased Land" shall mean the tracts of land on which Towers are
located, which tracts are leased or otherwise occupied or used by Sellers
pursuant to Land Leases, together with its Appurtenant Interest.

         "Leased Sites" shall mean the Towers located on the Leased Land,
together with the Leased Land, Appurtenant Interests, building, structures,
other improvements and facilities (if any) and Equipment located thereon, and
together with the related Land Leases, Tenant Leases, Related Contracts and
Tower Related Assets, in each case, excluding the Excluded Assets.

         "Lien" shall mean any of the following: mortgage; lien (statutory or
other); trust or other security agreement, arrangement or interest;
hypothecation, pledge or other deposit arrangement; assignment; charge; levy;
executory seizure; attachment; garnishment; encumbrance (including any easement,
exception, reservation or limitation, right of way, and the like); conditional
sale, title retention or other similar agreement, arrangement, device or
restriction; preemptive or similar right; any financing lease involving
substantially the same economic effect as any of the foregoing; restriction on
sale, transfer, assignment, disposition or other alienation; or any option,
equity, claim or right of or obligation to, any other Person, of whatever kind
and character.

         "Losses" is a collective reference to any and all losses, costs,
expenses, liabilities, penalties, claims and other damages including, but not
limited to, reasonable attorneys' fees and costs of investigation.

         "Master Leases" shall have the meaning ascribed to such term in the
recitals of this Agreement.

         "Material Adverse Effect" shall mean, (a) with respect to any Person,
such state of facts, events, circumstances, change or effect as has had, or
would reasonably be expected to have, a material adverse effect on the business,
results of operations or financial condition of such entity, or on the ability
of such entity to consummate the transactions contemplated hereby or to perform
in all material respects the obligations under this Agreement or any of the
Closing Documents to which it is or will be a party, and (b) with respect to any
Site, such state of facts, events, circumstances, change or effect as has had,
or would reasonably be expected to have, a material adverse effect on the value
of such Site or the use, operation, ownership or marketing of such Site as
contemplated by Buyer.

         "Mexico" means the United Mexican States.

         "Minimum Number of Sites" shall have the meaning ascribed to such term
in SECTION 2.5(d) of this Agreement.

         "MLA for Purchased Sites" shall have the meaning ascribed to such term
in the recitals to this Agreement.

                                       6
<PAGE>

         "MLA for BTS Sites" shall have the meaning ascribed to such term in the
recitals to this Agreement.

         "Non-Assignable Contract" and "Non-Assignable Contracts" shall have the
meaning ascribed to such term in SECTION 2.5(d) of this Agreement.

         "Owned Land" shall mean the tracts of land on which Towers are located
that are owned by Sellers and described in Schedule 3.4(b).

         "Owned Sites" shall mean the Towers located on the Owned Land, together
with a leasehold interest in the Owned Land and Appurtenant Interests,
buildings, structures, other improvements and facilities (if any) and Equipment
located thereon, and the associated Tenant Leases, Related Contracts and Tower
Related Assets, in each case excluding the Excluded Assets.

         "Parties" is a collective reference to Buyer and Sellers.

         "Permitted Encumbrances" shall mean: (i) encumbrances for taxes,
assessments, or governmental charges or levies that are not yet due and payable;
(ii) easements, rights of way or other encumbrances that are not monetary in
nature and that do not have a Material Adverse Effect on any Site; (iii) the
rights of tenants, as Tenants only, under Tenant Leases disclosed in Schedule
3.4(g); (iv) the Related Contracts disclosed in Schedule 3.4(f), (v)
encumbrances on Owned Land listed in Schedule 3.4(b) and (vi) encumbrances
listed on Schedule 3.4(d); (other than any Existing Mortgages on any assets
being transferred hereunder).

         "Person" shall mean an individual, a corporation, a limited liability
company, a partnership, an association, a trust or any other entity or
organization, including a Governmental Authority.

         "Potential Sites" shall have the meaning ascribed to such term in
SECTION 2.5(d) of this Agreement.

         "Private Approvals" shall mean all licenses, permits, franchises,
certifications, waivers, variances, registrations, consents, releases,
approvals, qualifications, filings, applications, notices and other
authorizations to, from or with any Person other than a Governmental Authority.

         "Public Registry of Commerce" means the office of the public registry
of commerce of the corporate domicile of each Seller, as provided for in the
Commerce Code.

         "Public Registry of Property" shall mean the office of the public
registry of property of each jurisdiction where Sites are located, provided for
in the Civil Codes for the Mexican States.

         "Purchase Price" shall have the meaning ascribed to such term in
SECTION 2.3 of this Agreement.

         "Put Tower" shall have the meaning ascribed to such term in SECTION
2.5(e) of this Agreement.

                                       7
<PAGE>

         "Related Contract" shall mean an agreement, other than a Land Lease or
Tenant Lease, between Sellers or an Affiliate of Sellers, on the one hand, and a
third party not Affiliated with Sellers, on the other hand, pursuant to which a
third party provides goods or services to, or which otherwise relates to, a Site
(e.g., a maintenance agreement).

         "Related Contract Assignment" shall mean an executed Assignment and
Assumption of Related Contracts from Sellers to Buyer in the form of Exhibit E
attached hereto.

         "Seller Documents" shall have the meaning ascribed to such term in
SECTION 5.7 of this Agreement.

         "Sellers" or "Sellers" shall have the meaning ascribed to such term in
the preamble to this Agreement.

         "Senior Note Indenture" means the Indenture, dated as of July 25, 1997,
for 10% Senior Notes due 2004, by and between Grupo Iusacell Celular, S.A. de
C.V., certain subsidiaries of Grupo Iusacell Celular, S.A. de C.V. and First
Union National Bank, as trustee, as the same may be amended from time to time.

         "Schedule" shall mean any of the schedules attached to this Agreement
and incorporated herein by this reference.

         "Site Lease" shall mean the site lease to be entered into with respect
to each Site acquired by Buyer hereunder pursuant to and in the form attached to
the Master Leases.

         "Sites" shall mean, collectively, Leased Sites and Owned Sites held by
Sellers.

         "Subordination Agreement" shall mean a subordination agreement executed
between Buyer and The Chase Manhattan Bank substantially in the form of Exhibit
O attached hereto.

         "Subsequent Closing" shall have the meaning ascribed to such term in
SECTION 2.5(b) of this Agreement.

         "Telecommunications Equipment" shall have the meaning ascribed to such
term in SECTION 5.3 of this Agreement

         "Tenant Lease" shall mean an agreement between Sellers or an Affiliate
of Sellers, on the one hand, and a third party not Affiliated with Sellers, on
the other hand, pursuant to which Sellers or such Affiliate rents to such third
party space on a Tower and/or elsewhere at a Site each of which are more
particularly described in Schedule 3.4(g).

         "Tenant Lease Assignment" shall mean an executed and acknowledged
Assignment and Assumption of Tenant Leases in recordable form, which Assignment
shall be substantially in the form of Exhibit D attached hereto.

         "Termination Date" shall mean December 31, 2004 or such other date as
the Parties may, from time to time, mutually agree.

                                       8
<PAGE>

         "Third Party Claim" shall have the meaning ascribed to such term in
SECTION 9.3 of this Agreement.

         "Towers" shall mean the transmission tower(s) located at each of the
Sites.

         "Tower Related Assets" shall mean, with respect to each Site, (a) the
security deposits (if any) from tenants under the Tenant Leases related to such
Site, (b) all rights to any warranties held by Sellers or any of its Affiliates
with respect to such Site, including without limitation, the related Tower, (c)
all rights under any Approvals held with respect to the ownership or operation
of such Site, (d) all current files and records of Sellers or any of its
Affiliates related to the ownership, occupancy or leasing of such Site and (f)
any condemnation or eminent domain awards or insurance proceeds received with
respect to such applicable Site.

         "Withdrawal Notice" shall have the meaning ascribed to such term in
SECTION 2.5(c) of this Agreement.

         "2001 Purchase Agreement" shall have the meaning ascribed to such term
in the recitals to this Agreement.

                                       9
<PAGE>

                             EXHIBIT A; EXHIBIT A-1

                              FORM OF GROUND LEASE

                         [EXHIBIT A-1: GROUND LEASES FOR

      HUB SITES WILL BE SUBSTANTIALLY IN FORM OF EXHIBIT A BUT WILL CONTAIN

      CONDITIONS REGARDING ACCESS TO SWITCHES AND INTERCONNECTION POINTS.]

                              (ENGLISH TRANSLATION)

                                 SITE __________

LEASE AGREEMENT ENTERED INTO BY AND BETWEEN _________, , (HEREINAFTER REFERRED
TO AS "LESSOR") REPRESENTED BY _______________ AND [MATC ENTITY], (HEREINAFTER
REFERRED TO AS "LESSEE") REPRESENTED BY _______________________, PURSUANT TO THE
FOLLOWING:

                                    RECITALS

I. THE "LESSOR" RECITES:

         (a) That it is a corporation legally organized and validly existing
under the laws of the United Mexican States with sufficient legal capacity to
enter into this Agreement and to undertake the obligations set forth hereunder,
as evidenced by public instrument No. __________ dated _________, __, granted
before Mr. ______________________, Notary Public No. __ of ________________,
registered before the Public Registry of Commerce of ___________________ under
commerce file No. ________.

