Document:

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                                                                     EXHIBIT 4.2

                                PLEDGE AGREEMENT

      This PLEDGE AGREEMENT (this "Pledge Agreement") is made and entered into
as of February 23, 2000 by LEAP WIRELESS INTERNATIONAL, INC., a Delaware
corporation (the "Company"), having its registered office at 10307 Pacific
Center Court, San Diego, California, in favor of State STREET BANK AND TRUST
Company ("State Street"), a state chartered trust company organized under the
laws of the Commonwealth of Massachusetts, having an office at 22 Asylum Street,
Hartford Connecticut 06103, as (i) trustee (the "Trustee") for the holders (the
"Holders") of the Notes (as defined herein) issued by the Company under the
Indenture referred to below and (ii) in its individual capacity, as securities
intermediary (in such capacity, the "Collateral Securities Intermediary").
Capitalized terms used herein and not otherwise defined herein shall have the
meanings given to such terms in the Indenture.

                               W I T N E S S E T H

      WHEREAS, the Company and the Trustee have entered into that certain
indenture dated as of the date hereof (as amended, restated, supplemented or
otherwise modified from time to time, the "Indenture"), pursuant to which the
Company is issuing on the date hereof (i) $225,000,000 in aggregate principal
amount of 12 1/2% Senior Notes due 2010 (the "Senior Notes") and (ii)
$668,000,000 in aggregate principal amount at maturity of 14 1/2% Senior
Discount Notes due 2010 (the "Senior Discount Notes" and together with the
Senior Notes, the "Notes"); and

      WHEREAS, the Trustee has opened a collateral account (the "Pledge
Account") with ___________, at its office at __________, Reference:
"____________," Account No. __________, in the name, and under the sole control
and dominion, of the Trustee and subject to the terms of this Pledge Agreement;

      WHEREAS, the Company has agreed pursuant to the Indenture to deposit in
the Pledge Account, for the benefit of the Holders of the Senior Notes, an
amount from the net proceeds of the offering of the Senior Notes sufficient to
acquire Pledged Securities (as defined herein) in an amount as will be
sufficient upon receipt of scheduled interest and principal payments on such
Pledged Securities to provide payment in full when due of the first seven
scheduled interest payments due on the Senior Notes; and

      WHEREAS, to secure the obligations of the Company under the Indenture and
the Senior Notes to pay in full each of the first seven scheduled interest
payments on the Senior Notes and to secure repayment of the principal, premium
(if any) and interest on the Senior Notes in the event that the Senior Notes
become due and payable prior to such time as the first seven scheduled interest
payments thereon shall have been paid in full (collectively, the "Obligations"),
the Company has agreed (i) to pledge to the Trustee for its benefit and the
ratable benefit of the Holders of the Senior Notes, a security interest in all
cash, if any, held in the Pledge Account, the Pledged Securities and related
collateral and (ii) to execute and deliver this Pledge Agreement in order to
secure the payment and performance by the Company of all the Obligations; and

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      WHEREAS, it is a condition precedent to the initial purchase of the Senior
Notes by the initial Holders thereof that the Company shall have granted the
assignment and security interest and made the pledge and assignment contemplated
by this Pledge Agreement; and

      WHEREAS, unless otherwise defined herein or in the Indenture, terms used
in Articles 8 or 9 of the Uniform Commercial Code ("UCC") as in effect in the
State of New York are used herein as therein defined.

      NOW, THEREFORE, in consideration of the mutual promises herein contained,
and in order to induce the Holders of the Senior Notes to purchase the Senior
Notes, the Company hereby agrees with the Trustee, for the benefit of the
Trustee and for the ratable benefit of the Holders of the Senior Notes, as
follows:

      Section 1. PLEDGE AND GRANT OF SECURITY INTEREST. The Company hereby
assigns and pledges to the Trustee for its benefit and for the ratable benefit
of the Holders of the Senior Notes, and hereby grants to the Trustee for its
benefit and for the ratable benefit of the Holders of the Senior Notes, a
continuing first priority security interest in and to all of the Company's
right, title and interest in, to and under the following (whether consisting of
investment securities, book-entry securities or other securities, security
entitlements, financial assets or other investment property, accounts, general
intangibles, instruments or documents, securities accounts, deposit accounts or
other bank, trust or cash collateral accounts, or other property, assets or
rights), whether now owned or hereafter acquired, wherever located and whether
now or hereafter existing (hereinafter collectively referred to as the
"Collateral"):

                  (a) the Pledge Account, all financial assets from time to time
credited to the Pledge Account (including, without limitation, any Pledged
Securities from time to time credited to the Pledge Account), and all dividends,
interest, cash, instruments and other property from time to time received,
receivable or otherwise distributed in respect of or in exchange for any or all
of such financial assets;

                  (b) any and all applicable security entitlements to any of the
financial assets credited from time to time to the Pledge Account (including,
without limitation, to any Pledged Securities from time to time credited to the
Pledge Account);

                  (c) any and all related securities accounts in which security
entitlements to any of the financial assets credited from time to time to the
Pledge Account (including, without limitation, to any Pledged Securities from
time to time credited to the Pledge Account);

                  (d) all notes, certificates of deposit, deposit accounts,
checks and other instruments from time to time hereafter delivered to or
otherwise possessed by the Trustee for or on behalf of the Company in
substitution for or in addition to any or all of the then existing Collateral;

                  (e) all interest, dividends, cash, instruments and other
property from time to time received, receivable or otherwise distributed in
respect of or in exchange for any or all of the then existing Collateral; and

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                  (f) all proceeds (including, without limitation, cash
proceeds) of any and all of the foregoing Collateral (including, without
limitation, proceeds that constitute property of types described in clauses (a)
through (e) of this Section 1).

      Section 2. SECURITY FOR OBLIGATION. This Pledge Agreement and the grant of
a security interest in the Collateral secure the prompt and complete payment and
performance when due (whether at stated maturity, by acceleration or otherwise)
of all the Obligations, whether for principal, interest, fees or otherwise, now
or hereafter existing, under this Pledge Agreement, the Senior Notes or the
Indenture (all such Obligations being the "Secured Obligations"). Without
limiting the generality of the foregoing, this Pledge Agreement and the grant of
a security interest in the Collateral hereunder secure the payment of all
amounts that constitute part of the Secured Obligations and would be owed by the
Company to the Trustee or the Holders under the Senior Notes or the Indenture
but for the fact that they are unenforceable or not allowable due to the
existence of a bankruptcy, reorganization or similar proceeding involving the
Company.

      Section 3. MAINTAINING THE COLLATERAL ACCOUNT. Prior to or concurrently
with the execution and delivery hereof and for so long as any Secured Obligation
shall remain outstanding,

                  (a) the Trustee shall establish and maintain (and the
Collateral Securities Intermediary shall maintain and administer in accordance
with this Pledge Agreement) the Pledge Account with the Collateral Securities
Intermediary at its office at 225 Asylum Street, Hartford, Connecticut, 06103 in
accordance with the terms of this Pledge Agreement. The Pledge Account shall at
all times be segregated from any other custodial or collateral account
maintained by the Trustee.

                  (b) the Collateral Securities Intermediary and the Trustee
shall cause the Pledge Account to be, and the Pledge Account shall be, separate
from all other accounts held by or under the control and dominion of the
Trustee, the Collateral Securities Intermediary or State Street. It shall be a
term and condition of the Pledge Account, notwithstanding any term or condition
to the contrary in any other agreement relating to the Pledge Account, and
except as otherwise provided by the provisions of Section 5 and Section 17.9 of
this Pledge Agreement, that no amount shall be paid or released to or for the
account of, or withdrawn by or for the account of, the Company or any other
Person from the Pledge Account.

                  (c) the Pledge Account shall be subject to such applicable
laws, and such applicable regulations of any appropriate banking or governmental
authority, as may now or hereafter be in effect, including, without limitation,
any applicable regulations of the Board of Governors of the Federal Reserve
System.

                  (d) subject to the provisions of this Pledge Agreement, the
Pledge Account shall be under the sole dominion and control of the Trustee. The
Trustee shall have the sole right to make withdrawals from the Pledge Account
and to exercise all rights (including the delivery of entitlement orders) with
respect to the Collateral from time to time therein. All Collateral delivered to
or held by or on behalf of, and not released by, the Trustee pursuant hereto
shall be held in the Pledge Account in accordance with the provisions hereof.

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                  (e) if any earnings of the Collateral held in the Pledge
Account are subject to non-U.S. withholding taxes, the Trustee shall cooperate
in good faith with the Company to reduce or eliminate such withholding taxes,
including, without limitation, through changing the location of the Pledge
Account or through establishing an additional Pledge Account at a different
location to hold the affected Collateral, provided that after giving effect to
any such change of location or establishment of an additional Pledge Account,
the Trustee's security interest in the affected Collateral shall continue to
constitute a valid and perfected first priority security interest in such
Collateral.

                  (f) all Collateral shall be retained in the Pledge Account
pending disbursement pursuant to the terms of this Pledge Agreement.

                  (g)

      Section 4. INTENTIONALLY OMITTED

      Section 5. DISBURSEMENTS.

                  (a) Immediately prior to the due date of any of the first
seven scheduled interest payments on the Senior Notes, the Company may (i)
pursuant to written instructions given by the Company to the Trustee (an "Issuer
Order"), direct the Trustee to release from the Pledge Account and pay to the
Holders of the Senior Notes proceeds sufficient to provide for payment in full
of such interest then due on the Senior Notes or (ii) deposit with the Trustee
from funds otherwise available to the company cash sufficient to pay the
interest scheduled to be paid on such date. Upon receipt of an Issuer Order, the
Trustee will release funds in an amount sufficient to provide for the payment in
full of such interest then due on the Senior Notes in accordance with such
Issuer Order and the payment provisions of the Indenture to the Holders of the
Senior Notes from (and to the extent of) proceeds of the Pledged Securities in
the Pledge Account. Nothing in this Section 5 shall affect the Trustee's rights
to apply the Collateral to the payments of amounts due on the Senior Notes upon
acceleration thereof.

                  (b) If the Company makes any interest payment or portion of an
interest payment pursuant to Section 5(a)(ii) from a source of funds other than
the Pledge Account ("Pledgor Funds"), the Company may, after payment in full of
such interest payment, direct the Trustee pursuant to an Issuer Order to release
to the Company or to another party at the direction of the Company (the
"Pledgor's Designee") proceeds from the Pledge Account in an amount less than or
equal to the amount of Company Funds applied to such interest payment. Upon
receipt by the Trustee of (i) such Issuer Order and (ii) payment in full of such
interest payment, the Trustee shall pay over to the Company or the Company's
Designee, as the case may be, proceeds from the Pledge Account in accordance
with such Issuer Order as soon as practicable.

                  (c) If at any time the principal of and interest on the
Pledged Securities exceeds 100% of the amount sufficient, in the written opinion
of an internationally recognized firm of independent accountants selected by the
Company and delivered to the Trustee, to provide for payment in full of the
remaining first seven scheduled interest payments due on the Senior Notes, the
Company may direct the Trustee to release any such excess amount to the

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Company or to the Company's Designee. Upon receipt of an Issuer Order (which
shall include a certificate from such internationally recognized firm of
independent accountants stating the amount by which the Pledged Securities
exceeds the amount required to be held in the Pledge Account) the Trustee shall
pay over to the Company or the Company's Designee, as the case may be, any such
excess amount.

                  (d) Upon payment in full of the first seven scheduled interest
payments on the Senior Notes, the security interest in the Collateral evidenced
by this Pledge Agreement will automatically terminate and be of no further force
and effect and the Collateral shall promptly be paid over and transferred to the
Company or the Company's Designee, as the case may be. Furthermore, upon the
release of any Collateral from the Pledge Account in accordance with the terms
of this Pledge Agreement, whether upon release of Collateral to Holders as
payment of interest or otherwise, the security interest evidenced by this Pledge
Agreement in such released Collateral will automatically terminate and be of no
further force and effect.

                  (e) At least three Business Days prior to the due date of each
of the first seven scheduled interest payments on the Senior Notes, the Company
shall give the Trustee notice (by Issuer Order) as to whether such interest
payment will be made pursuant to Section 5(a)(i) or 5(a)(ii) above and the
respective amounts of interest that will be paid from the Pledge Account and
from Company Funds. Any Company Funds to be used to make any interest payment
shall be delivered to the Trustee, in immediately available funds, prior to
10:00 A.M. (New York City time) on such interest payment date. If no such notice
is given or such Company Funds have not been so delivered, the Trustee will act
pursuant to Section 5(a) above as if it had received an Issuer Order pursuant
thereto for the payment in full of the interest then due from the Pledge
Account.

                  (f) If on any interest payment date there are insufficient
funds in the Pledge Account to make any scheduled payment of interest (after
taking into account any Company Funds delivered to the Trustee as provided in
Section 5(a)(ii) above), the Trustee shall liquidate Collateral in the Pledge
Account to the extent necessary to pay, in full, such scheduled payment of
interest.

                  (g) Nothing contained in this Pledge Agreement shall (i)
afford the Company any right to issue entitlement orders with respect to any
security entitlement to the Pledged Securities or any securities account in
which any such security entitlement may be carried, or otherwise afford the
Company control of any such security entitlement or (ii) otherwise give rise to
any rights of the Company with respect to the Pledged Securities, any security
entitlement thereto or any securities account in which any such security
entitlement may be carried, other than the Company's rights under this Pledge
Agreement as the beneficial owner of collateral pledged to and subject to the
exclusive dominion and control (except as expressly provided in Sections 5(a),
(b), (c), (d), (e) and (f) hereof) of the Trustee in its capacity as such (and
not as a securities intermediary). The Company acknowledges, confirms and agrees
that the Trustee holds a security interest to the Pledged Securities solely as
Trustee for the Holders of the Senior Notes and not as a securities
intermediary.

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      Section 6. CASH DEPOSIT; INVESTMENTS.

                  (a) On the date hereof, the Company shall deposit (or cause to
be deposited) cash proceeds sufficient to purchase direct obligations (or
certificates representing an ownership interest in such obligations) of the
United States of America (including any agency or instrumentality thereof) for
the payment of which full faith and credit of the United States of America is
pledged and which are not callable at the Company's option (the "Pledged
Securities") on the date hereof.

                  (b) In the event that the Company shall have deposited (or
cause to be deposited) cash proceeds pursuant to clause (a) above, the Trustee
shall, on the date hereof, use such cash proceeds to invest in the Pledged
Securities, at which time such Pledged Securities shall be promptly credited to
the Pledge Account. Until such time as any cash proceeds are invested in the
Pledged Securities as provided above, such cash proceeds shall be deposited and
held in a deposit account with __________ in the name of the Trustee and under
the sole control and dominion of the Trustee, such deposit account to be deemed
to constitute part of the Pledge Account.

      Section 7. DELIVERY AND CONTROL OF COLLATERAL; COLLATERAL ACCOUNTS;
INTEREST; SECURITIES INTERMEDIARY.

            Notwithstanding anything to the contrary contained in this Pledge
Agreement (it being understood that in the event of any conflict between the
provisions of this Section 7 and any other provisions of this Pledge Agreement,
the provisions of this Section 7 shall control) State Street, as Collateral
Securities Intermediary, hereby represents and warrants to, and agrees with the
Company and the Trustee as follows:

                  (a) It is a securities intermediary as of the date hereof and
for so long as this Pledge Agreement remains in effect shall remain in effect
and State Street is acting as the Collateral Securities Intermediary hereunder,
it shall remain a securities intermediary and shall act as such with respect to
the Company, the Trustee, the Pledge Account, all financial assets credited
thereto (including without limitation the Pledged Securities), all related
securities entitlements and all other Collateral.

                  (b) The Pledge Account is and will be maintained as a
securities account and Trustee is the entitlement holder in respect of the
Pledge Account, all financial assets credited thereto (including without
limitation the Pledged Securities) and all related securities entitlements and
the Collateral Securities Intermediary shall so note the same in its records
with respect to the Pledge Account, all financial assets credited thereto
(including without limitation the Pledged Securities) and all related securities
entitlements.

