Document:

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                                                                    EXHIBIT 10.3

                                 PARENT GUARANTY

                          Dated as of January 10, 2005

                                      From

                        LEAP WIRELESS INTERNATIONAL, INC.

                                  as Guarantor

                                   in favor of

                       THE SECURED PARTIES REFERRED TO IN
                     THE CREDIT AGREEMENT REFERRED TO HEREIN

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                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
SECTION                                                                                                                  PAGE
<S>                                                                                                                      <C>
Section 1.   Guaranty..............................................................................................       1

Section 2.   Guaranty Absolute.....................................................................................       2

Section 3.   Waivers and Acknowledgments...........................................................................       3

Section 4.   Subrogation...........................................................................................       3

Section 5.   Payments Free and Clear of Taxes, Etc.................................................................       4

Section 6.   Representations and Warranties........................................................................       4

Section 7.   Covenants.............................................................................................       6

Section 8.   Amendments, Etc.......................................................................................       6

Section 9.   Notices, Etc..........................................................................................       6

Section 10.   No Waiver; Remedies..................................................................................       6

Section 11.   Right of Set-off.....................................................................................       6

Section 12.   Indemnification......................................................................................       7

Section 13.   Subordination........................................................................................       8

Section 14.   Continuing Guaranty; Assignments under the Credit Agreement..........................................       9

Section 15.   Execution in Counterparts............................................................................       9

Section 16.   Governing Law; Jurisdiction; Waiver of Jury Trial, Etc...............................................       9
</TABLE>

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<PAGE>

                                 PARENT GUARANTY

            PARENT GUARANTY dated as of January 10, 2005 made by Leap Wireless
International, Inc., a Delaware corporation (the "GUARANTOR"), in favor of the
Secured Parties (as defined in the Credit Agreement referred to below).

            PRELIMINARY STATEMENT. Cricket Communications, Inc., a Delaware
corporation (the "BORROWER"), and a wholly owned subsidiary of the Guarantor, is
party to a Credit Agreement dated as of January 10, 2005 (as amended, amended
and restated, supplemented or otherwise modified from time to time, the "CREDIT
AGREEMENT"; the capitalized terms defined therein and not otherwise defined
herein being used herein as therein defined) with certain Lender Parties party
thereto and Bank of America, N.A., as Administrative Agent for such Lender
Parties. The Guarantor may receive, directly or indirectly, a portion of the
proceeds of the Loans under the Credit Agreement and will derive substantial
direct and indirect benefits from the transactions contemplated by the Credit
Agreement. It is a condition precedent to the making of Loans and the issuance
of Letters of Credit by the Lender Parties under the Credit Agreement and the
entry by the Hedge Banks into Secured Hedge Agreements from time to time that
the Guarantor shall have executed and delivered this Guaranty.

            NOW, THEREFORE, in consideration of the premises and in order to
induce the Lenders to make Loans and the L/C Issuers to issue Letters of Credit
under the Credit Agreement and the Hedge Banks to enter into Secured Hedge
Agreements from time to time, the Guarantor hereby agrees as follows:

            Section 1. Guaranty. (a) The Guarantor hereby absolutely,
unconditionally and irrevocably guarantees the punctual payment when due,
whether at scheduled maturity or on any date of a required prepayment or by
acceleration, demand or otherwise, of all Obligations of each other Loan Party
now or hereafter existing under or in respect of the Loan Documents (including,
without limitation, any extensions, modifications, substitutions, amendments or
renewals of any or all of the foregoing Obligations), whether direct or
indirect, absolute or contingent, and whether for principal, interest, premiums,
fees, indemnities, contract causes of action, costs, expenses or otherwise (such
Obligations being the "GUARANTEED OBLIGATIONS"), and agrees to pay any and all
expenses (including, without limitation, fees and expenses of counsel) incurred
by the Administrative Agent or any other Secured Party in enforcing any rights
under this Guaranty or any other Loan Document. Without limiting the generality
of the foregoing, the Guarantor's liability shall extend to all amounts that
constitute part of the Guaranteed Obligations and would be owed by any other
Loan Party to any Secured Party under or in respect of the Loan Documents but
for the fact that they are unenforceable or not allowable due to the existence
of a bankruptcy, reorganization or similar proceeding involving such other Loan
Party.

            (b) The Guarantor hereby unconditionally and irrevocably agrees that
in the event any payment shall be required to be made to any Secured Party under
this Guaranty or the Subsidiary Guaranty or any other guaranty, the Guarantor
will contribute, to the maximum extent permitted by law, such amounts to each
other guarantor so as to maximize the aggregate amount paid to the Secured
Parties under or in respect of the Loan Documents.

<PAGE>

            Section 2. Guaranty Absolute. The Guarantor guarantees that the
Guaranteed Obligations will be paid strictly in accordance with the terms of the
Loan Documents, regardless of any law, regulation or order now or hereafter in
effect in any jurisdiction affecting any of such terms or the rights of any
Secured Party with respect thereto. The Obligations of the Guarantor under or in
respect of this Guaranty are independent of the Guaranteed Obligations or any
other Obligations of any other Loan Party under or in respect of the Loan
Documents, and a separate action or actions may be brought and prosecuted
against the Guarantor to enforce this Guaranty, irrespective of whether any
action is brought against the Borrower or any other Loan Party or whether the
Borrower or any other Loan Party is joined in any such action or actions. The
liability of the Guarantor under this Guaranty shall be irrevocable, absolute
and unconditional irrespective of, and the Guarantor hereby irrevocably waives
any defenses it may now have or hereafter acquire in any way relating to, any or
all of the following:

            (a) any lack of validity or enforceability of any Loan Document or
      any agreement or instrument relating thereto;

            (b) any change in the time, manner or place of payment of, or in any
      other term of, all or any of the Guaranteed Obligations or any other
      Obligations of any other Loan Party under or in respect of the Loan
      Documents, or any other amendment or waiver of or any consent to departure
      from any Loan Document, including, without limitation, any increase in the
      Guaranteed Obligations resulting from the extension of additional credit
      to any Loan Party or any of its Subsidiaries or otherwise;

            (c) any taking, exchange, release or non-perfection of any
      Collateral or any other collateral, or any taking, release or amendment or
      waiver of, or consent to departure from, any other guaranty, for all or
      any of the Guaranteed Obligations;

            (d) any manner of application of Collateral or any other collateral,
      or proceeds thereof, to all or any of the Guaranteed Obligations, or any
      manner of sale or other disposition of any Collateral or any other
      collateral for all or any of the Guaranteed Obligations or any other
      Obligations of any Loan Party under the Loan Documents or any other assets
      of any Loan Party or any of its Subsidiaries;

            (e) any change, restructuring or termination of the corporate
      structure or existence of any Loan Party or any of its Subsidiaries;

            (f) any failure of any Secured Party to disclose to any Loan Party
      any information relating to the business, condition (financial or
      otherwise), operations, performance, properties or prospects of any other
      Loan Party now or hereafter known to such Secured Party (the Guarantor
      waiving any duty on the part of the Secured Parties to disclose such
      information);

            (g) the failure of any other Person to execute or deliver any other
      guaranty or agreement or the release or reduction of liability of any
      other guarantor or surety with respect to the Guaranteed Obligations; or

            (h) any other circumstance (including, without limitation, any
      statute of limitations) or any existence of or reliance on any
      representation by any Secured Party

                                       2

<PAGE>

      that might otherwise constitute a defense available to, or a discharge of,
      any Loan Party or any other guarantor or surety (other than indefeasible
      payment in full of the Guaranteed Obligations).

This Guaranty shall continue to be effective or be reinstated, as the case may
be, if at any time any payment of any of the Guaranteed Obligations is rescinded
or must otherwise be returned by any Secured Party or any other Person upon the
insolvency, bankruptcy or reorganization of the Borrower or any other Loan Party
or otherwise, all as though such payment had not been made.

            Section 3. Waivers and Acknowledgments. (a) The Guarantor hereby
unconditionally and irrevocably waives promptness, diligence, notice of
acceptance, presentment, demand for performance, notice of nonperformance,
default, acceleration, protest or dishonor and any other notice with respect to
any of the Guaranteed Obligations and this Guaranty and any requirement that any
Secured Party protect, secure, perfect or insure any Lien or any property
subject thereto or exhaust any right or take any action against any Loan Party
or any other Person or any Collateral.

            (b) The Guarantor hereby unconditionally and irrevocably waives any
right to revoke this Guaranty and acknowledges that this Guaranty is continuing
in nature and applies to all Guaranteed Obligations, whether existing now or in
the future.