         (b) That Mr. _____________________, has sufficient legal authority to
enter into this Agreement on behalf of "LESSOR" and to bind "LESSOR" in
accordance with the terms hereof, as evidenced by public instrument No. ________
dated _____________, ___, granted before Mr. ______________________, Notary
Public No. __ of _________________, registered before the Public Registry of
Commerce of __________________ under commerce file No. ___________, and that, as
of this date, such authority has not been revoked or limited in any manner
whatsoever.

         (c) That it is the owner of the real estate property described in Annex
"A" hereto, as evidenced by public deed No. ________________ dated ________, __
granted before Mr. __________, Notary Public No. __, of _____________, and
registered with the Public Registry of Property of _________, under file ______,
book _____, volume ______, series _____, pages ______, under number ______,.

         (d) That the real estate property referred to in recital I c) above is
"not" currently subject to any liens, restrictions or judgments affecting title
thereof.

         (e) That it is its intent to enter into this lease Agreement with
regard to certain portion of the real estate referred to in recital I c) above,
as described in Annex "A" (said portion hereafter referred to as the "REAL
ESTATE").

                                        1
<PAGE>

II. THE LESSEE RECITES:

         (f) To be a corporation organized and existing under the laws of the
United Mexican States, as evidenced by public deed No. 43,972 dated October 5,
1999, granted before Mr. Roberto Nunez y Bandera, Notary Public No 1 of Mexico
Federal District, registered with the Public Registry of Commerce of Mexico
Federal District under commerce file No. 253,584.

         (g) That its Federal Taxpayer Registry is MCE-991005-JZ5.

         (h) That its legal representative has sufficient legal authority to
execute this Agreement, which authority has not been revoked to this date.

III. BOTH PARTIES RECITE:

         (a) That on the date hereof, they entered into certain Purchase and
Sale Agreement, whereby "LESSOR" sells to "LESSEE" and "LESSEE" acquires certain
towers used for the installation of telecommunications equipment, including the
towers located in the "REAL ESTATE".

         (b) That on the date hereof, ______________[SUBSIDIARY OF GRUPO
IUSACELL LEASING AVAILABLE SPACE ON THE TOWER(s) LOCATED IN THE "REAL ESTATE"]
and "LESSEE" entered into that certain master lease agreement (hereinafter the
"MASTER LEASE"), whereby, "LESSEE" leases to ________________________ available
space in certain telecommunications towers.

         (c) That in virtue of the execution of the Purchase and Sale Agreement
referred to in recital III a) above and the Master Lease, it is the intent of
the parties to enter into this lease Agreement pursuant to the above recitals,
and in the terms and conditions contained in the following:

                                     CLAUSES

         FIRST.- PURPOSE OF THE LEASE.- "LESSOR" leases to "LESSEE" the "REAL
ESTATE" and "LESSEE" takes the use and enjoyment of the "REAL ESTATE" with the
purpose of installing and operating a telecommunications site. Activities of
Lessee shall include but not be limited to installing telecommunication towers,
building and operating a shelter for equipment and utilities, installing and
operating a power generator and leasing space on the tower(s) located within the
"REAL ESTATE" to third parties.

         LESSOR will cooperate with "LESSEE" so that "LESSEE" may be able to
operate the telecommunications sites, and will facilitate the contracting by
"LESSEE" of all necessary utilities and obtain the easements that may be
required, assuring "LESSEE" the peaceful use and enjoyment of the "REAL ESTATE",
without interruptions.

         SECOND.- RENT AND CONDITIONS OF PAYMENT.- "LESSEE" shall pay "LESSOR"
during the term of this Agreement, the amount of $__________.00(_______________
PESOS 00/100 Mexican Currency), plus the applicable Mexican value added tax, as
monthly rent for the "REAL ESTATE". Such rent shall be paid within the first
10(ten) business days of each month at the domicile that "LESSEE" designates for
such purpose, against delivery of the corresponding rent receipt, which shall
comply with all requirements set forth in the applicable tax regulations.

                                       2
<PAGE>

         The rent will be paid in advance, as set forth in the preceding
paragraph, even if "LESSEE" uses the "REAL ESTATE" for just a portion of the
corresponding month.

         "LESSEE" is hereby expressly authorized to totally or partially
withhold the rent payable hereunder, in the event ______________[SUBSIDIARY OF
GRUPO IUSACELL LEASING AVAILABLE SPACE ON THE TOWER(s) LOCATED IN THE "REAL
ESTATE"] fails to pay the rent under the "MASTER LEASE", until such rent is paid
in full.

         THIRD.- TERM.- This Agreement shall remain in effect for a term of 10
(ten) years, compulsory for both parties, as of the date of its execution (the
"INITIAL TERM"). "LESSEE" shall have the option to extend the "INITIAL TERM" for
an additional term of 10 (ten) years, by giving written notice to "LESSOR" at
least 30(thirty) calendar days prior to the termination of the "INITIAL TERM".
In such event, the terms and conditions of the Agreement will be the same .

         FORTH.- RENT INCREASES.- Both parties agree to increase the rent
payable under this Agreement, on an annual basis pursuant to the increases in
the National Consumers Price Index of Mexico (Indice Nacional de Precios al
Consumidor) published by Banco de Mexico in the Official Gazette of the
Federation. The basis for calculating such increase will be the National
Consumers Price Index published for the immediately preceding year, on the date
on which the "LESSOR" shall have the right to the corresponding annual increase.
Should such index cease to be published, the index designated by Banco de Mexico
for such purposes shall apply.

         FIFTH.- TERMINATION.- "LESSEE" agrees to vacate and deliver to
"LESSOR", the "REAL ESTATE" upon termination of this Agreement for any reason or
upon expiration of the term of this Agreement or any extension thereof.

         If the permits and/or authorizations necessary for the installation or
operation of telecommunication sites in the "REAL ESTATE" are revoked or denied
to "LESSEE" by the Authorities, LESSEE may terminate this Agreement without any
liability for "LESSEE" other than the obligation to pay rent until the "REAL
ESTATE" actually vacate the "REAL ESTATE" or termination of this Agreement, by
simple notice to "LESSOR" at least 30 (thirty) calendar days in advance.

         In case that (i) the competent authorities fail to grant or revoke the
permits or licenses necessary for the conducting in the "REAL ESTATE" of the
activities mentioned in Clause First, or (ii) "LESSEE" requires additional land
space and "LESSOR" does not provide it within the 30 (THIRTY) calendar days
following a written request from "LESSEE", "LESSEE" shall have the right to
terminate this Agreement, by notifying "LESSOR" at least 60(sixty) calendar days
in advance, and will perform all actions necessary to vacate the "REAL ESTATE".

         SIXTH.- PERMITS AND AUTHORIZATIONS.- "LESSEE" shall pay for and obtain,
at its sole expense, all permits, licenses and other requirements that the
corresponding authorities may request in connection with the activity to be
performed in the "REAL ESTATE".

         SEVENTH.- ACCESS TO THE REAL ESTATE.- "LESSEE" and its employees,
agents, constructors, contractors and subcontractors shall have free access to
the "REAL ESTATE", and "LESSOR" shall not restrain or limit their schedule,
allowing access to the "REAL ESTATE" 24

                                       3
<PAGE>

(twenty four) hours a day, 365 (three hundred and sixty five) days a year, prior
identification, if requested by "LESSOR".

         EIGHT.- ADAPTATIONS.- If necessary, "LESSEE" will perform, at its
expense, all work required to adapt the "REAL ESTATE".

         NINTH.- INSURANCE.- Lessee represents that it has in effect a civil
liability insurance policy to guaranty payment of the damages that may be caused
to third parties or the "REAL ESTATE", and, therefore, agrees to deliver, upon
request by "LESSOR", a certificate issued by the insurance company, evidencing
such coverage.

         TENTH.- ASSIGNMENT AND SUBLEASE.- "LESSEE" may sublease all or a
portion of the "REAL ESTATE" or assign all of its rights and obligations derived
from this Agreement without the consent of "LESSOR". This clause constitutes the
consent of or notice to "LESSOR" referred to in articles 2051 and 2480 of the
Federal Civil Code and its corresponding articles correlatives of the Civil
Codes of the political subdivisions of Mexico.

         ELEVENTH.-TAXES.- Each of the parties shall be liable for payment of
the taxes for which each of them is responsible in accordance with the
applicable tax regulations.

         TWELVE.- ADDITIONAL OBLIGATIONS.- "LESSEE" expressly agrees to:

1.       Comply with all Laws, Regulations and legal provisions applicable to
         the use of the "REAL ESTATE" and the Equipment.