                  (c) It is the securities intermediary with respect to any
assets, property or other items credited to the Pledge Account from time to time
(including without limitation the Pledged Securities).

                  (d) All financial assets in registered form or payable to or
to the order of and credited to the Pledge Account shall be registered in the
name of, payable to or to the order of, or endorsed to, the Collateral
Securities Intermediary or in blank and in no case during

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the term of this Pledge Agreement will any financial asset credited to the
Pledge Account be registered in the name of, payable to or to the order of, or
endorsed to, the Company, except to the extent the foregoing have been
subsequently endorsed by the Company to the Collateral Securities Intermediary
or in blank.

                  (e) It shall, upon written direction from the Trustee and
without further consent from the Company, (i) comply with all instructions,
entitlement orders and directions of any kind originated by the Trustee
concerning the Collateral, including entitlement orders to liquidate or
otherwise dispose of the Collateral as and to the extent directed by the Trustee
and pay over to the Trustee all proceeds and other value therefrom or otherwise
distributed with respect thereto without any set-off or deduction, and (ii)
except as otherwise directed by the Trustee, not to comply with the
instructions, entitlement orders or directions of the Company or any other
person, in each case it being the intention that Trustee shall have control of
the Pledge Account, all financial assets credited thereto (including without
limitation the Pledged Securities) and all related securities entitlements.

                  (f) Each item of property (whether cash, a security,
investment property, instrument or obligation, share, participation, interest or
other property whatsoever, including without limitation the Pledged Securities)
credited to the Pledge Account shall be treated as a financial asset.

                  (g) Except for the claims and interests of the Trustee and the
Company in the Pledge Account, all financial assets credited thereto (including
without limitation the Pledged Securities) and all related securities
entitlements, it does not know of any claim to or security interest or other
interest in the Pledged Account, any financial assets credited thereto
(including without limitation the Pledged Securities) or any related securities
entitlements and, except for such claims and interests of the Trustee and the
Company, the Trustee also does not know of any such claims or interests.

                  (h) It hereby waives its rights to set off any obligations of
the Company to it against the Pledged Account, any financial assets credited
thereto (including without limitation the Pledged Securities) or any related
securities entitlements, and hereby agrees that any and all liens, encumbrances,
claims or security interests which it may have against the Pledged Account, any
financial assets credited thereto (including without limitation the Pledged
Securities) or any related securities entitlements, either now or in the future
are and shall be subordinate and junior to the prior payment in full of all
obligations of the Company now or hereafter existing under the Indenture, Senior
Notes and all other documents related thereto whether for principal, interest
(including, without limitation, interest as provided in the Senior Notes,
whether or not such interest accrues after the filing of such petition for
purposes of the Bankruptcy Code or is an allowed claim in such proceeding),
indemnities, fees, premiums, expenses or otherwise.

                  (i) It shall not agree with any third party to comply with any
instructions, entitlement orders or directions of any kind concerning the
Pledged Account, any financial assets credited thereto (including without
limitation the Pledged Securities) or any related securities entitlements
originated by such third party without the prior written consent of the Trustee.

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                  (j) It shall maintain the Pledged Account so that all items of
income, gain, expense and loss recognized in the Pledged Account shall be
reported to the Internal Revenue Service and all state and local taxing
authorities under the name and taxpayer identification number of the Company and
the Company shall execute a Substitute Form W-9 or such other documents as may
be requested by the Trustee to provide that the Company shall not be subject to
the backup withholding requirements of the Internal Revenue Code of 1986, as
amended.

                  (k) Its jurisdiction for purposes of the UCC with respect to
the Pledged Account, all financial assets credited thereto (including without
limitation the Pledged Securities) and all related securities entitlements is
and shall always be the State of New York.

      Section 8. REPRESENTATIONS AND WARRANTIES.

            The Company hereby represents and warrants that:

                  (a) The execution and delivery by the Company of, and the
performance by the Company of its obligations under, this Pledge Agreement will
not contravene any provision of applicable law or the Articles of Incorporation
of the Company or any material agreement or other material instrument binding
upon the Company or any of its subsidiaries or any judgment, order or decree of
any governmental body, agency or court having jurisdiction over the Company or
any of its subsidiaries, or result in the creation or imposition of any Lien on
any assets of the Company, except for the security interests granted under this
Pledge Agreement.

                  (b) No consent of any other person and no approval,
authorization, order of, action by or qualification with, any governmental
authority, regulatory body, agency or other third party is required (i) for the
execution, delivery or performance by the Company of its obligations under this
Pledge Agreement or (ii) for the grant by the Company of the security interests
created by this Pledge Agreement or for the pledge by the Company of the
Collateral pursuant to this Pledge Agreement, except, in each case, for such
consents, approvals, authorizations, orders, actions and qualifications which
the failure to obtain, individually or in the aggregate, could not reasonably be
expected to have a material adverse effect on the properties, assets, financial
condition or results of operations of the Company. No consent of any other
person and no approval, authorization, order of, action by or qualification
with, any governmental authority, regulatory body, agency or other third party
is required for the exercise by the Trustee of the rights provided for in this
Pledge Agreement or the remedies in respect of the Collateral pursuant to this
Pledge Agreement, except for any such consents, approvals, authorizations or
orders required to be obtained by the Trustee (or the Holders) for reasons other
than the consummation of this transaction.

                  (c) The Company is the beneficial owner of the Collateral,
free and clear of any Lien or claims of any person or entity (except for the
security interests created by this Pledge Agreement). The Company has not at
time transferred any of the Collateral to third parties nor encumbered such
Collateral with any third party rights. No financing statement or instrument
similar in effect covering all or any part of the Company's interest in the
Pledged

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Securities is on file in any public or recording office, other than the
financing statements filed pursuant to this Pledge Agreement. The Company has no
trade names.

                  (d) This Pledge Agreement has been duly authorized, validly
executed and delivered by the Company and constitutes a valid and binding
agreement of the Company, enforceable against the Company in accordance with its
terms, except as (i) the enforceability hereof may be limited by bankruptcy,
insolvency, fraudulent conveyance, preference, reorganization, moratorium or
similar laws now or hereafter in effect relating to or affecting creditors'
rights or remedies generally, (ii) the availability of equitable remedies may be
limited by equitable principles of general applicability, (iii) the exculpation
provisions and rights to indemnification hereunder may be limited by U.S.
federal and state securities laws and public policy considerations and (iv) the
waiver of rights and defenses contained in Section 14(a) and (b), Section 17.11
and Section 17.15 of this Pledge Agreement may be limited by applicable law.

                  (e) Upon the crediting of any Collateral to the Pledged
Account in accordance with Sections 3 and 6 above, the pledge and grant of a
security interest in the Collateral pursuant to this Pledge Agreement for the
benefit of the Trustee and the Holders of the Senior Notes will constitute a
valid and perfected first priority security interest in such Collateral,
securing the payment of the Secured Obligations enforceable as such against all
creditors of the Company (and any persons purporting to purchase any of the
Collateral from the Company).

                  (f) There are no legal or governmental proceedings pending or,
to the best of the Company's knowledge, threatened to which the Company or any
of its subsidiaries is a party or to which any of the properties of the Company
or any such subsidiary is subject that would materially adversely affect the
power or ability of the Company to perform its obligations under this Pledge
Agreement or to consummate the transactions contemplated hereby.

                  (g) The pledge of the Collateral pursuant to this Pledge
Agreement is not prohibited by law or governmental regulation (including,
without limitation, Regulations G, T, U and X of the Board of Governors of the
Federal Reserve System) applicable to the Company.

                  (h) No Event of Default exists.

      Section 9. FURTHER ASSURANCES.

                  (a) The Company agrees that from time to time, at the expense
of the Company, the Company will, promptly including upon reasonable request by
the Trustee, execute and deliver or cause to be executed and delivered, or use
its reasonable commercial efforts to procure, all assignments, instruments and
other documents, all in form and substance reasonably satisfactory to the
Trustee, deliver any instruments to the Trustee and take any other actions that
may be necessary or, in the reasonable opinion of the Trustee, desirable to
perfect, continue the perfection of, or protect the first priority of the
Trustee's security interest in and to the Collateral, to protect the Collateral
against the rights, claims, or interests of third persons (other than any such
rights, claims or interests created by or arising through the Trustee) or to
effect the purposes of this Pledge Agreement.

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                  (b) The Company hereby authorizes the Trustee to file any
financing or continuation statements in the United States with respect to the
Collateral without the signature of the Company (to the extent permitted by
applicable law); provided, however, that the Company shall not be relieved of
any of its obligations under Section 9(a) hereof. A photocopy or other
reproduction of this Pledge Agreement or any financing statement covering the
Collateral or any part thereof shall be sufficient as a financing statement
where permitted by law.

                  (c) The Company will furnish to the Trustee from time to time
statements and schedules further identifying and describing the Collateral and
such other reports in connection with the Collateral as the Trustee may
reasonably request, all in reasonable detail.

                  (d) The Company will promptly pay all costs reasonably
incurred in connection with any of the foregoing within 30 days of receipt of an
invoice therefor. The Company also agrees, whether or not requested by the
Trustee, to take all actions that are necessary to perfect or continue the
perfection of, or to protect the first priority of, the Trustee's security
interest in and to the Collateral, including the filing of all necessary
financing and continuation statements, and to protect the Collateral against the
rights, claims or interests of third persons (other than any such rights, claims
or interests created by or arising through the Trustee).

      Section 10. COVENANTS.

            The Company covenants and agrees with the Trustee and the Holders of
the Senior Notes that from and after the date of this Pledge Agreement until the
earlier of payment in full in cash of (x) each of the first seven scheduled
interest payments due on the Senior Notes under the terms of the Indenture and
(y) all obligations due and owing under the Indenture and the Senior Notes in
the event such obligations become due and payable prior to the payment in full
of the first seven scheduled interest payments on the Senior Notes:

                  (a) that (i) it will not (and will not purport to) sell or
otherwise dispose of, or grant any option or warrant with respect to, any of the
Collateral or its beneficial interest therein, and (ii) it will not create or
permit to exist any Lien or other adverse interest in or with respect to its
beneficial interest in any of the Collateral (except for the security interests
granted under this Pledge Agreement); and

                  (b) that it will not (i) enter into any agreement or
understanding that restricts or inhibits or purports to restrict or inhibit the
Trustee's rights or remedies hereunder, including, without limitation, the
Trustee's right to sell or otherwise dispose of the Collateral or (ii) fail to
pay or discharge any tax, assessment or levy of any nature with respect to its
beneficial interest in the Collateral not later than five days prior to the date
of any proposed sale under any judgment, writ or warrant of attachment with
respect to such beneficial interest.

      Section 11. POWER OF ATTORNEY.

            In addition to all of the powers granted to the Trustee pursuant to
the Indenture, the Company hereby appoints and constitutes the Trustee as the
Company's attorney-in-fact (with full power of substitution), with full
authority in the place and stead of the Company and in

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the name of the Company or otherwise, from time to time in the Trustee's
reasonable discretion to take any action and to execute any instrument that the
Trustee may deem necessary or advisable to accomplish the purposes of this
Pledge Agreement, including, without limitation:

                  (a) to ask for, demand, collect, sue for, recover, compromise,
receive and give acquittance and receipts for moneys due and to become due under
or in respect of any of the Collateral,

                  (b) to receive, indorse and collect any drafts or other
instruments, documents and chattel paper, in connection with clause (a)
above,

                  (c) to file any claims or take any action or institute any
proceedings that the Trustee may reasonably deem necessary or desirable for the
collection of any of the Collateral or otherwise to enforce the rights of the
Trustee with respect to any of the Collateral, and

                  (d) to pay or discharge taxes or Liens levied or placed upon
the Collateral, the legality or validity thereof and the amounts necessary to
discharge the same to be determined by the Trustee in its sole reasonable
discretion, and such payments made by the Trustee to become part of the
Obligations of the Company to the Trustee, due and payable immediately upon
demand; provided, however, that the Trustee shall have no obligation to perform
any of the foregoing actions. The Trustee's authority under this Section 11
shall include, without limitation, the authority to endorse and negotiate any
checks or instruments representing proceeds of Collateral in the name of the
Company, execute and give receipt for any certificate of ownership or any
document constituting Collateral, transfer title to any item of Collateral, sign
the Company's name on all financing statements (to the extent permitted by
applicable law) or any other documents reasonably deemed necessary or
appropriate by the Trustee to preserve, protect or perfect the security interest
in the Collateral and to file the same, prepare, file and sign the Company's
name on any notice of Lien, and to take any other actions arising from or
incident to the powers granted to the Trustee in this Pledge Agreement. This
power of attorney is coupled with an interest and is irrevocable by the Company.

      Section 12. NO ASSUMPTION OF DUTIES; REASONABLE CARE.

            The rights and powers conferred on the Trustee hereunder are solely
to preserve and protect the security interest of the Trustee and the Holders of
the Senior Notes in and to the Collateral granted hereby and shall not be
interpreted to, and shall not impose any duties on the Trustee in connection
therewith other than those expressly provided herein or imposed under applicable
law. Except as provided by applicable law or by the Indenture, the Trustee shall
be deemed to have exercised reasonable care in the custody and preservation of
the Collateral in its possession if the Collateral is accorded treatment
substantially equal to that which the Trustee accords similar property held by
the Trustee for its own account, it being understood that the Trustee in its
capacity as such shall not have any responsibility for (a) ascertaining or
taking action with respect to calls, conversions, exchanges, maturities or other
matters relative to any Collateral, whether or not the Trustee has or is deemed
to have knowledge of such matters, (b) taking any necessary steps to preserve
rights against any parties with respect to any Collateral or (c) investing or
reinvesting any of the Collateral or any loss on any investment.

                                       11
<PAGE>   12
      Section 13. INDEMNITY.

            The Company shall indemnify, hold harmless and defend the Trustee,
the Collateral Securities Intermediary and each of their respective directors,
officers, agents and employees, from and against any and all claims, actions,
obligations, liabilities and expenses, including reasonable defense costs,
reasonable investigative fees and costs, and reasonable legal fees and damages
arising from their execution of or performance under this Pledge Agreement,
except to the extent that such claim, action, obligation, liability or expense
is directly attributable to the bad faith, gross negligence or willful
misconduct of such indemnified person. This indemnification shall survive the
termination of this Pledge Agreement.

      Section 14. REMEDIES UPON EVENT OF DEFAULT.

            If any Event of Default shall have occurred and be continuing:

                  (a) The Trustee and the Holders of the Senior Notes may
exercise, in addition to all other rights given by law or by this Pledge
Agreement or the Indenture, all of the rights and remedies with respect to the
Collateral of a secured party under the UCC in effect in the State of New York
at that time and also may (i) require the Company to, and the Company hereby
agrees that it will at its expense and upon request of the Trustee forthwith,
assemble all or part of the Collateral as directed by the Trustee and make it
available to the Trustee at a place to be designated by the Trustee that is
reasonably convenient to both parties and (ii) without notice except as
specified below, sell the Collateral or any part thereof in one or more parcels
at any broker's board or at public or private sale, in one or more sales or
lots, at any of the Trustee's offices or elsewhere, for cash, on credit or for
future delivery, and upon such other terms as the Trustee may deem commercially
reasonable. The Company agrees that, to the extent notice of sale shall be
required by law, at least ten days' notice to the Company of the time and place
of any public sale or the time after which any private sale is to be made shall
constitute reasonable notification. The Trustee shall not be obligated to make
any sale of Collateral regardless of notice of sale having been given. The
Trustee may adjourn any public or private sale from time to time by announcement
at the time and place fixed therefor, and such sale may, without further notice,
be made at the time and place to which it was so adjourned. The purchaser of any
or all Collateral so sold shall thereafter hold the same absolutely, free from
any claim, encumbrance or right of any kind whatsoever created by or through the
Company. Any sale of the Collateral conducted in conformity with reasonable
commercial practices of banks, insurance companies, commercial finance
companies, or other financial institutions disposing of property similar to the
Collateral shall be deemed to be commercially reasonable. The Trustee or any
Holder of Senior Notes may, in its own name or in the name of a designee or
nominee, buy any of the Collateral at any public sale and, if permitted by
applicable law, at any private sale. All expenses (including court costs and
reasonable attorneys' fees, expenses and disbursements) of, or incident to, the
enforcement of any of the provisions hereof shall be recoverable from the
proceeds of the sale or other disposition of the Collateral.

