Document:

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                                                                   EXHIBIT 10.50

                 AMENDED AND RESTATED INTERIM FUNDING AGREEMENT

                                  by and among

                 PEGASO COMUNICACIONES Y SISTEMAS, S.A. DE C.V.,

                    THE OTHER MEMBERS OF THE BORROWER GROUP,

                              QUALCOMM INCORPORATED

                                       and

                                 ELECTRO BANQUE

                 and Consented and Agreed to and Acknowledged by

                    TELEFONAKTIEBOLAGET L.M. ERICSSON (PUBL),

                               ABN AMRO BANK N.V.,

                                     ALCATEL

                                       and

                                 ELECTRO BANQUE,
                       as Facility 2 Administrative Agent

                           Dated as of April 26, 2002

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                               TABLE OF CONTENTS

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<S>         <C>                                                                 <C>
Section 1.   Definitions and Rules of Interpretation .............................2

Section 2.   The Credits and General Provisions Regarding the Special Loans ......6

Section 3.   Conditions Precedent ...............................................12

Section 4.   Conditional Waiver .................................................16

Section 5.   Covenants of Borrower ..............................................17

Section 6.   Representations and Warranties .....................................18

Section 7.   Events of Default ..................................................19

Section 8.   Miscellaneous ......................................................19

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EXHIBITS AND SCHEDULES

Exhibit A-1    Form of Interim Loan Pagare

Exhibit A-2    Form of Backstop Fee Loan Pagare

Exhibit A-3    Form of Additional Interim Loan Pagare

Exhibit B      Interim Business Plan

Exhibit C-1    [Intentionally Omitted]

Exhibit C-2    [Intentionally Omitted]

Exhibit C-3    Form of Second QUALCOMM Forbearance Agreement

Exhibit C-4    Form of Second Vendor Parties Forbearance Agreement

Exhibit D      Form of Sales Transaction Proceeds Allocation Agreement

Exhibit E      Form of Borrower Group Release

Exhibit F-1    Form of stock option agreement for the initial Interim Loan

Exhibit F-2    Form of stock option agreement for the initial Interim Loan
               (Spanish translation)

Exhibit F-3    Form of stock option agreement for Additional Interim Loans

Exhibit F-4    Form of stock option agreement for Additional Interim Loans
               (Spanish translation)

Exhibit G      Form of Loan Request

Exhibit G-1    Form of Loan Request pursuant to Tranche B Commitment

Exhibit H      [Intentionally Omitted]

Exhibit I      Form of Amended and Restated Shareholders' Agreement

Exhibit J      Form of Amendment No. 2 to the Collateral Agency Agreement

Exhibit K      Form of Amendment No. 2 to the Intercreditor Agreement

Exhibit L      Form of Notice and Request for Amendments and Waivers Letter

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Exhibit M-1  Form of Opinion of Fried Frank Harris Shriver & Jacobson,
             special New York counsel to Borrower, for the initial Interim Loan

Exhibit M-2  Form of Opinion of Mijares, Angoitia, Cortes y Fuentes, S.C.,
             Mexico counsel to Borrower, for the initial Interim Loan

Exhibit M-3  Form of Opinion of Fried Frank Harris Shriver & Jacobson, special
             New York counsel to Borrower, for the initial Additional Interim
             Loan

Exhibit M-4  Form of Opinion of Mijares, Angoitia, Cortes y Fuentes, S.C.,
             Mexico counsel to Borrower, for the initial Additional Interim Loan

Exhibit N    Form of Amendment No. 4 to the QUALCOMM Credit Agreement

Exhibit O    Form of Amendment No. 5 to QUALCOMM Credit Agreement

Exhibit P    Form of Amendment No. 1 to Electro Banque Facility 2 Credit
             Agreement

Schedule 1   List of Guarantees and Counter-Guarantees that Require Confirmation

Schedule 2   Drawdown Schedule

Schedule 3   Regulatory Approvals

Schedule 4   Additional Interim Loans Availability Schedule

                                       ii
<PAGE>

                 AMENDED AND RESTATED INTERIM FUNDING AGREEMENT

            This AMENDED AND RESTATED INTERIM FUNDING AGREEMENT, dated as of
April 26, 2002 (this "Agreement"), is entered into by and among PEGASO
COMUNICACIONES Y SISTEMAS, S.A. DE C.V., a sociedad anonima de capital variable
organized under the laws of Mexico ("Borrower"), the other members of the
Borrower Group, QUALCOMM INCORPORATED, a corporation organized under the laws of
the State of Delaware ("OUALCOMM"), and ELECTRO BANQUE, a financial institution
organized under the laws of France, its capacity as a lender under the Electro
Banque Facility 2 Credit Agreement (in such capacity, "Electro Banque"); and
consented and agreed to and acknowledged, with respect to the provisions set
forth in Section 4, by TELEFONAKTIEBOLAGET L.M. ERICSSON (PUBL), a limited
liability company organized under the laws of Sweden ("Ericsson", together with
QUALCOMM the "Lenders" under the Credit Agreement (as defined below)), ABN AMRO
BANK N.V., as administrative agent for the Lenders (the "Administrative Agent"),
ALCATEL, a corporation duly incorporated under the laws of France ("Alcatel"),
and ELECTRO BANQUE, in its capacity as administrative agent for the lenders
party to the Electro Banque Facility 2 Credit Agreement (in such capacity, the
"Facility 2 Administrative Agent").

                                    RECITALS

            A. Borrower has entered into an Interim Funding Agreement, dated as
of January 16, 2002, among Borrower, the other members of the Borrower Group,
QUALCOMM, Ericsson, the Administrative Agent and Alcatel, pursuant to which
QUALCOMM has advanced Facility-2 Loans under the Credit Agreement (as defined
below) to finance the payment of minimum working capital expenditures of
Borrower in accordance with the Interim Business Plan (as defined below), which
Interim Funding Agreement is amended and restated by this Agreement.

            B. Borrower has entered into an Amended and Restated Credit
Agreement, dated as of December 15, 1998, by and among Borrower, QUALCOMM, the
Lenders and the Administrative Agent, as amended by Amendment No. 1 to Amended
and Restated Credit Agreement, dated as of May 27, 1999, Amendment No. 2 to
Amended and Restated Credit Agreement, dated as of November 28, 2000, Amendment
No. 3 to Amended and Restated Credit Agreement, dated as of October 10, 2001,
and Amendment No. 4 to Amended and Restated Credit Agreement, dated as of
January 16, 2002 (as so amended and as otherwise amended, supplemented,
modified or restated from time to time, the "Credit Agreement").

            C. Borrower has requested QUALCOMM to amend the Credit Agreement in
order to provide Additional Interim Loans (as defined below) under the Credit
Agreement to finance the payment of working capital expenditures of Borrower in
accordance with the Business Plan (as defined below) subject to the terms and
conditions of the Credit Agreement and this Agreement, and QUALCOMM is willing
to provide such Additional Interim Loans from its unused Facility-2 Commitment
subject to the terms and conditions and in reliance on the representations and
warranties set forth in this Agreement.

            D. Borrower has entered into a Credit Agreement, dated as of October
10, 2001, by and among Borrower, the lenders party thereto and the Facility 2
Administrative Agent

                                      -1-
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(as amended, supplemented, modified or restated from time to time, the "Electro
Banque Facility 2 Credit Agreement").

            E. Borrower has requested Electro Banque to amend the Electro Banque
Facility 2 Credit Agreement in order to provide Additional Interim Loans under
the Tranche B Term Facility (as defined below) to finance the payment of working
capital expenditures of Borrower in accordance with the Business Plan subject to
the terms and conditions of the Electro Banque Facility 2 Credit Agreement and
this Agreement, and Electro Banque is willing to provide such Additional Interim
Loans from its unused Tranche B Commitment (as defined below) subject to the
terms and conditions and in reliance on the representations and warranties set
forth in this Agreement.

            F. QUALCOMM and Electro Banque have agreed to enter into a
Participation Agreement, which will be acknowledged by Borrower, whereby
QUALCOMM will purchase from Electro Banque, and Electro Banque will sell to
QUALCOMM a participation in the Additional Interim Loans made by Electro Banque
from its unused Tranche B Commitment pursuant to the Electro Banque Facility 2
Credit Agreement and this Agreement (as amended, supplemented, modified or
restated from time to time, the "Participation Agreement").

            G. Borrower has entered into a Common Agreement, dated as of
December 15, 1998, as the same has been and hereinafter may be amended,
supplemented, modified or restated from time to time, among Borrower, the other
members of the Borrower Group, the Alcatel Administrative Agent, the QUALCOMM
Administrative Agent, the Facility 2 Administrative Agent, the Intercreditor
Agent and the Collateral Agent (as amended, supplemented, modified or restated
from time to time, the "Common Agreement").

            H. Holdings is entering into the Definitive Agreement (as defined
below) among Holdings, Holdings' shareholders, TEM (as defined below), and
certain other parties named therein, pursuant to which TEM has agreed to
purchase the capital stock of certain of the shareholders of Holdings in
accordance with the terms and conditions of the Definitive Agreement.

            NOW, THEREFORE, in consideration of the foregoing, the mutual
covenants and agreements set forth below and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties agree as follows:

        Section 1. Definitions and Rules of Interpretation.

                   (a) Definitions. Capitalized terms used and not otherwise
defined in this Agreement shall have the meanings given to them in the Credit
Agreement or, if not defined therein or herein, the Common Agreement. In
addition, as used in this Agreement, the following terms shall have the
following meanings:

        "Additional Interim Loan Commitment" has the meaning set forth in
Section 2.3(a).

        "Additional Interim Loan Funding Closing Date" means the date that all
the conditions precedent set forth in Section 3.2 are satisfied (or waived by
QUALCOMM in its sole discretion).

                                      -2-
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       "Additional Interim Loan Pagare" means the promissory note in the form of
Exhibit A-3 to be delivered for each Borrowing of Additional Interim Loans.

       "Additional Interim Loans" means the Special Loans made, or caused to be
made, by QUALCOMM pursuant to Section 2.3.

        "Additional Interim Loans Availability Schedule" means the monthly
 availability schedule of Additional Interim Loans as set forth in Schedule 4.

        "Additional Interim Operating Plan" has the meaning assigned to such
 term in the Definitive Agreement.

        "Additional Financing Facility Loans" has the meaning set forth in
Section 2.1(b).

        "Amended and Restated Shareholders' Agreement" means the Amended and
Restated Shareholders' Agreement in the form of Exhibit I.

        "Approved Sale Transaction" has the meaning assigned to such term in the
Amended and Restated Shareholders' Agreement.

        "Backstop Fee" has the meaning set forth in Section 5.1(d).

        "Backstop Fee Loan" has the meaning set forth in Section 2.4.

        "Backstop Fee Loan Pagare" means the promissory note in the form of
Exhibit A-2 to be delivered for the Borrowing of the Backstop Fee Loan.

        "Borrowing" means a borrowing or advance of credit pursuant to the terms
and conditions of this Agreement.

        "Business Plan" has the meaning assigned to such term in the Definitive
Agreement.

        "Buyer" has the meaning assigned to such term in the Sale Transaction
Proceeds Allocation Agreement.

        "Capital Expenditures" means, for any period, consistent with U.S. GAAP,
expenditures (including amounts expended in connection with capitalization of
leases) made by Borrower to acquire or construct and maintain or repair (to the
extent that such maintenance or repair have been capitalized) fixed assets,
plant and equipment (including renewals, improvements and replacements, but
excluding repairs in the ordinary course) during such period.