2.       Keep the leased space in good condition.

         "LESSOR" expressly agrees:

1.       No to use or allow third parties to use the "REAL ESTATE" in a manner
         that could interfere with the operations of "LESSEE".

2.       Allow "LESSEE" to make the improvements and installations required in
         the "REAL ESTATE" for the performance of the activities related to the
         subject matter of this Agreement.

         THIRTEENTH.- TERMINATION.- The following shall constitute an event of
default by any of the parties:

1.       Failure to pay the Rent in more than two occasions within a period of
12 (TWELVE) months.

2.       If "LESSEE" uses the "REAL ESTATE" for a different purpose than the one
set forth in this Agreement.

3.       Failure to comply with any provision contained in this lease Agreement
or the Law.

                                       4
<PAGE>

         FOURTEENTH.- APPLICABLE LAW; JURISDICTION. This Agreement shall be
governed by and construed in accordance with the applicable laws of [STATE WHERE
THE SITE IS LOCATED].

         In the event of any dispute related to the interpretation, compliance
and enforcement of this Agreement, the parties submit to the jurisdiction of the
competent courts of Mexico City, Federal District, expressly waiving the
jurisdiction of any other court to which they may be entitled by reason of their
present of future domiciles or by any other reason.

         FIFTEENTH.- NOTICES; DOMICILES. The parties designate as their
domiciles to receive any notices, the following:

LESSOR:  Prolongacion Paseo de la Reforma 1236
         Colonia Santa Fe, 05348
         Mexico, D.F.

LESSEE:  Ejercito Nacional 904
         Piso 17
         Col. Palmas Polanco
         11560, Mexico, D.F. 06170

         Any change to the above mentioned domiciles shall be notified by one
party to the other within 15 (fifteen) calendar days following the date of such
change, otherwise, all notices shall be deemed to be validly delivered at the
domiciles previously indicated.

ONCE READ AND UNDERSTOOD THE SCOPE, CONTENT AND LEGAL EFFECT, THE PARTIES,
EXECUTE THIS AGREEMENT IN FIVE COUNTERPARTS IN THE CITY OF ________, ON
__________, 2000.

"LESSOR"                                      "LESSEE"

________________________                      ___________________________
Mr.

WITNESSES

________________________                      _____________________________
Mr.

                                       5
<PAGE>

                             ANNEX A TO GROUND LEASE

                                   REAL ESTATE

                                       1
<PAGE>

                                    EXHIBIT B

                             [INTENTIONALLY DELETED]

                                       1
<PAGE>

                                    EXHIBIT C

                                 FORM OF INVOICE

                                    [TO COME]

                                       1
<PAGE>

                                    EXHIBIT D
                              (ENGLISH TRANSLATION)

                              LAND LEASE ASSIGNMENT

ASSIGNMENT AGREEMENT ENTERED INTO BY AND AMONG SOS TELECOMUNICACIONES, S.A. DE
C.V. (HEREINAFTER "SOS"), TELECOMUNICACIONES DEL GOLFO, S.A. DE C.V.
(HEREINAFTER "TELGOLFO"), COMUNICACIONES CELULARES DE OCCIDENTE, S.A. DE C.V.
(HEREINAFTER "COMCEL"), IUSATELECOMUNICACIONES, S.A. DE C.V. (HEREINAFTER
"IUSATELECOMUNICACIONES"), SISTEMAS TELEFONICOS PORTATILES CELULARES, S.A. DE
C.V. (HEREINAFTER "SISTEPOR"), AND IUSACELL PCS, S.A. DE C.V. (HEREINAFTER
"PCS"), (PCS SOS, TELFOLFO, COMCEL, IUSATELECOMUNICACIONES AND SISTEPOR
HEREINAFTER JOINTLY REFERRED TO AS "ASSIGNORS"), ALL OF THEM REPRESENTED BY
___________________, AND [MATC ENTITY], (HEREINAFTER REFERRED TO AS "ASSIGNEE"),
REPRESENTED BY _____________________, IN ACCORDANCE WITH TO THE FOLLOWING
RECITALS AND CLAUSES:

                                    RECITALS

I.-      ASSIGNORS RECITE, THROUGH THEIR REPRESENTATIVE:

I.1      SOS recites, through its representative:

         (a) That it is a corporation legally organized and validly existing
under the laws of the United Mexican States, as evidenced by public instrument
No. 35,135 dated September 28, 1993, granted before Mr. Roberto Nunez y Bandera,
Notary Public No. 1 of Mexico City, Federal District, registered before the
Public Registry of Commerce of Mexico Federal District under commerce file No.
177150, dated November 16, 1994.

         (b) That __________________, has sufficient legal authority to enter
into this agreement on behalf of SOS and to bind SOS in accordance with the
terms hereof, as evidenced by public instrument No. _____ dated _______, ____
granted before Mr. __________________, Notary Public No. ___ of Mexico City,
Federal District, registered before the Public Registry of Commerce of Mexico
City, Federal District under commercial file No._______ dated ______, ____, and
that, as of this date, such authority has not been revoked or limited in any
manner whatsoever.

         (c) That its Federal Taxpayer Registry number is STE 930930-CV7.

         (d) That it has entered into the lease agreements described in Annex
"A" hereof, pursuant to which it leases the real estate properties described in
such Annex "A" (hereinafter referred to as the "LEASE AGREEMENTS OF SOS")

         (e) That it desires to assign to the ASSIGNEE the rights and
obligations derived from the LEASE AGREEMENTS OF SOS, in accordance with the
terms and conditions hereof.

                                       1
<PAGE>

I.2 TELGOLFO recites through its representative:

         (a) That it is a corporation legally organized and validly existing
under the laws of the United Mexican States, as evidenced by public instrument
No. 54,960, dated December 11, 1989, granted before Mr. Gerardo Correa
Etchegaray, Notary Public No. 89 of Mexico Federal District, registered before
the Public Registry of Commerce of Mexico Federal District under commercial file
No. 132,047, dated August 6, 1990.

         (b) That __________________ has sufficient legal authority to enter
into this agreement on behalf of TELGOLFO and to bind TELGOLFO in accordance
with the terms hereof, as evidenced by public instrument No. 3,633 dated April
3, 1997, granted before Mr. Francisco I. Hugues Velez, Notary Public No. 212 of
Mexico City, Federal District, registered before the Public Registry of Commerce
of Mexico City, Federal District under commerce file No. 132,047, dated May 29,
1997, and that as of this date, such authority has not been revoked or limited
in any manner whatsoever.

         (c) That its Federal Taxpayer Registry number is TGO 891215 261.

         (d) That it has entered into the lease agreements described in Annex
"B" hereof, pursuant to which it leases the real estate properties described in
such Annex "B" (hereinafter referred to as the "LEASE AGREEMENTS OF TELGOLFO").

         (e) That it desires to assign to ASSIGNEE the rights and obligations
derived from the LEASE AGREEMENTS OF TELGOLFO, in accordance with the terms and
conditions hereof.

I.3 COMCEL recites through its representative:

         (a) That it is a corporation legally organized and validly existing
under the laws of the United Mexican States, as evidenced by public instrument
No. 28,252 dated April 5, 1990, granted before Mr. Roberto Nunez y Bandera,
Notary Public No. 1 of Mexico City, Federal District, registered before the
Public Registry of Commerce of Mexico Federal District under commercial file No.
129,267, dated May 29, 1997.

         (b) That ________________ has sufficient legal authority to enter into
this agreement on behalf of COMCEL and to bind COMCEL in accordance with the
terms hereof, as evidenced by public instrument No. 3,634 dated April 3, 1997
granted before Mr. Francisco I. Hugues Velez, Notary Public No. 212 of Mexico
Federal District, registered before the Public Registry of Commerce of Mexico
Federal District under commercial file No. 129,279, dated May 29, 1997, and that
as of this date, such authority has not been revoked or limited in any manner
whatsoever.

         (c) That its Federal Taxpayer Registry number is CCO 900405 4D7.

         (d) To have entered into the lease agreements described in Annex "C"
hereof, pursuant to which it leases the real estate properties described in such
Annex "C" (hereinafter referred to as the "LEASE AGREEMENTS OF COMCEL").

                                       2
<PAGE>

         (e) That it desires to assign to ASSIGNEE the rights and obligations
derived from the LEASE AGREEMENTS OF COMCEL, in accordance with the terms and
conditions hereof.

I.4 IUSATELECOMUNICACIONES recites through its representative:

         (a) That it is a corporation legally organized and validly existing
under the laws of the United Mexican States, as evidenced by public instrument
No. 36,636 dated August 23, 1994, granted before Mr. Roberto Nunez y Bandera,
Notary Public No. 1 of Mexico City, Federal District, registered before the
Public Registry of Commerce of Mexico City, Federal District under commercial
file No. 190,095, dated May 23, 1997.