                  (b) All cash proceeds received by the Trustee in respect of
any sale of, collection from, or other realization upon all or any part of the
Collateral may, following the payment of the fees and expenses of the Trustee,
be held by the Trustee as collateral for, and/or then or at any time thereafter
applied (after payment of any amounts payable to the Trustee

                                       12
<PAGE>   13
pursuant to Section 15): first, to the Holders for amounts due and unpaid on the
Senior Notes for interest, ratably, without preference or priority of any kind;
and second, to the Holders for amounts due and unpaid on the Senior Notes for
principal, ratably, without preference or priority of any kind. Any surplus of
such cash or cash proceeds held by the Trustee and remaining after payment in
full of all the Secured Obligations shall be paid over to the Company or to
whomsoever may be lawfully entitled to receive such surplus.

                  (c) The Trustee may, without notice to the Company except as
required by law and at any time or from time to time, charge, set-off and
otherwise apply all or any part of the Secured Obligations against the Pledged
Account or any part thereof.

                  (d) The Company further agrees to use its best efforts to do
or cause to be done all such other acts as may be necessary to make such sale or
sales of all or any portion of the Collateral pursuant to this Section 14 valid
and binding and in compliance with any and all other applicable requirements of
law. The Company further agrees that a breach of any of the covenants contained
in this Section 14 will cause irreparable injury to the Trustee and the Holders
of the Senior Notes, that the Trustee and the Holders of the Senior Notes have
no adequate remedy at law in respect of such breach and, as a consequence, that
each and every covenant contained in this Section 14 shall be specifically
enforceable against the Company, and the Company hereby waives and agrees not to
assert any defenses against an action for specific performance of such covenants
except for a defense that no Event of Default has occurred and is continuing.

      Section 15. EXPENSES.

            The Company will upon demand pay to the Trustee and the Collateral
Securities Intermediary the amount of any and all reasonable expenses,
including, without limitation, the reasonable fees, expenses and disbursements
of its counsel, experts and agents retained by the Trustee or the Collateral
Securities Intermediary, as the case may be, that the Trustee or the Collateral
Securities Intermediary, as the case may be, may incur in connection with (a)
the review, negotiation and administration of this Pledge Agreement, (b) the
custody or preservation of, or the sale of, collection from, or other
realization upon, any of the Collateral, (c) the exercise or enforcement of any
of the rights of the Trustee and the Holders of the Senior Notes hereunder or
(d) the failure by the Company to perform or observe any of the provisions
hereof.

      Section 16. SECURITY INTEREST ABSOLUTE.

            All rights of the Trustee and the Holders of the Senior Notes and
security interests hereunder, and all obligations of the Company hereunder,
shall be absolute and unconditional irrespective of:

                  (a) any lack of validity or enforceability of the Indenture or
Senior Notes or any other 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 Secured Obligations, or any other
amendment or waiver of or any consent to any departure from the Indenture;

                                       13
<PAGE>   14
                  (c) any taking, exchange, surrender, release or non-perfection
of any Liens on any other collateral for all or any of the Secured Obligations;

                  (d) any manner of application of collateral, or proceeds
thereof, to all or any of the Secured Obligations, or any manner of sale or
other disposition of any collateral for all or any of the Secured Obligations or
any other assets of the Company;

                  (e) any change, restructuring or termination of the corporate
structure or existence of the Company; or

                  (f) to the extent permitted by applicable law, any other
circumstance which might otherwise constitute a defense available to, or a
discharge of, the Company in respect of the Secured Obligations or of this
Pledge Agreement.

      Section 17. MISCELLANEOUS PROVISIONS.

            Section 17.1 NOTICES. Any notice or communication given hereunder
shall be sufficiently given if in writing and delivered in person or mailed by
first class mail, commercial courier service or telecopier communication,
addressed as follows:

            IF TO THE COMPANY:

            Leap Wireless International, Inc.
            10307 Pacific Center Court
            San Diego, California  92121
            Fax:  ___________

            IF TO THE TRUSTEE OR THE COLLATERAL SECURITIES INTERMEDIARY:

            [____________________________]
            ______________________________
            ______________________________
            Fax:  ________________________
            Attention:  __________________

All such notices and other communications shall, when mailed, delivered or
telecopied, respectively, be effective when deposited in the mails, delivered or
telecopied, respectively, addressed as aforesaid.

            Section 17.2 NO ADVERSE INTERPRETATION OF OTHER AGREEMENTS. This
Pledge Agreement may not be used to interpret another pledge, security or debt
agreement of the Company or any subsidiary thereof. No such pledge, security or
debt agreement (other than the Indenture) may be used to interpret this Pledge
Agreement.

            Section 17.3 SEVERABILITY. The provisions of this Pledge Agreement
are severable, and if any clause or provision shall be held invalid, illegal or
unenforceable in whole or in part in any jurisdiction, then such invalidity or
unenforceability shall affect in that

                                       14
<PAGE>   15
jurisdiction only such clause or provision, or part thereof, and shall not in
any manner affect such clause or provision in any other jurisdiction or any
other clause or provision of this Pledge Agreement in any jurisdiction.

            Section 17.4 HEADINGS. The headings in this Pledge Agreement have
been inserted for convenience of reference only, are not to be considered a part
hereof and shall in no way modify or restrict any of the terms or provisions
hereof.

            Section 17.5 COUNTERPART ORIGINALS. This Pledge Agreement may be
signed in two or more counterparts, each of which shall be deemed an original,
but all of which shall together constitute one and the same agreement.

            Section 17.6 BENEFITS OF PLEDGE AGREEMENT. Nothing in this Pledge
Agreement, express or implied, shall give to any person, other than the parties
hereto and their successors hereunder, and the Holders of the Senior Notes, any
benefit or any legal or equitable right, remedy or claim under this Pledge
Agreement. The rights of the Company in the Collateral and the rights and
obligations of the Company hereunder may be assigned (an "ASSIGNMENT") to any
direct or indirect Wholly Owned Subsidiary of the Company (an "ASSIGNEE");
provided that such Assignee furnishes the Trustee with an Opinion of Counsel to
the effect that such Assignment is valid, binding and enforceable against such
Assignee and that after such Assignment the Trustee shall have a perfected
security interest in the Collateral, securing the payment of the Secured
Obligations, and addressing such other related matters as the Trustee may
reasonably request. The Trustee shall cooperate in good faith with the Company
to effect any proposed Assignment. Upon the effectiveness of any such
Assignment, the Assignee shall become the Company hereunder for all purposes of
this Pledge Agreement, and the prior Company shall be released from its
obligations hereunder (other than its obligations under Sections 13 and 15).

            Section 17.7 AMENDMENTS, WAIVERS AND CONSENTS. Any amendment or
waiver of any provision of this Pledge Agreement and any consent to any
departure by the Company from any provision of this Pledge Agreement shall be
effective only if made or duly given in compliance with all of the terms and
provisions of the Indenture, and then such waiver or consent shall be effective
only in the specific instance and for the specific purpose for which given.
Neither the Trustee nor any Holder of Senior Notes shall be deemed, by any act,
delay, indulgence, omission or otherwise, to have waived any right or remedy
hereunder or to have acquiesced in any Event of Default or in any breach of any
of the terms and conditions hereof. Failure of the Trustee or any Holder of
Senior Notes to exercise, or delay in exercising, any right, power or privilege
hereunder shall not preclude any other or further exercise thereof or the
exercise of any other right, power or privilege. A waiver by the Trustee or any
Holder of Senior Notes of any right or remedy hereunder on any one occasion
shall not be construed as a bar to any right or remedy that the Trustee or such
Holder of Senior Notes would otherwise have on any future occasion. The rights
and remedies herein provided are cumulative, may be exercised singly or
concurrently and are not exclusive of any rights or remedies provided by law.

            Section 17.8 INTERPRETATION OF AGREEMENT. To the extent a term or
provision of this Pledge Agreement conflicts with the Indenture, the Indenture
shall control with

                                       15
<PAGE>   16
respect to the subject matter of such term or provision. Acceptance of or
acquiescence in a course of performance rendered under this Pledge Agreement
shall not be relevant to determine the meaning of this Pledge Agreement even
though the accepting or acquiescing party had knowledge of the nature of the
performance and opportunity for objection.

            Section 17.9 CONTINUING SECURITY INTEREST; TERMINATION.

                  (a) This Pledge Agreement shall create a continuing security
interest in and to the Collateral and shall, unless otherwise provided in this
Pledge Agreement, remain in full force and effect until the payment in full in
cash of the Secured Obligations. This Pledge Agreement shall be binding upon the
Company, its transferees, successors and assigns, and shall inure, together with
the rights and remedies of the Trustee hereunder, to the benefit of the Trustee,
the Holders of the Senior Notes, the Collateral Securities Intermediary and
their respective successors, transferees and assigns.

                  (b) This Pledge Agreement (other than Company's obligations
under Sections 13 and 15) shall terminate upon the earlier of (i) the payment in
full in cash of the Secured Obligations and (ii) the payment in full in cash of
the first seven scheduled interest payments on all of the Senior Notes. At such
time, the Trustee shall, pursuant to an Issuer Order, reassign and redeliver to
the Company all of the Collateral hereunder that has not been sold, disposed of,
retained or applied by the Trustee in accordance with the terms of this Pledge
Agreement and the Indenture and take all actions that are necessary to release
the security interest created by this Pledge Agreement in and to the Collateral,
including the execution and delivery of all termination statements necessary to
terminate any financing or continuation statements filed with respect to the
Collateral. Such reassignment and redelivery shall be without warranty by or
recourse to the Trustee in its capacity as such, except as to the absence of any
Liens on the Collateral created by or arising through the Trustee, and shall be
at the reasonable expense of the Company.

            Section 17.10 SURVIVAL OF REPRESENTATIONS AND COVENANTS. All
representations, warranties and covenants of the Company contained herein shall
survive the execution and delivery of this Pledge Agreement, and shall terminate
only upon the termination of this Pledge Agreement.

            Section 17.11 WAIVERS. The Company waives presentment and demand for
payment of any of the Obligations, protest and notice of dishonor or default
with respect to any of the Obligations, and all other notices to which the
Company might otherwise be entitled, except as otherwise expressly provided
herein or in the Indenture.

            Section 17.12 AUTHORITY OF THE TRUSTEE.

                  (a) The Trustee shall have and be entitled to exercise all
powers hereunder that are specifically granted to the Trustee by the terms
hereof, together with such powers as are reasonably incident thereto. The
Trustee may perform any of its duties hereunder or in connection with the
Collateral by or through agents or employees and shall be entitled to retain
counsel and to act in reliance upon the advice of counsel concerning all such
matters. Except as otherwise expressly provided in this Pledge Agreement or the
Indenture, neither the

                                       16
<PAGE>   17
Trustee nor any director, officer, employee, attorney or agent of the Trustee
shall be liable to the Company for any action taken or omitted to be taken by
the Trustee, in its capacity as Trustee, hereunder, except for its own bad
faith, gross negligence or willful misconduct, and the Trustee shall not be
responsible for the validity, effectiveness or sufficiency hereof or of any
document or security furnished pursuant hereto. The Trustee and its directors,
officers, employees, attorneys and agents shall be entitled to rely on any
communication, instrument or document reasonably believed by it or them to be
genuine and correct and to have been signed or sent by the proper person or
persons.

            Section 17.13 The Company acknowledges that the rights and
responsibilities of the Trustee under this Pledge Agreement with respect to any
action taken by the Trustee or the exercise or non-exercise by the Trustee of
any option, right, request, judgment or other right or remedy provided for
herein or resulting or arising out of this Pledge Agreement shall, as between
the Trustee and the Holders of the Senior Notes, be governed by the Indenture
and by such other agreements with respect thereto as may exist from time to time
among them, but, as between the Trustee and the Company, the Trustee shall be
conclusively presumed to be acting as agent for the Holders of the Senior Notes
with full and valid authority so to act or refrain from acting, and the Company
shall not be obligated or entitled to make any inquiry respecting such
authority. All rights of the Trustee under the Indenture, including its right to
reimbursement and indemnification are incorporated herein by reference in their
entirety.

            Section 17.14 FINAL EXPRESSION. This Pledge Agreement, together with
the Indenture and any other agreement executed in connection herewith, is
intended by the parties as a final expression of this Pledge Agreement and is
intended as a complete and exclusive statement of the terms and conditions
thereof.

            Section 17.15 RIGHTS OF HOLDERS OF THE NOTES. No Holder of Senior
Notes shall have any independent rights hereunder other than those rights
granted to individual Holders of the Senior Notes pursuant to Section 6.07 of
the Indenture; provided that nothing in this subsection shall limit any rights
granted to the Trustee under the Senior Notes or the Indenture.

            Section 17.16 GOVERNING LAW; SUBMISSION TO JURISDICTION; WAIVER OF
JURY TRIAL; WAIVER OF DAMAGES.

                  (a) THIS PLEDGE AGREEMENT SHALL BE GOVERNED BY AND INTERPRETED
UNDER THE LAWS OF THE STATE OF NEW YORK.

                  (b) THE COMPANY AGREES THAT THE TRUSTEE SHALL, IN ITS CAPACITY
AS TRUSTEE OR IN THE NAME AND ON BEHALF OF ANY HOLDER OF SENIOR NOTES, HAVE THE
RIGHT, TO THE EXTENT PERMITTED BY APPLICABLE LAW (AND TO THE EXTENT THE TRUSTEE
HAS RECEIVED INDEMNITY DEEMED SATISFACTORY TO IT AND HAS AGREED TO DO SO), TO
PROCEED AGAINST THE COMPANY OR THE COLLATERAL IN A COURT IN ANY LOCATION
REASONABLY SELECTED IN GOOD FAITH (AND HAVING PERSONAL OR IN REM JURISDICTION
OVER THE COMPANY OR THE COLLATERAL, AS THE CASE MAY BE) TO ENABLE THE TRUSTEE TO
REALIZE ON SUCH COLLATERAL, OR TO

                                       17
<PAGE>   18
ENFORCE A JUDGMENT OR OTHER COURT ORDER ENTERED IN FAVOR OF THE TRUSTEE. THE
COMPANY AGREES THAT IT WILL NOT ASSERT ANY COUNTERCLAIMS, SETOFFS OR CROSSCLAIMS
IN ANY PROCEEDING BROUGHT BY THE TRUSTEE TO REALIZE ON SUCH PROPERTY OR TO
ENFORCE A JUDGMENT OR OTHER COURT ORDER IN FAVOR OF THE TRUSTEE, EXCEPT FOR SUCH
COUNTERCLAIMS, SETOFFS OR CROSSCLAIMS WHICH, IF NOT ASSERTED IN ANY SUCH
PROCEEDING, COULD NOT OTHERWISE BE BROUGHT OR ASSERTED. THE COMPANY WAIVES, TO
THE FULLEST EXTENT IT MAY LEGALLY AND EFFECTIVELY DO SO, ANY OBJECTION THAT IT
MAY HAVE TO THE LOCATION OF THE COURT IN THE CITY OF NEW YORK IN THE BOROUGH OF
MANHATTAN ONCE THE TRUSTEE HAS COMMENCED A PROCEEDING DESCRIBED IN THIS
PARAGRAPH INCLUDING, WITHOUT LIMITATION, ANY OBJECTION TO THE LAYING OF VENUE OR
BASED ON THE GROUNDS OF FORUM NON CONVENIENS.