            (c) The Guarantor hereby unconditionally and irrevocably waives (i)
any defense arising by reason of any claim or defense based upon an election of
remedies by any Secured Party that in any manner impairs, reduces, releases or
otherwise adversely affects the subrogation, reimbursement, exoneration,
contribution or indemnification rights of the Guarantor or other rights of the
Guarantor to proceed against any of the other Loan Parties, any other guarantor
or any other Person or any Collateral and (ii) any defense based on any right of
set-off or counterclaim against or in respect of the Obligations of the
Guarantor hereunder.

            (d) The Guarantor acknowledges that the Collateral Agent may,
without notice to or demand upon the Guarantor and without affecting the
liability of the Guarantor under this Guaranty, foreclose under any mortgage by
nonjudicial sale, and the Guarantor hereby waives any defense to the recovery by
the Collateral Agent and the other Secured Parties against the Guarantor of any
deficiency after such nonjudicial sale and any defense or benefits that may be
afforded by applicable law.

            (e) The Guarantor hereby unconditionally and irrevocably waives any
duty on the part of any Secured Party to disclose to the Guarantor any matter,
fact or thing relating to the business, condition (financial or otherwise),
operations, performance, properties or prospects of any other Loan Party or any
of its Subsidiaries now or hereafter known by such Secured Party.

            (f) The Guarantor acknowledges that it will receive substantial
direct and indirect benefits from the financing arrangements contemplated by the
Loan Documents and that the waivers set forth in Section 2 and this Section 3
are knowingly made in contemplation of such benefits.

            Section 4. Subrogation. The Guarantor hereby unconditionally and
irrevocably agrees not to exercise any rights that it may now have or hereafter
acquire against the Borrower,

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any other Loan Party or any other insider guarantor that arise from the
existence, payment, performance or enforcement of the Guarantor's Obligations
under or in respect of this Guaranty or any other Loan Document, including,
without limitation, any right of subrogation, reimbursement, exoneration,
contribution or indemnification and any right to participate in any claim or
remedy of any Secured Party against the Borrower, any other Loan Party or any
other insider guarantor or any Collateral, whether or not such claim, remedy or
right arises in equity or under contract, statute or common law, including,
without limitation, the right to take or receive from the Borrower, any other
Loan Party or any other insider guarantor, directly or indirectly, in cash or
other property or by set-off or in any other manner, payment or security on
account of such claim, remedy or right, in each case unless and until all of the
Guaranteed Obligations and all other amounts payable under this Guaranty shall
have been paid in full in cash, all Letters of Credit and all Secured Hedge
Agreements shall have expired or been terminated and the Commitments shall have
expired or been terminated. If any amount shall be paid to the Guarantor in
violation of the immediately preceding sentence at any time prior to the latest
of (a) the payment in full in cash of the Guaranteed Obligations and all other
amounts payable under this Guaranty, (b) the Maturity Date and (c) the latest
date of expiration or termination of all Letters of Credit and all Secured Hedge
Agreements, such amount shall be received and held in trust for the benefit of
the Secured Parties, shall be segregated from other property and funds of the
Guarantor and shall forthwith be paid or delivered to the Administrative Agent
in the same form as so received (with any necessary endorsement or assignment)
to be credited and applied to the Guaranteed Obligations and all other amounts
payable under this Guaranty, whether matured or unmatured, in accordance with
the terms of the Loan Documents, or to be held as Collateral for any Guaranteed
Obligations and all other amounts payable under this Guaranty thereafter
arising. If (i) the Guarantor shall make payment to any Secured Party of all or
any part of the Guaranteed Obligations, (ii) all of the Guaranteed Obligations
and all other amounts payable under this Guaranty shall have been paid in full
in cash, (iii) the Maturity Date shall have occurred and (iv) all Letters of
Credit and all Secured Hedge Agreements shall have expired or been terminated,
the Secured Parties will, at the Guarantor's request and expense, execute and
deliver to the Guarantor appropriate documents, without recourse and without
representation or warranty, necessary to evidence the transfer by subrogation to
the Guarantor of an interest in the Guaranteed Obligations resulting from such
payment made by the Guarantor pursuant to this Guaranty.

            Section 5. Payments Free and Clear of Taxes, Etc. Any and all
payments made by the Guarantor under or in respect of this Guaranty or any other
Loan Document shall be made, free and clear of and without deduction for any and
all present or future Indemnified Taxes or Other Taxes on the same terms and to
the same extent that payments by the Borrower are required to be made free and
clear of Indemnified Taxes or Other Taxes pursuant to the terms of the Credit
Agreement.

            Section 6. Representations and Warranties. The Guarantor hereby
represents and warrants as follows:

            (a) There are no conditions precedent to the effectiveness of this
      Guaranty that have not been satisfied or waived.

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            (b) The Guarantor has, independently and without reliance upon any
      Secured Party and based on such documents and information as it has deemed
      appropriate, made its own credit analysis and decision to enter into this
      Guaranty and each other Loan Document to which it is or is to be a party,
      and the Guarantor has established adequate means of obtaining from each
      other Loan Party on a continuing basis information pertaining to, and is
      now and on a continuing basis will be completely familiar with, the
      business, condition (financial or otherwise), operations, performance,
      properties and prospects of such other Loan Party.

                                       5

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            Section 7. Covenants. The Guarantor covenants and agrees that, so
long as any part of the Guaranteed Obligations shall remain unpaid, any Letter
of Credit shall be outstanding, any Lender Party shall have any Commitment or
any Secured Hedge Agreement shall be in effect, the Guarantor will perform and
observe, and cause the Borrower and each of its Subsidiaries to perform and
observe, all of the terms, covenants and agreements set forth in the Loan
Documents on its or their part to be performed or observed or that the Borrower
has agreed to cause its Subsidiaries to perform or observe.

            Section 8. Amendments, Etc. No amendment, modification or waiver of
any provision of this Guaranty and no consent to any departure by the Guarantor
therefrom shall in any event be effective unless the same shall be in writing
and signed by the Administrative Agent and the Required Lenders and, in the case
of any amendment or modification, the Guarantor, and then such waiver or consent
shall be effective only in the specific instance and for the specific purpose
for which given; provided, however, that no amendment, waiver or consent shall,
unless in writing and signed by all of the Secured Parties (other than any
Lender Party that is, at such time, a Defaulting Lender), (a) reduce or limit
the obligations of the Guarantor hereunder, release the Guarantor hereunder or
otherwise limit the Guarantor's liability with respect to the Obligations owing
to the Secured Parties under or in respect of the Loan Documents, (b) postpone
any date fixed for payment hereunder or (c) change the number of Secured Parties
or the percentage of (x) the Commitments, (y) the aggregate unpaid principal
amount of the Loans or (z) the aggregate Available Amount of outstanding Letters
of Credit that, in each case, shall be required for the Secured Parties or any
of them to take any action hereunder.

            Section 9. Notices, Etc. All notices and other communications
provided for hereunder shall be in writing (including telegraphic, telecopy or
telex communication) and mailed, telegraphed, telecopied, telexed or delivered
to it, if to the Guarantor, addressed to it in care of the Borrower at the
Borrower's address specified in Schedule 10.02 of the Credit Agreement, if to
any Agent, at its address specified in Schedule 10.02 of the Credit Agreement,
if to any other Lender Party, at its address specified in its Administrative
Questionnaire, if to any Hedge Bank, at its address specified in the Secured
Hedge Agreement to which it is a party, or, as to any party, at such other
address as shall be designated by such party in a written notice to each other
party. All such notices and other communications shall, when mailed,
telegraphed, telecopied or telexed, be effective when deposited in the mails,
delivered to the telegraph company, transmitted by telecopier or confirmed by
telex answerback, respectively. Delivery by telecopier of an executed
counterpart of a signature page to any amendment or waiver of any provision of
this Guaranty shall be effective as delivery of an original executed counterpart
thereof.

            Section 10. No Waiver; Remedies. No failure on the part of any
Secured Party to exercise, and no delay in exercising, any right hereunder shall
operate as a waiver thereof; nor shall any single or partial exercise of any
right hereunder preclude any other or further exercise thereof or the exercise
of any other right. The remedies herein provided are cumulative and not
exclusive of any remedies provided by law.