         (b) That __________________ has sufficient legal authority to enter
into this agreement on behalf of IUSATELECOMUNICACIONES and to bind
IUSATELECOMUNICACIONES in accordance with the terms hereof, as evidenced by
public instrument No. 3,628 dated April 3, 1997 granted before Mr. Francisco I.
Hugues Velez, Notary Public No. 212 of Mexico Federal District, registered
before the Public Registry of Commerce of Mexico Federal District under
commercial file No. 190,095, dated May 23, 1997, and that as of this date, such
authority has not been revoked or limited in any manner whatsoever.

         (c) That its Federal Taxpayer Registry number is IUS 940826 G61.

         (d) That it has entered into the lease agreements described in Annex
"D" hereof, pursuant to which it leases the real estate properties described in
such Annex "D" (hereinafter referred to as the "LEASE AGREEMENTS OF
IUSATELECOMUNICACIONES").

         (e) That it desires to assign to ASSIGNEE the rights and obligation
derived from the LEASE AGREEMENTS OF IUSATELECOMUNICACIONES, according to the
Recitals and Clauses hereof.

I.5 SISTEPOR recites through its representative:

         (a) That it is a corporation legally organized and validly existing
under the laws of the United Mexican States, as evidenced by public instrument
No. 54,624 dated October 23, 1989, granted before Mr. Gerardo Correa Etchegaray,
Notary Public No. 89 of Mexico City, Federal District, registered before the
Public Registry of Commerce of Mexico City, Federal District under commercial
file No. 126,502 dated March 19, 1990.

         (b) That __________________ has sufficient legal authority to enter
into this agreement on behalf of SISTEPOR and to bind SISTEPOR in accordance
with the terms hereof, as evidenced by public instrument No. 3,635 dated April
3, 1997 granted before Mr. Francisco I. Hugues Velez, Notary Public No. 212 of
Mexico City, Federal District, registered before the Public Registry of Commerce
of Mexico City, Federal District under commercial file No. 126,502, dated May
29, 1997, and that as of this date, such authority has not been revoked or
limited in any manner whatsoever.

         (c) That its Federal Taxpayer Registry number is STP 891027 EQ1.

                                       3
<PAGE>

         (d) That it has entered into the lease agreements described in Annex
"E" hereof, pursuant to which it leases the real estate properties described in
such Annex "E" (hereinafter referred to as the "LEASE AGREEMENTS OF SITEPOR").

         (e) That it desires to assign to the ASSIGNEE the rights and obligation
derived from the LEASE AGREEMENTS OF SISTEPOR, in accordance with the terms and
conditions hereof.

I.6 PCS recites through its representative:

         (a) That it is a corporation legally organized and validly existing
under the laws of the United Mexican States, as evidenced by public instrument
No. ____ dated ______, granted before ___________, Notary Public No. ___ of
_______, Federal District registered before the Public Registry of Commerce of
_______, Federal District under commercial file No. _____ dated ________.

         (b) That __________________ has sufficient legal authority to enter
into this agreement on behalf of PCS and to bind PCS in accordance with the
terms hereof, as evidenced by public instrument No. ______ dated _______ granted
before_____________, Notary Public No. ___ of_______, Federal District,
registered before the Public Registry of Commerce of_____, Federal District
under commercial file No.______, dated________, and that as of this date, such
authority has not been revoked or limited in any manner whatsoever.

         (c) That its Federal Taxpayer Registry number is__________.

         (d) That it has entered into the lease agreements described in Annex
"F" hereof, pursuant to which it leases the real estate properties described in
such Annex "F" (hereinafter referred to as the "LEASE AGREEMENTS OF PCS" and
together with the LEASE AGREEMENTS OF SOS, the LEASE AGREEMENTS OF TELGOLFO, the
LEASE AGREEMENTS OF COMCEL and the LEASE AGREEMENTS OF IUSATELECOMUNICACIONES,
the LEASE AGREEMENTS OF SISTEPOR hereinafter the "LEASE AGREEMENTS").

That it desires to assign to the ASSIGNEE the rights and obligation derived from
the LEASE AGREEMENTS OF PCS, in accordance with the terms and conditions hereof

II. ASSIGNEE RECITES, THROUGH ITS REPRESENTATIVE:

         (e) That it is a corporation legally organized and validly existing
under the laws of the United Mexican States, as evidenced by public instrument
No.43,972 dated October 5, 1999, granted before Mr. Roberto Nunez y Bandera,
Notary Public No. 1 of Mexico City, Federal District, registered before the
Public Registry of Commerce of Mexico City, Federal District, under commercial
file No. 253,584 dated October 27, 1999.

         (f) That _____________________ has sufficient legal authority to enter
into this agreement on behalf of ASSIGNEE and to bind ASSIGNEE in accordance
with the terms hereof, as evidenced by public instrument No. ______ dated
_________, ____, granted before ______________, Notary Public No. 1 of Mexico
City, Federal District, registered before the Public Registry of Commerce of
Mexico City, Federal District, under commercial file No.

                                       4
<PAGE>

_______ dated __________, ____, and that as of this date, such authority has not
been revoked or limited in any manner whatsoever.

         (g) That its Federal Taxpayer Registry number is MCE 991005 J25.

         (h) That it desires to enter into this agreement in accordance with the
terms and conditions hereof.

         (i) That assignee has sufficient legal and economic capacity to enter
into this agreement and to be bound in accordance with the terms hereof and the
LEASE AGREEMENTS.

III. THE PARTIES TO THIS AGREEMENT RECITE, THROUGH THEIR REPRESENTATIVES:

         (a) That on _______ they entered into that certain purchase and sale
agreement (hereinafter the "ASSET PURCHASE AGREEMENT"), whereby ASSIGNORS agreed
to sell and ASSIGNEE agreed to purchase certain towers for the installation of
telecommunications equipment, which towers include those located in the real
estate properties subject of the LEASE AGREEMENTS.

         (b) That according to the ASSET PURCHASE AGREEMENT, ASSIGNORS undertook
to assign to ASSIGNEE, their rights derived from the LEASE AGREEMENTS.

In view of the foregoing, the parties agree as follows:

                                     CLAUSES

FIRST.- PURPOSE.- ASSIGNORS hereby assign to ASSIGNEE, all of their rights and
obligations under the LEASE AGREEMENTS to which they are a party, which
assignment shall be effective from the date hereof. ASSIGNEE hereby accepts such
assignment and undertakes each and all of the obligations derived from the LEASE
AGREEMENTS, pursuant to the provisions of the ASSET PURCHASE AGREEMENT.

The parties hereto agree and acknowledge that the assignment subject matter of
this agreement, refers only and exclusively to the rights and obligations
derived from the LEASE AGREEMENTS and not to the telecommunications equipment,
tower and other assets related to the telecommunications sites and that are
located within the properties subject of the LEASE AGREEMENTS which, in its
case, shall be transferred to ASSIGNEE pursuant to the ASSET PURCHASE AGREEMENT.
The parties hereto agree that ASSIGNEE does not assume any responsibility or
liability other than those set forth in the ASSET PURCHASE AGREEMENT.

SECOND.- NOTICES.- ASSIGNORS agree to notify the lessors party to each of the
LEASE AGREEMENTS, the assignment effected pursuant to this agreement, within 30
(thirty) days following the date hereof, using the form of notice attached to
this Agreement as Annex "G" and, in its case, in the terms agreed with any of
such lessors.

THIRD.- ASSET PURCHASE AGREEMENT.- This agreement is entered into pursuant to
and subject to the terms of the ASSET PURCHASE AGREEMENT. For all matters not

                                       5
<PAGE>

expressly provided for in this agreement, the ASSET PURCHASE AGREEMENT shall
apply. In case of conflict between this agreement and the ASSET PURCHASE
AGREEMENT, the ASSET PURCHASE AGREEMENT shall prevail.

FOURTH.- FURTHER ACTIONS.- The parties agree to execute, perform or to cause to
be executed or performed any other agreements or documents that any of them
deems necessary to consummate the transactions contemplated in this agreement.

FIFTH.- DOMICILES.- For all legal purpose in connection with this agreement, the
parties designate as their domiciles, the following:

ASSIGNORS: Prolongacion Paseo de la Reforma No. 1236. Col. Santa Fe, C.P. 05348
in Mexico Federal District.

ASSIGNEE: Ejercito Nacional 904, Piso 17, Col. Palmas Polanco, 11560, Mexico,
D.F..

All notices, consents, approvals, or any other communications that the parties
may deliver under this agreement shall be in writing and delivered to the
addresses provided above. Both parties agree to effectively notify the other
party any change in their domiciles.

SIXTH.- GOVERNING LAW; JURISDICTION.- This agreement shall be governed and
construed in accordance with the applicable laws of the United Mexican States.
For the interpretation, performance and enforcement of this agreement, the
Parties expressly submit to the jurisdiction of the competent courts of Mexico
City, Federal District, expressly waving any other jurisdiction to which they
may be entitled by reason of their present or future domiciles.

THE PARTIES, EXECUTE THIS AGREEMENT IN MEXICO CITY, FEDERAL DISTRICT, ON
__________, 2003.