                  (c) THE COMPANY AGREES THAT NONE OF ANY HOLDER OF SENIOR
NOTES, (EXCEPT AS OTHERWISE PROVIDED IN THIS PLEDGE AGREEMENT OR THE INDENTURE)
STATE STREET IN ITS CAPACITY AS TRUSTEE OR STATE STREET IN ITS CAPACITY AS
COLLATERAL SECURITIES INTERMEDIARY SHALL HAVE ANY LIABILITY TO THE COMPANY
(WHETHER ARISING IN TORT, CONTRACT OR OTHERWISE) FOR LOSSES SUFFERED BY THE
COMPANY IN CONNECTION WITH, ARISING OUT OF, OR IN ANY WAY RELATED TO, THE
TRANSACTIONS CONTEMPLATED AND THE RELATIONSHIP ESTABLISHED BY THIS PLEDGE
AGREEMENT, OR ANY ACT, OMISSION OR EVENT OCCURRING IN CONNECTION THEREWITH,
UNLESS IT IS DETERMINED BY A FINAL AND NONAPPEALABLE JUDGMENT OF A COURT THAT IS
BINDING ON THE TRUSTEE, COLLATERAL SECURITIES INTERMEDIARY OR SUCH HOLDER OF
SENIOR NOTES, AS THE CASE MAY BE, THAT SUCH LOSSES WERE THE RESULT OF ACTS OR
OMISSIONS ON THE PART OF THE TRUSTEE, COLLATERAL SECURITIES INTERMEDIARY OR SUCH
HOLDERS OF SENIOR NOTES, AS THE CASE MAY BE, CONSTITUTING BAD FAITH, GROSS
NEGLIGENCE OR WILLFUL MISCONDUCT.

                  (d) TO THE EXTENT PERMITTED BY APPLICABLE LAW, THE COMPANY
WAIVES THE POSTING OF ANY BOND OTHERWISE REQUIRED OF THE TRUSTEE OR ANY HOLDER
OF SENIOR NOTES IN CONNECTION WITH ANY JUDICIAL PROCESS OR PROCEEDING TO ENFORCE
ANY JUDGMENT OR OTHER COURT ORDER PERTAINING TO THIS PLEDGE AGREEMENT OR ANY
RELATED AGREEMENT OR DOCUMENT ENTERED IN FAVOR OF THE TRUSTEE OR ANY HOLDER OF
SENIOR NOTES, OR TO ENFORCE BY SPECIFIC PERFORMANCE, TEMPORARY RESTRAINING ORDER
OR PRELIMINARY OR PERMANENT INJUNCTION, THIS PLEDGE AGREEMENT OR ANY RELATED
AGREEMENT OR DOCUMENT BETWEEN THE COMPANY ON THE ONE HAND AND THE TRUSTEE AND/OR
THE HOLDERS OF THE SENIOR NOTES ON THE OTHER HAND.

             [THE REMAINDER OF THIS PAGE LEFT INTENTIONALLY BLANK.]

                                       18
<PAGE>   19
         IN WITNESS WHEREOF, the Company and the Trustee have each caused this
Pledge Agreement to be duly executed and delivered as of the date first above
written.

                                           Company:

                                           LEAP WIRELESS INTERNATIONAL, INC.

                                           By: /s/ James E. Hoffmann
                                               ---------------------------------
                                               Name:  James E. Hoffmann
                                               Title: Sr. Vice President

                                           Trustee:

                                           STATE STREET BANK AND TRUST COMPANY

                                           By: /s/ Elizabeth C. Hammer
                                               ---------------------------------
                                               Name:  Elizabeth C. Hammer
                                               Title: Vice President

                                           Collateral Securities Intermediary:

                                           STATE STREET BANK AND TRUST COMPANY

                                           By: /s/ Elizabeth C. Hammer
                                               ---------------------------------
                                               Name:  Elizabeth C. Hammer
                                               Title: Vice President

                                      S-1<PAGE>   1
                                                                     EXHIBIT 4.3

                                WARRANT AGREEMENT

                          Dated as of February 23, 2000

                                 by and between

                        LEAP WIRELESS INTERNATIONAL, INC.

                                       and

                       STATE STREET BANK AND TRUST COMPANY

                                as Warrant Agent

<PAGE>   2

<TABLE>
<S>                                                                                              <C>
SECTION 1.            Certain Definitions..................................................        1

SECTION 2.            Appointment of Warrant Agent.........................................        7

SECTION 3.            Issuance of Warrants; Warrant Certificates...........................        7

SECTION 4.            Separation of Warrants...............................................       24

SECTION 5.            Registration and Countersignature....................................       24

SECTION 6.            Terms of Warrants; Exercise of Warrants..............................       24

SECTION 7.            Mandatory Disposition or Redemption Pursuant to FCC Regulations......       27

SECTION 8.            Payment of Taxes.....................................................       28

SECTION 9.            Reservation of Warrant Shares........................................       28

SECTION 10.           Obtaining Stock Exchange Listings....................................       29

SECTION 11.           Adjustment of Exercise Price and Number of Warrant Shares
                      Issuable.............................................................       29

SECTION 12.           Statement on Warrants................................................       35

SECTION 13.           No Dilution or impairment; Capital and Ownership Structure...........       35

SECTION 14.           Fractional Interest..................................................       36

SECTION 15.           Notices to Warrant Holders; No Rights as Shareholders................       36

SECTION 16.           Merger, Consolidation or Change of Name of Warrant Agent.............       38

SECTION 17.           Warrant Agent........................................................       39

SECTION 18.           Resignation and Removal of Warrant Agent; Appointment of
                      Successor............................................................       42
</TABLE>

<PAGE>   3

<TABLE>
<S>                                                                                              <C>
SECTION 19.           Registration.........................................................       43

SECTION 20.           Reports..............................................................       43

SECTION 21.           Rule 144A and Rule 144...............................................       43

SECTION 22.           Notices to Company and Warrant Agent.................................       43

SECTION 23.           Supplements and Amendments...........................................       44

SECTION 24.           Successors...........................................................       44

SECTION 25.           Termination..........................................................       45

SECTION 26.           Governing Law........................................................       45

SECTION 27.           Benefits of This Agreement...........................................       45

SECTION 28.           Counterparts.........................................................       45
</TABLE>

                                       2

<PAGE>   4
                                WARRANT AGREEMENT

               WARRANT AGREEMENT, dated as of February 23, 2000 (the
"AGREEMENT"), by and between Leap Wireless International, Inc., a Delaware
corporation (the "COMPANY"), and State Street Bank and Trust Company, a state
chartered trust company organized under the laws of the Commonwealth of
Massachusetts as warrant agent (the "WARRANT AGENT").

                                   WITNESSETH

               WHEREAS, the Company proposes to issue warrants, as hereinafter
described, to purchase shares of Common Stock (as defined below), in connection
with the offering by the Company of (i) $225,000,000 representing 225,000 Units,
each Unit consisting of one 12 1/2% Series A Senior Note Due 2010 and one
warrant to purchase up to an aggregate of 5.146 shares of Common Stock (the
"Senior Note Warrants") and (ii) $668,000,000 representing 668,000 Units, each
Unit consisting of one 14 1/2% Series A Senior Discount Note Due 2010 and one
warrant to purchase up to an aggregate of 2.503 shares of Common Stock (the
"Senior Discount Warrants" and together with the Senior Note Warrants, the
"Warrants"). The Notes (as defined below) will be guaranteed by Cricket
Communications Holdings, Inc. (the "Guarantor").

               WHEREAS, the Company desires the Warrant Agent to act on behalf
of the Company, and the Warrant Agent is willing so to act, in connection with
the issuance of Warrant Certificates (as defined below) and other matters as
provided herein.

               NOW, THEREFORE, in consideration of the promises and the mutual
agreements herein set forth, and for the purpose of defining the respective
rights and obligations of the Company, the Warrant Agent and the Holders (as
defined below), the parties hereto agree as follows:

               SECTION 1. CERTAIN DEFINITIONS. As used in this Agreement, the
following terms shall have the following respective meanings:

               "144A GLOBAL WARRANT" means one or more Global Warrants
substantially in the form of Exhibit A hereto bearing the Global Warrant Legend
and the Private Placement Legend and deposited with or on behalf of, and
registered in the name of, the Depositary or its nominee that will be issued in
a denomination equal to the outstanding number of the Warrants sold in reliance
on Rule 144A.

               "AFFILIATE" of any Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such Person. For purposes of this definition, "control" (including,
with correlative meanings, the terms "controlling," "controlled by" and "under
common control with"), as used with respect to any Person shall mean the
possession, directly or indirectly, of the power to direct or cause the
direction of the management or policies of such specified Person, whether
through the ownership of voting securities, by agreement or otherwise; provided
that beneficial ownership of 10% or more of the voting securities of a Person
shall be deemed to be control.

<PAGE>   5
               "APPLICABLE PROCEDURES" means, with respect to any transfer or
exchange of or for beneficial interests in any Global Warrant, the rules and
procedures of the Depositary, Euroclear and Clearstream that apply to such
transfer or exchange.

               "BUSINESS DAY" means any day other than a Legal Holiday.

               "CASHLESS EXERCISE" means the exercise of a Warrant without the
payment of cash, by reducing the number of shares of Common Stock that would be
obtainable upon the exercise of a Warrant and payment of the Exercise Price in
cash so as to yield a number of shares of Common Stock issuable upon the
exercise of the Warrant equal to the product of (a) the number of shares of
Common Stock into which the Warrant is exercisable as of the date of exercise
(if the Exercise Price were being paid in cash) and (b) the Cashless Exercise
Ratio.

               "CASHLESS EXERCISE RATIO" shall equal a fraction, the numerator
of which is the excess of the Current Market Value per share of Common Stock on
the date of exercise of a Warrant over the Exercise Price per share as of the
such date and the denominator of which is the Current Market Value per share of
the Common Stock on the date of exercise of a Warrant.

               "CLEARSTREAM" means Clearstream International.

               "CLOSING DATE" means the date hereof.

               "COMMISSION" means the Securities and Exchange Commission.

               "COMMON EQUITY SECURITIES" means Common Stock and securities
convertible into, or exercisable or exchangeable for, Common Stock or rights or
options to acquire Common Stock or such other securities, excluding the
Warrants.

               "COMMON STOCK" means the common stock, par value $.0001 per
share, of the Company.

               "COMPANY" means Leap Wireless International, Inc., a Delaware
corporation, and its successors and assigns.

               "CURRENT MARKET VALUE" for any Share of Common Stock means (A) if
the Common Stock is publicly traded and listed on the Nasdaq National Market or
a national securities exchange, the average closing price as quoted on the
Nasdaq National Market of the Common Stock for each of the 10 trading days
immediately prior to the Exercise Date (or, if the Common Stock is listed on a
national securities exchange, the average closing price as reported on such
national securities exchange during such 10-trading-day period); or (B) if the
Common Stock is not publicly traded, or otherwise is not listed on a national
securities exchange, the fair market value shall be equal to the value per share
as determined in good faith by the Board of Directors of the Company.

               "DEFINITIVE WARRANT" means, individually and collectively, each
of the Restricted Definitive Warrants and the Unrestricted Definitive Warrants
in the form of a certificated Warrant registered in the name of the Holder
thereof and issued in accordance with Section 3.5 hereof, substantially in the
form of Exhibit A hereto except that such Warrant shall

                                       2

<PAGE>   6
not bear the Global Warrant Legend and shall not have the "Schedule of Exchanges
of Interests in the Global Warrant" attached thereto.

               "DEPOSITARY" means, with respect to the Warrants issuable or
issued, in whole or in part, in global form, the Person specified in Section 3.3
hereof as the Depositary with respect to the Warrants, and any and all
successors thereto appointed as Depositary hereunder and having become such
pursuant to the applicable provision of this Agreement.

               "DESIGNATED WARRANTS" means Warrants in an amount sufficient so
that after the disposition or redemption of such Warrants, such Holder's
ownership of equity securities (including options, warrants and securities
convertible into equity securities) of the Company shall be reduced to less than
the Permitted Maximum Percentage of the total equity securities of the Company
then outstanding.

               "DTC" means The Depository Trust Company.

               "EUROCLEAR" means Morgan Guaranty Trust Company of New York,
Brussels office, as operator of the Euroclear system.

               "EXCHANGE ACT" means the Securities Exchange Act of 1934, as
amended.

               "EXERCISE DATE" means any time on or after February 23, 2001.

               "EXERCISE PRICE" means the purchase price per share of Common
Stock to be paid upon the exercise of each Warrant in accordance with the terms
hereof, which price shall initially be $96.80 per share, subject to adjustment
from time to time pursuant to Sections 11 and 13 hereof.

               "EXPIRATION DATE" means 5:00 p.m., New York City time, on April
15, 2010.

               "FCC" means the Federal Communications Commission.

               "GLOBAL WARRANTS" means, individually and collectively, each of
the Restricted Global Warrants and the Unrestricted Global Warrants,
substantially in the form of Exhibit A hereto issued in accordance with Section
3.1(b) and 3.5 hereof.

               "GLOBAL WARRANT LEGEND" means the legend set forth in Section
3.5(g)(ii), which is required to be placed on all Global Warrants issued under
this Agreement.

               "HOLDER" means a person who holds of record any Warrants.

               "INDENTURE" means the indenture, dated February 23, 2000, among
the Company, the Guarantor and State Street Bank and Trust Company, the Trustee
relating to the Notes.

               "INDIRECT PARTICIPANT" means a Person who holds a beneficial
interest in a Global Warrant through a Participant.

                                       3

<PAGE>   7
               "INSTITUTIONAL ACCREDITED INVESTOR" means an institution that is
an "accredited investor" as defined in Rule 501(a)(1), (2), (3) or (7) under the
Securities Act, which is not also a QIB.

               "LEGAL HOLIDAY" means a Saturday, a Sunday or a day on which
banking institutions in the City of New York or at a place of payment are
authorized by law, regulation or executive order to remain closed. If a payment
date is a Legal Holiday at a place of payment, payment may be made at that place
on the next succeeding day that is not a Legal Holiday, and no interest shall
accrue on such payment for the intervening period.

               "LETTER OF TRANSMITTAL" means the letter of transmittal to be
prepared by the Company and sent to all Holders for use by such Holders in
connection with the Registration Statement.

               "NON-U.S. PERSON" means a Person who is not a U.S. Person.

               "NOTES" means the Senior Notes and the Senior Discount Notes of
the Company, being sold and issued pursuant to the Placement Agreement and the
Indenture, or any Notes exchanged therefor as contemplated by the Indenture and
the Registration Rights Agreement.

               "OFFICER" means, with respect to any Person, the Chairman of the
Board, the Chief Executive Officer, the President, the Chief Operating Officer,
the Chief Financial Officer, the Treasurer, any Assistant Treasurer, the
Controller, the Secretary, any Assistant Secretary or any Vice-President of such
Person.

               "OPINION OF COUNSEL" means an opinion from legal counsel who is
reasonably acceptable to the Warrant Agent in form and substance reasonably
acceptable to the Warrant Agent. The counsel may be an employee of or counsel to
the Company, any subsidiary of the Company or the Warrant Agent.

               "PARTICIPANT" means, with respect to the Depositary, Euroclear or
Clearstream, a Person who has an account with the Depositary, Euroclear or
Clearstream, respectively (and, with respect to DTC, shall include Euroclear and
Clearstream).

               "PERMITTED MAXIMUM PERCENTAGE" means 15% as of the date of this
Agreement, as such percentage may be reduced, increased or otherwise modified
from time to time by the FCC.

               "PERSON" means any individual, corporation, limited liability
company, partnership, joint venture, association, joint-stock company, trust,
unincorporated organization or government or any agency or political subdivision
thereof, including any subdivision or ongoing business of any such entity or
substantially all of the assets of any such entity, subdivision or business.

               "PLACEMENT AGENTS" means Morgan Stanley & Co. Incorporated,
Donaldson, Lufkin & Jenrette Securities Corporation, Bear, Stearns & Co. Inc.,
ABN AMRO Incorporated and Credit Suisse First Boston Corporation.