        "Closing" has the meaning assigned to such term in the Definitive
Agreement.

        "Closing Date" means the date that all the conditions precedent set
forth in Section 3.1 are satisfied (or waived by QUALCOMM in its sole
discretion).

        "CNIE" means the Comision Nacional de Inversiones Extranjeras of Mexico.

        "COFETEL" means the Comision Federal de Telecomunicaciones of Mexico.

                                      -3-
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       "Covered Bride Default" has the meaning assigned to such term in the
Second QUALCOMM Forbearance Agreement.

        "Covered Default" means a Covered Bridge Default or a Covered Vendor
Facility Default.

        "Covered Vendor Facility Default" has the meaning assigned to such term
in the Second Vendor Parties Forbearance Agreement.

        "Definitive Agreement" means the Stock Purchase Agreement to be entered
into by and among TEM, the Borrower, the other members of the Borrower Group,
Alejandro Burillo Azcarraga, Carmela Azcarraga Milmo, Scotiabank Inverlat, S.A.,
Institucion de Banca Multiple, Grupo Financiero Scotiabank Inverlat, as trustee
of trust No. 101814, Leap PCS Mexico, Inc., Leap Wireless International, Inc.,
International Equity Investments, Inc., NI Media Equity, LLC, LAIF X SPRL,
QUALCOMM, Sprint Mexico, Inc., Sprint Corporation, Alcatel and Ericsson,
pursuant to which TEM shall purchase from certain of the shareholders of
Holdings all the capital stock of Holdings owned by such shareholders in
accordance with the terms and conditions thereof.

        "Dollars" or "$" shall mean the lawful currency of the United States.

        "Drawdown Schedule" means the anticipated disbursement schedule of
Interim Loans determined in accordance with the Interim Business Plan and set
forth in Schedule 2.

        "Financing Costs" means, for any period, consistent with U.S. GAAP, any
interest or other financing costs (including, without limitation, the interest
component of capitalized leases and the amortization of capitalized financing
costs) paid in such period by Borrower other than to Alcatel, Ericsson and
QUALCOMM or paid in such period by Borrower in the ordinary course of business
relating to trade payables.

        "Interim Business Plan" means the updated interim business plan dated as
of December 21, 2001, in form and substance satisfactory to QUALCOMM, covering
the Interim Business Plan Period and attached as Exhibit B to this Agreement.

        "Interim Business Plan Period" shall mean the period from December 1,
2001 through March 31, 2002.

        "Interim Loan" means the Special Loans made by QUALCOMM pursuant to
Section 2.2.

        "Interim Loan Commitment" has the meaning set forth in Section 2.2(a).

        "Interim Loan Pagare" means the promissory note in the form of Exhibit
A-1 to be delivered for each Borrowing of Interim Loans.

        "Loan Request" means a request for loans by Borrower in the form of
Exhibit G or Exhibit G-1, as appropriate, pursuant to Section 2.1(d).

                                      -4-
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       "Operating Costs" means, for any period, consistent with U.S. GAAP, (a)
reasonable and necessary expenses of administering and operating the Business
during such period, (b) insurance premium costs paid by any member of the
Borrower Group during such period, (c) property taxes payable by any member of
the Borrower Group during such period, (d) sales and excise taxes payable by any
member of the Borrower Group during such period (other than taxes imposed on or
measured by income or receipts), (e) costs and fees, including taxes and
royalties, if any, of maintaining the Licenses payable during such period, (f)
legal, accounting and other professional fees incurred during such period in
connection with any of the foregoing items or relating to a Sale Transaction or
this Agreement, (g) fees incurred during such period in connection with the
establishment, maintenance or administration of any accounts approved by
QUALCOMM, (h) repair and maintenance costs which are expensed (as opposed to
capitalized) by any member of the Borrower Group during such period, (i) lease
payments on non-capitalized leases paid by any member of the Borrower Group
during such period, and (j) depreciation and amortization (excluding
amortization of capitalized financing costs) payable during such period.

        "Process Agent" has the meaning set forth in Section 9(j).

        "Quarterly Date" means March 31, June 30, September 30 and December 31,
as applicable.

        "Sale Transaction" has the meaning assigned to that term in the Sale
Transaction Proceeds Allocation Agreement.

        "Sale Transaction Proceeds Allocation Agreement" means the Sale
Transaction Proceeds Allocation Agreement in the form of Exhibit D.

        "SCT" means the Secretaria de Comunicaciones y Transportes of Mexico.

        "Second OUALCOMM Forbearance Agreement" means the Forbearance Agreement
executed by QUALCOMM in the form of Exhibit C-3.

        "Second Vendor Parties Forbearance Agreement" means the Forbearance
Agreement executed by the Secured Parties in the form of Exhibit C-4.

        "Signing Date" means January 16, 2002.

        "Special Loan Commitments" means the Additional Interim Loan Commitment
and the Interim Loan Commitment.

        "Special Loan Scheduled Maturity Date" has the meaning set forth in
Section 2.2(b).

             "Special Loans" mean the Additional Interim Loans, the Backstop Fee
  Loan, the Interim Loans and the Additional Financing Facility Loans.

        "Sprint Agreements" means (i) the Operator Agreement, (ii) the
Technology and Know-how License Agreement, dated as of March 15, 2000, by and
between Holdings and Sprint Spectrum LP ("Sprint") and (iii) the Trademark
License Agreement, dated as of March 15,

                                      -5-
<PAGE>

2000, by and between Holdings and Sprint Communications Company L.P. each as
assigned by Holdings to Borrower.

        "Sprint Settlement Agreement" means the Termination, Settlement and
Mutual Release Agreement, in form and substance satisfactory to QUALCOMM, by and
among Borrower; the other members of the Borrower Group; Leap PCS Mexico, Inc.;
Alejandro Burillo Azcarraga; Carmela Azcarraga Milmo; Scotiabank Inverlat, S.A.,
Institucion de Banca Multiple, Grupo Financiero Scotiabank Inverlat, formerly
known as Banco Inverlat, S.A., Institucion de Banca Multiple, Grupo Financiero
Inverlat, as trustee of trust No. 101814; International Equity Investments,
Inc.; NI Media Equity, LLC; LAIF X SPRL; Sprint Spectrum L.P.; Sprint
Communications Company L.P.; Sprint Mexico, Inc.; and Sprint Corporation.

        "TEM" means Telefonica Moviles, S.A.

        "Tranche B Commitment" has the meaning assigned to such term in the
Electro Banque Facility 2 Credit Agreement.

        "Tranche B Term Facility" has the meaning assigned to such term in the
Electro Banque Facility 2 Credit Agreement.

        "Tranche B Loans" has the meaning assigned to such term in the Electro
Banque Facility 2 Credit Agreement.

        "Transaction Documents" means this Agreement, the Sale Transaction
Proceeds Allocation Agreement, the Amended and Restated Shareholders' Agreement,
and the other documents contemplated to be delivered pursuant to or as a
condition to this Agreement (other than the Definitive Agreement and the other
documents required to implement the Sale Transaction).

        "Working Capital" means, consistent with U.S. GAAP, current operating
assets and current operating liabilities of the Borrower Group (taken as a whole
without duplication), which shall include accounts receivable, taxes receivable,
accounts payable, taxes payable, inventories and pre-paid advertising, but
excluding cash and marketable securities.

                   (b) Rules of Interpretation. The rules of interpretation set
forth in Section 1.02 of the Common Agreement shall be applicable to this
Agreement, mutatis mutandis, as if set forth in this Agreement.

        Section 2. The Credits and General Provisions Regarding the Special
Loans.

               2.1 Borrowings Under the Credit Agreement.

                   (a) Borrowings Under OUALCOMM's FACILITY-2 Commitments.
Borrowings of Interim Loans and the Backstop Fee Loan (each as described below)
made by Borrower shall be funded by Borrowings of Facility-2 Loans under
QUALCOMM's unused Facility-2 Commitment existing under the Credit Agreement, and
all Borrower's obligations with respect to the Interim Loans and Backstop Fee
Loan shall be secured on a senior secured basis, pari passu with the existing
Senior Indebtedness. The parties shall cooperate to obtain all necessary
consents, waivers and approvals with respect to the Interim Loans and the
Backstop Fee Loan as set forth in greater detail in Section 3.1.

                                      -6-
<PAGE>

                    (b) Additional Interim Loan Facility, Additional Interim
Loans (as described below) shall be funded pursuant to (i) a new "Facility-3" to
be established in connection with an amendment to the Credit Agreement, (ii) in
the Facility 2 Administrative Agent's sole discretion, one or more amendments to
the Electro Banque Facility 2 Credit Agreement, (iii) in QUALCOMM's sole
discretion, one or more amendments to the Credit Agreement, or (iv) a new
Financing Agreement contemplated to be executed to fund Additional Interim Loans
and up to $40,000,000.00 (the "Additional Financing Facility Loans") required to
be provided by QUALCOMM under the Additional Financing Facility (as defined in
the Definitive Agreement) with such terms and provisions as set forth in the
Definitive Agreement, in each case, to be executed in connection with the other
conditions precedent set forth in Section 3.2 and all Borrower's obligations
with respect to the Additional Interim Loans shall be secured on a senior
secured basis, pari passu with the existing Senior Indebtedness. The parties
shall cooperate to obtain all necessary consents, waivers and approvals with
respect to the Additional Interim Loans as set forth in greater detail in
Section 3.2.

                   (c) Credit Agreement and Electro Banque Facility 2 Credit
Agreement Terms Incorporated by Reference.

            (i) All the terms and provisions with respect to Loans under the
Credit Agreement shall apply to the Special Loans made under this Agreement as
if set forth in this Agreement. Each Facility-2 Loan under the Credit Agreement
advanced as a Special Loan and all covenants applicable to Borrower with respect
to such Special Loans shall be subject to all the terms and conditions of the
Facility-2 Loans under the Credit Agreement except to the extent such terms and
conditions are expressly modified by this Agreement.

            (ii) All the terms and provisions with respect to Tranche B Loans
under the Electro Banque Facility 2 Credit Agreement shall apply to the
Additional Interim Loans made under this Agreement as if set forth in this
Agreement. Each Tranche B Loan under the Electro Banque Facility 2 Credit
Agreement advanced as an Additional Interim Loan and all covenants applicable to
Borrower with respect to such Additional Interim Loans shall be subject to all
the terms and conditions of the Tranche B Loans under the Electro Banque
Facility 2 Credit Agreement except to the extent such terms and conditions are
expressly modified by this Agreement.

                   (d) Request For Borrowings. To request a Special Loan,
Borrower shall notify QUALCOMM of such request by telephone not later than 11:00
a.m., San Diego time, at least five (5) Business Days before the date of the
proposed Borrowing which shall be consistent with the Drawdown Schedule or the
Additional Interim Loans Availability Schedule, as applicable. Each telephonic
loan request shall be irrevocable and shall be confirmed promptly by hand
delivery or facsimile of a written, signed Loan Request to (i) QUALCOMM in the
form of Exhibit G for Special Loans to be advanced from QUALCOMM's unused
Facility-2 Commitment, or (ii) QUALCOMM and Electro Banque in the form of
Exhibit G-1 for Additional Interim Loans to be advanced from Electro Banque's
unused Tranche B Commitment.