                                       6
<PAGE>

                                    ASSIGNORS

________________________                          ____________________________

SOS TELECOMUNICACIONES,                           TELECOMUNICACIONES DEL
S.A. DE C.V.                                      GOLFO, S.A. DE C.V.

BY: [NAME]                                        BY: [NAME]

___________________________                       ____________________________
COMUNICACIONES CELULARES DE                       IUSATELECOMUNICACIONES, S.A.
OCCIDENTE, S.A.                                   DE C.V. DE C.V.

BY: [NAME]                                        BY: [NAME]

___________________________                       ____________________________
SISTEMAS TELEFONICOS POTATILES                    IUSACELL PCS, S.A. DE C.V.
CELULARES, S.A. DE C.V.
BY: [NAME]

                                    ASSIGNEE

                        _________________________________
                        [MATC CELULAR], S. DE R.L. DE C.V.
                        BY: [NAME]

                                    WITNESSES

_____________________________________             ______________________________
[NAME]                                            [NAME]

                                       7
<PAGE>

                                     ANNEX A
                            TO LAND LEASE ASSIGNMENT

                             LEASE AGREEMENTS OF SOS

                                       8
<PAGE>

                                     ANNEX B
                            TO LAND LEASE ASSIGNMENT

                          LEASE AGREEMENTS OF TELGOLFO

                                       9
<PAGE>

                                     ANNEX C
                            TO LAND LEASE ASSIGNMENT

                           LEASE AGREEMENTS OF COMCEL

                                       10
<PAGE>

                                     ANNEX D
                            TO LAND LEASE ASSIGNMENT

                   LEASE AGREEMENTS OF IUSATELECOMUNICACIONES

                                       11
<PAGE>

                                     ANNEX E
                            TO LAND LEASE ASSIGNMENT

                          LEASE AGREEMENTS OF SISTEPOR

                                       12
<PAGE>

                                     ANNEX F
                            TO LAND LEASE ASSIGNMENT

                             LEASE AGREEMENTS OF PCS

                                       13
<PAGE>

                                     ANNEX G
                            TO LAND LEASE ASSIGNMENT

                            FORM OF NOTICE TO LESSORS

                                       14
<PAGE>

                                    EXHIBIT E
                              (ENGLISH TRANSLATION)

                 ASSIGNMENT AND ASSUMPTION OF RELATED CONTRACTS

                                    [TO COME]

                                        1
<PAGE>

                                    EXHIBIT F
                     FORM OF SELLERS' OFFICER'S CERTIFICATE

                                [NAME OF COMPANY]

                              OFFICER'S CERTIFICATE

         This certificate is being delivered pursuant to SECTION 6.1(c) of the
Purchase and Sale Agreement, dated as of _________________, ________, by and
between Sistemas Telefunicos Portatiles Celulares, S.A. de C.V.,
Telecommunicaciones del Golfo, S.A. de C.V., Comunicaciones Celulares de
Occidente, S.A. de C.V., Iusatelecomunicaciones, S.A. de C.V. and SOS
Telecomunicaciones, S.A. de C.V., Iusacell PCS, S.A. de C.V. and [MATC Entity],
with the appearance of GRUPO IUSACELL CELULAR, S.A. de C.V. (the "Purchase
Agreement").

         ____________________ of _____________________ (the "Company"), does
hereby certify that:

         1.       The representations and warranties of the Company contained in
the Purchase Agreement are true and complete in all material respects on and as
of the date hereof as if made on and as of the date hereof, except for changes
contemplated by the Purchase Agreement and except for representations and
warranties made as of a specific date, which are certified as true and complete
in all material respects as of such date; and

         2.       The obligations and covenants contained in the Purchase
Agreement to be performed and complied with by the Company on or prior to the
date hereof have been performed or complied with.

         IN WITNESS WHEREOF, the undersigned has executed this Certificate this
_____ day of _________________, ______.

                                            ___________________________________
                                            Name:
                                            Title:

                                        1
<PAGE>

                                    EXHIBIT G
                    FORM OF SELLERS' SECRETARY'S CERTIFICATE

                                [NAME OF COMPANY]

                             SECRETARY'S CERTIFICATE

                                     [DATE]

         I, _______________, do hereby certify that I am the duly elected,
qualified and acting Secretary of ____________________, a corporation organized
and existing under the laws of Mexico (the "Corporation"), and that attached
hereto as Exhibit A is a true and correct copy of the resolutions of the [BOARD
OF DIRECTORS/SHAREHOLDERS MEETING] of the Corporation duly adopted at a regular
meeting of the [BOARD/SHAREHOLDERS] held on ______________, and that such
resolutions are the only resolutions adopted by said [BOARD OF
DIRECTORS/SHAREHOLDERS MEETING] relating to the matters referred to therein, and
attached hereto as Exhibit B is a true and correct copy of the charter/escritura
constitutiva of the Corporation, and attached hereto as Exhibit C is a true and
correct copy of the current By Laws (estatutos vigentes) of the Corporation, and
that none of the foregoing have been amended, revised, modified or rescinded
except as set forth therein and such documents remain in full force and effect
as of the date hereof.

                                      __________________________________________
                                      Name:

         I, _______________., ___________________ of the Corporation, hereby
certify that the foregoing signature of ____________ is his genuine signature
and that he is the duly elected, qualified and acting Secretary of the
Corporation.

                                      __________________________________________
Dated:

                                       1
<PAGE>

                                    EXHIBIT H
                     FORM OF BUYER'S DIRECTOR'S CERTIFICATE

                                  [MATC ENTITY]

                             DIRECTOR'S CERTIFICATE

         This certificate is being delivered pursuant to SECTION 7.1(D) of the
Purchase and Sale Agreement, dated as of ________________, 2003, by and between
Sistemas Telefunicos Portatiles Celulares, S.A. de C.V., Telecommunicaciones del
Golfo, S.A. de C.V., Comunicaciones Celulares de Occidente, S.A. de C.V.,
Iusatelecomunicaciones, S.A. de C.V. and SOS Telecomunicaciones, S.A. de C.V.,
Iusacell PCS, S.A. de C.V. and [MATC Entity], with the appearance of GRUPO
IUSACELL CELULAR, S.A. de C.V. (the "Purchase Agreement").

         ____________________, a director of [MATC Entity] (the "Company"), does
hereby certify that:

         1.       The representations and warranties of the Company contained in
the Purchase Agreement are true and complete in all material respects on and as
of the date hereof as if made on and as of the date hereof, except for changes
contemplated by the Purchase Agreement and except for representations and
warranties made as of a specific date, which are certified as true and complete
in all material respects as of such date; and

         2.       The obligations and covenants contained in the Purchase
Agreement to be performed and complied with by the Company on or prior to the
date hereof have been performed or complied with.

         IN WITNESS WHEREOF, the undersigned has executed this Certificate this
_____ day of _________________, 2003.

                                    [MATC Entity]

                                    By:______________________________________
                                       Name:
                                       Title:

                                       1
<PAGE>

                                    EXHIBIT I
                     FORM OF BUYER'S SECRETARY'S CERTIFICATE

                                  [MATC ENTITY]

                             Secretary's Certificate

                                     [DATE]

         I, [Santiago Corcuera Cabezut], do hereby certify that I am the duly
elected, qualified and acting Assistant Secretary of [[MATC Entity], a company
organized and existing under the laws of Mexico (the "Company"), that in
accordance with the by-laws of the Company, no resolutions of the Board of
Directors or partners' meeting of the Company must be adopted by said Board of
Directors or partners' meeting in connection with the transactions referred to
in the Purchase and Sale Agreement dated ________, entered into by and between
Sistemas Telefonicos Portatiles Celulares, S.A. de C.V., Telecomunicaciones del
Golfo, S.A. de C.V., Comunicaciones Celulares de Occidente, S.A. de C.V.,
Iusatelecomunicaciones, S.A. de C.V., SOS Telecomunicaciones, S.A. de C.V.,
Iusacell PCS, S.A. de C.V., Grupo Iusacell, S.A. de C.V. and [MATC ENTITY], and
attached hereto as Exhibit A is a ---------- true and correct copy of the
Charter and By-Laws (escritura constitutiva y estatutos vigentes) of the
Company, and that none of the foregoing have been amended, revised, modified or
rescinded except as set forth therein and such documents remain in full force
and effect as of the date hereof.