                                       4

<PAGE>   8
               "PLACEMENT AGREEMENT" means the Placement Agreement, dated as of
February 16, 2000, by and among the Company, the Guarantor and the Placement
Agents relating to the Units.

               "PRIVATE PLACEMENT LEGEND" means the legend set forth in Section
3.5(g)(i) to be placed on all Warrants issued under this Warrant Agreement
except where otherwise permitted by the provisions of this Warrant Agreement.

               "QIB" means a "qualified institutional buyer" as defined in Rule
144A.

               "QUALCOMM" means Qualcomm Incorporated.

               "REGISTRABLE SECURITIES" shall have the meaning ascribed to such
term in the Warrant Registration Rights Agreement.

               "REGISTRATION RIGHTS AGREEMENT" means the registration rights
agreement, dated as of February 23, 2000, by and among the Company, the
Guarantor and the Placement Agents relating to the Notes.

               "REGISTRATION STATEMENT" shall have the meaning ascribed to such
term in the Warrant Registration Rights Agreement.

               "REGULATION S" means Regulation S promulgated under the
Securities Act.

               "REGULATION S GLOBAL WARRANT" means a Global Warrant in the form
of Exhibit A hereto bearing the Global Warrant Legend, the Private Placement
Legend and the Regulation S Legend and deposited with or on behalf of and
registered in the-name of the Depositary or its nominee, issued in a
denomination equal to the outstanding number of the Warrants resold in reliance
on Rule 903 or Rule 904 of Regulation S, which shall have a zero balance
following the initial resale of the Warrants.

               "RESPONSIBLE OFFICER" means, when used with respect to the
Warrant Agent, any officer of the Warrant Agent, including any vice president,
assistant vice president, assistant secretary, assistant treasurer or any other
officer of the Warrant Agent who customarily performs functions similar to those
performed by the Persons who at the time shall be such officers, respectively,
or to whom any corporate trust matter is referred because of such person's
knowledge of and familiarity with the particular subject and who shall have
direct responsibility for the administration of the Warrant Agreement.

               "REGULATION S LEGEND" means the legend set forth in Section
3.5(g)(iv) to be placed on all Registrable Securities resold pursuant to
Regulation S.

               "RESTRICTED DEFINITIVE WARRANT" means a Definitive Warrant
bearing the Private Placement Legend.

               "RESTRICTED GLOBAL WARRANT" means a Global Warrant bearing the
Private Placement Legend.

                                       5

<PAGE>   9
               "RULE 144" means Rule 144 promulgated under the Securities Act.

               "RULE 144A" means Rule 144A promulgated under the Securities Act.

               "RULE 903" means Rule 903 promulgated under the Securities Act.

               "RULE 904" means Rule 904 promulgated under the Securities Act.

               "SECURITIES ACT" means the Securities Act of 1933, as amended.

               "SENIOR NOTES" means the 12 1/2% Series A Senior Notes Due 2010
of the Company.

               "SENIOR DISCOUNT NOTES" means the 14 1/2% Series A Senior
Discount Notes Due 2010 of the Company.

               "SEPARATION DATE" means, subject to Section 7 below, the earliest
of (i) the date that is six months following the initial sale of the Units; (ii)
the commencement of the Exchange Offer (as defined in the Registration Rights
Agreement); (iii) the date a Shelf Registration Statement (as defined in the
Registration Rights Agreement) with respect to the Notes is declared effective
under the Securities Act; (iv) such date as Morgan Stanley & Co. Incorporated
shall determine; and (v) upon an offer to purchase upon a change of control of
the Company or a permitted optional redemption of the Senior Notes or Senior
Discount Notes, as applicable, in each case upon the terms and conditions of the
Indenture.

               "TRUSTEE" means State Street Bank and Trust Company, a state
chartered trust company organized under the laws of the Commonwealth of
Massachusetts, the trustee under the Indenture.

               "UNRESTRICTED GLOBAL WARRANT" means a Global Warrant
substantially in the form of Exhibit A attached hereto that bears the Global
Warrant Legend and that has the "Schedule of Exchanges of Interests in the
Global Warrant" attached thereto, and that is deposited with or on behalf of and
registered in the name of the Depositary, representing a series of Warrants that
do not bear the Private Placement Legend.

               "UNRESTRICTED DEFINITIVE WARRANT" means one or more Definitive
Warrants that do not bear and are not required to bear the Private Placement
Legend.

               "U.S. PERSON" means a U.S. person as defined in Rule 902(k) under
the Securities Act.

               "WARRANT AGENT" means State Street Bank and Trust Company or the
successor or successors of such Warrant Agent appointed in accordance with the
terms hereof.

               "WARRANT COUNTERSIGNATURE ORDER" has the meaning assigned to such
term in Section 3.2 hereof.

                                       6

<PAGE>   10
               "WARRANT CERTIFICATE" has the meaning assigned to such term in
Section 3.1(a) hereof.

               "WARRANT REGISTRAR" has the meaning assigned to such term in
Section 3.3 hereof.

               "WARRANT REGISTRATION RIGHTS AGREEMENT" means the registration
rights agreement, dated as of February 23, 2000, by and among the Company and
the Placement Agents relating to the Warrants and the Warrant Shares.

               "WARRANT SHARES" means the shares of Common Stock issued or
issuable upon the exercise of the Warrants.

               SECTION 2. APPOINTMENT OF WARRANT AGENT. The Company hereby
appoints the Warrant Agent to act as agent for the Company in accordance with
the instructions set forth hereinafter in this Agreement, and the Warrant Agent
hereby accepts such appointment.

               SECTION 3. ISSUANCE OF WARRANTS; WARRANT CERTIFICATES.

                      3.1 FORM AND DATING.

                      (a) General.

               The Warrants shall be substantially in the form of Exhibit A
hereto (the "WARRANT CERTIFICATES"). The Warrants may have notations, legends or
endorsements required by law, stock exchange rule or usage. Each Warrant shall
be dated the date of the countersignature.

               The terms and provisions contained in the Warrants shall
constitute, and are hereby expressly made, a part of this Warrant Agreement. The
Company and the Warrant Agent, by their execution and delivery of this Warrant
Agreement, expressly agree to such terms and provisions and to be bound thereby.
However, to the extent any provision of any Warrant conflicts with the express
provisions of this Warrant Agreement, the provisions of this Warrant Agreement
shall govern and be controlling.

                      (b) Global Warrants.

               Each Global Warrant shall represent such of the outstanding
Warrants as shall be specified therein and each shall provide that it shall
represent the number of outstanding Warrants from time to time endorsed thereon
and that the number of outstanding Warrants represented thereby may from time to
time be reduced or increased, as appropriate, to reflect exchanges and
redemptions. Any endorsement of a Global Warrant to reflect the amount of any
increase or decrease in the number of outstanding Warrants represented thereby
shall be made by the Warrant Agent in accordance with instructions given by the
Holder thereof as required by Section 3.5 hereof.

                                       7

<PAGE>   11
                      (c) Euroclear and Clearstream Procedures Applicable.

               The provisions of the "Operating Procedures of the Euroclear
System" and "Terms and Conditions Governing Use of Euroclear" and the "General
Terms and Conditions of Clearstream" and "Customer Handbook" of Clearstream
shall be applicable to transfers of beneficial interests in the Regulation S
Global Warrant that are held by Participants through Euroclear or Clearstream.

                      3.2 EXECUTION.

               An Officer shall sign the Warrants for the Company by manual or
facsimile signature.

               If the Officer whose signature is on a Warrant no longer holds
that office at the time a Warrant is countersigned, the Warrant shall
nevertheless be valid.

               A Warrant shall not be valid until countersigned by the manual
signature of the Warrant Agent. The signature shall be conclusive evidence that
the Warrant has been properly issued under this Warrant Agreement.

               The Warrant Agent shall, upon a written order of the Company
signed by an Officer (a "WARRANT COUNTERSIGNATURE ORDER"), countersign Warrants
for original issue up to the number stated in the preamble hereto.

               The Warrant Agent may appoint an agent acceptable to the Company
to countersign Warrants. Such an agent may countersign Warrants whenever the
Warrant Agent may do so. Each reference in this Warrant Agreement to a
countersignature by the Warrant Agent includes a countersignature by such agent.
Such an agent has the same rights as the Warrant Agent to deal with the Company
or an Affiliate of the Company.

                      3.3 WARRANT REGISTRAR.

               The Company shall maintain an office or agency where Warrants may
be presented for registration of transfer or for exchange (the "WARRANT
REGISTRAR"). The Warrant Registrar shall keep a register of the Warrants and of
their transfer and exchange. The Company may appoint one or more co-Warrant
Registrars. The term "Warrant Registrar" includes any co-Warrant Registrar. The
Company may change any Warrant Registrar without notice to any holder. The
Company shall notify the Warrant Agent in writing of the name and address of any
Warrant Registrar not a party to this Warrant Agreement. If the Company fails to
appoint or maintain another entity as Warrant Registrar, the Warrant Agent shall
act as such. The Company or any of its subsidiaries may act as Warrant
Registrar.

               The Company initially appoints DTC to act as Depositary with
respect to the Global Warrants.

               The Company initially appoints the Warrant Agent to act as the
Warrant Registrar with respect to the Global Warrants.

                                       8

<PAGE>   12
                      3.4 HOLDER LISTS.

               The Warrant Agent shall preserve in as current a form as is
reasonably practicable the most recent list available to it of the names and
addresses of all Holders. If the Warrant Agent is not the Warrant Registrar, the
Company shall promptly furnish to the Warrant Agent at such times as the Warrant
Agent may request in writing, a list in such form and as of such date as the
Warrant Agent may reasonably require of the names and addresses of the Holders.

                      3.5 TRANSFER AND EXCHANGE.

                      (a) Transfer and Exchange of Global Warrants. A Global
Warrant may not be transferred as a whole except by the Depositary to a nominee
of the Depositary, by a nominee of the Depositary to the Depositary or to
another nominee of the Depositary, or by the Depositary or any such nominee to a
successor Depositary or a nominee of such successor Depositary. All Global
Warrants will be exchanged by the Company for Definitive Warrants if (i) the
Company delivers to the Warrant Agent notice from the Depositary that it is
unwilling or unable to continue to act as Depositary or that it is no longer a
clearing agency registered under the Exchange Act and, in either case, a
successor Depositary is not appointed by the Company within 90 days after the
date of such notice from the Depositary or (ii) the Company in its sole
discretion determines that the Global Warrants (in whole but not in part) should
be exchanged for Definitive Warrants and delivers a written notice to such
effect to the Warrant Agent. Upon the occurrence of either of the preceding
events in (i) or (ii) above, Definitive Warrants shall be issued in such names
as the Depositary shall instruct the Warrant Agent. Global Warrants also may be
exchanged or replaced, in whole or in part, as provided in Sections 3.6 and 3.7
hereof. Every Warrant countersigned and delivered in exchange for, or in lieu
of, a Global Warrant or any portion thereof, pursuant to this Section 3.5 or
Sections 3.6 or 3.7 hereof, shall be countersigned and delivered in the form of,
and shall be, a Global Warrant. A Global Warrant may not be exchanged for
another Warrant other than as provided in this Section 3.5(a), however,
beneficial interests in a Global Warrant may be transferred and exchanged as
provided in Section 3.5(b), (c) or (f) hereof.

                      (b) Transfer and Exchange of Beneficial Interests in the
Global Warrants. The transfer and exchange of beneficial interests in the Global
Warrants shall be effected through the Depositary, in accordance with the
provisions of this Warrant Agreement and the Applicable Procedures. Beneficial
interests in the Restricted Global Warrants shall be subject to restrictions on
transfer comparable to those set forth herein to the extent required by the
Securities Act. Transfers of beneficial interests in the Global Warrants also
shall require compliance with either subparagraph (i) or (ii) below, as
applicable, as well as one or more of the other following subparagraphs, as
applicable:

                         (i) Transfer of Beneficial Interests in the Same Global
                    Warrant. Beneficial interests in any Restricted Global
                    Warrant may be transferred to Persons who take delivery
                    thereof in the form of a beneficial interest in the same
                    Restricted Global Warrant in accordance with the transfer
                    restrictions set forth in the Private Placement Legend.
                    Beneficial interests in any Unrestricted Global Warrant may
                    be transferred to Persons who take delivery thereof in the
                    form of a beneficial interest in an Unrestricted Global
                    Warrant. No written orders

                                       9

<PAGE>   13
                    or instructions shall be required to be delivered to the
                    Warrant Registrar to effect the transfers described in this
                    Section 3.5(b)(i).

                         (ii) All Other Transfers and Exchanges of Beneficial
                    Interests in Global Warrants. In connection with all
                    transfers and exchanges of beneficial interests that are not
                    subject to Section 3.5(b)(i) above, the transferor of any
                    such beneficial interest must deliver to the Warrant
                    Registrar either (A) (1) a written order from a Participant
                    or an Indirect Participant given to the Depositary in
                    accordance with the Applicable Procedures directing the
                    Depositary to credit or cause to be credited a beneficial
                    interest in another Global Warrant in an amount equal to the
                    beneficial interest to be transferred or exchanged and (2)
                    instructions given in accordance with the Applicable
                    Procedures containing information regarding the Participant
                    account to be credited with such increase or (B) (1) a
                    written order from a Participant or an Indirect Participant
                    given to the Depositary in accordance with the Applicable
                    Procedures directing the Depositary to cause to be issued a
                    Definitive Warrant in an amount equal to the beneficial
                    interest to be transferred or exchanged and (2) instructions
                    given by the Depositary to the Warrant Registrar containing
                    information regarding the Person in whose name such
                    Definitive Warrant shall be registered. Upon effectiveness
                    of the Registration Statement in accordance with Section
                    3.5(f) hereof, the requirements of this Section 3.5(b)(ii)
                    shall be deemed to have been satisfied upon receipt by the
                    Warrant Registrar of the instructions contained in the
                    Letter of Transmittal delivered by the Holder of such
                    beneficial interests in the Restricted Global Warrants. Upon
                    satisfaction of all of the requirements for transfer or
                    exchange of beneficial interests in Global Warrants
                    contained in this Agreement and the Warrants or otherwise
                    applicable under the Securities Act, the Warrant Agent shall
                    adjust the principal amount of the relevant Global
                    Warrant(s) pursuant to Section 3.5(h) hereof.

                         (iii) Transfer of Beneficial Interests to Another
                    Restricted Global Warrant. A beneficial interest in any
                    Restricted Global Warrant may be transferred to a Person who
                    takes delivery thereof in the form of a beneficial interest
                    in another Restricted Global Warrant if the transfer
                    complies with the requirements of Section 3.5(b)(ii) above
                    and the Warrant Registrar receives:

                                    (A) if the transferee will take delivery in
                      the form of a beneficial interest in the 144A Global
                      Warrant, then the transferor must deliver a certificate in
                      the form of Exhibit B hereto, including the certifications
                      in item (1) thereof; and

                                    (B) if the transferee will take delivery in
                      the form of a beneficial interest in the Regulation S
                      Global Warrant, then the transferor must deliver a
                      certificate in the form of Exhibit B hereto, including the
                      certifications in item (2) thereof.