                   (e) Availability. On the date specified for the Borrowing in
the Loan Request, subject to the terms and conditions set forth in this
Agreement, QUALCOMM shall make the amount of the Special Loan available to
Borrower by depositing, or causing to be

                                      -7-
<PAGE>

deposited, the same in immediately available funds in the account of Borrower
set forth in the Loan Request. Borrowings of Interim Loans shall be permitted in
accordance with the Drawdown Schedule. Borrowings of Additional Interim Loans in
each monthly period shall be permitted up to the amounts set forth for such
relevant monthly period in the Additional Interim Loans Availability Schedule.
Additional Interim Loan amounts not funded in any monthly period shall be
carried over to the subsequent monthly period for availability under such
monthly period. QUALCOMM's obligation to make, or cause to be made, Special
Loans available to Borrower shall automatically end on the first to occur of (i)
the Closing under the Definitive Agreement, or (ii) prior to Closing under the
Definitive Agreement, the date that the Definitive Agreement is revoked,
rescinded or abandoned by any party thereto for any reason or terminated in
accordance with the terms thereof.

              2.2 The Interim Financing.

                   (a) Interim Loan Commitments. Subject to the terms and
conditions set forth in this Agreement, QUALCOMM agrees to make Interim Loans to
Borrower from time to time on or after the applicable conditions precedent in
Section 3 have been satisfied (or waived by QUALCOMM) in an aggregate amount up
to the lesser of (i) QUALCOMM's unused Facility-2 Commitment (which is
$96,000,000.00 as of the Signing Date) and (ii) $60,000,000.00 (the "Interim
Loan Commitment"). The Interim Loan Commitment is duplicative of, and not in
addition to, the Facility-2 Commitment, and utilization or reduction of one
shall automatically utilize or reduce the other. The repayment of Interim Loans
shall not reinstate the Interim Loan Commitment. Without limiting the other
provisions of the Credit Agreement applicable to QUALCOMM's Facility-2
Commitment, QUALCOMM's Facility-2 Commitment shall be automatically reinstated
in accordance with its terms to the extent that the Interim Loans are repaid by
Borrower on or before the Special Loan Scheduled Maturity Date; provided,
however, that if the Interim Loans are not repaid by the Special Loan Scheduled
Maturity Date, QUALCOMM's Facility-2 Commitment shall be reinstated upon the
repayment in full of all amounts due in respect of the Interim Loans on or
before the date that is thirty (30) days after the Special Loan Scheduled
Maturity Date, provided that the liquidated damages amounts payable by Borrower
under Section 2.05(a) of the Definitive Agreement are also paid in full when
due.

                   (b) Repayment of Interim Loans. The Interim Loans, together
with all accrued and unpaid interest thereon (subject to the provisions set
forth in Section 2.2(c)), shall be due and payable on the first to occur of (i)
the date that is thirty (30) days after the Closing under the Definitive
Agreement, or (ii) prior to Closing under the Definitive Agreement, the date
that the Definitive Agreement is revoked, rescinded or abandoned by any party
thereto for any reason or terminated in accordance with the terms thereof (the
"Special Loan Scheduled Maturity Date").

                   (c) Interest Rate Applicable to Interim Loans. Borrower shall
pay interest on the unpaid principal amount of each Interim Loan from the date
of the funding of such Interim Loan until such Interim Loan is paid at a fixed
rate equal to twelve percent (12%) per annum; provided, however, that if (i) the
Closing under the Definitive Agreement occurs and (ii) the Interim Loans are
timely repaid in accordance with Section 2.2(b), then the Interim Loans will be
deemed not to bear interest. In the event that such Interim Loan is not timely
repaid in accordance with Section 2.2(b), interest on such Interim Loan shall
accrue at a rate per annum equal to the Eurodollar Rate plus ten percent (10%)
and the per annum interest rate applicable to

                                      -8-
<PAGE>

such Interim Loans shall increase by one percent (1%) each month until such
Interim Loan and all accrued interest thereon has been paid in full; provided,
however, that the interest rate on such Interim Loans shall in no event exceed
twenty-two percent (22%) per annum. All interest under this Section 2.2(c) shall
be computed on the basis of a year of 360 days and the actual number of days
elapsed.

              2.3 The Additional Interim Financing.

                   (a) Additional Interim Loan Commitment. Subject to the terms
and conditions set forth in this Agreement, QUALCOMM agrees to make, or cause to
be made, Additional Interim Loans to Borrower from time to time after the
applicable conditions precedent in Section 3 have been satisfied (or waived by
QUALCOMM) in an aggregate amount up to $100,000,000.00 (the "Additional Interim
Loan Commitment"). The Additional Interim Loan Commitment is duplicative of, and
not in addition to, each of the Facility-2 Commitment and the Tranche B
Commitment and (i) utilization or reduction of the Additional Interim Loan
Commitment shall automatically utilize or reduce the Facility-2 Commitment or
the Tranche B Commitment, as applicable, and (ii) utilization or reduction of
either of the Facility-2 Commitment or the Tranche B Commitment from the date of
this Agreement shall automatically utilize or reduce the Additional Interim Loan
Commitment. For borrowings of Additional Interim Loans, Borrower shall utilize,
first, up to $31,000,000.00 from QUALCOMM's unused Facility-2 Commitment,
second, the unused Tranche B Commitment (which is $61,915,173.00 as of the date
of this Agreement) and, third, the other financing facilities contemplated to
fund Additional Interim Loans referenced in Section 2.1(b). The repayment of
Additional Interim Loans shall not reinstate the Additional Interim Loan
Commitment.

            Without limiting the other provisions of the Credit Agreement
applicable to the Facility-2 Commitment, the Facility-2 Commitment shall be
automatically reinstated in accordance with its terms to the extent that the
Additional Interim Loans funded from QUALCOMM's Facility-2 Commitment are repaid
by Borrower on or before the Special Loan Scheduled Maturity Date; provided,
however, that if the Additional Interim Loans are not repaid by the Special Loan
Scheduled Maturity Date, QUALCOMM's Facility-2 Commitment shall be reinstated
upon the repayment in full of all amounts due in respect of the Additional
Interim Loans on or before the date that is thirty (30) days after the Special
Loan Scheduled Maturity Date, provided that the liquidated damages amounts
payable by Borrower under Section 2.05(a) of the Definitive Agreement are also
paid in full when due.

            Without limiting the other provisions of the Electro Banque Facility
2 Credit Agreement applicable to the Tranche B Commitment not used to disburse
Additional Interim Loans, the Tranche B Commitment shall be automatically
reinstated in accordance with its terms to the extent that the Additional
Interim Loans funded from the Tranche B Commitment are repaid by Borrower on or
before the Special Loan Scheduled Maturity Date; provided, however, that if
the Additional Interim Loans are not repaid by the Special Loan Scheduled
Maturity Date, Tranche B Commitment shall be reinstated upon the repayment in
full of all amounts due in respect of the Additional Interim Loans on or before
the date that is thirty (30) days after the Special Loan Scheduled Maturity
Date, provided that the liquidated damages amounts payable by Borrower under
Section 2.05(a) of the Definitive Agreement are also paid in full when due.

                                      -9-
<PAGE>

                   (b) Repayment of Additional Interim Loans. The Additional
Interim Loans, together with all accrued and unpaid interest (subject to the
provisions set forth in Section 2.3(c)), shall be due and payable on the Special
Loan Scheduled Maturity Date. Any repayment of Additional Interim Loans shall be
allocated, first, to payment in full of all Additional Interim Loans advanced
from Electro Banque's Tranche B Commitment (including all accrued and unpaid
interest thereon), second, to payment in full of all Additional Interim Loans
advanced from QUALCOMM's Facility-2 Commitment (including all accrued and unpaid
interest thereon) and, third, to payment in full of all Additional Interim Loans
advanced from the other financing facilities contemplated to fund Additional
Interim Loans referenced in Section 2.1(b).

                   (c) Interest Rate Applicable to Additional Interim Loans.
Borrower shall pay interest on the unpaid principal amount of each Additional
Interim Loan from the date of the funding of such Additional Interim Loan until
such Additional Interim Loan is repaid at a fixed rate equal to twelve percent
(12%) per annum; provided, however, that if (i) the Closing under the Definitive
Agreement occurs and (ii) the Additional Interim Loans are timely repaid in
accordance with Section 2.3(b), then the Additional Interim Loans will have been
deemed to bear interest at a rate applicable for a Eurodollar Rate with a
three-month Interest Period, which Eurodollar Rate shall have been selected on
the previous Quarterly Date, or if such Quarterly Date is not a Business Day,
the immediately preceding Business Day. In the event that such Additional
Interim Loan is not timely repaid in accordance with Section 2.3(b), interest on
such Additional Interim Loan shall accrue at a rate per annum equal to the
Eurodollar Rate plus ten percent (10%) and the per annum interest rate
applicable to such Additional Interim Loans shall increase by one percent (1%)
each month until such Additional Interim Loan and all accrued interest thereon
has been paid in full; provided, however, that the interest rate on such
Additional Interim Loans shall in no event exceed twenty-two percent (22%) per
annum. All interest under this Section 2.3(c) shall be computed on the basis of
a year of 360 days and the actual number of days elapsed.

               2.4 Backstop Fee Financing.

                   (a) Backstop Fee Loan Commitment. Upon the satisfaction of
the conditions precedent set forth in Sections 3.1 and 3.3, QUALCOMM shall have
been deemed to have made a Facility-2 Loan under the Credit Agreement in the
amount of $5,000,000.00 (the "Backstop Fee Loan") pursuant to the terms and
conditions of the Credit Agreement. Upon receipt of the duly executed Backstop
Fee Loan Pagare from Borrower, if requested from Borrower, QUALCOMM shall
deliver to Borrower a written acknowledgment that the Backstop Fee has been
paid. QUALCOMM's commitment under this Section 2.4(a) to make the Backstop Fee
Loan is duplicative of, and not in addition to, the Facility-2 Commitment, and
utilization or reduction of one shall automatically utilize or reduce the other.
The Facility-2 Commitments of QUALCOMM shall be automatically reinstated in
accordance with their terms to the extent that such Backstop Fee Loan is repaid
by Borrower on or before the Special Loan Scheduled Maturity Date; provided,
however, that if the Backstop Fee Loans are not repaid by the Special Loan
Scheduled Maturity Date, QUALCOMM's Facility-2 Commitment shall be reinstated
upon the repayment in full of all amounts due in respect of the Additional
Interim Loans on or before the date that is thirty (30) days after the Special
Loan Scheduled Maturity Date, provided that the liquidated damages amounts
payable by Borrower under Section 2.05(a) of the Definitive Agreement are also
paid in full when due.

                                      -10-
<PAGE>

                   (b) Repayment of Backstop Fee Loan. The Backstop Fee Loan,
together with all accrued and unpaid interest (subject to the provisions set
forth in Section 2.4(c)), shall be due and payable on the Special Loan Scheduled
Maturity Date.

                   (c) Interest Rate Applicable to Backstop Fee Loan. Borrower
shall pay interest on the unpaid principal amount of the Backstop Fee Loan from
the date of the funding of the Backstop Fee Loan until such Backstop Fee Loan is
repaid at a fixed rate equal to twelve percent (12%) per annum; provided,
however, that if (i) the Closing under the Definitive Agreement occurs and (ii)
the Backstop Fee Loan is timely repaid in accordance with Section 2.4(b), then
the Backstop Fee Loan will be deemed not to bear interest. In the event that
such Backstop Fee Loan is not timely repaid in accordance with Section 2.4(b),
interest on such Backstop Fee Loan shall accrue at a rate per annum equal to the
Eurodollar Rate plus ten percent (10%) and the per annum interest rate
applicable to such Backstop Fee Loans shall increase by one percent (1%) each
month until such Backstop Fee Loan and all accrued interest thereon has been
paid in full; provided, however, that the interest rate on such Backstop Fee
Loans shall in no event exceed twenty-two percent (22%) per annum. All interest
under this Section 2.4(c) shall be computed on the basis of a year of 360 days
and the actual number of days elapsed.