                                       _________________________________
                                       Name: [Santiago Corcuera Cabezut]
                                       Title:   Secretary of the Company

Dated:

                                       1
<PAGE>

                                    EXHIBIT A
                           CHARTER & BY-LAWS OF SELLER

                                       2
<PAGE>

                                    EXHIBIT J
                   FORM OF OPINION OF SELLERS' OUTSIDE COUNSEL

                               [TO BE AGREED UPON]

                                       1
<PAGE>

                                    EXHIBIT K
                       FORM OF MLA FOR THE PURCHASED SITES

                       [TO BE AGREED BETWEEN THE PARTIES]

                                       1
<PAGE>

                                    EXHIBIT L
                             [INTENTIONALLY DELETED]

                                       1
<PAGE>

                                    EXHIBIT M
                             [INTENTIONALLY DELETED]

                                       1
<PAGE>

                                    EXHIBIT N
                   FORM OF OPINION OF BUYER'S GENERAL COUNSEL

                            [FORM TO BE AGREED UPON]

                                       1
<PAGE>

                                    EXHIBIT O
                         FORM OF SUBORDINATION AGREEMENT

JPMorgan Chase Bank
as Collateral Agent
270 Park Avenue
New York, New York 10017

         Please be advised as follows:

         1.       MATC Digital, S. de R.L. de C.V. (hereafter "MATC") as buyer
has entered into a Purchase and Sale Agreement dated as of December 19, 2003
(the "Purchase and Sale Agreement") with Grupo Iusacell Celular, S.A. de C.V.,
Sistemas Telefonicos Portatiles Celulares, S.A. de C.V., Telecomunicaciones del
Golfo, S.A. de C.V., Comunicaciones Celulares de Occidente, S.A. de C.V.,
Iusatelecomunicaciones, S.A. de C.V., SOS Telecomunicaciones, S.A. de C.V.,
Portatel del Sureste, S.A. de C.V. and Iusacell PCS, S.A. de C.V. (jointly the
"Sellers"), whereunder MATC purchased or agreed to purchase from the Sellers the
Sellers' interests in the Sites listed on Schedule I hereto (the "Sites").

         2.       MATC and MATC Celular as lessor have entered into an amended
and Restated Master Lease Agreement (the"Master Lease") dated December 19, 2003
with Iusacell Arrendadora, S.A. de C.V. as lessee (the "Lessee") and Grupo
Iusacell, S.A. de C.V., as joint obligor whereunder MATC agreed to lease the
Sites to the Lessee under the terms and conditions of the Master Lease.

         3.       MATC hereby irrevocably agrees and covenants that (A) neither
the sale nor the lease of the Sites cancels, diminishes, or affects in any
manner whatsoever the security interests created by Sellers in the Sellers'
telecommunications equipment which constitutes Collateral (as defined in the
Credit Agreement referred to below) located on or in shelters at the base of
such Sites in favor of JPMorgan Chase Bank (f/k/a The Chase Manhattan Bank) as
Collateral Agent (together with its successors and assignees, the "Collateral
Agent") for the Lenders (as defined therein) under the Amended and Restated
Credit Agreement dated as of July 25, 1997 and amended and restated as of March
29, 2001 among Grupo Iusacell Celular, S.A. de C.V., formerly known as Grupo
Iusacell, S.A. de C.V. (the "Company"), the Lenders party thereto and The Chase
Manhattan Bank, as amended (the "Credit Agreement"), which security interests
were perfected under (i) a Mortgage Agreement dated July 25, 1997, which was
notarized under notorial deed number 5,114 dated December 1, 1997 registered
with the Public Registry of Commerce of Mexico under commercial files no.
129,279; 126,502; 168,528; 177,150; 120,042; and 132,047, amended under (a) the
First Amendment to the Mortgage notarized under notorial deed number 8,824,
dated April 15, 1999, and (b) the Second Amendment to the Mortgage Agreement
granted by means of a notarial deed number 3,196, dated March 29, 2001 and
registered under the same commercial files and (ii) a mortgage granted by means
of notarial deed number 6,283, dated April 30, 2002, registered with the Public
Registry of Commerce of Mexico under commercial file number 298,914, by Portatel
del Sureste, S.A. de C.V. and Portatel Comercializadora, S.A. de C.V. (said
Collateral Agent and Lenders collectively, the "Secured Parties"); (B) any
interest MATC may have in the Collateral described in subsection (A) above is
expressly subordinated to the security interests of the Secured Parties in all
such Collateral; (C) if necessary, MATC shall notify any entity with an interest
in MATC's rights under the Master

                                       1
<PAGE>

Lease or any Site Lease, pursuant to Section 13 of the Master Lease, of the
subordination provisions included herein; (D) MATC shall maintain in trust and
pay over to the Secured Parties any and all amounts received in respect of the
sale of the Collateral described in subsection (A) above, if any, upon
foreclosure of its rights, if any, in respect of such Collateral or in
connection with the bankruptcy, concurso mercantil or insolvency of any of the
Sellers; and (E) MATC will not interfere in the exercise by any Secured Party of
any of its rights under the Credit Agreement and the Security Documents (as
defined in the Credit Agreement) with respect to such Collateral.

         4.       MATC further irrevocably agrees and covenants that it will
notify the Collateral Agent simultaneously with either (or both) of the Lessee
or the Joint Obligor of any default by either the Lessee or the Joint Obligor
under the Master Lease, and shall afford the Collateral Agent the same right to
cure any default as such Lessee or the Joint Obligor except that any such cure
period afforded to the Collateral Agent shall not be less than ten (10) days
after receipt by the Collateral Agent of the relevant default notice issued by
MATC.

         5.       Subject to the terms of this letter agreement and in
particular to its senior rights in respect of the Collateral, JPMorgan Chase
Bank, as Collateral Agent for the Lenders, hereby consents to the transfer of
the Sites by the Sellers to MATC as contemplated by the Purchase and Sale
Agreement; provided, however, that such consent shall not be deemed to be a
waiver of the conditions set forth in the Credit Agreement and shall not
prejudice the rights of the Collateral Agent and the Lenders under the Credit
Agreement and the Security Documents. JPMorgan Chase Bank, as Collateral Agent
for the Lenders, further acknowledges that upon transfer of the Sites to MATC
the Mortgage with respect to such Sites shall be released.

                               Sincerely,

                               MATC DIGITAL, S. DE R.L. DE .C.V.

                               by :____________________________________________
                                   Name
                                   Title

                               by  ____________________________________________
                                   Name:
                                   Title:

                                       2
<PAGE>

ACCEPTED AND AGREED:

JPMORGAN CHASE BANK,
as Collateral Agent for the Lenders,

by______________________________________
  Name:
  Title:

                                       3
<PAGE>

                                   SCHEDULE 1

                                     SITES

<TABLE>
<CAPTION>
                           IDENTIFICATION
NOMBRE DEL SITIO                       REGION         No ID
<S>                                    <C>            <C>
PORFIRIO DIAZ                             R1          R10001
CORPORATIVO                               R1          R10002
DESHUESADERO (LA GLORIA)                  R1          R10003
AMERICAS                                  R1          R10004
CORONA (ROSARITO)                         R1          R10006
CHAPULTEPEC                               R1          R10007
MAESTROS FEDERALES                        R1          R10008
SANTA ROSA                                R1          R10009
SOS MEXICALI                              R1          R10010
ZACATECAS                                 R1          R10011
BUENOS AIRES                              R4          R40001
ZAPATERIAS                                R4          R40003
IUSATEL                                   R4          R40004
REYNOSA CENTRO ( SAN CARLOS )             R4          R40005
CD. MADERO                                R4          R40006
LINARES                                   R4          R40008
SAN JOSE                                  R4          R40009
MONCLOVA                                  R4          R40010
LA SILLA                                  R4          R40011
CIUDAD JUAREZ                             R4          R40012
CANADA                                    R5          R50001
PATRIA                                    R5          R50002
FRESNO                                    R5          R50003
PROVIDENCIA                               R5          R50004
SOL                                       R5          R50005
SANTA FE (CERRO GRANDE)(LA FE)de)         R5          R50006
(La Fe)  (Torre I)
MEXICO                                    R5          R50007
LA BARCA (Torre I)                        R5          R50008
LADRON DE GUEVARA                         R5          R50009
CONSTITUYENTES                            R5          R50010
VILLAS UNIVERSITARIAS                     R5          R50011
CENTRAL CAMIONERA                         R5          R50012
CHAPULTEPEC                               R5          R50013
CERRO BOLUDO (Torre I y Torre II)         R5          R50014
NUEVO VALLARTA                            R5          R50015
</TABLE>