                         (iv) Transfer and Exchange of Beneficial Interests in a
                    Restricted Global Warrant for Beneficial Interests in the
                    Unrestricted Global

                                       10

<PAGE>   14
                    Warrant. A beneficial interest in any Restricted Global
                    Warrant may be exchanged by any Holder thereof for a
                    beneficial interest in an Unrestricted Global Warrant or
                    transferred to a Person who takes delivery thereof in the
                    form of a beneficial interest in an Unrestricted Global
                    Warrant if the exchange or transfer complies with the
                    requirements of Section 3.5(b)(ii) above and:

                                    (A) such transfer is effected pursuant to
                      the Registration Statement in accordance with the Warrant
                      Registration Rights Agreement; or

                                    (B) the Warrant Registrar receives the
                      following:

                                            (1) if the holder of such beneficial
                                    interest in a Restricted Global Warrant
                                    proposes to exchange such beneficial
                                    interest for a beneficial interest in an
                                    Unrestricted Global Warrant, a certificate
                                    from such holder in the form of Exhibit C
                                    hereto, including the certifications in item
                                    (1)(a) thereof; or

                                            (2) if the holder of such beneficial
                                    interest in a Restricted Global Warrant
                                    proposes to transfer such beneficial
                                    interest to a Person who shall take delivery
                                    thereof in the form of a beneficial interest
                                    in an Unrestricted Global Warrant, a
                                    certificate from such holder in the form of
                                    Exhibit B hereto, including the
                                    certifications in item (4) thereof;

               and, in each such case set forth in this subparagraph (B), if the
               Warrant Registrar so requests or if the Applicable Procedures so
               require, an Opinion of Counsel in form reasonably acceptable to
               the Warrant Registrar to the effect that such exchange or
               transfer is in compliance with the Securities Act and that the
               restrictions on transfer contained herein and in the Private
               Placement Legend are no longer required in order to maintain
               compliance with the Securities Act.

               If any such transfer is effected pursuant to subparagraph (B)
above at a time when an Unrestricted Global Warrant has not yet been issued, the
Company shall issue and, upon receipt of a Warrant Countersignature Order in
accordance with Section 3.2 hereof, the Warrant Agent shall countersign one or
more Unrestricted Global Warrants in the number equal to the number of
beneficial interests transferred pursuant to subparagraph (B) above.

                      (c) Transfer and Exchange of Beneficial Interests for
Definitive Warrants.

                         (i) Beneficial Interests in Restricted Global Warrants
                    to Restricted Definitive Warrants. If any holder of a
                    beneficial interest in a Restricted Global Warrant proposes
                    to exchange such beneficial interest for a Restricted
                    Definitive Warrant or to transfer such beneficial interest
                    to a Person

                                       11

<PAGE>   15
                    who takes delivery thereof in the form of a Restricted
                    Definitive Warrant, then, upon receipt by the Warrant
                    Registrar of the following documentation:

                                    (A) if the holder of such beneficial
                      interest in a Restricted Global Warrant proposes to
                      exchange such beneficial interest for a Restricted
                      Definitive Warrant, a certificate from such holder in the
                      form of Exhibit C hereto, including the certifications in
                      item (2)(a) thereof;

                                    (B) if such beneficial interest is being
                      transferred to a QIB in accordance with Rule 144A under
                      the Securities Act, a certificate to the effect set forth
                      in Exhibit B hereto, including the certifications in item
                      (1) thereof;

                                    (C) if such beneficial interest is being
                      transferred to a Non-U.S. Person in an offshore
                      transaction in accordance with Rule 903 or Rule 904 under
                      the Securities Act, a certificate to the effect set forth
                      in Exhibit B hereto, including the certifications in item
                      (2) thereof;

                                    (D) if such beneficial interest is being
                      transferred pursuant to an exemption from the registration
                      requirements of the Securities Act in accordance with Rule
                      144 under the Securities Act, a certificate to the effect
                      set forth in Exhibit B hereto, including the
                      certifications in item (3)(a) thereof;

                                    (E) if such beneficial interest is being
                      transferred to an Institutional Accredited Investor in
                      reliance on an exemption from the registration
                      requirements of the Securities Act other than those listed
                      in subparagraphs (B) through (D) above, a certificate to
                      the effect set forth in Exhibit B hereto, including the
                      certifications, certificates and Opinion of Counsel
                      required by item (3) thereof, if applicable;

                                    (F) if such beneficial interest is being
                      transferred to the Company or any of its Subsidiaries, a
                      certificate to the effect set forth in Exhibit B hereto,
                      including the certifications in item (3)(b) thereof; or

                                    (G) if such beneficial interest is being
                      transferred pursuant to an effective registration
                      statement under the Securities Act, a certificate to the
                      effect set forth in Exhibit B hereto, including the
                      certifications in item (3)(c) thereof,

               the Warrant Agent shall cause, in accordance with the standing
               instructions and procedures existing between the Depositary and
               the Warrant Agent, the number of Warrants represented by the
               Global Warrant to be reduced by the number of Warrants to be
               represented by the Definitive Warrant pursuant to Section 3.5(h)
               hereof, and the Company shall execute and the Warrant Agent shall
               countersign and deliver to the Person designated in the
               instructions a Definitive Warrant in the appropriate amount. Any
               Definitive Warrant issued in exchange for a beneficial

                                       12

<PAGE>   16
               interest in a Restricted Global Warrant pursuant to this Section
               3.5(c) shall be registered in such name or names as the holder of
               such beneficial interest shall instruct the Warrant Registrar
               through instructions from the Depositary and the Participant or
               Indirect Participant. The Warrant Agent shall deliver such
               Definitive Warrants to the Persons in whose names such Warrants
               are so registered. Any Definitive Warrant issued in exchange for
               a beneficial interest in a Restricted Global Warrant pursuant to
               this Section 3.5(c)(i) shall bear the Private Placement Legend
               and shall be subject to all restrictions on transfer contained
               therein.

                             (ii) Beneficial Interests in Restricted Global
               Warrants to Unrestricted Definitive Warrants. A holder of a
               beneficial interest in a Restricted Global Warrant may exchange
               such beneficial interest for an Unrestricted Definitive Warrant
               or may transfer such beneficial interest to a Person who takes
               delivery thereof in the form of an Unrestricted Definitive
               Warrant only if:

                                    (A) such transfer is effected pursuant to
                      the Registration Statement in accordance with the Warrant
                      Registration Rights Agreement; or

                                    (B) the Warrant Registrar receives the
                      following:

                                            (1) if the holder of such beneficial
                                    interest in a Restricted Global Warrant
                                    proposes to exchange such beneficial
                                    interest for a Definitive Warrant that does
                                    not bear the Private Placement Legend, a
                                    certificate from such holder in the form of
                                    Exhibit C hereto, including the
                                    certifications in item (1)(b) thereof; or

                                            (2) if the holder of such beneficial
                                    interest in a Restricted Global Warrant
                                    proposes to transfer such beneficial
                                    interest to a Person who shall take delivery
                                    thereof in the form of a Definitive Warrant
                                    that does not bear the Private Placement
                                    Legend, a certificate from such holder in
                                    the form of Exhibit B hereto, including the
                                    certifications in item (4) thereof;

        and, in each such case set forth in this subparagraph (B), if the
        Warrant Registrar so requests or if the Applicable Procedures so
        require, an Opinion of Counsel in form reasonably acceptable to the
        Warrant Registrar to the effect that such exchange or transfer is in
        compliance with the Securities Act and that the restrictions on transfer
        contained herein and in the Private Placement Legend are no longer
        required in order to maintain compliance with the Securities Act.

                         (iii) Beneficial Interests in Unrestricted Global
                    Warrants to Unrestricted Definitive Warrants. If any holder
                    of a beneficial interest in an Unrestricted Global Warrant
                    proposes to exchange such beneficial interest for an

                                       13

<PAGE>   17
                    Unrestricted Definitive Warrant or to transfer such
                    beneficial interest to a Person who takes delivery thereof
                    in the form of an Unrestricted Definitive Warrant, then,
                    upon satisfaction of the conditions set forth in Section
                    3.5(b)(ii) hereof, the Warrant Agent shall cause the amount
                    of the applicable Unrestricted Global Warrant to be reduced
                    accordingly pursuant to Section 3.5(h) hereof, and the
                    Company shall execute and the Warrant Agent shall
                    countersign and deliver to the Person designated in the
                    instructions an Unrestricted Definitive Warrant in the
                    appropriate principal amount. Any Unrestricted Definitive
                    Warrant issued in exchange for a beneficial interest
                    pursuant to this Section 3.5(c)(iii) shall be registered in
                    such name or names and in such authorized denomination or
                    denominations as the holder of such beneficial interest
                    shall instruct the Warrant Registrar through instructions
                    from the Depositary and the Participant or Indirect
                    Participant. The Warrant Agent shall deliver such
                    Unrestricted Definitive Warrants to the Persons in whose
                    names such Warrants are so registered. Any Unrestricted
                    Definitive Warrant issued in exchange for a beneficial
                    interest pursuant to this Section 3.5(c)(iii) shall not bear
                    the Private Placement Legend.

                      (d) Transfer and Exchange of Definitive Warrants for
Beneficial Interests.

                         (i) Restricted Definitive Warrants to Beneficial
                    Interests in Restricted Global Warrants. If any Holder of a
                    Restricted Definitive Warrant proposes to exchange such
                    Warrant for a beneficial interest in a Restricted Global
                    Warrant or to transfer such Restricted Definitive Warrants
                    to a Person who takes delivery thereof in the form of a
                    beneficial interest in a Restricted Global Warrant, then,
                    upon receipt by the Warrant Registrar of the following
                    documentation:

                                    (A) if the Holder of such Restricted
                      Definitive Warrant proposes to exchange such Warrant for a
                      beneficial interest in a Restricted Global Warrant, a
                      certificate from such Holder in the form of Exhibit C
                      hereto, including the certifications in item (2)(b)
                      thereof;

                                    (B) if such Restricted Definitive Warrant is
                      being transferred to a QIB in accordance with Rule 144A
                      under the Securities Act, a certificate to the effect set
                      forth in Exhibit B hereto, including the certifications in
                      item (1) thereof;

                                    (C) if such Restricted Definitive Warrant is
                      being transferred to a Non-U.S. Person in an offshore
                      transaction in accordance with Rule 903 or Rule 904 under
                      the Securities Act, a certificate to the effect set forth
                      in Exhibit B hereto, including the certifications in item
                      (2) thereof;

                                    (D) if such Restricted Definitive Warrant is
                      being transferred pursuant to an exemption from the
                      registration requirements of the Securities Act in
                      accordance with Rule 144 under the Securities Act, a

                                       14

<PAGE>   18
                      certificate to the effect set forth in Exhibit B hereto,
                      including the certifications in item (3)(a) thereof;

                                    (E) if such Restricted Definitive Warrant is
                      being transferred to the Company or any of its
                      Subsidiaries, a certificate to the effect set forth in
                      Exhibit B hereto, including the certifications in item
                      (3)(b) thereof; or

                                    (F) if such Restricted Definitive Warrant is
                      being transferred pursuant to an effective registration
                      statement under the Securities Act, a certificate to the
                      effect set forth in Exhibit B hereto, including the
                      certifications in item (3)(c) thereof,

        the Warrant Agent shall cancel the Restricted Definitive Warrant,
        increase or cause to be increased the amount of, in the case of clause
        (A) above, the appropriate Restricted Global Warrant, in the case of
        clause (B) above, the 144A Global Warrant, and in the case of clause (C)
        above, the Regulation S Global Warrant.

                         (ii) Restricted Definitive Warrants to Beneficial
                    Interests in Unrestricted Global Warrants. A Holder of a
                    Restricted Definitive Warrant may exchange such Warrant for
                    a beneficial interest in an Unrestricted Global Warrant or
                    transfer such Restricted Definitive Warrant to a Person who
                    takes delivery thereof in the form of a beneficial interest
                    in an Unrestricted Global Warrant only if:

                                    (A) such transfer is effected pursuant to
                      the Registration Statement in accordance with the Warrant
                      Registration Rights Agreement; or

                                    (B) the Warrant Registrar receives the
                      following:

                                            (1) if the Holder of such Definitive
                                    Warrants proposes to exchange such Warrants
                                    for a beneficial interest in the
                                    Unrestricted Global Warrant, a certificate
                                    from such Holder in the form of Exhibit C
                                    hereto, including the certifications in item
                                    (1)(c) thereof; or

                                            (2) if the Holder of such Definitive
                                    Warrants proposes to transfer such Warrants
                                    to a Person who shall take delivery thereof
                                    in the form of a beneficial interest in the
                                    Unrestricted Global Warrant, a certificate
                                    from such Holder in the form of Exhibit B
                                    hereto, including the certifications in item
                                    (4) thereof;

        and, in each such case set forth in this subparagraph (B), if the
        Warrant Registrar so requests or if the Applicable Procedures so
        require, an Opinion of Counsel in form reasonably acceptable to the
        Warrant Registrar to the effect that such exchange or transfer is in
        compliance with the Securities Act and that the restrictions on transfer

                                       15

<PAGE>   19
        contained herein and in the Private Placement Legend are no longer
        required in order to maintain compliance with the Securities Act.

        Upon satisfaction of the conditions of any of the subparagraphs in this
        Section 3.5(d)(ii), the Warrant Agent shall cancel the Definitive
        Warrants and increase or cause to be increased the aggregate amount of
        the applicable Unrestricted Global Warrant.

                         (iii) Unrestricted Definitive Warrants to Beneficial
                    Interests in Unrestricted Global Warrants. A Holder of an
                    Unrestricted Definitive Warrant may exchange such Warrant
                    for a beneficial interest in an Unrestricted Global Warrant
                    or transfer such Definitive Warrants to a Person who takes
                    delivery thereof in the form of a beneficial interest in an
                    Unrestricted Global Warrant at any time. Upon receipt of a
                    request for such an exchange or transfer, the Warrant Agent
                    shall cancel the applicable Unrestricted Definitive Warrant
                    and increase or cause to be increased the amount of one of
                    the Unrestricted Global Warrants.

        If any such exchange or transfer from a Definitive Warrant to a
        beneficial interest is effected pursuant to subparagraphs (ii)(B) or
        (iii) above at a time when an Unrestricted Global Warrant has not yet
        been issued, the Company shall issue and, upon receipt of a Warrant
        Countersignature Order in accordance with Section 3.2 hereof, the
        Warrant Agent shall countersign one or more Unrestricted Global Warrants
        in the number equal to the number of beneficial interests of Definitive
        Warrants so transferred.

                      (e) Transfer and Exchange of Definitive Warrants for
Definitive Warrants. Upon request by a Holder of Definitive Warrants and such
Holder's compliance with the provisions of this Section 3.5(e), the Warrant
Registrar shall register the transfer or exchange of Definitive Warrants. Prior
to such registration of transfer or exchange, the requesting Holder shall
present or surrender to the Warrant Registrar the Definitive Warrants duly
endorsed or accompanied by a written instruction of transfer in form
satisfactory to the Warrant Registrar duly executed by such Holder or by its
attorney, duly authorized in writing. In addition, the requesting Holder shall
provide any additional certifications, documents and information, as applicable,
required pursuant to the following provisions of this Section 3.5(e).

                         (i) Restricted Definitive Warrants to Restricted
                    Definitive Warrants. Any Restricted Definitive Warrant may
                    be transferred to and registered in the name of Persons who
                    take delivery thereof in the form of a Restricted Definitive
                    Warrant if the Warrant Registrar receives the following:

                                    (A) if the transfer will be made pursuant to
                      Rule 144A under the Securities Act, then the transferor
                      must deliver a certificate in the form of Exhibit B
                      hereto, including the certifications in item (1) thereof;

                                    (B) if the transfer will be made pursuant to
                      Rule 903 or Rule 904, then the transferor must deliver a
                      certificate in the form of Exhibit B hereto, including the
                      certifications in item (2) thereof; or

                                       16

<PAGE>   20
                                    (C) if the transfer will be made pursuant to
                      any other exemption from the registration requirements of
                      the Securities Act, then the transferor must deliver a
                      certificate in the form of Exhibit B hereto, including the
                      certifications, certificates and Opinion of Counsel
                      required by item (3) thereof, if applicable.