            2.5 Participations. QUALCOMM may, without the consent of Borrower,
sell participations to one or more shareholders (or their affiliates) of
Holdings (each, a "Participant") in all or a portion of QUALCOMM's rights and
obligations under this Agreement and the Pagares (including all or a portion of
its Interim Loan Commitment and its Additional Interim Loan Commitment and the
Special Loans owing to it); provided that (a) each such Participant shall
participate in the Interim Loans (and the Interim Loan Commitment) and the
Additional Interim Loans (and the Additional Interim Loan Commitment) in a
minimum percentage amount equal to its percentage ownership interest in Holdings
and (b) QUALCOMM shall enter into a participation agreement with each
Participant. The participation agreement shall provide that QUALCOMM shall
retain the sole right to enforce this Agreement and the Credit Agreement and to
approve any amendment, modification or waiver of any provision of this Agreement
and the Credit Agreement except as expressly set forth in the participation
agreement; provided that such agreement or instrument may provide that QUALCOMM
will not, without the consent of the Participant, agree to a reduction of the
principal of or interest rate applicable to Special Loans in which such
Participant has an interest or the extension of the Special Loan Scheduled
Maturity Date of any Special Loans in which such Participant has an interest.

            2.6 Termination of the Special Loan Commitments. The Special Loan
Commitments and QUALCOMM's obligations to make, or cause to be made, Special
Loans thereunder shall terminate upon the occurrence of any of the following:

                   (a) Event of Default. An Event of Default (other than a
Covered Vendor Facility Default) shall occur under the Financing Agreements or
the Security Documents or a Bridge Event of Default (other than a Covered Bridge
Default) shall occur under the Bridge Financing Agreements or the Bridge
Security Documents.

                   (b) Material Adverse Effect. An event or condition shall
occur on or after the Signing Date that has or could reasonably be expected to
result in a Material Adverse Effect and QUALCOMM has provided notice to Borrower
that a Material Adverse Effect exists.

                                      -11-
<PAGE>

                   (c) Failure to Achieve Conditions Precedent by a Date
Certain. The Interim Loan Commitment shall terminate without any further action
on the part of QUALCOMM if the Closing Date has not occurred on or before
January 31, 2002. The Additional Interim Loan Commitment shall terminate if (i)
without any further action on the part of QUALCOMM, the Additional Interim Loan
Funding Closing Date has not occurred on or before May 31, 2002 unless otherwise
waived in writing by QUALCOMM in its sole discretion, or (ii) the Definitive
Agreement is, prior to Closing thereunder, revoked, rescinded or abandoned by
any party thereto for any reason or terminated in accordance with the terms
thereof and QUALCOMM gives notice to that effect to Borrower.

                   (d) Termination of Facility-2 Commitment and Tranche B
Commitment. A termination of the Special Loan Commitments pursuant to Sections
2.6(a), (b) or (c), of this Agreement shall not constitute an automatic
termination of the Facility-2 Commitment or the Tranche B Commitment.

            2.7 Liquidated Damages. If Closing under the Definitive Agreement
occurs and the Special Loans are not repaid in full on or before the Special
Loan Scheduled Maturity Date, the liquidated damages provision with respect to
such late payment set forth in Section 2.05(a) of the Definitive Agreement shall
supersede Sections 2.2(c), 2.3(c) and 2.4(c) of this Agreement and shall apply
to the unpaid Special Loans. Section 2.05(a) of the Definitive Agreement is
hereby incorporated by reference as if fully set forth in this Agreement and the
defined terms used in Section 2.05(a) of the Definitive Agreement shall have the
meanings ascribed to such terms in the Definitive Agreement.

        Section 3. Conditions Precedent.

            3.1 Conditions Precedent to the Interim Loans. The obligation of
QUALCOMM to make the initial Interim Loan is subject to the satisfaction (or
waiver by QUALCOMM in its sole discretion) of the following conditions
precedent:

                   (a) Sprint Settlement Agreement. Delivery to QUALCOMM of a
fully executed Sprint Settlement Agreement.

                   (b) Amended and Restated Shareholders' Agreement and
Amendment to the Bylaws of each member of the Borrower Grow. Delivery to
QUALCOMM of the fully executed Amended and Restated Shareholders' Agreement in
the form of Exhibit I and an amendment in form and substance reasonably
satisfactory to QUALCOMM, to the bylaws of each member of the Borrower Group.

                   (c) Interim Business Plan. Delivery to QUALCOMM of the
Interim Business Plan.

                   (d) Amendment to Collateral Agency Agreement. Delivery to
QUALCOMM of the fully executed Amendment No. 2 to the Collateral Agency
Agreement substantially in the form of Exhibit J.

                                      -12-
<PAGE>

                   (e) Amendment to the Intercreditor Agreement. Delivery to
QUALCOMM of the fully executed Amendment No. 2 to the Intercreditor Agreement
substantially in the form of Exhibit K.

                   (f) Stock Option Agreement. Delivery to QUALCOMM by Holdings
of the fully executed stock option agreement in the form of Exhibit F-1 and a
fully executed Spanish translation of the stock option agreement in the form of
Exhibit F-2.

                   (g) Waivers and Acknowledgment Letter. Delivery to QUALCOMM
of the fully executed Notice and Request for Amendments and Waivers Letter in
the form of Exhibit L.

                   (h) Sale Transaction Proceeds Allocation Agreement. Delivery
to QUALCOMM of the fully executed Sale Transaction Proceeds Allocation Agreement
in the form of Exhibit D.

                   (i) Interim Loan Pagare. Delivery to QUALCOMM of the fully
executed Interim Loan Pagare in the form of Exhibit A-1 evidencing the Interim
Loans funded on such date.

                   (j) Funding of Backstop Fee Loan. Delivery to QUALCOMM of the
executed Backstop Fee Loan Pagare in the form of Exhibit A-2 evidencing the
Backstop Fee Loan.

                   (k) Opinions of Counsel. Delivery to QUALCOMM of opinions,
each dated the date that all the conditions precedent in this Section 3.1 have
been satisfied and addressed to QUALCOMM and its agents, of:

              (i)  Fried Frank Harris Shriver & Jacobson, special New York
                   counsel to Borrower, in substantially the form of Exhibit
                   M-1; and

              (ii) Mijares, Angoitia, Cortes y Fuentes, S.C., Mexico counsel to
                   Borrower, in substantially the form of Exhibit M-2.

                   (1) Reaffirmation of all Guarantees and Counter-Guarantees.
Delivery to QUALCOMM of fully executed reaffirmations of the guarantees set
forth on Schedule 1.

                   (m) Resolutions. On or before the Closing Date, all
corporate, partnership and other proceedings taken by each member of the
Borrower Group or to be taken in connection with the transactions contemplated
by this Agreement, and all documents incidental to such transactions, shall be
reasonably satisfactory in form and substance to QUALCOMM and its counsel, and
QUALCOMM and such counsel shall have received all such counterpart originals or
certified copies of such documents, opinions, certificates, and evidence as they
may reasonably request.

                   (n) Alcatel Lender Consents. Delivery to QUALCOMM of fully
executed consents, acknowledgements and agreements to the Transaction Documents
by the Alcatel

                                      -13-
<PAGE>

Administrative Agent, the Intercreditor Agent and the Collateral Agent, in form
and substance satisfactory to QUALCOMM.

                   (o) Appointment of Process Agent. Evidence reasonably
satisfactory to QUALCOMM that (i) each member of the Borrower Group has
irrevocably appointed as its agent for service of process the Process Agent, and
(ii) the Process Agent has accepted the appointment and has agreed to forward
forthwith to each member of the Borrower Group all notices and legal process
addressed to such member of the Borrower Group upon receipt by such Process
Agent.

                   (p) Appointment of Process Agent under the Sale Transaction
Proceeds Allocation Agreement. Evidence reasonably satisfactory to QUALCOMM that
(i) each Appointing Shareholder (as defined in the Sale Transaction Proceeds
Allocation Agreement) has irrevocably appointed as its agent for service of
process the Person or Persons so specified in Section 10 of the Sale Transaction
Proceeds Allocation Agreement for purposes of both the Sale Transaction Proceeds
Allocation Agreement and any participation agreement under which such Appointing
Shareholder is a Participant, and (ii) each such agent has accepted the
appointment and has agreed to forward forthwith to each Appointing Shareholder
all notices and legal process addressed to such Appointing Shareholder upon
receipt by such agent.

                   (q) Amendment No. 4 to OUALCOMM Credit Agreement. Delivery to
QUALCOMM of the fully executed Amendment No. 4 to QUALCOMM Credit Agreement in
the form of Exhibit N.

            3.2 Conditions Precedent to the Additional Interim Loans. The
obligation of QUALCOMM to make, or cause to be made, the initial Additional
Interim Loans is subject to the satisfaction (or waiver by QUALCOMM in its sole
discretion) of the following conditions precedent and upon request from Borrower
the Administrative Agent shall provide confirmation that all conditions
precedent have been satisfied or otherwise waived by QUALCOMM:

                   (a) Stock Option Agreement. Delivery to QUALCOMM by Holdings
of the fully executed stock option agreement in the form of Exhibit F-3 and a
fully executed Spanish translation of the stock option agreement in the form of
Exhibit F-4.

                   (b) Business Plan. Delivery of the Business Plan in form and
substance reasonably satisfactory to QUALCOMM.

                   (c) Additional Interim Loan Pagare. Delivery of the initial
Additional Interim Loan Pagare in the form of Exhibit A-3.

                   (d) Interim Loans. The Interim Loan Commitments shall have
been fully utilized.

                   (e) Reaffirmation of all Guarantees and Counter-Guarantees.
Solely with respect to the initial Additional Interim Loan, delivery to QUALCOMM
of fully executed reaffirmations of the guarantees set forth on Schedule 1.

                                      -14-
<PAGE>

                    (f) Resolutions. On or before the Additional Interim Loan
Funding Closing Date, all notarized corporate, partnership and other proceedings
taken by each member of the Borrower Group or to be taken in connection with the
transactions contemplated by this Agreement, and all documents incidental to
such transactions, shall be reasonably satisfactory in form and substance to
QUALCOMM and its counsel, and QUALCOMM and such counsel shall have received all
such counterpart originals or certified copies of such documents, opinions,
certificates, and evidence as they may reasonably request.

                   (g) Amendment No. 5 to OUALCOMM Credit Agreement. Delivery to
QUALCOMM of the fully executed Amendment No. 5 to QUALCOMM Credit Agreement in
the form of Exhibit O.

                   (h) Amendment No. 1 to Electro Banque Facility 2 Credit
Agreement. Delivery to QUALCOMM of the fully executed Amendment No. 1 to Electro
Banque Facility 2 Credit Agreement in the form of Exhibit P.

                   (i) Participation Agreement. On or before the Additional
Interim Loan Funding Closing Date, the Participation Agreement shall be fully
executed in form and substance satisfactory to QUALCOMM.

                   (j) Opinions of Counsel. Solely with respect to the initial
Additional Interim Loan, delivery to QUALCOMM of opinions, each dated the date
that all the conditions precedent in this Section 3.2 have been satisfied and
addressed to QUALCOMM and its agents, of:

               (i)  Fried Frank Harris Shriver & Jacobson, special New York
                    counsel to Borrower, in substantially the form of Exhibit
                    M-3; and

               (ii) Mijares, Angoitia, Cortes y Fuentes, S.C., Mexico counsel to
                    Borrower, in substantially the form of Exhibit M-4.