            Section 11. Right of Set-off. Upon both (a) the occurrence and
during the continuance of any Event of Default and (b) the making of the request
or the granting of the

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consent specified by Section 8.02 of the Credit Agreement to authorize the
Administrative Agent to take the actions described therein, each Agent, each
Lender and each L/C Issuer and each of their respective Affiliates is hereby
authorized at any time and from time to time, to the fullest extent permitted by
law, to set off and apply any and all deposits (general or special, time or
demand, provisional or final) at any time held and other indebtedness at any
time owing by such Agent, such Lender, such L/C Issuer or such Affiliate to or
for the credit or the account of the Guarantor against any and all of the
Obligations of the Guarantor now or hereafter existing under the Loan Documents,
irrespective of whether such Agent, such Lender or such L/C Issuer shall have
made any demand under this Guaranty or any other Loan Document and although such
Obligations may be unmatured. Each Agent, each Lender and each L/C Issuer agrees
promptly to notify the Guarantor after any such set-off and application;
provided, however, that the failure to give such notice shall not affect the
validity of such set-off and application. The rights of each Agent and each
Lender Party and their respective Affiliates under this Section are in addition
to other rights and remedies (including, without limitation, other rights of
set-off) that such Agent, such Lender Party and their respective Affiliates may
have.

            Section 12. Indemnification. (a) Without limitation on any other
Obligations of the Guarantor or remedies of the Secured Parties under this
Guaranty, the Guarantor shall, to the fullest extent permitted by law,
indemnify, defend and save and hold harmless each Secured Party and each of
their Affiliates and their respective officers, directors, employees, agents and
advisors (each, an "INDEMNIFIED PARTY") from and against, and shall pay on
demand, any and all claims, damages, losses, liabilities and expenses
(including, without limitation, reasonable fees and expenses of counsel) that
may be incurred by or asserted or awarded against any Indemnified Party in
connection with or as a result of any failure of any Guaranteed Obligations to
be the legal, valid and binding obligations of any Loan Party enforceable
against such Loan Party in accordance with their terms.

            (b) The Guarantor hereby also agrees that none of the Indemnified
Parties shall have any liability (whether direct or indirect, in contract, tort
or otherwise) to the Guarantor or any of its Affiliates or any of their
respective officers, directors, employees, agents and advisors, and the
Guarantor hereby agrees not to assert any claim against any Indemnified Party on
any theory of liability, for special, indirect, consequential or punitive
damages arising out of or otherwise relating to the Facilities, the actual or
proposed use of the proceeds of the Loans or the Letters of Credit, the
Transaction Documents or any of the transactions contemplated by the Transaction
Documents.

            (c) Without prejudice to the survival of any of the other agreements
of the Guarantor under this Guaranty or any of the other Loan Documents, the
agreements and obligations of the Guarantor contained in Section 1(a) (with
respect to enforcement expenses), the last sentence of Section 2, Section 5 and
this Section 12 shall survive the payment in full of the Guaranteed Obligations
and all of the other amounts payable under this Guaranty.

                                       7

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            Section 13. Subordination. The Guarantor hereby subordinates any and
all debts, liabilities and other Obligations owed to the Guarantor by each other
Loan Party (the "SUBORDINATED OBLIGATIONS") to the Guaranteed Obligations to the
extent and in the manner hereinafter set forth in this Section 13:

            (a) Prohibited Payments, Etc. Except during the continuance of an
      Event of Default (including the commencement and continuation of any
      proceeding under any Bankruptcy Law relating to any other Loan Party), the
      Guarantor may receive payments from any other Loan Party on account of the
      Subordinated Obligations. After the occurrence and during the continuance
      of any Event of Default (including the commencement and continuation of
      any proceeding under any Bankruptcy Law relating to any other Loan Party),
      however, unless the Administrative Agent otherwise agrees and except with
      respect to transactions between and among Loan Parties that are not by the
      terms of the Credit Agreement prohibited from being consummated after the
      occurrence of an Event of Default, the Guarantor shall not demand, accept
      or take any action to collect any payment on account of the Subordinated
      Obligations.

            (b) Prior Payment of Guaranteed Obligations. In any proceeding under
      any Bankruptcy Law relating to any other Loan Party, the Guarantor agrees
      that the Secured Parties shall be entitled to receive payment in full in
      cash of all Guaranteed Obligations (including all interest and expenses
      accruing after the commencement of a proceeding under any Bankruptcy Law,
      whether or not constituting an allowed claim in such proceeding ("POST
      PETITION INTEREST")) before the Guarantor receives payment of any
      Subordinated Obligations.

            (c) Turn-Over. After the occurrence and during the continuance of
      any Event of Default (including the commencement and continuation of any
      proceeding under any Bankruptcy Law relating to any other Loan Party), the
      Guarantor shall, if the Administrative Agent so requests and except with
      respect to transactions between and among Loan Parties that are not by the
      terms of the Credit Agreement prohibited from being consummated after the
      occurrence of an Event of Default, collect, enforce and receive payments
      on account of the Subordinated Obligations as trustee for the Secured
      Parties and deliver such payments to the Administrative Agent on account
      of the Guaranteed Obligations (including all Post Petition Interest),
      together with any necessary endorsements or other instruments of transfer,
      but without reducing or affecting in any manner the liability of the
      Guarantor under the other provisions of this Guaranty.

            (d) Administrative Agent Authorization. After the occurrence and
      during the continuance of any Event of Default (including the commencement
      and continuation of any proceeding under any Bankruptcy Law relating to
      any other Loan Party), the Administrative Agent is authorized and
      empowered (but without any obligation to so do), in its discretion, (i) in
      the name of the Guarantor, to collect and enforce, and to submit claims in
      respect of, Subordinated Obligations and to apply any amounts received
      thereon to the Guaranteed Obligations (including any and all Post Petition
      Interest), and (ii) to require the Guarantor (A) to collect and enforce,
      and to submit claims in respect of, Subordinated Obligations and (B) to
      pay any amounts received on such obligations to the Administrative Agent
      for application to the Guaranteed Obligations (including any and

                                       8

<PAGE>

      all Post Petition Interest).

            Section 14. Continuing Guaranty; Assignments under the Credit
Agreement. This Guaranty is a continuing guaranty and shall (a) remain in full
force and effect until the latest of (i) the payment in full in cash of the
Guaranteed Obligations and all other amounts payable under this Guaranty, (ii)
the Maturity Date and (iii) the latest date of expiration or termination of all
Letters of Credit and all Secured Hedge Agreements, (b) be binding upon the
Guarantor, its successors and assigns and (c) inure to the benefit of and be
enforceable by the Secured Parties and their successors, transferees and
assigns. Without limiting the generality of clause (c) of the immediately
preceding sentence, any Secured Party may assign or otherwise transfer all or
any portion of its rights and obligations under the Credit Agreement (including,
without limitation, all or any portion of its Commitments, the Loans owing to it
and the Note or Notes held by it) subject to compliance with Section 10.06 of
the Credit Agreement, and each such permitted assignee or transferee shall
thereupon become vested with all the benefits in respect thereof granted to such
Secured Party herein or otherwise, in each case as and to the extent provided in
Section 10.06 of the Credit Agreement. The Guarantor shall not have the right to
assign its rights hereunder or any interest herein without the prior written
consent of the Secured Parties.

            Section 15. Execution in Counterparts. This Guaranty and each
amendment, waiver and consent with respect hereto may be executed in any number
of counterparts and by different parties thereto in separate counterparts, each
of which when so executed shall be deemed to be an original and all of which
taken together shall constitute one and the same agreement. Delivery of an
executed counterpart of a signature page to this Guaranty by telecopier shall be
effective as delivery of an original executed counterpart of this Guaranty.

            Section 16. Governing Law; Jurisdiction; Waiver of Jury Trial, Etc.
(a) This Guaranty shall be governed by, and construed in accordance with, the
laws of the State of New York.

            (b) The Guarantor hereby irrevocably and unconditionally submits,
for itself and its property, to the nonexclusive jurisdiction of any New York
State court or federal court of the United States of America sitting in New York
City, and any appellate court from any thereof, in any action or proceeding
arising out of or relating to this Guaranty or any of the other Loan Documents
to which it is or is to be a party, or for recognition or enforcement of any
judgment, and the Guarantor hereby irrevocably and unconditionally agrees that
all claims in respect of any such action or proceeding may be heard and
determined in any such New York State court or, to the extent permitted by law,
in such federal court. The Guarantor agrees that a final judgment in any such
action or proceeding shall be conclusive and may be enforced in other
jurisdictions by suit on the judgment or in any other manner provided by law.
Nothing in this Guaranty or any other Loan Document shall affect any right that
any party may otherwise have to bring any action or proceeding relating to this
Guaranty or any other Loan Document in the courts of any jurisdiction.