                             (ii) Restricted Definitive Warrants to Unrestricted
               Definitive Warrants. Any Restricted Definitive Warrant may be
               exchanged by the Holder thereof for an Unrestricted Definitive
               Warrant or transferred to a Person or Persons who take delivery
               thereof in the form of an Unrestricted Definitive Warrant if:

                                    (A) any such transfer is effected pursuant
                      to the Registration Statement in accordance with the
                      Warrant Registration Rights Agreement; or

                                    (B) the Warrant Registrar receives the
                      following:

                                            (1) if the Holder of such Restricted
                                    Definitive Warrants proposes to exchange
                                    such Warrants for an Unrestricted Definitive
                                    Warrant, a certificate from such Holder in
                                    the form of Exhibit C hereto, including the
                                    certifications in item (1)(d) thereof; or

                                            (2) if the Holder of such Restricted
                                    Definitive Warrants proposes to transfer
                                    such Warrants to a Person who shall take
                                    delivery thereof in the form of an
                                    Unrestricted Definitive Warrant, a
                                    certificate from such Holder in the form of
                                    Exhibit B hereto, including the
                                    certifications in item (4) thereof;

        and, in each such case set forth in this subparagraph (B), if the
        Warrant Registrar so requests, an Opinion of Counsel in form reasonably
        acceptable to the Company to the effect that such exchange or transfer
        is in compliance with the Securities Act and that the restrictions on
        transfer contained herein and in the Private Placement Legend are no
        longer required in order to maintain compliance with the Securities Act.

                             (iii) Unrestricted Definitive Warrants to
               Unrestricted Definitive Warrants. A Holder of Unrestricted
               Definitive Warrants may transfer such Warrants to a Person who
               takes delivery thereof in the form of an Unrestricted Definitive
               Warrant. Upon receipt of a request to register such a transfer,
               the Warrant Registrar shall register the Unrestricted Definitive
               Warrants pursuant to the instructions from the Holder thereof.

                      (f) Registration Statement. Upon the effectiveness of the
Registration Statement in accordance with the Warrant Registration Rights
Agreement, the Company shall issue and, upon receipt of a Warrant
Countersignature Order in accordance with Section 3.2, the Warrant Agent shall
countersign one or more Unrestricted Global Warrants in an amount up to

                                       17

<PAGE>   21
the amount of the beneficial interests in the Restricted Global Warrants covered
by such Shelf Registration Statement and concurrently with the resales or
exercise of Warrants pursuant to the Registration Statement, the Warrant Agent
shall cause the amount of the applicable Restricted Global Warrants to be
reduced accordingly, will increase the beneficial interests in the Unrestricted
Global Warrant or issue additional Unrestricted Definitive Warrants as provided
in this Section 3. Resales of Warrants represented by Restricted Definitive
Warrants pursuant to the Registration Statement shall be dealt with pursuant to
the provisions of this Section 3.

                      (g) Legends. The following legends shall appear on the
face of all Global Warrants and Definitive Warrants issued under this Warrant
Agreement unless specifically stated otherwise in the applicable provisions of
this Warrant Agreement.

                         (i) Private Placement Legend.

                                    (A) Except as permitted by subparagraph (B)
                      below, each Global Warrant and each Definitive Warrant
                      (and all Warrants issued in exchange therefor or
                      substitution thereof) shall bear the legend in
                      substantially the following form:

                         [THE WARRANTS/SHARES OF COMMON STOCK REPRESENTED BY
                    THIS CERTIFICATE] HAVE NOT BEEN REGISTERED UNDER THE U.S.
                    SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"),
                    AND ACCORDINGLY, MAY NOT BE OFFERED OR SOLD WITHIN THE
                    UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S.
                    PERSONS EXCEPT AS SET FORTH IN THE FOLLOWING SENTENCE. BY
                    ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT (A)
                    IT IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE
                    144A UNDER THE SECURITIES ACT) OR (B) IT IS AN INSTITUTIONAL
                    "ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(a)(1), (2),
                    (3) OR (7) OF REGULATION D UNDER THE SECURITIES ACT) (AN
                    "INSTITUTIONAL ACCREDITED INVESTOR") [OR (C) IT IS NOT A
                    U.S. PERSON AND IS ACQUIRING [THESE WARRANTS/THESE SHARES OF
                    COMMON STOCK REPRESENTED BY THIS CERTIFICATE] IN AN OFFSHORE
                    TRANSACTION IN COMPLIANCE WITH REGULATION S UNDER THE
                    SECURITIES ACT,] (2) AGREES THAT IT WILL NOT, WITHIN THE
                    TIME PERIOD REFERRED TO UNDER RULE 144(k) UNDER THE
                    SECURITIES ACT AS IN EFFECT ON THE DATE OF SUCH TRANSFER,
                    RESELL OR OTHERWISE TRANSFER [THESE WARRANTS/THESE SHARES OF
                    COMMON STOCK REPRESENTED BY THIS CERTIFICATE] EXCEPT (A) TO
                    LEAP OR ANY SUBSIDIARY THEREOF, (B) TO A QUALIFIED
                    INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE
                    SECURITIES ACT, (C) INSIDE THE UNITED STATES TO AN
                    INSTITUTIONAL ACCREDITED INVESTOR THAT, PRIOR TO SUCH
                    TRANSFER, FURNISHES TO THE [WARRANT AGENT/ TRANSFER AGENT
                    AND REGISTRAR] A SIGNED LETTER CONTAINING CERTAIN
                    REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS
                    ON TRANSFER OF

                                       18

<PAGE>   22
                    [THESE WARRANTS/ THESE SHARES OF COMMON STOCK REPRESENTED BY
                    THIS CERTIFICATE] (THE FORM OF WHICH LETTER CAN BE OBTAINED
                    FROM [WARRANT AGENT/TRANSFER AGENT AND REGISTRAR]) AND, IF
                    SUCH TRANSFER IS IN RESPECT OF ANY WARRANTS AFTER THE
                    SEPARATION DATE/ANY SHARES OF COMMON STOCK REPRESENTED BY
                    THIS CERTIFICATE], AN OPINION OF COUNSEL ACCEPTABLE TO LEAP
                    THAT SUCH TRANSFER IS IN COMPLIANCE WITH THE SECURITIES ACT,
                    (D) TO A PERSON OUTSIDE THE UNITED STATES IN AN OFFSHORE
                    TRANSACTION IN COMPLIANCE WITH REGULATION S UNDER THE
                    SECURITIES ACT [THAT, FOR ANY TRANSFER PRIOR TO ONE YEAR
                    AFTER CLOSING FURNISHES TO THE [WARRANT AGENT/ THE TRANSFER
                    AGENT AND REGISTRAR], PRIOR TO SUCH TRANSFER, A SIGNED
                    LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS
                    RELATING TO THE RESTRICTIONS ON TRANSFER OF THE
                    [WARRANT/SHARES OF COMMON STOCK REPRESENTED BY THIS
                    CERTIFICATE] (THE FORM OF WHICH LETTER CAN BE OBTAINED FROM
                    THE [WARRANT AGENT/THE TRANSFER AGENT AND REGISTRAR])], (E)
                    PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE
                    144 UNDER THE SECURITIES ACT (IF AVAILABLE) OR (F) PURSUANT
                    TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES
                    ACT AND (3) AGREES THAT IT WILL DELIVER TO EACH PERSON TO
                    WHOM [THESE WARRANTS/THESE SHARES OF COMMON STOCK
                    REPRESENTED BY THIS CERTIFICATE] ARE TRANSFERRED A NOTICE
                    SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. IN CONNECTION
                    WITH ANY TRANSFER OF [THESE WARRANTS/THESE SHARES OF COMMON
                    STOCK REPRESENTED BY THIS CERTIFICATE] WITHIN THE TIME
                    PERIOD REFERRED TO ABOVE, THE HOLDER MUST CHECK THE
                    APPROPRIATE BOX SET FORTH ON THE REVERSE HEREOF RELATING TO
                    THE MANNER OF SUCH TRANSFER AND SUBMIT THIS CERTIFICATE TO
                    [THE WARRANT AGENT/TRANSFER AGENT AND REGISTRAR]. IF THE
                    PROPOSED TRANSFEREE IS AN INSTITUTIONAL ACCREDITED INVESTOR,
                    THE HOLDER MUST , PRIOR TO SUCH TRANSFER, FURNISH TO THE
                    [WARRANT AGENT/TRANSFER AGENT AND REGISTRAR] AND LEAP SUCH
                    CERTIFICATIONS, LEGAL OPINIONS OR OTHER INFORMATION AS
                    EITHER OF THEM MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH
                    TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION FROM, OR IN
                    A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS
                    OF THE SECURITIES ACT. AS USED HEREIN, THE TERMS "OFFSHORE
                    TRANSACTION," "UNITED STATES" AND "U.S. PERSON" HAVE THE
                    MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES
                    ACT. THE WARRANT AGREEMENT CONTAINS A PROVISION REQUIRING
                    THE WARRANT AGENT TO REFUSE TO REGISTER ANY TRANSFER OF
                    [THESE WARRANTS/THESE

                                       19

<PAGE>   23
                    SHARES OF COMMON STOCK REPRESENTED BY THIS CERTIFICATE] IN
                    VIOLATION OF THE FOREGOING RESTRICTIONS.

                                    (B) Notwithstanding the foregoing, any
                      Global Warrant or Definitive Warrant issued pursuant to
                      subparagraphs (b)(iv), (c)(ii), (c)(iii), (d)(ii),
                      (d)(iii), (e)(ii), (e)(iii) or (f) to this Section 3.5
                      (and all Warrants issued in exchange therefor or
                      substitution thereof) shall not bear the Private Placement
                      Legend.

                         (ii) Global Warrant Legend. Each Global Warrant shall
                    bear a legend in substantially the following form:

                         "THIS GLOBAL WARRANT IS HELD BY THE DEPOSITARY (AS
                    DEFINED IN THE WARRANT AGREEMENT GOVERNING THIS WARRANT) OR
                    ITS NOMINEE IN CUSTODY FOR THE BENEFIT OF THE BENEFICIAL
                    OWNERS HEREOF, AND IS NOT TRANSFERABLE TO ANY PERSON UNDER
                    ANY CIRCUMSTANCES EXCEPT THAT (I) THE WARRANT AGENT MAY MAKE
                    SUCH NOTATIONS HEREON AS MAY BE REQUIRED PURSUANT TO SECTION
                    3.5 OF THE WARRANT AGREEMENT, (II) THIS GLOBAL WARRANT MAY
                    BE EXCHANGED OR TRANSFERRED PURSUANT TO SECTIONS 3.5(a), 3.6
                    AND 3.7 OF THE WARRANT AGREEMENT AND (III) THIS GLOBAL
                    WARRANT MAY BE DELIVERED TO THE WARRANT AGENT FOR
                    CANCELLATION PURSUANT TO SECTION 3.8 OF THE WARRANT
                    AGREEMENT."

                         (iii) Unit Legend. Each Warrant issued prior to the
                    Separation Date shall bear a legend in substantially the
                    following form:

                         THE WARRANTS EVIDENCED BY THIS CERTIFICATE ARE
                    INITIALLY ISSUED AS PART OF AN ISSUANCE OF (I) UNITS (THE
                    "UNITS"), WHICH CONSIST OF $225,000,000 PRINCIPAL AMOUNT AT
                    MATURITY OF THE 12 1/2% SENIOR NOTES DUE 2010 OF LEAP
                    WIRELESS INTERNATIONAL, INC. AND ONE WARRANT INITIALLY
                    ENTITLING THE HOLDER THEREOF TO PURCHASE 5.146 SHARES, PAR
                    VALUE $.0001 PER SHARE, OF LEAP WIRELESS INTERNATIONAL, INC.
                    AND (II) UNITS, WHICH CONSIST OF $668,000,000 PRINCIPAL
                    AMOUNT AT MATURITY ($325,102,240 INITIAL ACCRETED VALUE) OF
                    THE 14 1/2% SENIOR DISCOUNT NOTES (TOGETHER WITH THE SENIOR
                    NOTES, THE "NOTES") DUE 2010 OF LEAP WIRELESS INTERNATIONAL,
                    INC. AND ONE WARRANT INITIALLY ENTITLING THE HOLDER THEREOF
                    TO PURCHASE 2.503 SHARES, PAR VALUE $.0001 PER SHARE, OF
                    LEAP WIRELESS INTERNATIONAL, INC. (THE WARRANTS ISSUED IN
                    CONNECTION WITH THE SENIOR NOTES TOGETHER WITH THE WARRANTS
                    ISSUED IN CONNECTION WITH THE SENIOR DISCOUNT NOTES ARE
                    COLLECTIVELY REFERRED TO AS "WARRANTS".)

                                       20

<PAGE>   24
                         EXCEPT AS CONTEMPLATED BY SECTION 7 OF THE WARRANT
                    AGREEMENT, PRIOR TO THE EARLIEST TO OCCUR OF (I) THE DATE
                    THAT IS SIX MONTHS FOLLOWING THE INITIAL SALE OF UNITS, (II)
                    THE DATE ON WHICH A REGISTRATION STATEMENT WITH RESPECT TO A
                    REGISTERED EXCHANGE OFFER FOR THE NOTES IS DECLARED
                    EFFECTIVE UNDER THE SECURITIES ACT, (III) THE DATE ON WHICH
                    A SHELF REGISTRATION STATEMENT WITH RESPECT TO THE NOTES IS
                    DECLARED EFFECTIVE UNDER THE SECURITIES ACT, (IV) SUCH DATE
                    AS MORGAN STANLEY & CO. INCORPORATED IN ITS SOLE DISCRETION
                    SHALL DETERMINE AND (V) THE OCCURRENCE OF A CHANGE OF
                    CONTROL (AS DEFINED IN THE INDENTURE GOVERNING THE NOTES) OR
                    A PERMITTED OPTIONAL REDEMPTION OF THE SENIOR NOTES OR THE
                    SENIOR DISCOUNT NOTES, AS APPLICABLE (AS DEFINED IN THE
                    INDENTURE GOVERNING THE NOTES), THE WARRANTS EVIDENCED BY
                    THIS CERTIFICATE MAY NOT BE TRANSFERRED OR EXCHANGED
                    SEPARATELY FROM, BUT MAY BE TRANSFERRED OR EXCHANGED ONLY
                    TOGETHER WITH, THE NOTES.

                         (iv) Regulation S Legend. Each Warrant that is a
                    Registrable Security and issued pursuant to Regulation S
                    shall bear the following legends on the face thereof:

                         "THIS WARRANT AND THE SECURITIES TO BE ISSUED UPON ITS
                    EXERCISE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT
                    AND THE WARRANT MAY NOT BE EXERCISED BY OR ON BEHALF OF ANY
                    U.S. PERSON UNLESS REGISTERED UNDER THE U.S. SECURITIES ACT
                    OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR AN EXEMPTION
                    FROM SUCH REGISTRATION IS AVAILABLE. IN ORDER TO EXERCISE
                    THIS WARRANT, THE HOLDER MUST FURNISH TO THE COMPANY AND THE
                    WARRANT AGENT EITHER (A) A WRITTEN CERTIFICATION THAT IT IS
                    NOT A U.S. PERSON AND THE WARRANT IS NOT BEING EXERCISED ON
                    BEHALF OF A U.S. PERSON OR (B) A WRITTEN OPINION OF COUNSEL
                    TO THE EFFECT THAT THE SECURITIES DELIVERED UPON EXERCISE OF
                    THE WARRANT HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OR
                    THAT THE DELIVERY OF SUCH SECURITIES IS EXEMPT FROM THE
                    REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. TERMS IN
                    THIS LEGEND HAVE THE MEANINGS GIVEN TO THEM BY REGULATION S
                    UNDER THE SECURITIES ACT."

                         "HEDGING TRANSACTIONS INVOLVING THESE SECURITIES MAY
                    NOT BE CONDUCTED UNLESS IN COMPLIANCE WITH THE SECURITIES
                    ACT."

                                       21

<PAGE>   25
                      (h) Cancellation and/or Adjustment of Global Warrants.