            3.3 Conditions Precedent to the Backstop Fee Loan. The obligation of
QUALCOMM to make the Backstop Fee Loan is subject to Borrower's delivery of the
duly executed Backstop Fee Loan Pagare in the form of Exhibit A-2 in the amount
of $5,000,000.00 evidencing the Backstop Fee Loan.

            3.4 Conditions Precedent to all Special Loans. The obligation of
QUALCOMM to make any Special Loan is subject to the satisfaction (or waiver by
QUALCOMM in its sole discretion) of the following conditions:

                   (a) Representations and Warranties. At the time of the
Borrowing of each Special Loan and also after giving effect thereto, all
representations and warranties made in Section 6 of this Agreement, Section 5 of
the Credit Agreement and Article VII of the Electro Banque Facility 2 Credit
Agreement (unless expressly waived pursuant to this Agreement) shall be true and
correct in all material respects with the same effect as though such
representations and warranties had been made on and as of the date of such
Borrowing, except to the extent that such representations and warranties (i)
expressly relate to an earlier date or (ii) fail to be true and correct solely
as a result of a Covered Default.

                                      -15-
<PAGE>

                   (b) Loan Request. QUALCOMM shall have received a Loan Request
meeting the requirements of Section 2.1(d).

                   (c) No Default. Immediately before and after giving effect to
the disbursement of such Special Loan, no Default or Event of Default (other
than a Covered Default) shall have occurred and be continuing.

                   (d) Material Adverse Effect. Since the delivery of the last
(i) Interim Business Plan approved by QUALCOMM or (ii) Business Plan approved by
QUALCOMM, no event, circumstance or condition shall have occurred that
constitutes a Material Adverse Effect and QUALCOMM has provided notice to
Borrower that a Material Adverse Effect exists.

                   (e) Acknowledgment of Indebtedness. Delivery of an
acknowledgment of indebtedness instrument evidencing the Special Loan funded by
QUALCOMM on terms satisfactory to QUALCOMM notarized by a notary public
acceptable to QUALCOMM.

                   (f) Regulatory Approvals. Delivery of documentation
reasonably satisfactory to QUALCOMM evidencing the satisfaction of, and
compliance with, the regulatory milestone on or before the date set forth for
such milestone as set forth in Schedule 3, unless such documentation has
previously been delivered to QUALCOMM in connection with a prior Loan Request.

                   (g) Other Documents. QUALCOMM shall have received such other
statements, certificates, agreements, opinions, information, documents and
evidence with respect to matters relating to or affecting the Special Loans as
QUALCOMM may reasonably request.

                   (h) Purchase of Participation. Solely with respect to
Additional Interim Loans advanced from the Tranche B Commitment pursuant to this
Agreement, QUALCOMM shall have purchased from Electro Banque a participation
under the Participation Agreement in the amount to be advanced.

                   (i) Additional Interim Loan Pagare. Solely with respect to
Additional Interim Loans (other than the initial Additional Interim Loan),
delivery of the appropriate Additional Interim Loan Pagare.

        Section 4. Conditional Waivers. QUALCOMM, Ericsson and the
Administrative Agent (a) waive the conditions precedent in Section 4.2 of the
Credit Agreement with respect to the satisfaction of the conditions precedent
set forth in Section 3.02(b) of the Common Agreement regarding the non-existence
of an Event of Default solely with respect to Covered Vendor Parties Defaults
and solely to permit funding of the Special Loans under this Agreement and
consent to the funding of such Special Loans by QUALCOMM, and (b) solely to the
extent necessary to permit funding of Special Loans pursuant to this Agreement,
waive the conditions precedent under Section 3.2 of Amendment No. 3 to Amended
and Restated Credit Agreement, dated as of October 10, 2001 ("Amendment No. 3")
including the condition that requires the Ericsson Additional Commitment (as
defined in Amendment No. 3) to have been fully utilized by Borrower prior to the
making of loans by QUALCOMM under the QUALCOMM Additional Commitment (as defined
in Amendment No. 3).

                                      -16-
<PAGE>

            Electro Banque and the Facility 2 Administrative Agent (a) waive the
condition precedent in Section 6.02(b) of the Electro Banque Facility 2 Credit
Agreement with respect to the satisfaction of the conditions precedent set forth
in Section 3.02(b) of the Common Agreement regarding the non-existence of an
Event of Default solely with respect to Covered Vendor Facility Defaults (and
not for any other purpose), (b) solely to the extent necessary to permit funding
of Additional Interim Loans from the Tranche B Term Facility pursuant to this
Agreement (and not for any other purpose) and subject to clause (a) of this
paragraph, waive the conditions precedent in Sections 6.01 and 6.02 of the
Electro Banque Facility 2 Credit Agreement, and (c) consent to the funding of
such Additional Interim Loans by Electro Banque (at the request of Borrower and
approved by QUALCOMM).

            QUALCOMM, Alcatel, Ericsson, the Administrative Agent, Electro
Banque and the Facility 2 Administrative Agent (a) acknowledge and consent to
(i) the use of proceeds of the Special Loans to be made under this Agreement,
the Credit Agreement and the Electro Banque Facility 2 Credit Agreement and (ii)
the terms and conditions of the Special Loans to be made by QUALCOMM pursuant to
this Agreement or by Electro Banque (at the request of Borrower and approved by
QUALCOMM) pursuant to the Electro Banque Facility 2 Credit Agreement, including
the interest rate and the maturity of such Special Loans (other than Additional
Financing Facility Loans), and (b) confirm and acknowledge that the Special
Loans constitute Senior Indebtedness, notwithstanding any provision of the
Common Agreement to the contrary.

            Borrower and the other members of the Borrower Group acknowledge
that Electro Banque has no obligation to advance Additional Interim Loans from
the Tranche B Commitment unless and until QUALCOMM purchases from Electro
Banque, pursuant to the Participation Agreement, a participation in the amount
to be advanced.

        Section 5. Covenants of Borrower.

              5.1 Statements and Use of Proceeds.

                   (a) Operating Statements. Borrower shall furnish to QUALCOMM
no later than each Monday at 11:00 a.m., San Diego time, commencing with the
first Monday after the funding of the initial Interim Loan, an operating
statement for the Business for the week ending the prior Friday, in form and
substance satisfactory to QUALCOMM. Such operating statement shall set forth for
each such period (a) all expenditures (actual and accrued detailed separately)
for Operating Costs, Working Capital, Financing Costs and Capital Expenditures,
(b) all cash received (from accounts receivables and sales) from the Business
for the prior week, (c) operating information, including without limitation,
Subscribers and other performance statistics, and (d) a status report of all
accounts payable and receivables outstanding at the end of such period.

                   (b) Other Financial Statements and Reports. Borrower shall
furnish to QUALCOMM on the respective due dates set forth in the Definitive
Agreement, the consolidated balance sheets or equivalent statements of financial
position, the management reports and all similar documents of the Borrower Group
required to be provided to the Transition Committee (as defined in the
Definitive Agreement) pursuant to the Definitive Agreement.

                                      -17-
<PAGE>

                   (c) Backstop Fee Loan Proceeds. Borrower shall use the
proceeds of the Backstop Fee Loan to pay the backstop commitment fee due and
payable to QUALCOMM (the "Backstop Fee") in connection with a financial
accommodation previously provided by QUALCOMM to Borrower.

                   (d) Additional Interim Loans Proceeds. Borrower shall use the
proceeds of the Additional Interim Loans to operate in accordance with the
Business Plan.

                   (e) Accelerated Disbursement of Additional Interim Loans.
Notwithstanding anything to the contrary in this Agreement, Borrower may
accelerate the funding of Additional Interim Loans (if a change in market
conditions so requires in order to achieve the commercial objectives of the
Business Plan), subject to the prior written consent of QUALCOMM (which consent
shall not be unreasonably withheld).

                   (f) Appointment of Process Agent. Prior to May 31, 2002 (i)
each member of the Borrower Group shall have irrevocably appointed as its agent
for service of process the Process Agent, and (ii) the Process Agent shall have
accepted such appointment and agreed to forward forthwith to each member of the
Borrower Group all notices and legal process addressed to such member of the
Borrower Group upon receipt by such Process Agent.

                   (g) Corporate Actions. Each member of the Borrower Group
shall take, prior to the Additional Interim Loan Funding Closing Date, all
corporate actions necessary to authorize the execution, delivery and performance
by it of each Transaction Document to which it is a party.

            5.2 Regulatory Approvals. Borrower shall use its best efforts to
satisfy the milestones for obtaining governmental approvals on or before the
dates set forth for such milestones as set forth in Schedule 3.

            5.3 Borrower Group Release. Each member of the Borrower Group agrees
on the date the Special Loans are repaid in full, to execute and deliver a
letter of release substantially in the form attached to this Agreement as
Exhibit E.

        Section 6. Representations and Warranties. Each member of the Borrower
Group, jointly and severally, makes the representations and warranties contained
in this Section 7 for the benefit of the QUALCOMM Lenders and the QUALCOMM
Administrative Agent.

                   (a) All the regulatory approvals required for the execution,
delivery and performance of each Transaction Document, and for the Borrowing and
payment of Special Loans by the Borrower, have been obtained and are in full
force and effect.

                   (b) The representations and warranties of each member of the
Borrower Group contained in the Credit Agreement are (before and after giving
effect to this Agreement) true and correct as if made as of the date of this
Agreement except to the extent that such representations and warranties (i)
expressly relate to a different date or (ii) fail to be true and correct solely
as a result of a Covered Default.

                                      -18-
<PAGE>

                   (c) This Agreement and each other Transaction Document, when
executed and delivered by the members of the Borrower Group on or before the
date this representation is made or deemed made, constitutes the legal, valid
and binding obligation of such member enforceable in accordance with its terms,
except as the enforceability thereof may be limited by (i) applicable
bankruptcy, insolvency and other similar laws affecting creditors' generally and
(ii) general equitable principles regardless of whether the issue of
enforceability is considered in a proceeding in equity or at law.

                   (d) All authorizations, consents and permits necessary under
Applicable Law in connection with the due execution and delivery of, and
performance by each member of the Borrower Group of its obligations under, each
Transaction Document to which it is a party have been duly obtained.

                   (c) No member of the Borrower Group is in default with
respect to any order of any court, arbitrator, administrative agency or other
Governmental Authority, other than any order that is the subject of a Good Faith
Contest or other order the default under which, or the non-compliance with
which, would not reasonably be expected to result in a Material Adverse Effect.
There is no injunction, writ, or preliminary restraining order of any nature
issued by an arbitrator, court or other Governmental Authority directing that
any of the transactions provided for in this Agreement or any other Transaction
Document not be consummated as herein or therein provided.

                   (f) No Event of Default or Bridge Event of Default has
occurred and is occurring other than Covered Defaults.

                   (g) All events or conditions occurring prior to the Signing
Date that could reasonably be expected to have a Material Adverse Effect have
been previously disclosed by Borrower in writing to QUALCOMM. Since the Signing
Date, no event has occurred that could reasonably be expected to have a Material
Adverse Effect.

                   (h) The Business Plan has been prepared by Borrower and the
other members of the Borrower Group in good faith on the basis of assumptions
that were reasonable at the time the Business Plan was prepared (or updated as
required under this Agreement) and that are consistent with the terms of all
contracts, agreements and instruments (other than contracts, agreements and
instruments expressly stated in the Business Plan to be modified or terminated,
if any) to which any member of the Borrower Group is a party or by which its
properties are bound.