            (c) The Guarantor irrevocably and unconditionally waives, to the
fullest extent it may legally and effectively do so, any objection that it may
now or hereafter have to the laying of venue of any suit, action or proceeding
arising out of or relating to this Guaranty or any of the other Loan Documents
to which it is or is to be a party in any New York State or federal court.

                                       9

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The Guarantor hereby irrevocably waives, to the fullest extent permitted by law,
the defense of an inconvenient forum to the maintenance of such suit, action or
proceeding in any such court.

            (d) THE GUARANTOR HEREBY IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY
JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM (WHETHER BASED ON CONTRACT, TORT
OR OTHERWISE) ARISING OUT OF OR RELATING TO ANY OF THE LOAN DOCUMENTS, THE LOANS
OR THE ACTIONS OF ANY SECURED PARTY IN THE NEGOTIATION, ADMINISTRATION,
PERFORMANCE OR ENFORCEMENT THEREOF.

                                       10

<PAGE>

            IN WITNESS WHEREOF, the Guarantor has caused this Guaranty to be
duly executed and delivered by its officer thereunto duly authorized as of the
date first above written.

                                              LEAP WIRELESS INTERNATIONAL, INC.

                                              By:  /s/ S. Douglas Hutcheson
                                              Name: S. Douglas Hutcheson
                                              Title: Chief Financial Officer<PAGE>

                                                                    EXHIBIT 10.4

                               SUBSIDIARY GUARANTY

                          Dated as of January 10, 2005

                                      From

                           THE GUARANTORS NAMED HEREIN

                                       and

                  THE ADDITIONAL GUARANTORS REFERRED TO HEREIN

                                  as Guarantors

                                   in favor of

                       THE SECURED PARTIES REFERRED TO IN
                     THE CREDIT AGREEMENT REFERRED TO HEREIN
<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
SECTION                                                                                                      PAGE
<S>                                                                                                          <C>
Section 1.   Guaranty; Limitation of Liability................................................                1
Section 2.   Guaranty Absolute................................................................                2
Section 3.   Waivers and Acknowledgments......................................................                3
Section 4.   Subrogation......................................................................                4
Section 5.   Payments Free and Clear of Taxes, Etc. ..........................................                5
Section 6.   Representations and Warranties...................................................                5
Section 7.   Covenants........................................................................                5
Section 8.   Amendments, Guaranty Supplements, Etc. ..........................................                5
Section 9.   Notices, Etc. ...................................................................                6
Section 10.  No Waiver; Remedies..............................................................                6
Section 11.  Right of Set-off.................................................................                6
Section 12.  Indemnification..................................................................                7
Section 13.  Subordination....................................................................                7
Section 14.  Continuing Guaranty; Assignments under the Credit Agreement......................                8
Section 15.  Execution in Counterparts........................................................                9
Section 16.  Governing Law; Jurisdiction; Waiver of Jury Trial, Etc. .........................                9
</TABLE>

Exhibit A -  Guaranty Supplement
<PAGE>

                               SUBSIDIARY GUARANTY

            SUBSIDIARY GUARANTY dated as of January 10, 2005 made by the Persons
listed on the signature pages hereof under the caption "Subsidiary Guarantors"
and the Additional Guarantors (as defined in Section 8(b)) (such Persons so
listed and the Additional Guarantors being, collectively, the "GUARANTORS" and,
individually, each a "GUARANTOR") in favor of the Secured Parties (as defined in
the Credit Agreement referred to below).

            PRELIMINARY STATEMENT. Cricket Communications, Inc., a Delaware
corporation (the "BORROWER"), is party to a Credit Agreement dated as of January
10, 2005 (as amended, amended and restated, supplemented or otherwise modified
from time to time, the "CREDIT AGREEMENT"; the capitalized terms defined therein
and not otherwise defined herein being used herein as therein defined) with
certain Lender Parties party thereto and Bank of America, N.A., as
Administrative Agent for such Lender Parties. Each Guarantor may receive,
directly or indirectly, a portion of the proceeds of the Loans under the Credit
Agreement and will derive substantial direct and indirect benefits from the
transactions contemplated by the Credit Agreement. It is a condition precedent
to the making of Loans and the issuance of Letters of Credit by the Lender
Parties under the Credit Agreement and the entry by the Hedge Banks into Secured
Hedge Agreements from time to time that each Guarantor shall have executed and
delivered this Guaranty.

            NOW, THEREFORE, in consideration of the premises and in order to
induce the Lenders to make Loans and the L/C Issuers to issue Letters of Credit
under the Credit Agreement and the Hedge Banks to enter into Secured Hedge
Agreements from time to time, each Guarantor, jointly and severally with each
other Guarantor, hereby agrees as follows:

            Section 1. Guaranty; Limitation of Liability. (a) Each Guarantor
hereby absolutely, unconditionally and irrevocably guarantees the punctual
payment when due, whether at scheduled maturity or on any date of a required
prepayment or by acceleration, demand or otherwise, of all Obligations of each
other Loan Party now or hereafter existing under or in respect of the Loan
Documents (including, without limitation, any extensions, modifications,
substitutions, amendments or renewals of any or all of the foregoing
Obligations), whether direct or indirect, absolute or contingent, and whether
for principal, interest, premiums, fees, indemnities, contract causes of action,
costs, expenses or otherwise (such Obligations being the "GUARANTEED
OBLIGATIONS"), and agrees to pay any and all expenses (including, without
limitation, fees and expenses of counsel) incurred by the Administrative Agent
or any other Secured Party in enforcing any rights under this Guaranty or any
other Loan Document. Without limiting the generality of the foregoing, each
Guarantor's liability shall extend to all amounts that constitute part of the
Guaranteed Obligations and would be owed by any other Loan Party to any Secured
Party under or in respect of the Loan Documents but for the fact that they are
unenforceable or not allowable due to the existence of a bankruptcy,
reorganization or similar proceeding involving such other Loan Party.

            (b) Each Guarantor, and by its acceptance of this Guaranty, the
Administrative Agent and each other Secured Party, hereby confirms that it is
the intention of all such Persons that this Guaranty and the Obligations of each
Guarantor hereunder not constitute a fraudulent transfer or conveyance for
purposes of Bankruptcy Law (as hereinafter defined), the

<PAGE>

Uniform Fraudulent Conveyance Act, the Uniform Fraudulent Transfer Act or any
similar foreign, federal or state law to the extent applicable to this Guaranty
and the Obligations of each Guarantor hereunder. To effectuate the foregoing
intention, the Administrative Agent, the other Secured Parties and the
Guarantors hereby irrevocably agree that the Obligations of each Guarantor under
this Guaranty at any time shall be limited to the maximum amount as will result
in the Obligations of such Guarantor under this Guaranty not constituting a
fraudulent transfer or conveyance. For purposes hereof, "BANKRUPTCY LAW" means
any proceeding of the type referred to in Section 8.01(f) of the Credit
Agreement or Title 11, U.S. Code, or any similar foreign, federal or state law
for the relief of debtors.

            (c) Each Guarantor hereby unconditionally and irrevocably agrees
that in the event any payment shall be required to be made to any Secured Party
under this Guaranty or the Parent Guaranty or any other guaranty, such Guarantor
will contribute, to the maximum extent permitted by law, such amounts to each
other Guarantor and Holdings and each other guarantor so as to maximize the
aggregate amount paid to the Secured Parties under or in respect of the Loan
Documents.