                                       4
<PAGE>

<TABLE>
<CAPTION>
                           IDENTIFICACION
NOMBRE DEL SITIO                       REGION         No ID
<S>                                    <C>            <C>
CERRO BURRO (Torre I)                     R5          R50016
EL TULE (Torre I)                         R5          R50017
APATZINGAN (Torre I)                      R5          R50018
ZOOLOGICO                                 R5          R50019
ZITACUARO                                 R5          R50020
PUNTA SANTIAGO                            R5          R50021
LA CUMBRE (Torre I)                       R5          R50022
VIGIA                                     R5          R50023
REP. PENAL (ZAPOTLANEJO)                  R5          R50024
REP. TUNEL LA MINERVA (IHUATZIO)          R5          R50025
CIUDAD INDUSTRIAL (ZONA INDUSTRIAL        R5          R50026
MORELIA)
SAN PABLO                                 R6          R60001
LOS GALLOS                                R6          R60002
EL DORADO                                 R6          R60003
LA CAL                                    R6          R60004
PLATEROS                                  R6          R60005
SAN MIGUEL DE ALLENDE                     R6          R60006
BUGAMBILIAS                               R6          R60007
JARDINES                                  R6          R60008
CALVILLO                                  R6          R60009
SAN JOSE ITURBIDE                         R6          R60010
CORPORATIVO                               R6          R60011
PALO HUERFANO                             R6          R60012
MUNOZ                                     R6          R60013
SAN MARTIN                                R6          R60014
OJO DE AGUA                               R6          R60015
ALTAMIRA                                  R7          R70001
CALERA  (Switch Pue) (Coubic.             R7          R70002
Telmex- propio)
COFRE DE PEROTE                           R7          R70003
CUMBRES DEL LLANO LARGO                   R7          R70004
EL VIGIA                                  R7          R70005
FRESNO                                    R7          R70006
GOROZPE                                   R7          R70007
HUEXOTITLA                                R7          R70008
LA MIRA (ACAPULCO II) (coubic             R7          R70009
Telmex-propio)
</TABLE>

                                       5
<PAGE>

<TABLE>
<CAPTION>
                           IDENTIFICACION
        NOMBRE DEL SITIO               REGION         No ID
<S>                                    <C>            <C>
LAS BRISAS                                R7          R70010
MEDANO DEL MORRO                          R7          R70011
MEDANO DEL PERRO (Coubic                  R7          R70012
Telmex-propio) (COUBIC VERACRUZ)

SALINA CRUZ                               R7          R70013
SAN JUAN (SAN JUAN II) (EL FORTIN)        R7          R70014
SANTIAGO TULA                             R7          R70015
TERRAZAS                                  R7          R70016
TLALCOYUNGA (HUAUCHINANGO)                R7          R70017
TUXPAN, IGUALA                            R7          R70018
VERACRUZ CENTRO (COSTERA)                 R7          R70019
ALQUITRAN                                 R7          R70020
REP. MAXITUNEL ACAPULCO (TUCA)            R7          R70021
REP. TEZIUTLAN (Coubic                    R7          R70022
Telmex-propio)
SAN MIGUEL CANOA                          R7          R70023
SUCHIAPA (XUCHAPA)                        R7          R70024
TEHUANTEPEC                               R7          R70025
TEZOYUCA (REP. E ESPERANZA)               R7          R70026
TELEREUNION VERACRUZ                      R7          R70027
COUBIC. ATLIXCO                           R7          R70028
COLOCADA (Switch Merida)                  R8          R80001
MONTEJO                                   R8          R80002
HYATT                                     R8          R80003
CENTRO                                    R8          R80004
AEROPUERTO                                R8          R80005
PLAZA DORADA                              R8          R80006
PROGRESO                                  R8          R80007
COLOCADA                                  R8          R80008
CENTRO                                    R8          R80009
COLOCADA                                  R8          R80010
COLOCADA                                  R8          R80011
CENTRO                                    R8          R80012
CAMINO REAL                               R8          R80013
AEROPUERTO (CENTRAL DE ABASTOS)           R8          R80014
PUERTO MORELOS                            R8          R80015
PLAYA DEL CARMEN                          R8          R80016
PUERTO AVENTURAS                          R8          R80017
COZUMEL                                   R8          R80018
</TABLE>

                                       6
<PAGE>

<TABLE>
<CAPTION>
                           IDENTIFICACION
         NOMBRE DEL SITIO              REGION         No ID
<S>                                    <C>            <C>
CIUDAD DEL CARMEN                         R8          R80019
COLOCADA                                  R8          R80020
CAMINO REAL                               R8          R80021
CARDENAS                                  R8          R80022
ZONA INDUSTRIAL (CIUDAD INDUSTRIAL)       R8          R80023
VILLAHERMOSA III (CENTRO                  R8          R80024
VILLAHERMOSA)
PLATANO Y CACAO                           R8          R80025
COMALCALCO                                R8          R80026
LA VENTA                                  R8          R80027
MACUSPANA (MACUSTIANA)                    R8          R80028
TEAPA                                     R8          R80029
EMILIANO ZAPATA                           R8          R80030
PALENQUE                                  R8          R80031
COLOCADA                                  R8          R80032
TERAN                                     R8          R80033
SAN CRISTOBAL                             R8          R80034
COMITAN                                   R8          R80035
COLOCADA                                  R8          R80036
CENTRO (TAPACHULA)                        R8          R80037
TULIPANES                                 R8          R80038
LOS LAURELES                              R8          R80039
TONALA                                    R8          R80040
SAN BENITO (REPET)                        R8          R80041
BACALAR                                   R8          R80042
HUITEPEC                                  R8          R80043
LA FLORECILLA                             R8          R80044
CD. HIDALGO                               R8          R80045
CENTRO DE CONVENCIONES (MONTES DE         R8          R80048
AME)
MONTEBELLO                                R8          R80049
TUXTLA GUTIERREZ CENTRO                   R8          R80050
SAN BENITO                                R8          R80052
CD. INDUSTRIAL                            R8          R80053
REGIONES SUR                              R8          R80054
ISLA MUJERES                              R8          R80055
COZUMEL NORTE                             R8          R80056
</TABLE>

                                       7
<PAGE>

<TABLE>
<CAPTION>
                           IDENTIFICACION
        NOMBRE DEL SITIO               REGION         No ID
<S>                                    <C>            <C>
CIUDAD DEL CARMEN II                      R8          R80057
PINOS                                     R8          R80058
FRANCISCO I. MADERO                       R8          R80059
AHUEHUETES                                R9          R90001
AJUSCO                                    R9          R90002
ALAMEDA                                   R9          R90003
ALENCASTRE                                R9          R90004
ALTAVISTA                                 R9          R90005
ALVARO OBREGON                            R9          R90006
ARAGON                                    R9          R90007
ARQUIMEDES                                R9          R90008
ATENCO                                    R9          R90009
AXOTLA                                    R9          R90010
BALCONES                                  R9          R90011
BARROCO                                   R9          R90012
BENITO JUAREZ                             R9          R90013
BOSQUES DEL LAGO                          R9          R90014
BUENAVISTA (Switch Toluca)                R9          R90015
CALLE 10                                  R9          R90016
CAMINO REAL                               R9          R90017
CAMPOS ELISEOS                            R9          R90018
CENTRO COMERCIAL SANTA FE                 R9          R90019
COACALCO (switch)                         R9          R90020
CHILPANCINGO (PLAZA CONDESA)              R9          R90021
(CHIHUAHUA)
FELIX CUEVAS                              R9          R90022
FUENTES II (PERISUR)                      R9          R90023
GANDHI                                    R9          R90024
GUSTAVO BAZ                               R9          R90025
HIPODROMO                                 R9          R90026
</TABLE>

                                       8
<PAGE>

<TABLE>
<CAPTION>
                           IDENTIFICACION
       NOMBRE DEL SITIO                REGION         No ID
<S>                                    <C>            <C>
HORACIO REUB.                             R9          R90027
JOCOTITLAN                                R9          R90028
LAGO SUR                                  R9          R90029
L O M A S (HERRADURA)                     R9          R90030
LOMAS ALTAS                               R9          R90031
LORETO                                    R9          R90032
LOS GALLOS                                R9          R90033
MANACAR                                   R9          R90034
MARRIOT  HOTEL                            R9          R90035
MELCHOR OCAMPO                            R9          R90036
MONTES URALES                             R9          R90037
NARVARTE                                  R9          R90038
NIKKO  HOTEL                              R9          R90039
OBRERA II                                 R9          R90040
PASTEJE (Switch LD)                       R9          R90041
PATRIOTISMO                               R9          R90042
PATRITOTISMO (MASTILES)                   R9          R90043
PELICANO                                  R9          R90044
PEROTE                                    R9          R90045
PLAZA SATELITE                            R9          R90046
PRADO NORTE                               R9          R90047
PRESA MADIN                               R9          R90048
PRIMERO DE MAYO (CHAMAPA)                 R9          R90049
RANCHO SAN FRANCISCO                      R9          R90050
REFORMA                                   R9          R90051
ROMA  REUB.                               R9          R90052
SAN COSME                                 R9          R90053
</TABLE>