        Section 7. Events of Default. A breach of any of the covenants set forth
in Section 5 of this Agreement, the failure by Borrower to perform any of its
material obligations under this Agreement or the failure of any of Borrower's
representations to be true and correct at any time shall constitute an Event of
Default under the Credit Agreement, the Electro Banque Facility 2 Credit
Agreement and the Common Agreement and QUALCOMM shall be entitled to exercise
the remedies set forth in the Common Agreement, the Security Documents or the
Financing Agreements or as otherwise available at law or in equity.

        Section 8. Miscellaneous.

                                      -19-
<PAGE>

                   (a) Reference to and Effect on the Credit Agreement and the
other Financing Agreements. The execution, delivery and performance of this
Agreement shall not, except as expressly provided in this Agreement, constitute
a waiver of any provision of, or operate as a waiver of any right, power or
remedy of the Lenders, the Administrative Agent, Electro Banque and the Facility
2 Administrative Agent under, the Credit Agreement or the Electro Banque
Facility 2 Credit Agreement, as applicable, or any of the other Financing
Agreements.

                   (b) Fees and Expenses. Borrower acknowledges that all
reasonable costs, fees and expenses incurred by QUALCOMM and its counsel with
respect to this Agreement, the extension of credit under this Agreement, the
making or collection of the Special Loans, and the documents and transactions
contemplated in this Agreement shall be for the account of Borrower and shall be
payable by Borrower on demand.

                   (c) Execution in Counterparts: Effectiveness. This Agreement
may be executed in any number of counterparts, and by different parties hereto
in separate counterparts, each of which when so executed and delivered shall be
deemed an original, but all such counterparts taken together shall constitute
but one and the same instrument. Delivery of an executed counterpart of a
signature page to this Agreement by facsimile transmission shall be effective as
delivery of a manually executed counterpart of this Agreement.

                   (d) Headings. Section and subsection headings in this
Agreement are included for convenience of reference only and shall not
constitute a part of this Agreement for any other purpose or be given any
substantive effect.

                   (e) Severability. If any provision contained in or obligation
under this Agreement shall be invalid, illegal or unenforceable in any
jurisdiction, the validity, legality and enforceability of the remaining
provisions or obligations, or of such provision or obligation in any other
jurisdiction, shall not in any way be affected or impaired thereby.

                   (f) Governing Law; Jurisdiction. THIS AGREEMENT SHALL BE
GOVERNED BY, AND SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH, THE LAWS OF
THE STATE OF NEW YORK. EACH PARTY TO THIS AGREEMENT IRREVOCABLY AND
UNCONDITIONALLY SUBMITS, FOR ITSELF AND ITS PROPERTY, TO THE NONEXCLUSIVE
JURISDICTION OF THE SUPREME COURT OF THE STATE OF NEW YORK SITTING IN NEW YORK
COUNTY AND OF THE UNITED STATES DISTRICT COURT FOR THE SOUTHERN DISTRICT OF NEW
YORK, AND ANY APPELLATE COURT FROM ANY SUCH COURT, FOR THE PURPOSES OF ALL LEGAL
PROCEEDINGS ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS
CONTEMPLATED BY THIS AGREEMENT, AND EACH OF THE PARTIES TO THIS AGREEMENT
IRREVOCABLY AND UNCONDITIONALLY AGREES THAT ALL CLAIMS IN RESPECT OF ANY SUCH
ACTION OR PROCEEDING MAY BE HEARD AND DETERMINED IN SUCH NEW YORK STATE OR, TO
THE EXTENT PERMITTED BY LAW, IN SUCH FEDERAL COURT. EACH OF THE PARTIES HERETO
IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY LAW, ANY OBJECTION WHICH
IT MAY NOW OR HEREAFTER HAVE TO THE LAYING OF THE VENUE OF ANY SUCH PROCEEDING
BROUGHT IN SUCH A COURT AND ANY

                                      -20-
<PAGE>

CLAIM THAT ANY SUCH PROCEEDING BROUGHT IN SUCH A COURT HAS BEEN BROUGHT IN AN
INCONVENIENT FORUM. EACH OF THE PARTIES AGREES THAT A FINAL JUDGMENT IN ANY SUCH
ACTION OR PROCEEDING SHALL BE CONCLUSIVE AND MAY BE ENFORCED IN OTHER
JURISDICTIONS (INCLUDING MEXICO) BY SUIT ON THE JUDGMENT OR IN ANY OTHER MANNER
PROVIDED BY LAW. NOTHING IN THIS AGREEMENT SHALL AFFECT ANY RIGHT THAT QUALCOMM,
THE ADMINISTRATIVE AGENT OR ANY PARTY MAY OTHERWISE HAVE TO BRING ANY ACTION OR
PROCEEDING RELATING TO THIS AGREEMENT AGAINST BORROWER OR THE BORROWER GROUP OR
THEIR RESPECTIVE PROPERTIES IN THE COURTS OF ANY JURISDICTION.

                   (g) Waiver of Jury Trial. EACH PARTY TO THIS AGREEMENT HEREBY
WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT THAT IT MAY
HAVE TO A TRIAL BY JURY IN ANY LEGAL PROCEEDING DIRECTLY OR INDIRECTLY ARISING
OUT OF OR RELATING TO THIS AGREEMENT, THE CREDIT AGREEMENT, THE PAGARES OR THE
TRANSACTIONS CONTEMPLATED IN THIS AGREEMENT (WHETHER BASED ON CONTRACT, TORT OR
ANY OTHER THEORY). EACH PARTY TO THIS AGREEMENT (A) CERTIFIES THAT NO
REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY
OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK
TO ENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER
PARTIES HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER
THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION.

                   (h) Currency of Payment. The obligation of Borrower and the
other members of the Borrower Group to pay in Dollars those amounts of the sums
specified to be due in Dollars, under this Agreement, the Credit Agreement, the
Pagare or the applicable documents executed in connection with this Agreement
(the "Loan Document Currency") shall not be deemed to have been novated,
discharged or satisfied by any tender of (or recovery under judgment expressed
in) any currency other than the Loan Document Currency, except to the extent to
which such tender (or recovery) shall result in the effective payment of such
aggregate amount in the applicable Loan Document Currency at the place where
such payment is due and, accordingly, the amount (if any) by which any such
tender (or recovery) shall fall short of such amount shall be and remain due to
QUALCOMM, as the case may be, as a separate Obligation, unaffected by judgment
having been obtained (if such is the case) for any other amounts due in respect
of this Agreement, the Credit Agreement, the Pagare or the applicable documents
executed in connection with this Agreement.

                   (i) English Language. This Agreement is made in the English
language. One Spanish language translation of this Agreement prepared (if
requested by QUALCOMM) at Borrower's expense by an official public interpreter
and approved by Mexican counsel to Borrower and Mexican counsel to Lenders under
this Agreement shall be the agreed Spanish language translation of this
Agreement for all purposes. Such translation and no other may be filed in one or
more public registries in Mexico or used in any proceeding in Mexico. For all
purposes, the English language version of this Agreement shall be the original
instrument and in

                                      -21-
<PAGE>

all cases of conflict between the English and the Spanish versions, the English
version shall control.

                   {j) Appointment of Process Agent. Each member of the Borrower
Group hereby agrees that service of all writs, process and summonses in any
suit, action or proceeding brought in the State of New York relating to this
Agreement or any of the other Transaction Documents may be made upon CT
Corporation System, presently located at 111 Eighth Avenue, 13th Floor, New
York, New York 10011, U.S.A. (the "Process Agent"), and each member of the
Borrower Group hereby confirms and agrees that the Process Agent has been duly
and irrevocably appointed as its agent and true and lawful attorney-in-fact in
its name, place and stead to receive and forward such service of any and all
such writs, process and summonses for a period ending no earlier than December
31, 2003 and, thereafter, for subsequent one-year periods, so long as this
Agreement is in full force and effect, until the obligations of each member of
the Borrower Group under this Agreement have been fulfilled, the Special Loans
have been paid in full and the Special Loan Commitments have been irrevocably
terminated. Each member of the Borrower Group agrees that the failure of the
Process Agent to give any notice of any such service of process to such member
of the Borrower Group shall not impair or affect the validity of such service or
of any judgment based thereon. Each member of the Borrower Group hereby further
irrevocably consents to the service of process in any suit, action or proceeding
in said courts by the mailing thereof by any party hereto by registered or
certified mail, postage prepaid, at Paseo de los Tamarindos 400-A, Piso 24,
Bosques de las Lomas, Mexico, D.F. 05120, Mexico, Attention: Director General.

                             [SIGNATURES TO FOLLOW]

                                      -22-
<PAGE>

            IN WITNESS WHEREOF, each of the parties hereto has caused a
counterpart of this Agreement to be duly executed and delivered as of the data
first above written.

PEGASO COMUNICACIONES Y SISTEMAS, S.A. DE C.V.

By:  /s/
   -------------------------------
Name:
Title:

PEGASO TELECOMUNICACIONES, S.A. DE C.V.

By:  /s/
   -------------------------------
Name:
Title:

PEGASO PCS, S.A. DE C.V.

By:  /s/
   -------------------------------
Name:
Title:

PEGASO FINANZAS, S.A. DE C.V.

By:  /s/
   -------------------------------
Name:
Title:

PEGASO RECURSOS HUMANOS, S.A. DE C.V.

By:  /s/
   -------------------------------
Name:
Title:

PEGASO FINCO I, S.A DE C.V.

By:  /s/
   -------------------------------
Name:
Title:

<PAGE>

QUALCOMM INCORPORATED
as a Lender

By: /s/
   -------------------------------
Name:
Title: President

<PAGE>

ELECTRO BANQUE
--------------------------------------------
as a lender under the Electro Banque Facility 2 Credit Agreement

By: /s/
   -------------------------------
Name:
Title: Director

By: /s/
   -------------------------------
Name:
Title: Deputy Head of Banking Dept.

<PAGE>

Consented and agreed to and acknowledged,
with respect to the provisions set forth in Section 4
as of the date first written above, by:

TELEFONAKTIEBOLAGET L.M. ERICSSON (PUBL)
as a Lender

By: /s/
   -------------------------------
Name:
Title:

By: /s/
   -------------------------------
Name:
Title:

<PAGE>

ABN AMRO BANK N.V.
as Administrative Agent

By: /s/
   -------------------------------
Name:
Title: Group Vice President

By: /s/
   -------------------------------
Name:
Title: AVP

<PAGE>

ALCATEL

By: /s/
   -------------------------------
Name:
Title: Alcatel Director, Deputy CFO

<PAGE>

ELECTRO BANQUE
as Facility 2 Administrative Agent

By: /s/
   -------------------------------
Name:
Title: Director

By: /s/
   -------------------------------
Name:
Title: Deputy Head of Banking Dept.<PAGE>
                                                                   EXHIBIT 10.51

                           AMENDMENT NO. 5 TO AMENDED
                          AND RESTATED CREDIT AGREEMENT

            This AMENDMENT No. 5 To AMENDED AND RESTATED CREDIT AGREEMENT, dated
as of April 26, 2002 (this "AMENDMENT"), is entered into by and among PEGASO
COMUNICACIONES Y SISTEMAS, S.A. DE C.V., a corporation organized under the laws
of Mexico ("Borrower"), the other members of the BORROWER GROUP, QUALCOMM
INCORPORATED, a corporation organized under the laws of Delaware ("QUALCOMM"),
TELEFONAKTIEBOLAGET L.M. ERICSSON (PUBL), a limited liability company organized
under the laws of Sweden ("Ericsson"), the lenders from time to time party to
the Credit Agreement (as defined below) (together with QUALCOMM and Ericsson,
each a "Lender", and, collectively, the "Lenders"), and ABN AMRO BANK N.V. as
administrative agent for the Lenders ("Administrative Agent").