            Section 2. Guaranty Absolute. Each Guarantor guarantees that the
Guaranteed Obligations will be paid strictly in accordance with the terms of the
Loan Documents, regardless of any law, regulation or order now or hereafter in
effect in any jurisdiction affecting any of such terms or the rights of any
Secured Party with respect thereto. The Obligations of each Guarantor under or
in respect of this Guaranty are independent of the Guaranteed Obligations or any
other Obligations of any other Loan Party under or in respect of the Loan
Documents, and a separate action or actions may be brought and prosecuted
against each Guarantor to enforce this Guaranty, irrespective of whether any
action is brought against the Borrower or any other Loan Party or whether the
Borrower or any other Loan Party is joined in any such action or actions. The
liability of each Guarantor under this Guaranty shall be irrevocable, absolute
and unconditional irrespective of, and each Guarantor hereby irrevocably waives
any defenses it may now have or hereafter acquire in any way relating to, any or
all of the following:

            (a) any lack of validity or enforceability of any Loan Document or
      any agreement or instrument relating thereto;

            (b) any change in the time, manner or place of payment of, or in any
      other term of, all or any of the Guaranteed Obligations or any other
      Obligations of any other Loan Party under or in respect of the Loan
      Documents, or any other amendment or waiver of or any consent to departure
      from any Loan Document, including, without limitation, any increase in the
      Guaranteed Obligations resulting from the extension of additional credit
      to any Loan Party or any of its Subsidiaries or otherwise;

            (c) any taking, exchange, release or non-perfection of any
      Collateral or any other collateral, or any taking, release or amendment or
      waiver of, or consent to departure from, any other guaranty, for all or
      any of the Guaranteed Obligations;

            (d) any manner of application of Collateral or any other collateral,
      or proceeds thereof, to all or any of the Guaranteed Obligations, or any
      manner of sale or other disposition of any Collateral or any other
      collateral for all or any of the Guaranteed

                                       2
<PAGE>

      Obligations or any other Obligations of any Loan Party under the Loan
      Documents or any other assets of any Loan Party or any of its
      Subsidiaries;

            (e) any change, restructuring or termination of the corporate
      structure or existence of any Loan Party or any of its Subsidiaries;

            (f) any failure of any Secured Party to disclose to any Loan Party
      any information relating to the business, condition (financial or
      otherwise), operations, performance, properties or prospects of any other
      Loan Party now or hereafter known to such Secured Party (each Guarantor
      waiving any duty on the part of the Secured Parties to disclose such
      information);

            (g) the failure of any other Person to execute or deliver this
      Guaranty, any Guaranty Supplement (as hereinafter defined) or any other
      guaranty or agreement or the release or reduction of liability of any
      Guarantor or other guarantor or surety with respect to the Guaranteed
      Obligations; or

            (h) any other circumstance (including, without limitation, any
      statute of limitations) or any existence of or reliance on any
      representation by any Secured Party that might otherwise constitute a
      defense available to, or a discharge of, any Loan Party or any other
      guarantor or surety (other than indefeasible payment in full of the
      Guaranteed Obligations).

This Guaranty shall continue to be effective or be reinstated, as the case may
be, if at any time any payment of any of the Guaranteed Obligations is rescinded
or must otherwise be returned by any Secured Party or any other Person upon the
insolvency, bankruptcy or reorganization of the Borrower or any other Loan Party
or otherwise, all as though such payment had not been made.

            Section 3. Waivers and Acknowledgments. (a) Each Guarantor hereby
unconditionally and irrevocably waives promptness, diligence, notice of
acceptance, presentment, demand for performance, notice of nonperformance,
default, acceleration, protest or dishonor and any other notice with respect to
any of the Guaranteed Obligations and this Guaranty and any requirement that any
Secured Party protect, secure, perfect or insure any Lien or any property
subject thereto or exhaust any right or take any action against any Loan Party
or any other Person or any Collateral.

            (b) Each Guarantor hereby unconditionally and irrevocably waives any
right to revoke this Guaranty and acknowledges that this Guaranty is continuing
in nature and applies to all Guaranteed Obligations, whether existing now or in
the future.

            (c) Each Guarantor hereby unconditionally and irrevocably waives (i)
any defense arising by reason of any claim or defense based upon an election of
remedies by any Secured Party that in any manner impairs, reduces, releases or
otherwise adversely affects the subrogation, reimbursement, exoneration,
contribution or indemnification rights of such Guarantor or other rights of such
Guarantor to proceed against any of the other Loan Parties, any other guarantor
or any other Person or any Collateral and (ii) any defense based on any right of
set-off or counterclaim against or in respect of the Obligations of such
Guarantor hereunder.

                                       3
<PAGE>

            (d) Each Guarantor acknowledges that the Collateral Agent may,
without notice to or demand upon such Guarantor and without affecting the
liability of such Guarantor under this Guaranty, foreclose under any mortgage by
nonjudicial sale, and each Guarantor hereby waives any defense to the recovery
by the Collateral Agent and the other Secured Parties against such Guarantor of
any deficiency after such nonjudicial sale and any defense or benefits that may
be afforded by applicable law.

            (e) Each Guarantor hereby unconditionally and irrevocably waives any
duty on the part of any Secured Party to disclose to such Guarantor any matter,
fact or thing relating to the business, condition (financial or otherwise),
operations, performance, properties or prospects of any other Loan Party or any
of its Subsidiaries now or hereafter known by such Secured Party.

            (f) Each Guarantor acknowledges that it will receive substantial
direct and indirect benefits from the financing arrangements contemplated by the
Loan Documents and that the waivers set forth in Section 2 and this Section 3
are knowingly made in contemplation of such benefits.

            Section 4. Subrogation. Each Guarantor hereby unconditionally and
irrevocably agrees not to exercise any rights that it may now have or hereafter
acquire against the Borrower, any other Loan Party or any other insider
guarantor that arise from the existence, payment, performance or enforcement of
such Guarantor's Obligations under or in respect of this Guaranty or any other
Loan Document, including, without limitation, any right of subrogation,
reimbursement, exoneration, contribution or indemnification and any right to
participate in any claim or remedy of any Secured Party against the Borrower,
any other Loan Party or any other insider guarantor or any Collateral, whether
or not such claim, remedy or right arises in equity or under contract, statute
or common law, including, without limitation, the right to take or receive from
the Borrower, any other Loan Party or any other insider guarantor, directly or
indirectly, in cash or other property or by set-off or in any other manner,
payment or security on account of such claim, remedy or right, in each case
unless and until all of the Guaranteed Obligations and all other amounts payable
under this Guaranty shall have been paid in full in cash, all Letters of Credit
and all Secured Hedge Agreements shall have expired or been terminated and the
Commitments shall have expired or been terminated. If any amount shall be paid
to any Guarantor in violation of the immediately preceding sentence at any time
prior to the latest of (a) the payment in full in cash of the Guaranteed
Obligations and all other amounts payable under this Guaranty, (b) the Maturity
Date and (c) the latest date of expiration or termination of all Letters of
Credit and all Secured Hedge Agreements, such amount shall be received and held
in trust for the benefit of the Secured Parties, shall be segregated from other
property and funds of such Guarantor and shall forthwith be paid or delivered to
the Administrative Agent in the same form as so received (with any necessary
endorsement or assignment) to be credited and applied to the Guaranteed
Obligations and all other amounts payable under this Guaranty, whether matured
or unmatured, in accordance with the terms of the Loan Documents, or to be held
as Collateral for any Guaranteed Obligations and all other amounts payable under
this Guaranty thereafter arising. If (i) any Guarantor shall make payment to any
Secured Party of all or any part of the Guaranteed Obligations, (ii) all of the
Guaranteed Obligations and all other amounts payable under this Guaranty shall
have been paid in full in cash, (iii) the Maturity Date shall have occurred and
(iv) all Letters of Credit and all Secured Hedge Agreements shall have

                                       4
<PAGE>

expired or been terminated, the Secured Parties will, at such Guarantor's
request and expense, execute and deliver to such Guarantor appropriate
documents, without recourse and without representation or warranty, necessary to
evidence the transfer by subrogation to such Guarantor of an interest in the
Guaranteed Obligations resulting from such payment made by such Guarantor
pursuant to this Guaranty.

            Section 5. Payments Free and Clear of Taxes, Etc. Any and all
payments made by each Guarantor under or in respect of this Guaranty or any
other Loan Document shall be made, free and clear of and without deduction for
any and all present or future Indemnified Taxes or Other Taxes on the same terms
and to the same extent that payments by the Borrower are required to be made
free and clear of Indemnified Taxes or Other Taxes pursuant to the terms of the
Credit Agreement.

            Section 6. Representations and Warranties. Each Guarantor hereby
makes each representation and warranty made in the Loan Documents by the
Borrower with respect to such Guarantor and each Guarantor hereby further
represents and warrants as follows:

            (a) There are no conditions precedent to the effectiveness of this
      Guaranty that have not been satisfied or waived.

            (b) Such Guarantor has, independently and without reliance upon any
      Secured Party and based on such documents and information as it has deemed
      appropriate, made its own credit analysis and decision to enter into this
      Guaranty and each other Loan Document to which it is or is to be a party,
      and such Guarantor has established adequate means of obtaining from each
      other Loan Party on a continuing basis information pertaining to, and is
      now and on a continuing basis will be completely familiar with, the
      business, condition (financial or otherwise), operations, performance,
      properties and prospects of such other Loan Party.