                                       9
<PAGE>

<TABLE>
<CAPTION>
                           IDENTIFICACION
       NOMBRE DEL SITIO                REGION         No ID
<S>                                    <C>            <C>
SANTA FE CORPORATIVO                      R9          R90054
SANTA  FE I                               R9          R90055
SEDESOL                                   R9          R90056
TELEVISA                                  R9          R90057
TEPEPAN                                   R9          R90058
TOLUCA                                    R9          R90059
TLALNEPANTLA (switch Ceylan)              R9          R90060
VALLE ESCONDIDO                           R9          R90061
VILLA COYOACAN                            R9          R90062
ZACATEPETL                                R9          R90063
ZONA ROSA II (TROCADERO)                  R9          R90064
CHILUCA                                   R9          R90065
BOSQUE REAL                               R9          R90066
PACHUCA                                   R9          R90067
CHIQUIHUITE (Rep Mw)                      R9          R90068
HOSPITAL INGLES ABC (Indoor)              R9          R90069
CAMARA DE SENADORES(Indoor)               R9          R90070
CORONA                                    R9          R90071
HERBERTZ                                  R9          R90072
CANIETI (Indoor)                          R9          R90073
PLAZA INN(Indoor)                         R9          R90074
VIRREYES                                  R9          R90075
TARAHUMARA                                R9          R90076
JARDIN                                    R9          R90077
3 ORIENTE                                 R9          R90078
OCOTE (Indoor)                            R9          R90079
PROGRESO INDUSTRIAL                       R9          R90080
HACIENDA PASTEJE (Indoor)                 R9          R90081
</TABLE>

                                       10
<PAGE>

<TABLE>
<CAPTION>
                           IDENTIFICACION
       NOMBRE DEL SITIO                REGION         No ID
<S>                                    <C>            <C>
TATAVASCO (Indoor)                        R9          R90082
SRE(Indoor)                               R9          R90083
CSI PLAZA CUERNAVACA (Indoor)             R9          R90084
LAURELES (Indoor)                         R9          R90085
CANTIL(Indoor)                            R9          R90086
UNIVERSIDAD DEL FUTBOL                    R9          R90087
PALACIO LEGISLATIVO                       R9          R90304
CLUB DE GOLF BOSQUES                      R9          R90319
PANTEON JARDIN                            R9          R90320
</TABLE>

                                       11
<PAGE>

                                   SCHEDULE 2

                                    HUB SITES

<TABLE>
<CAPTION>
                          IDENTIFICACION

         NOMBRE DEL SITIO                REGION          NO ID
<S>                                      <C>             <C>
SWITCHES
BUENOS AIRES                               R4            R40001
CANADA                                     R5            R50001
CORPORATIVO                                R6            R60011
CALERA  (SWITCH) (COUBIC. TELMEX-          R7            R70002
PROPIO)

COLOCADA, MERIDA                           R8            R80001
BUENAVISTA (SWITCH TOLUCA)                 R9            R90015
PASTEJE   (SWITCH LD)                      R9            R90041
TLALNEPANTLA (SWITCH)                      R9            R90060

NODOS DE FIBRAS OPTICAS
IUSATEL                                    R4            R40004
PROVIDENCIA                                R5            R50004
LADRON DE GUEVARA                          R5            R50009
CHAPULTEPEC                                R5            R50013
SAN PABLO                                  R6            R60001
BUGAMBILIAS                                R6            R60007
HUEXOTITLA                                 R7            R70008
TELEREUNION VERACRUZ                       R7            R70027
COLOCADA, CAN CUN                          R8            R80011
CIUDAD DEL CARMEN                          R8            R80019
COLOCADA, VILLAHERMOSA                     R8            R80020
EMILIANO ZAPATA                            R8            R80030
COLOCADA                                   R8            R80032
ALVARO OBREGON                             R9            R90006
ATENCO                                     R9            R90009
BENITO JUAREZ                              R9            R90013
FELIX CUEVAS                               R9            R90022
HORACIO REUB.                              R9            R90027
PATRIOTISMO                                R9            R90042
PATRITOTISMO (MASTILES)                    R9            R90043
SAN COSME                                  R9            R90053
SANTA FE CORPORATIVO                       R9            R90054
SANTA  FE I                                R9            R90055
TEPEPAN                                    R9            R90058
</TABLE>

                                        1
<PAGE>

                                   SCHEDULE 3

                                  INITIAL SITES

<TABLE>
<CAPTION>
<S>     <C>                             <C>       <C>
1       DESHUESADERO (LA GLORIA)        R1        R10003
2       TELEVISA                        R9        R90057
3       CHILPANCINGO (PLAZA             R9        R90021
        CONDESA) (CHIHUAHUA)

4       MANACAR                         R9        R90034
5       NUEVO VALLARTA                  R5        R50015
6       PUNTA SANTIAGO                  R5        R50021
7       CORPORATIVO                     R6        R60011
8       SAN JOSE ITURBIDE               R6        R60010
9       VERACRUZ CENTRO (COSTERA)       R7        R70019
10      TEZOYUCA (REP. ESPERANZA)       R7        R70026
11      CHAPULTEPEC                     R5        R50013
12      AEROPUERTO (CENTRAL DE          R8        R80014
        ABASTOS)
13      PUERTO MORELOS                  R8        R80015
14      ATENCO                          R9        R90009
15      LOS GALLOS                      R9        R90033
16      VILLA COYOACAN                  R9        R90062
17      ALVARO OBREGON                  R9        R90006
18      ARQUIMEDES                      R9        R90008
19      FUENTES II (PERISUR)            R9        R90023
20      HORACIO REUB.                   R9        R90027
21      PLAZA SATELITE                  R9        R90046
22      PRESA MADIN                     R9        R90048
23      CHILUCA                         R9        R90065
24      COLOCADA                        R8        R80011
25      CENTRO                          R8        R80012
26      PLAYA DEL CARMEN                R8        R80016
27      PUERTO AVENTURAS                R8        R80017
28      COZUMEL                         R8        R80018
29      COZUMEL NORTE                   R8        R80056
30      COLOCADA (Switch Merida)        R8        R80001
31      MONTEJO                         R8        R80002
32      CENTRO                          R8        R80004
</TABLE>

                                        1
<PAGE>

<TABLE>
<S>     <C>                             <C>       <C>
33      AEROPUERTO                      R8        R80005
34      PLAZA DORADA                    R8        R80006
</TABLE>

                                        2
<PAGE>

                                  SCHEDULE 3.3
                                SELLER APPROVALS

                                       1
<PAGE>

                                 SCHEDULE 3.4(b)

                               LIST OF OWNED LAND

<TABLE>
<CAPTION>
                                                                                                   Legal Description is
                                                                                                   attached here and marked
Site Number         Site Name             County & State            Deed Book & Page Number        as:
<S>                 <C>                   <C>                       <C>                            <C>
                                                                                                   Attachment 3-___
                                                                                                   Attachment 3-___
                                                                                                   Attachment 3-___
                                                                                                   Attachment 3-___
</TABLE>

                                       1
<PAGE>

                                 SCHEDULE 3.4(c)
                               LIST OF LAND LEASES

<TABLE>
<CAPTION>
                                                                                                       EXPIRATION
                                                                                                       DATE AND
          SITE     DESCRIPTION OF    MONTHLY      RENT          SUBLEASING      RENT COMMENCEMENT      RENEWAL         SECURITY
SITE NO.  NAME     LEASE             RENT         ESCALATOR     RESTRICTIONS    DATE                   OPTIONS         DEPOSITS
-------------------------------------------------------------------------------------------------------------------------------
<S>       <C>      <C>               <C>          <C>           <C>             <C>                    <C>             <C>

-------------------------------------------------------------------------------------------------------------------------------

-------------------------------------------------------------------------------------------------------------------------------

-------------------------------------------------------------------------------------------------------------------------------

-------------------------------------------------------------------------------------------------------------------------------

-------------------------------------------------------------------------------------------------------------------------------

-------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                       1
<PAGE>

                                 SCHEDULE 3.4(d)
                                  ENCUMBRANCES

                                       1
<PAGE>

                                 SCHEDULE 3.4(e)
                        REQUIRED REPAIRS AND MAINTENANCE

                                       1
<PAGE>

                                 SCHEDULE 3.4(f)
                            LIST OF RELATED CONTRACTS

                                       1
<PAGE>

                                 SCHEDULE 3.4(g)
                              LIST OF TENANT LEASES

<TABLE>
<CAPTION>
                                                                 TERMINATION
                                                                 RIGHTS (OTHER                           EXPIRATION
                                                     MONTHLY     THAN DUE TO                             DATE AND
          SITE      TENANT          DESCRIPTION      RENT  &     BREACH OR        RENT COMMENCEMENT      RENEWAL         SECURITY
SITE NO.  NAME      NAME             OF LEASE        ESCALATOR   DAMAGE)          DATE                   OPTIONS         DEPOSITS
------------------------------------------------------------------------------------------------------------------------------------
<S>       <C>       <C>             <C>              <C>         <C>              <C>                    <C>             <C>
------------------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                       1
<PAGE>

                                SCHEDULE 3.10(a)
                              SELLER AUTHORIZATIONS

                                       1
<PAGE>

                                SCHEDULE 3.10(b)
                                   VIOLATIONS

                                       1
<PAGE>

                                  SCHEDULE 3.11
                               SELLERS'INSURANCE

                                       1
<PAGE>

                                  SCHEDULE 4.4
                                     BROKERS

                                       1
<PAGE>

                                  SCHEDULE 4.5
                              BUYER AUTHORIZATIONS

                                      None

<PAGE>

                                   SCHEDULE 16
                                 EXCLUDED ASSETS

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00068-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00068-of-00352.parquet"}]]