                                    RECITALS

            WHEREAS, Borrower has entered into the Amended and Restated Credit
Agreement, dated as of December 15, 1998 (as amended, modified, supplemented or
restated, the "Credit Agreement"), by and among Borrower, QUALCOMM, Ericsson and
the Administrative Agent, as amended by Amendment No. 1 to Amended and Restated
Credit Agreement, dated as of May 27, 1999, Amendment No. 2 to Amended and
Restated Credit Agreement, dated as of November 28, 2000, Amendment No. 3 to
Amended and Restated Credit Agreement, dated as of October 10, 2001 ("Amendment
No. 3"), and Amendment No. 4 to Amended and Restated Credit Agreement, dated as
of January 16, 2002.

            WHEREAS, Pegaso Telecomunicaciones S.A. de C.V., a corporation
organized under the laws of Mexico ("Holdings"), has entered into the Stock
Purchase Agreement, dated as of the date hereof (as amended, modified,
supplemented or restated from time to time, the "Stock Purchase Agreement"), by
and among Holdings, its shareholders (the "Shareholders"), Telefonica Moviles,
S.A., a corporation organized under the laws of the Kingdom of Spain ("TEM"),
and the other parties named therein, pursuant to which TEM shall purchase from
certain of the Shareholders all the capital stock of Holdings owned by such
Shareholders in accordance with the terms and conditions of the Stock Purchase
Agreement.

            WHEREAS, the Borrower has entered into the Amended and Restated
Interim Funding Agreement, dated as of the date hereof (as amended, modified,
supplemented or restated from time to time, the "Interim Funding Agreement"), by
and among the Borrower, the other members of the Borrower Group, QUALCOMM and
Electro Banque, and consented and agreed to and acknowledged by Ericsson, the
Administrative Agent, the Facility 2 Administrative Agent and Alcatel, a
corporation organized under the laws of France ("Alcatel"), pursuant to which
QUALCOMM and Electro Banque will make Special Loans (as defined in the Interim
Funding Agreement) to Borrower from QUALCOMM's unused Facility-2 Commitment
under the Credit Agreement and from the Facility 2 Credit Agreement,
respectively, for the purpose, among other things, of financing the payment of
operating expenditures of Borrower in accordance with the Business Plans
described in the Stock Purchase Agreement.

<PAGE>

            WHEREAS, QUALCOMM, Alcatel and Ericsson have entered into the Second
Vendor Parties Forbearance Agreement, acknowledged, accepted and agreed to by
each member of the Borrower Group and the other parties named therein, dated as
of April 26, 2002 (as amended, modified, supplemented or restated from time to
time, the "Second Vendor Forbearance Agreement"), pursuant to which all Covered
Vendor Facility Defaults (as defined in the Second Vendor Forbearance Agreement)
are forborne until the occurrence of a Forbearance Termination Event (as defined
in the Second Vendor Forbearance Agreement).

            WHEREAS, the members of the Borrower Group have requested to amend
certain terms and provisions of the Credit Agreement as set forth in this
Amendment and the Lenders and the Administrative Agent have agreed to amend the
Credit Agreement in accordance with the terms, subject to the conditions, and in
reliance upon the representations and warranties set forth below.

            NOW, THEREFORE, in consideration of the foregoing recitals and the
following mutual covenants and promises, and other good and valuable
consideration, the receipt and adequacy of which are hereby acknowledged, and
intending to be legally bound, the parties agree as follows:

            SECTION 1. DEFINITIONS. All capitalized terms used but not defined
in this Amendment shall have the meanings given to them in the Credit Agreement
or, if not defined therein, in the Common Agreement and the Interim Funding
Agreement.

            SECTION 2. AMENDMENTS TO CREDIT AGREEMENT.

            2.1 SECTION 9 (DEFINITIONS). Section 9 of the Credit Agreement is
hereby amended as follows:

                (a) DEFINITION OF "ADDITIONAL INTERIM LOANS". A new definition
of "Additional Interim Loans" is added in appropriate alphabetical order to read
as follows:

            "Additional Interim Loans" shall have the meaning given to that term
        in the Interim Funding Agreement.

                (b) DEFINITION OF "INTERIM FUNDING AGREEMENT". A new definition
of "Interim Funding Agreement" is added in the appropriate alphabetical order to
read as follows:

            "Interim Funding Agreement" shall mean the Amended and Restated
        Interim Funding Agreement dated as of April 26, 2002, as amended,
        modified, supplemented or restated from time to time, by and among the
        Borrower, the other members of the Borrower Group, QUALCOMM and Electro
        Banque, and consented and agreed to and acknowledged by Ericsson, the
        Administrative Agent, the Facility 2 Administrative Agent and Alcatel.

                (c) DEFINITION OF "SPECIAL LOAN SCHEDULED MATURITY DATE". A new
definition of "Special Loan Scheduled Maturity Date" is added in the appropriate
alphabetical order to read as follows:

                                      -2-
<PAGE>

            "Special Loan Scheduled Maturity Date" has the meaning assigned to
        such term in the Interim Funding Agreement.

                2.2 QUALCOMM ADDITIONAL COMMITMENT. Section 3.2 of Amendment No.
3 is hereby deleted and replaced in its entirety with the following:

        "3.2 QUALCOMM ADDITIONAL COMMITMENT. The QUALCOMM Additional Commitment
        shall be available (a) for purposes of making Interim Loans, the
        Backstop Fee Loan and up to $31,000,000 for Additional Interim Loans
        pursuant to the Interim Funding Agreement, upon satisfaction of the
        conditions precedent to funding under the Interim Funding Agreement and
        (b) for the purposes of making Facility-2 Loans under the QUALCOMM
        Additional Commitment for the uses specified in Section 3.4 of Amendment
        No. 3, upon the satisfaction of the following conditions precedent: (1)
        execution and delivery of a Definitive Agreement, (2) consummation of a
        Sale Transaction in accordance with the terms and conditions set forth
        in the Definitive Agreement, (3) payment in full of all Borrower's
        obligations in respect of Interim Loans, the Backstop Fee Loan and the
        Additional Interim Loans, (4) the irrevocable termination of the Special
        Loan Commitments under the Interim Funding Agreement, (5) the
        utilization by Borrower of the full Ericsson Additional Commitment, and
        (6) the satisfaction (or waiver by QUALCOMM in its sole discretion) of
        the other conditions precedent to the making of Facility-2 Loans under
        the Credit Agreement. QUALCOMM shall provide loans to Borrower under the
        QUALCOMM Additional Commitment only upon (x) with respect to Interim
        Loans, the Backstop Fee Loan and the Additional Interim Loans, the
        receipt of a Loan Request in accordance Section 2.1(d) of the Interim
        Funding Agreement and (y) with respect to any other loans permitted
        under the Credit Agreement, including without limitation, loans made
        under the QUALCOMM Additional Commitment for the purposes set forth in
        Section 3.4 of Amendment No. 3, the receipt of a Loan Request and the
        supporting invoices in the manner and in accordance with the terms and
        conditions set forth in Section 1.5(b)(i) of the Credit Agreement.
        Without limiting the other provisions of the Credit Agreement applicable
        to QUALCOMM's Facility-2 Commitment with respect to the QUALCOMM
        Additional Commitment, QUALCOMM's Facility-2 Commitment with respect to
        the QUALCOMM Additional Commitment shall be automatically reinstated in
        accordance with its terms to the extent that the Interim Loans, the
        Additional Interim Loans and the Backstop Fee Loan are repaid by
        Borrower pursuant to Section 2.2(b), Section 2.3(b) and Section 2.4(b)
        of the Interim Funding Agreement, respectively, on or before the Special
        Loan Scheduled Maturity Date."

                2.3 PARTIAL INCORPORATION OF INTERIM FUNDING AGREEMENT. The
Credit Agreement, solely relating to the Special Loans funded from the QUALCOMM
Additional Commitment, is hereby modified by the Interim Funding Agreement, and
to the extent that the Interim Funding Agreement relates to the subject matter
of the Credit Agreement, the Interim Funding Agreement is hereby incorporated by
reference as if set out in full in this Amendment (including, without
limitation, any modification relating to Additional Interim Loans with respect
to interest rate, maturity and use of proceeds).

                                      -3-
<PAGE>

        SECTION 3. REFERENCE TO AND EFFECT ON CREDIT AGREEMENT AND OTHER
FINANCING AGREEMENTS.

                (a) On the Effective Date, each reference in the Credit
Agreement to "this Agreement," "hereunder," "hereof," "herein" or words of like
import shall mean and be a reference to the Credit Agreement as amended by this
Amendment and each reference in the Financing Agreements to the Credit Agreement
shall also mean and be a reference to the Credit Agreement as amended by this
Amendment.

                (b) The execution, delivery and effectiveness of this Amendment
shall not, except as expressly provided herein, operate as a waiver of any
right, power or remedy of the Administrative Agent or the Lenders under the
Credit Agreement or any of the Financing Agreements, nor constitute a waiver of
any provision of the Credit Agreement or any of the Financing Agreements.

        SECTION 4. REAFFIRMATION OF TERMS. This Amendment shall be construed in
connection with and as part of the Financing Agreements and all terms,
conditions, representations, warranties, covenants and agreements set forth in
the Financing Agreements, except as herein waived or amended, are hereby
ratified and confirmed and shall remain in full force and effect.

        SECTION 5. ACKNOWLEDGMENTS AND WAIVERS. Each member of the Borrower
Group hereby ratifies and reaffirms the validity and enforceability of all of
the Liens and security interests heretofore granted pursuant to the Common
Agreement and the Security Documents referred to therein, for the benefit of the
Lenders, as collateral security for the Senior Indebtedness, and acknowledges
that all of such Liens and security interests, and all collateral pledged as
security for the Senior Indebtedness, continue to be and remain collateral for
the Senior Indebtedness from and after the Effective Date, respectively.

        SECTION 6. RELEASE AND WAIVER.

                (a) Each member of the Borrower Group hereby acknowledges and
agrees that: (i) it has no claim or cause of action against any Lender or the
Administrative Agent, or any of their officers, directors, employees, attorneys
or other representatives or agents under the Financing Agreements with respect
to any condition, act, omission, event, contract, liability, obligation,
indebtedness, claim, cause of action, defense, circumstance or matter of any
kind whatsoever which existed, arose or occurred at any time prior to the
execution and delivery of this Amendment or which could arise concurrently with
the effectiveness of this Amendment ("Claims"); (ii) it has no offset or defense
against any of its respective obligations, indebtedness or contracts in favor of
any Lender or the Administrative Agent on account of any Claims; and (iii) it
recognizes that each Lender and the Administrative Agent has heretofore properly
performed and satisfied in a timely manner all of its obligations to and
contracts with each member of the Borrower Group relating to the Financing
Agreements.