            Section 7. Covenants. Each Guarantor covenants and agrees that, so
long as any part of the Guaranteed Obligations shall remain unpaid, any Letter
of Credit shall be outstanding, any Lender Party shall have any Commitment or
any Secured Hedge Agreement shall be in effect, such Guarantor will perform and
observe, and cause each of its Subsidiaries to perform and observe, all of the
terms, covenants and agreements set forth in the Loan Documents on its or their
part to be performed or observed or that the Borrower has agreed to cause such
Guarantor or such Subsidiaries to perform or observe.

            Section 8. Amendments, Guaranty Supplements, Etc. (a) No amendment,
modification or waiver of any provision of this Guaranty and no consent to any
departure by any Guarantor therefrom shall in any event be effective unless the
same shall be in writing and signed by the Administrative Agent and the Required
Lenders and, in the case of an amendment or modification, the Guarantors, and
then such waiver or consent shall be effective only in the specific instance and
for the specific purpose for which given; provided, however, that no amendment,
modification, waiver or consent shall, unless in writing and signed by all of
the Secured Parties (other than any Lender Party that is, at such time, a
Defaulting Lender), (a) reduce or limit the obligations of any Guarantor
hereunder, release any Guarantor hereunder or otherwise limit any Guarantor's
liability with respect to the Obligations owing to the Secured

                                       5
<PAGE>

Parties under or in respect of the Loan Documents, (b) postpone any date fixed
for payment hereunder or (c) change the number of Secured Parties or the
percentage of (x) the Commitments, (y) the aggregate unpaid principal amount of
the Loans or (z) the aggregate Available Amount of outstanding Letters of Credit
that, in each case, shall be required for the Secured Parties or any of them to
take any action hereunder.

            (b) Upon the execution and delivery by any Person of a guaranty
supplement in substantially the form of Exhibit A hereto (each, a "GUARANTY
SUPPLEMENT"), (i) such Person shall be referred to as an "ADDITIONAL GUARANTOR"
and shall become and be a Guarantor hereunder, and each reference in this
Guaranty to a "GUARANTOR" shall also mean and be a reference to such Additional
Guarantor, and each reference in any other Loan Document to a "SUBSIDIARY
GUARANTOR" shall also mean and be a reference to such Additional Guarantor, and
(ii) each reference herein to "THIS GUARANTY", "HEREUNDER", "HEREOF" or words of
like import referring to this Guaranty, and each reference in any other Loan
Document to the "SUBSIDIARY GUARANTY", "THEREUNDER", "THEREOF" or words of like
import referring to this Guaranty, shall mean and be a reference to this
Guaranty as supplemented by such Guaranty Supplement.

            Section 9. Notices, Etc. All notices and other communications
provided for hereunder shall be in writing (including telegraphic, telecopy or
telex communication) and mailed, telegraphed, telecopied, telexed or delivered
to it, if to any Guarantor, addressed to it in care of the Borrower at the
Borrower's address specified in Schedule 10.02 of the Credit Agreement, if to
any Agent, at its address specified in Schedule 10.02 of the Credit Agreement,
if to any other Lender Party, at its address specified in its Administrative
Questionnaire, if to any Hedge Bank, at its address specified in the Secured
Hedge Agreement to which it is a party, or, as to any party, at such other
address as shall be designated by such party in a written notice to each other
party. All such notices and other communications shall, when mailed,
telegraphed, telecopied or telexed, be effective when deposited in the mails,
delivered to the telegraph company, transmitted by telecopier or confirmed by
telex answerback, respectively. Delivery by telecopier of an executed
counterpart of a signature page to any amendment or waiver of any provision of
this Guaranty or of any Guaranty Supplement to be executed and delivered
hereunder shall be effective as delivery of an original executed counterpart
thereof.

            Section 10. No Waiver; Remedies. No failure on the part of any
Secured Party to exercise, and no delay in exercising, any right hereunder shall
operate as a waiver thereof; nor shall any single or partial exercise of any
right hereunder preclude any other or further exercise thereof or the exercise
of any other right. The remedies herein provided are cumulative and not
exclusive of any remedies provided by law.

            Section 11. Right of Set-off. Upon both (a) the occurrence and
during the continuance of any Event of Default and (b) the making of the request
or the granting of the consent specified by Section 8.2 of the Credit Agreement
to authorize the Administrative Agent to take the actions described therein,
each Agent, each Lender and each L/C Issuer and each of their respective
Affiliates is hereby authorized at any time and from time to time, to the
fullest extent permitted by law, to set off and apply any and all deposits
(general or special, time or demand, provisional or final) at any time held and
other indebtedness at any time owing by such Agent, such Lender or such L/C
Issuer or such Affiliate to or for the credit or the account of any Guarantor
against any and all of the Obligations of such Guarantor now or hereafter
existing

                                       6
<PAGE>

under the Loan Documents, irrespective of whether such Agent, such Lender or
such L/C Issuer shall have made any demand under this Guaranty or any other Loan
Document and although such Obligations may be unmatured. Each Agent, each Lender
and each L/C Issuer agrees promptly to notify such Guarantor after any such
set-off and application; provided, however, that the failure to give such notice
shall not affect the validity of such set-off and application. The rights of
each Agent, each Lender and each L/C Issuer and their respective Affiliates
under this Section are in addition to other rights and remedies (including,
without limitation, other rights of set-off) that such Agent, such Lender, such
L/C Issuer and their respective Affiliates may have.

            Section 12. Indemnification. (a) Without limitation on any other
Obligations of any Guarantor or remedies of the Secured Parties under this
Guaranty, each Guarantor shall, to the fullest extent permitted by law,
indemnify, defend and save and hold harmless each Secured Party and each of
their Affiliates and their respective officers, directors, employees, agents and
advisors (each, an "INDEMNIFIED PARTY") from and against, and shall pay on
demand, any and all claims, damages, losses, liabilities and expenses
(including, without limitation, reasonable fees and expenses of counsel) that
may be incurred by or asserted or awarded against any Indemnified Party in
connection with or as a result of any failure of any Guaranteed Obligations to
be the legal, valid and binding obligations of any Loan Party enforceable
against such Loan Party in accordance with their terms.

            (b) Each Guarantor hereby also agrees that none of the Indemnified
Parties shall have any liability (whether direct or indirect, in contract, tort
or otherwise) to any of the Guarantors or any of their respective Affiliates or
any of their respective officers, directors, employees, agents and advisors, and
each Guarantor hereby agrees not to assert any claim against any Indemnified
Party on any theory of liability, for special, indirect, consequential or
punitive damages arising out of or otherwise relating to the Facilities, the
actual or proposed use of the proceeds of the Loans or the Letters of Credit,
the Transaction Documents or any of the transactions contemplated by the
Transaction Documents.

            (c) Without prejudice to the survival of any of the other agreements
of any Guarantor under this Guaranty or any of the other Loan Documents, the
agreements and obligations of each Guarantor contained in Section 1(a) (with
respect to enforcement expenses), the last sentence of Section 2, Section 5 and
this Section 12 shall survive the payment in full of the Guaranteed Obligations
and all of the other amounts payable under this Guaranty.

            Section 13. Subordination. Each Guarantor hereby subordinates any
and all debts, liabilities and other Obligations owed to such Guarantor by each
other Loan Party (the "SUBORDINATED OBLIGATIONS") to the Guaranteed Obligations
to the extent and in the manner hereinafter set forth in this Section 13:

            (a) Prohibited Payments, Etc. Except during the continuance of an
      Event of Default (including the commencement and continuation of any
      proceeding under any Bankruptcy Law relating to any other Loan Party),
      each Guarantor may receive payments from any other Loan Party on account
      of the Subordinated Obligations. After the occurrence and during the
      continuance of any Event of Default (including the commencement and
      continuation of any proceeding under any Bankruptcy Law relating to any
      other Loan Party), however, unless the Administrative Agent otherwise
      agrees and

                                        7
<PAGE>

      except with respect to transactions between and among Loan Parties that
      are not by the terms of the Credit Agreement prohibited from being
      consummated after the occurrence of an Event of Default, no Guarantor
      shall demand, accept or take any action to collect any payment on account
      of the Subordinated Obligations.

            (b) Prior Payment of Guaranteed Obligations. In any proceeding under
      any Bankruptcy Law relating to any other Loan Party, each Guarantor agrees
      that the Secured Parties shall be entitled to receive payment in full in
      cash of all Guaranteed Obligations (including all interest and expenses
      accruing after the commencement of a proceeding under any Bankruptcy Law,
      whether or not constituting an allowed claim in such proceeding ("POST
      PETITION INTEREST")) before such Guarantor receives payment of any
      Subordinated Obligations.