                (b) Although the Administrative Agent and Lenders regard their
conduct as proper and do not believe any member of the Borrower Group to have
any claim, cause of action, offset or defense against any Lender or the
Administrative Agent in connection with the

                                      -4-
<PAGE>

Financing Agreements, Lenders and the Administrative Agent wish, and each member
of the Borrower Group agrees, to eliminate any possibility that any past
conditions, acts, omissions, events, circumstances or matters could impair or
otherwise affect any rights, interests, contracts or remedies of any Lender or
the Administrative Agent. Therefore, each member of the Borrower Group
unconditionally releases and waives as to all Lenders and the Administrative
Agent (1) any and all liabilities, indebtedness and obligations, whether known
or unknown, of any kind of any Lender or the Administrative Agent to any member
of the Borrower Group arising under the Financing Agreements and which exist on
the date hereof, except the obligations remaining to be performed by the Lenders
as expressly stated in the Financing Agreements; (2) any legal, equitable or
other obligations or duties, whether known or unknown, of the Lenders or of the
Administrative Agent to any member of the Borrower Group (and any rights of any
member of the Borrower Group against any Lender or the Administrative Agent)
arising under the Financing Agreements and which exist on the date hereof
besides those expressly stated in the Financing Agreements; (3) any and all
claims under any oral or implied agreement, obligation or understanding with any
Lender or the Administrative Agent, whether known or unknown, arising under the
Financing Agreements and which exist on the date hereof; and (4) all other
claims, causes of action or defenses of any kind whatsoever (if any), whether
known or unknown, which any member of the Borrower Group might otherwise have
against any Lender or the Administrative Agent on account of any Claims.

                (c) EACH MEMBER OF THE BORROWER GROUP AGREES TO ASSUME THE RISK
OF ANY AND ALL UNKNOWN, UNANTICIPATED OR MISUNDERSTOOD DEFENSES, CLAIMS, CAUSES
OF ACTION, CONTRACTS, LIABILITIES, INDEBTEDNESS AND OBLIGATIONS WHICH ARE
RELEASED BY THIS AMENDMENT IN FAVOR OF ANY LENDER OR THE ADMINISTRATIVE AGENT,
AND EACH MEMBER OF THE BORROWER GROUP HEREBY WAIVES AND RELEASES ALL RIGHTS AND
BENEFITS WHICH IT MIGHT OTHERWISE HAVE UNDER THE LAW OF THE STATE OF NEW YORK
AND THE LAW OF THE FEDERAL DISTRICT OF MEXICO WITH REGARD TO THE RELEASE OF SUCH
UNKNOWN, UNANTICIPATED OR MISUNDERSTOOD DEFENSES, CLAIMS, CAUSES OF ACTION,
CONTRACTS, LIABILITIES, INDEBTEDNESS AND OBLIGATIONS. TO THE EXTENT (IF ANY)
WHICH ANY SUCH LAWS MAY BE APPLICABLE, EACH MEMBER OF THE BORROWER GROUP WAIVES
AND RELEASES (TO THE MAXIMUM EXTENT PERMITTED BY LAW) ANY RIGHT OR DEFENSE WHICH
IT MIGHT OTHERWISE HAVE UNDER ANY OTHER LAW OF ANY APPLICABLE JURISDICTION WHICH
MIGHT LIMIT OR RESTRICT THE EFFECTIVENESS OR SCOPE OF ANY OF ITS WAIVERS OR
RELEASES UNDER THIS AMENDMENT.

        SECTION 7. REPRESENTATIONS AND WARRANTIES. In order to induce the
Lenders and the Administrative Agent to enter into this Amendment, each member
of the Borrower Group hereby represents, warrants and covenants to the Lenders
and the Administrative Agent as follows:

            7.1 Immediately after giving effect to this Amendment (i) the
representations and warranties contained in the Financing Agreements (other than
those which expressly relate to a different date) are true, accurate and
complete in all material respects as if made as of the Effective Date, except to
the extent that such representations and warranties fail to be true, accurate
and complete solely as a result of a Covered Vendor Facility Default (as defined
in the

                                      -5-
<PAGE>

Second Vendor Forbearance Agreement), (ii) other than to the extent expressly
acknowledged in writing by the Lenders in the Second Vendor Forbearance
Agreement, no Default or Event of Default has occurred and is continuing and
(iii) all references to the Credit Agreement in the Financing Agreements shall
be deemed to be references to the Credit Agreement as amended by this Amendment.

            7.2 The Charter Documents of (i) Borrower delivered to the
Administrative Agent remain true, accurate and complete and have not been
amended, supplemented or restated subsequent to January 2002 and continue to be
in full force and effect, and (ii) each other member of the Borrower Group
delivered to the Administrative Agent on the Closing Date remain true, accurate
and complete and have not been amended, supplemented or restated subsequent to
such date and continue to be in full force and effect.

            7.3 The execution, delivery and the performance of obligations of
this Amendment by each member of the Borrower Group has been duly authorized by
all requisite corporate action. This Amendment, as of the Effective Date,
constitutes the valid and binding obligations of each member of the Borrower
Group, enforceable in accordance with the terms herein.

            7.4 The execution, delivery and performance of this Amendment does
not and will not (i) violate or conflict with the Charter Documents of any
member of the Borrower Group, (ii) conflict with or violate any Applicable Law,
or (iii) result in any breach of, or constitute a default (or event which with
the giving of notice or lapse of time, or both, would become a default) under,
or give to any Person any rights of termination, amendment, acceleration or
cancellation of, or result in the creation of any Lien on any of the material
assets or properties of any member of the Borrower Group pursuant to, any
contract or other instrument relating to such assets or properties to which a
member of the Borrower Group is a party or by which any of such assets or
properties is bound or affected, except as would not, individually or in the
aggregate, materially impair the ability of the member Borrower to consummate
the transactions contemplated by this Amendment.

        SECTION 8. COUNTERPARTS. This Amendment may be executed in any number of
counterparts and all of such counterparts taken together shall be deemed to
constitute one and the same instrument. Delivery of an executed counterpart of a
signature page to this Amendment by facsimile transmission shall be effective as
delivery of a manually executed counterpart of this Amendment.

        SECTION 9. EFFECTIVENESS. The amendments set forth in this Amendment
shall be deemed effective upon the satisfaction, or waiver by QUALCOMM in its
sole discretion, of all of the conditions precedent (the "Effective Date") set
forth below. Upon request from the Company, the Administrative Agent shall
provide confirmation to the Company that such conditions precedent have been
satisfied or waived by the Administrative Agent.

            9.1 AMENDMENT. Each member of the Borrower Group and each Lender
shall have duly executed and delivered this Amendment to the Administrative
Agent, and if so requested in writing by any Lender or the Administrative Agent,
the notarization of this

                                      -6-
<PAGE>

Amendment and its immediately subsequent registration at the Public Registry of
Commerce of the Federal District of Mexico.

            9.2 ACKNOWLEDGMENT OF AMENDMENT AND REAFFIRMATION OF GUARANTY. The
Administrative Agent shall have received (i) the Acknowledgment of Amendment and
Reaffirmation of Guaranty (in English and Spanish), duly executed and delivered
by each Guarantor, and (ii) a notarized acknowledgment of indebtedness
(reconocimiento de adeudo) in form and substance satisfactory to each Lender and
the Administrative Agent, which shall evidence and describe, among others, the
amount due to the Lenders under the Credit Agreement as of the Effective Date.

            9.3 CERTIFIED RESOLUTIONS. The Administrative Agent shall have
received for each member of the Borrower Group a certificate of the appropriate
officers of such member of the Borrower Group dated as of the date hereof and as
of the Effective Date certifying (i) the names and true signatures of the
incumbent officers of such member of the Borrower Group authorized to sign this
Amendment, (ii) the notarized resolutions of such member's Board of Directors or
shareholders, as the Administrative Agent in its sole discretion may request,
approving and authorizing the execution, delivery and performance of this
Amendment, and (iii) that there have been no changes in the Charter Documents of
(A) Borrower since January 2002, and (B) each other member of the Borrower Group
since the date of certification thereof to the Administrative Agent in
connection with the closing of the Financing Agreements.

            9.4 PAYMENT OF REIMBURSEMENT AND INDEMNIFICATION OBLIGATIONS. Each
member of the Borrower Group shall have paid to the Lenders and the
Administrative Agent all of its reimbursement and indemnification obligations
owing under Section 11.1 of the Credit Agreement, including its obligation to
pay all attorneys' fees and costs and other disbursements incurred by the
Lenders or the Administrative Agent in connection with the negotiation,
implementation, execution and enforcement of this Amendment and any acts
contemplated thereby.

            9.5 PAGARE. Borrower and each other member of the Borrower Group
shall have duly executed and delivered to each Lender one or more consolidated
Pagares, as the Lenders in their sole discretion may request, that evidences all
outstanding Obligations owed by Borrower to such Lender as of the date hereof
under the Credit Agreement.

            9.6 OTHER DOCUMENTS AND ACTIONS. Borrower shall have duly executed
and delivered to the Administrative Agent any other documents (including
opinions and certificates) or taken any other actions as may be reasonably
requested by the Lenders or the Administrative Agent for purposes related to
this Amendment.

        SECTION 10. GOVERNING LAW. This Amendment shall be governed by, and
construed in accordance with, the law of the State of New York, United States,
without reference to principles of conflicts of law (other than Section 5-1401
of the General Obligations Laws of the State of New York); provided, however,
that in connection with any legal action or proceeding (other than an action to
enforce a judgment obtained in another jurisdiction) brought in respect to this
Amendment in the courts of Mexico or any political subdivision thereof, this
Amendment

                                      -7-
<PAGE>

shall be deemed to be an instrument made under the laws of Mexico and for such
purposes shall be governed by, and construed in accordance with, the laws of the
Federal District of Mexico.

                             [SIGNATURES TO FOLLOW]

                                      -8-
<PAGE>

            IN WITNESS WHEREOF, each of the parties hereto has caused a
counterpart of this Amendment to be duly executed and delivered as of the date
first above written.

PEGASO COMUNICACIONES Y SISTEMAS, S.A. DE C.V.

By:  /s/
   -------------------------------
Printed Name:
Title:

PEGASO TELECOMUNICACIONES, S.A. DE C.V.

By:  /s/
   -------------------------------
Printed Name:
Title:

PEGASO PCS, S.A. DE C.V.

By:  /s/
   -------------------------------
Printed Name:
Title:

PEGASO RECURSOS HUMANOS, S.A. DE C.V.

By:  /s/
   -------------------------------
Printed Name:
Title:

PEGASO FINANZAS, S.A. DE C.V.

By:  /s/
   -------------------------------
Printed Name:
Title:

PEGASO FINCO I, S.A. DE C.V.

By:  /s/
   -------------------------------
Printed Name:
Title:

<PAGE>

ABN AMRO BANK N.V.
as Administrative Agent

By: /s/
   -------------------------------
Printed Name:
             ---------------------
Title:
      ----------------------------

By: /s/
   -------------------------------
Printed Name:
              --------------------
Title:
      ----------------------------

QUALCOMM INCORPORATED
as a Lender

By:
   ------------------------------
Printed Name:
             --------------------
Title:
      ---------------------------

<PAGE>

ABN AMRO BANK N.V.
as Administrative Agent

By:
   ------------------------------
Printed Name:
             --------------------
Title:
      ---------------------------

By:
   ------------------------------
Printed Name:
             --------------------
Title:
      ---------------------------
QUALCOMM INCORPORATED
as a Lender

By: /s/
   ------------------------------
Printed Name:
             --------------------
Title:  President
      ---------------------------

<PAGE>

TELEFONAKTIEBOLAGET L.M. ERICSSON (PUBL)
as a Lender

By: /s/
   ------------------------------
Printed Name:
             --------------------
Title:
      ---------------------------

By: /s/
   ------------------------------
Printed Name:
             --------------------
Title:
      ---------------------------

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00041-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00041-of-00352.parquet"}]]