            (c) Turn-Over. After the occurrence and during the continuance of an
      Event of Default (including the commencement and continuation of any
      proceeding under any Bankruptcy Law relating to any other Loan Party),
      each Guarantor shall, if the Administrative Agent so requests and except
      with respect to transactions between and among Loan Parties that are not
      by the terms of the Credit Agreement prohibited from being consummated
      after the occurrence of an Event of Default, collect, enforce and receive
      payments on account of the Subordinated Obligations as trustee for the
      Secured Parties and deliver such payments to the Administrative Agent on
      account of the Guaranteed Obligations (including all Post Petition
      Interest), together with any necessary endorsements or other instruments
      of transfer, but without reducing or affecting in any manner the liability
      of such Guarantor under the other provisions of this Guaranty.

            (d) Administrative Agent Authorization. After the occurrence and
      during the continuance of any Event of Default (including the commencement
      and continuation of any proceeding under any Bankruptcy Law relating to
      any other Loan Party), the Administrative Agent is authorized and
      empowered (but without any obligation to so do), in its discretion, (i) in
      the name of each Guarantor, to collect and enforce, and to submit claims
      in respect of, Subordinated Obligations and to apply any amounts received
      thereon to the Guaranteed Obligations (including any and all Post Petition
      Interest), and (ii) to require each Guarantor (A) to collect and enforce,
      and to submit claims in respect of, Subordinated Obligations and (B) to
      pay any amounts received on such obligations to the Administrative Agent
      for application to the Guaranteed Obligations (including any and all Post
      Petition Interest).

            Section 14. Release of Guaranty. The Administrative Agent agrees to
deliver, at the Borrower's expense, such documents as may be reasonably
necessary to evidence the release of a Guarantor from its obligations hereunder,
on the terms set forth in and to the extent permitted by Section 9.10 of the
Credit Agreement.

            Section 15. Continuing Guaranty; Assignments under the Credit
Agreement. This Guaranty is a continuing guaranty and shall (a) remain in full
force and effect until the latest of (i) the payment in full in cash of the
Guaranteed Obligations and all other amounts payable under this Guaranty, (ii)
the Maturity Date and (iii) the latest date of expiration or termination of all
Letters of Credit and all Secured Hedge Agreements, (b) be binding upon the
Guarantor, its

                                       8
<PAGE>

successors and assigns and (c) inure to the benefit of and be enforceable by the
Secured Parties and their successors, transferees and assigns. Without limiting
the generality of clause (c) of the immediately preceding sentence, any Secured
Party may assign or otherwise transfer all or any portion of its rights and
obligations under the Credit Agreement (including, without limitation, all or
any portion of its Commitments, the Loans owing to it and the Note or Notes held
by it) subject to compliance with Section 10.06 of the Credit Agreement, and
each such permitted assignee or transferee shall thereupon become vested with
all the benefits in respect thereof granted to such Secured Party herein or
otherwise, in each case as and to the extent provided in Section 10.06 of the
Credit Agreement. No Guarantor shall have the right to assign its rights
hereunder or any interest herein without the prior written consent of the
Secured Parties.

            Section 16. Execution in Counterparts. This Guaranty and each
amendment, waiver and consent with respect hereto may be executed in any number
of counterparts and by different parties thereto in separate counterparts, each
of which when so executed shall be deemed to be an original and all of which
taken together shall constitute one and the same agreement. Delivery of an
executed counterpart of a signature page to this Guaranty by telecopier shall be
effective as delivery of an original executed counterpart of this Guaranty.

            Section 17. Governing Law; Jurisdiction; Waiver of Jury Trial, Etc.
(a) This Guaranty shall be governed by, and construed in accordance with, the
laws of the State of New York.

            (b) Each Guarantor hereby irrevocably and unconditionally submits,
for itself and its property, to the nonexclusive jurisdiction of any New York
State court or federal court of the United States of America sitting in New York
City, and any appellate court from any thereof, in any action or proceeding
arising out of or relating to this Guaranty or any of the other Loan Documents
to which it is or is to be a party, or for recognition or enforcement of any
judgment, and each Guarantor hereby irrevocably and unconditionally agrees that
all claims in respect of any such action or proceeding may be heard and
determined in any such New York State court or, to the extent permitted by law,
in such federal court. Each Guarantor agrees that a final judgment in any such
action or proceeding shall be conclusive and may be enforced in other
jurisdictions by suit on the judgment or in any other manner provided by law.
Nothing in this Guaranty or any other Loan Document shall affect any right that
any party may otherwise have to bring any action or proceeding relating to this
Guaranty or any other Loan Document in the courts of any jurisdiction.

            (c) Each Guarantor irrevocably and unconditionally waives, to the
fullest extent it may legally and effectively do so, any objection that it may
now or hereafter have to the laying of venue of any suit, action or proceeding
arising out of or relating to this Guaranty or any of the other Loan Documents
to which it is or is to be a party in any New York State or federal court. Each
Guarantor hereby irrevocably waives, to the fullest extent permitted by law, the
defense of an inconvenient forum to the maintenance of such suit, action or
proceeding in any such court.

            (d) EACH GUARANTOR HEREBY IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY
JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM (WHETHER BASED ON CONTRACT, TORT
OR OTHERWISE) ARISING OUT OF OR

                                       9
<PAGE>

RELATING TO ANY OF THE LOAN DOCUMENTS, THE LOANS OR THE ACTIONS OF ANY SECURED
PARTY IN THE NEGOTIATION, ADMINISTRATION, PERFORMANCE OR ENFORCEMENT THEREOF.

                                       10
<PAGE>

            IN WITNESS WHEREOF, each Guarantor has caused this Guaranty to be
duly executed and delivered by its officer thereunto duly authorized as of the
date first above written.

                                  BACKWIRE.COM, INC.
                                  TELEPHONE ENTERTAINMENT NETWORK, INC.
                                  CHASETEL LICENSEE CORP.
                                  CRICKET LICENSEE (ALBANY), INC.
                                  CRICKET LICENSEE (COLUMBUS), INC.
                                  CRICKET LICENSEE (DENVER) INC.
                                  CRICKET LICENSEE (LAKELAND) INC.
                                  CRICKET LICENSEE (MACON), INC.
                                  CRICKET LICENSEE (NORTH CAROLINA) INC.
                                  CRICKET LICENSEE (PITTSBURGH) INC.
                                  CRICKET LICENSEE (REAUCTION), INC.
                                  CRICKET LICENSEE I, INC.
                                  CRICKET LICENSEE II, INC.
                                  CRICKET LICENSEE III, INC.
                                  CRICKET LICENSEE IV, INC.
                                  CRICKET LICENSEE V, INC.
                                  CRICKET LICENSEE VI, INC.
                                  CRICKET LICENSEE VII, INC.
                                  CRICKET LICENSEE VIII, INC.
                                  CRICKET LICENSEE IX, INC.
                                  CRICKET LICENSEE X, INC.
                                  CRICKET LICENSEE XII, INC.
                                  CRICKET LICENSEE XIII, INC.
                                  CRICKET LICENSEE XIV, INC.
                                  CRICKET LICENSEE XV, INC.
                                  CRICKET LICENSEE XVI, INC.
                                  CRICKET LICENSEE XVII, INC.
                                  CRICKET LICENSEE XVIII, INC.
                                  CRICKET LICENSEE XIX, INC.
                                  CRICKET LICENSEE XX, INC.
                                  CRICKET HOLDINGS DAYTON, INC.
                                  MCG PCS LICENSEE CORPORATION, INC.
                                  CHASETEL REAL ESTATE HOLDING COMPANY,
                                  INC.
                                  CRICKET ALABAMA PROPERTY COMPANY
                                  CRICKET ARIZONA PROPERTY COMPANY
                                  CRICKET ARKANSAS PROPERTY COMPANY
                                  CRICKET CALIFORNIA PROPERTY COMPANY
                                  CRICKET COLORADO PROPERTY COMPANY
                                  CRICKET FLORIDA PROPERTY COMPANY
                                  CRICKET GEORGIA PROPERTY COMPANY, INC.
                                  CRICKET IDAHO PROPERTY COMPANY
                                  CRICKET ILLINOIS PROPERTY COMPANY
                                  CRICKET INDIANA PROPERTY COMPANY
                                  CRICKET KANSAS PROPERTY COMPANY
                                  CRICKET KENTUCKY PROPERTY COMPANY
                                  CRICKET MICHIGAN PROPERTY COMPANY
                                  CRICKET MINNESOTA PROPERTY COMPANY

<PAGE>

                                  CRICKET MISSISSIPPI PROPERTY COMPANY
                                  CRICKET NEBRASKA PROPERTY COMPANY
                                  CRICKET NEVADA PROPERTY COMPANY
                                  CRICKET NEW MEXICO PROPERTY COMPANY
                                  CRICKET NEW YORK PROPERTY COMPANY,
                                  INC.
                                  CRICKET NORTH CAROLINA PROPERTY
                                  COMPANY
                                  CRICKET OHIO PROPERTY COMPANY
                                  CRICKET OKLAHOMA PROPERTY COMPANY
                                  CRICKET OREGON PROPERTY COMPANY
                                  CRICKET PENNSYLVANIA PROPERTY COMPANY
                                  CRICKET TEXAS PROPERTY COMPANY
                                  CRICKET UTAH PROPERTY COMPANY
                                  CRICKET WASHINGTON PROPERTY COMPANY
                                  CRICKET WISCONSIN PROPERTY COMPANY
                                  LEAP PCS MEXICO, INC.

                                  By: /s/ S. Douglas Hutcheson
                                  Name: S. Douglas Hutcheson
                                  Title: Chief Financial Officer

                                       2
<PAGE>

                                                                       EXHIBIT A
                                                                          TO THE
                                                             SUBSIDIARY GUARANTY

                     FORM OF SUBSIDIARY GUARANTY SUPPLEMENT

                                                              _________ ___, ___

Bank of America, N.A., as Administrative Agent
[Address of Administrative Agent]

Attention:  _________

Credit Agreement dated as of January 10, 2005 among Leap Wireless International,
     Inc., a Delaware corporation, Cricket Communications, Inc., a Delaware
      corporation (the "BORROWER"), the Lender Parties party to the Credit
          Agreement and Bank of America, N.A., as Administrative Agent

Ladies and Gentlemen:

            Reference is made to the above-captioned Credit Agreement and to the
Subsidiary Guaranty referred to therein (such Subsidiary Guaranty, as in effect
on the date hereof and as it may hereafter be amended, supplemented or otherwise
modified from time to time, together with this Guaranty Supplement, being the
"SUBSIDIARY GUARANTY"). The capitalized terms defined in the Subsidiary Guaranty
or in the Credit Agreement and not otherwise defined herein are used herein as
therein defined.

            Section 1. Guaranty; Limitation of Liability. (a) The undersigned
hereby absolutely, unconditionally and irrevocably guarantees the punctual
payment when due, whether at scheduled maturity or on any date of a required
prepayment or by acceleration, demand or otherwise, of all Obligations of each
other Loan Party now or hereafter existing under or in respect of the Loan
Documents (including, without limitation, any extensions, modifications,
substitutions, amendments or renewals of any or all of the foregoing
Obligations), whether direct or indirect, absolute or contingent, and whether
for principal, interest, premium, fees, indemnities, contract causes of action,
costs, expenses or otherwise (such Obligations being the "GUARANTEED
OBLIGATIONS"), and agrees to pay any and all expenses (including, without
limitation, fees and expenses of counsel) incurred by the Administrative Agent
or any other Secured Party in enforcing any rights under this Guaranty
Supplement, the Subsidiary Guaranty or any other Loan Document. Without limiting
the generality of the foregoing, the undersigned's liability shall extend to all
amounts that constitute part of the Guaranteed Obligations and would be owed by
any other Loan Party to any Secured Party under or in respect of the Loan
Documents but for the fact that they are unenforceable or not allowable due to
the existence of a bankruptcy, reorganization or similar proceeding involving
such other Loan Party.

            (b) The undersigned, and by its acceptance of this Guaranty
Supplement, the Administrative Agent and each other Secured Party, hereby
confirms that it is the intention of all

<PAGE>

such Persons that this Guaranty Supplement, the Subsidiary Guaranty and the
Obligations of the undersigned hereunder and thereunder not constitute a
fraudulent transfer or conveyance for purposes of Bankruptcy Law, the Uniform
Fraudulent Conveyance Act, the Uniform Fraudulent Transfer Act or any similar
foreign, federal or state law to the extent applicable to this Guaranty
Supplement, the Subsidiary Guaranty and the Obligations of the undersigned
hereunder and thereunder. To effectuate the foregoing intention, the
Administrative Agent, the other Secured Parties and the undersigned hereby
irrevocably agree that the Obligations of the undersigned under this Guaranty
Supplement and the Subsidiary Guaranty at any time shall be limited to the
maximum amount as will result in the Obligations of the undersigned under this
Guaranty Supplement and the Subsidiary Guaranty not constituting a fraudulent
transfer or conveyance.

            (c) The undersigned hereby unconditionally and irrevocably agrees
that in the event any payment shall be required to be made to any Secured Party
under this Guaranty Supplement, the Subsidiary Guaranty, the Parent Guaranty or
any other guaranty, the undersigned will contribute, to the maximum extent
permitted by applicable law, such amounts to each other Guarantor and each other
guarantor so as to maximize the aggregate amount paid to the Secured Parties
under or in respect of the Loan Documents.

            Section 2. Obligations Under the Guaranty. The undersigned hereby
agrees, as of the date first above written, to be bound as a Guarantor by all of
the terms and conditions of the Subsidiary Guaranty to the same extent as each
of the other Guarantors thereunder. The undersigned further agrees, as of the
date first above written, that each reference in the Subsidiary Guaranty to an
"ADDITIONAL GUARANTOR" or a "GUARANTOR" shall also mean and be a reference to
the undersigned, and each reference in any other Loan Document to a "SUBSIDIARY
GUARANTOR" or a "LOAN PARTY" shall also mean and be a reference to the
undersigned.

            Section 3. Representations and Warranties. The undersigned hereby
makes each representation and warranty set forth in Section 6 of the Subsidiary
Guaranty to the same extent as each other Guarantor.

            Section 4. Delivery by Telecopier. Delivery of an executed
counterpart of a signature page to this Guaranty Supplement by telecopier shall
be effective as delivery of an original executed counterpart of this Guaranty
Supplement.

            Section 5. Governing Law; Jurisdiction; Waiver of Jury Trial, Etc.
(a) This Guaranty Supplement shall be governed by, and construed in accordance
with, the laws of the State of New York.

            (b) The undersigned hereby irrevocably and unconditionally submits,
for itself and its property, to the nonexclusive jurisdiction of any New York
State court or any federal court of the United States of America sitting in New
York City, and any appellate court from any thereof, in any action or proceeding
arising out of or relating to this Guaranty Supplement, the Subsidiary Guaranty
or any of the other Loan Documents to which it is or is to be a party, or for
recognition or enforcement of any judgment, and the undersigned hereby
irrevocably and unconditionally agrees that all claims in respect of any such
action or proceeding may be heard and determined in any such New York State
court or, to the extent permitted by law, in such federal court. The undersigned
agrees that a final judgment in any such action or proceeding

                                       2
<PAGE>

shall be conclusive and may be enforced in other jurisdictions by suit on the
judgment or in any other manner provided by law. Nothing in this Guaranty
Supplement or the Subsidiary Guaranty or any other Loan Document shall affect
any right that any party may otherwise have to bring any action or proceeding
relating to this Guaranty Supplement, the Subsidiary Guaranty or any of the
other Loan Documents to which it is or is to be a party in the courts of any
other jurisdiction.

            (c) The undersigned irrevocably and unconditionally waives, to the
fullest extent it may legally and effectively do so, any objection that it may
now or hereafter have to the laying of venue of any suit, action or proceeding
arising out of or relating to this Guaranty Supplement, the Subsidiary Guaranty
or any of the other Loan Documents to which it is or is to be a party in any New
York State or federal court. The undersigned hereby irrevocably waives, to the
fullest extent permitted by law, the defense of an inconvenient forum to the
maintenance of such suit, action or proceeding in any such court.

            (d) THE UNDERSIGNED HEREBY IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY
JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM (WHETHER BASED ON CONTRACT, TORT
OR OTHERWISE) ARISING OUT OF OR RELATING TO ANY OF THE LOAN DOCUMENTS, THE LOANS
OR THE ACTIONS OF ANY SECURED PARTY IN THE NEGOTIATION, ADMINISTRATION,
PERFORMANCE OR ENFORCEMENT THEREOF.

                                        Very truly yours,

                                        [NAME OF ADDITIONAL GUARANTOR]

                                        By ---------------------------
                                           Title:

                                      3

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