               At such time as all beneficial interests in a particular Global
Warrant have been exercised or exchanged for Definitive Warrants or a particular
Global Warrant has been exercised, redeemed, repurchased or canceled in whole
and not in part, each such Global Warrant shall be returned to or retained and
canceled by the Warrant Agent in accordance with Section 3.8 hereof. At any time
prior to such cancellation, if any beneficial interest in a Global Warrant is
exercised or exchanged for or transferred to a Person who will take delivery
thereof in the form of a beneficial interest in another Global Warrant or for
Definitive Warrants, the amount of Warrants represented by such Global Warrant
shall be reduced accordingly and an endorsement shall be made on such Global
Warrant by the Warrant Agent or by the Depositary at the direction of the
Warrant Agent to reflect such reduction; and if the beneficial interest is being
exchanged for or transferred to a Person who will take delivery thereof in the
form of a beneficial interest in another Global Warrant, such other Global
Warrant shall be increased accordingly and an endorsement shall be made on such
Global Warrant by the Warrant Agent or by the Depositary at the direction of the
Warrant Agent to reflect such increase.

                      (i) General Provisions Relating to Transfers and
Exchanges.

                         (i) To permit registrations of transfers and exchanges,
                    the Company shall execute Global Warrants and Definitive
                    Warrants at the Warrant Registrar's request. The Warrant
                    Agent shall countersign Global Warrants and Definitive
                    Warrants in accordance with the provisions of Section 3.2
                    hereof.

                         (ii) No service charge shall be made to a holder of a
                    beneficial interest in a Global Warrant or to a holder of a
                    Definitive Warrant for any registration of transfer or
                    exchange, but the Company may require payment of a sum
                    sufficient to cover any transfer tax or similar governmental
                    charge payable in connection therewith (other than any such
                    transfer taxes or similar governmental charge payable upon
                    exchange or transfer pursuant to Section 8 hereof).

                         (iii) All Global Warrants and Definitive Warrants
                    issued upon any registration of transfer or exchange of
                    Global Warrants or Definitive Warrants shall be the duly
                    authorized, executed and issued warrants for Common Stock of
                    the Company, not subject to any preemptive rights, and
                    entitled to the same benefits under this Agreement, as the
                    Global Warrants or Definitive Warrants surrendered upon such
                    registration of transfer or exchange.

                         (iv) Prior to due presentment for the registration of a
                    transfer of any Warrant, the Warrant Agent, the Warrant
                    Registrar and the Company may deem and treat the Person in
                    whose name any Warrant is registered as the absolute owner
                    of such Warrant for all purposes and none of the Warrant
                    Agent, the Warrant Registrar or the Company shall be
                    affected by notice to the contrary.

                                       22

<PAGE>   26
                      (j) Facsimile Submissions to Warrant Agent.

               All certifications, certificates and Opinions of Counsel required
to be submitted to the Warrant Registrar pursuant to this Section 3.5 to effect
a registration of transfer or exchange may be submitted by facsimile.

               Notwithstanding anything herein to the contrary, as to any
certificates and/or certifications delivered to the Warrant Registrar pursuant
to this Section 3.5, the Warrant Registrar's duties shall be limited to
confirming that any such certifications and certificates delivered to it are in
the form of Exhibits B and C attached hereto. The Warrant Registrar shall not be
responsible for confirming the truth or accuracy of representations made in any
such certifications or certificates. As to any Opinions of Counsel delivered
pursuant to this Section 3.5, the Warrant Registrar may conclusively rely upon,
and be fully protected in relying upon, such Opinions.

                      3.6 REPLACEMENT WARRANTS.

                      In case any of the Warrant Certificates shall be
mutilated, lost, stolen or destroyed, the Company may in its discretion issue
and the Warrant Agent may countersign, in exchange and substitution for and upon
cancellation of the mutilated Warrant Certificate, or in lieu of and
substitution for the Warrant Certificate lost, stolen or destroyed, a new
Warrant Certificate of like tenor and representing an equivalent number of
Warrants, but only upon receipt of evidence reasonably satisfactory to the
Company and the Warrant Agent of such loss, theft or destruction of such Warrant
Certificate. If required by the Warrant Agent or the Company, an indemnity bond
must be supplied by the Holder that is sufficient in the judgment of the Warrant
Agent and the Company to protect the Company, the Warrant Agent, and any other
agent for purposes of the countersignature from any loss that any of them may
suffer if a Warrant is replaced. Applicants for such substitute Warrant
Certificates shall also comply with such other reasonable regulations and pay
such other reasonable charges as the Company and the Warrant Agent may
prescribe. The Company may charge for its expenses in replacing a Warrant.

                      Every replacement Warrant is an additional warrant of the
Company and shall be entitled to all of the benefits of this Warrant Agreement
equally and proportionately with all other Warrants duly issued hereunder.

                      3.7 TEMPORARY WARRANTS.

                      Until certificates representing Warrants are ready for
delivery, the Company may prepare and the Warrant Agent, upon receipt of a
Warrant Countersignature Order, shall issue temporary Warrants. Temporary
Warrants shall be substantially in the form of certificated Warrants but may
have variations that the Company considers appropriate for temporary Warrants
and as shall be reasonably acceptable to the Warrant Agent. Without unreasonable
delay, the Company shall prepare and the Warrant Agent shall countersign
definitive Warrants in exchange for temporary Warrants.

                      Holders of temporary Warrants shall be entitled to all of
the benefits of this Warrant Agreement.

                                       23

<PAGE>   27
                      3.8 CANCELLATION.

                      Subject to Section 3.5(h) hereof, the Company at any time
may deliver Warrants to the Warrant Agent for cancellation. The Warrant
Registrar shall forward to the Warrant Agent any Warrants surrendered to them
for registration of transfer, exchange or exercise. The Warrant Agent and no one
else shall cancel all Warrants surrendered for registration of transfer,
exchange, exercise, replacement or cancellation and shall return such canceled
Warrants to the Company (subject to the record retention requirement of the
Exchange Act). The Company may not issue new Warrants to replace Warrants that
have been exercised or that have been delivered to the Warrant Agent for
cancellation.

               SECTION 4. SEPARATION OF WARRANTS. Except as contemplated in
Section 7 of this Agreement, the Notes and Warrants shall not be separately
transferable prior to the Separation Date.

               SECTION 5. REGISTRATION AND COUNTERSIGNATURE. (a) The Warrant
Agent, on behalf of the Company, shall number and register the Warrant
Certificates in a register as they are issued by the Company.

                      (a) Warrant Certificates shall be manually countersigned
by the Warrant Agent and shall not be valid for any purpose unless so
countersigned.

                      (b) The Company and the Warrant Agent may deem and treat
the Holder(s) of the Warrant Certificates as the absolute owner(s) thereof
(notwithstanding any notation of ownership or other writing thereon made by
anyone), for all purposes, and neither the Company nor the Warrant Agent shall
be affected by any notice to the contrary. Prior to the Separation Date, DTC
shall be deemed the registered Holder of such Warrants for all purposes
hereunder.

               SECTION 6. TERMS OF WARRANTS; EXERCISE OF WARRANTS. (a) Subject
to the terms of this Agreement, each Holder shall have the right, which may be
exercised commencing at the opening of business on the Exercise Date and until
5:00 p.m., New York City time on the Expiration Date to receive from the Company
the number of fully paid and nonassessable Warrant Shares which the Holder may
at the time be entitled to receive on exercise of such Warrants and payment of
the Exercise Price then in effect for such Warrant Shares; provided that no
Holder shall be entitled to exercise such Holder's Warrants at any time, unless,
at the time of exercise (A) (i) a registration statement under the Securities
Act relating to the Warrant Shares has been filed with, and declared effective
by, the Commission, and no stop order suspending the effectiveness of such
registration statement has been issued by the Commission or (ii) the issuance of
the Warrant Shares is permitted pursuant to an exemption from the registration
requirements of the Securities Act; (B) such Warrant Shares are qualified for
sale or exempt from qualification under the applicable securities laws of the
states in which the various holders of the Warrants or other Persons to whom it
is proposed that the Warrant Shares be issued on exercise of the Warrants
reside; and (C) a Black Out Period or Suspension Notice (as defined in the
Warrant Registration Rights Agreement) is not in effect. Each Warrant not
exercised prior to 5:00 p.m., New York City time, on the Expiration Date shall
become void

                                       24

<PAGE>   28
and all rights thereunder and all rights in respect thereof under this Agreement
shall cease as of such time. No adjustments as to dividends will be made upon
exercise of the Warrants.

               The Company shall give notice not less than 90, and not more than
120, days prior to the Expiration Date to the Holders of all then outstanding
Warrants to the effect that the Warrants will terminate and become void as of
the 5:00 p.m., New York City time on the Expiration Date. If the Company fails
to give such notice, the Warrants will not expire until 90 days after the
Company gives such notice, provided in no event will Holders be entitled to any
damages or other remedy for the Company's failure to give such notice other than
any such extension.

               In order to exercise all or any of the Warrants represented by a
Warrant Certificate, (i) in the case of Definitive Warrants, the Holder thereof
must surrender for exercise the Warrant Certificate to the Company at the office
of the Warrant Agent at its New York corporate trust office, (ii) in the case of
a book-entry interest in a Global Warrant, the exercising Participant whose name
appears on a securities position listing of the Depositary as the holder of such
book-entry interest must comply with the Applicable Procedures relating to the
exercise of such book-entry interest in such Global Warrant and (iii) in the
case of both Global Warrants and Definitive Warrants, the holder thereof or the
Participant, as applicable, must deliver to the Company at the office of the
Warrant Agent the form of election to purchase on the reverse thereof duly
filled in and signed, which signature shall be medallion guaranteed by an
institution which is a member of a Securities Transfer Association recognized
signature guarantee program, and upon payment to the Warrant Agent for the
account of the Company of the Exercise Price, which is set forth in the form of
Warrant Certificate as adjusted as herein provided, for the number of Warrant
Shares in respect of which such Warrants are then exercised. In addition, if the
Holder is exercising Warrants resold pursuant to Regulation S, (A) such Holder
must certify in writing (i) it is not a "U.S. person" within the meaning of Rule
902(k) of Regulation S under the Securities Act, (ii) the Warrants are not being
purchased or exercised on behalf of or for the account or benefit of a "U.S.
person," (iii) such Holder will resell such Warrants and securities delivered
upon exercise thereof only in accordance with the provisions of Rules 901
through 905 of Regulation S, pursuant to registration under the Securities Act
or pursuant to an available exemption from registration and (iv) such Holder
will not engage in hedging transactions with regard to the Warrants and the
shares issuable on exercise of such Warrants unless in compliance with the
Securities Act or (B) such Holder must give a written opinion of counsel to the
effect that the Warrants and the securities delivered upon exercise thereof have
been registered under the Securities Act or are exempt from registration
thereunder.

               Payment of the aggregate Exercise Price shall be made (i) in cash
by wire transfer or by certified or official bank check, payable to the order of
the Company in United States dollars or (ii) by a Cashless Exercise for any
share of Common Stock.

               When a Holder surrenders a Warrant Certificate representing more
than one Warrant in connection with an option to elect a Cashless Exercise, the
number of shares of Common Stock deliverable upon such Cashless Exercise shall
be equal to the number of shares of Common Stock issuable upon the exercise of
the Warrants that the Holder specifies are to be exercised pursuant to a
Cashless Exercise multiplied by the Cashless Exercise Ratio. The

                                       25

<PAGE>   29
exercise of Warrants by Holders of beneficial interest in Global Warrants shall
be effected only in accordance with this Agreement and the procedures of the
Depositary therefor.

               Subject to the provisions of Section 8 hereof, upon surrender of
Warrants and payment of the Exercise Price as provided above, the Warrant Agent
shall thereupon promptly notify the Company, and the Company shall or shall
cause its Transfer Agent (as defined) promptly to transfer to the Holder of such
Warrant Certificate a certificate or certificates for the appropriate number of
Warrant Shares or other securities or property (including any money) to which
the Holder is entitled, registered or otherwise placed in, or payable to the
order of, such name or names as may be directed in writing by the Holder, and
shall deliver such certificate or certificates representing the Warrant Shares
and any other securities or property (including any money) to the person or
persons entitled to receive the same, together with an amount in cash in lieu of
any fraction of a share as provided in Section 14 hereof. Any such certificate
or certificates representing the Warrant Shares shall be deemed to have been
issued and any person so designated to be named therein shall be deemed to have
become a Holder of record of such Warrant Shares as of the date of the surrender
of such Warrants and payment of the Exercise Price.

               The Warrants shall be exercisable commencing on the Exercise
Date, at the election of the Holders thereof, either in full or from time to
time in part. If less than all the Warrants represented by a Definitive Warrant
are exercised, such Definitive Warrant shall be surrendered and a new Definitive
Warrant of the same tenor and for the number of Warrants which were not
exercised shall be executed by the Company and delivered to the Warrant Agent
and the Warrant Agent shall countersign the new Definitive Warrant, registered
in such name or names as may be directed in writing by the Holder, and shall
deliver the new Definitive Warrant to the Person or Persons entitled to receive
the same. The Warrant Agent shall make such notations on the "Schedule of
Exchanges of Interests on the Global Warrants" to each Global Warrant as are
required to reflect any change in the number of Warrants represented by such
Global Warrant resulting from any exercise in accordance with the terms hereof.

               All Warrant Certificates surrendered upon exercise of Warrants
shall be canceled by the Warrant Agent. Such canceled Warrant Certificates shall
then be disposed of by the Warrant Agent in a manner satisfactory to the
Company. The Warrant Agent shall account promptly to the Company with respect to
Warrants exercised and concurrently pay to the Company all monies received by
the Warrant Agent for the purchase of the Warrant Shares through the exercise of
such Warrants. The Warrant Agent shall keep copies of this Agreement and any
notices given or received hereunder by or from the Company available for
inspection by the Holders during normal business hours at its office. The
Company shall supply the Warrant Agent from time to time with such numbers of
copies of this Agreement as the Warrant Agent may reasonably request.

               All certificates representing Warrant Shares issued in a
transaction exempt from registration under the Securities Act shall bear the
following legend (provided that if no legend is required none shall be placed on
the Warrant Shares):

               "THIS SECURITY MAY NOT BE OFFERED OR SOLD IN THE UNITED STATES
ABSENT REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS

                                       26

<PAGE>   30
AMENDED, AND ANY APPLICABLE STATE SECURITIES LAWS OR AN APPLICABLE EXEMPTION
FROM REGISTRATION REQUIREMENTS."

                      (b) Notwithstanding any other provision of this Agreement
to the contrary, to the extent Qualcomm or any of its Affiliates is a Holder of
any of the Warrants, neither Qualcomm nor any of its Affiliates may exercise any
Warrants in a manner that would (i) preclude the Company from qualifying as a
"Publicly Traded Corporation With Widely Disbursed Voting Power" (a "PTC") under
47 CFR 24.720(m) as a result of the Company not satisfying the provisions of 47
CFR 24.720(m)(2) (which restriction on exercise shall only be applicable so long
as the Company is seeking to acquire, acquires and/or holds, directly or
indirectly, C-Block and F-Block broadband PCS licenses on the basis of
qualifying as a PTC), or (ii) cause any change in the Company's status as a
"very small business" designated entity as defined by the rules and regulations
of the FCC (to the extent the Company thereupon would not be qualified to hold
or acquire, directly or indirectly, C-Block and F-Block broadband PCS licenses
as to which it is or would be, directly or indirectly, the licensee), and any
such exercise shall be invalid ab initio to the extent such exercise would
preclude such qualification or cause any such change; provided, however, that in
the event the rules and regulations of the FCC should later be changed (or a
waiver of any such rules and regulations is obtained) to permit exercise of any
rights otherwise restricted as described above, Qualcomm or such Affiliate shall
then be entitled to exercise such additional rights. In determining whether any
exercise of Warrants held by Qualcomm or any of its Affiliates would preclude
the qualification referred to in clause (i) or cause any change referred to in
clause (ii) of this Subparagraph (b), the calculations with respect to
Qualcomm's or such Affiliate's beneficial ownership in the Company will include
all shares of the Company's equity securities held by or which after the date of
this Agreement are acquired by (whether by gift, purchase, pursuant to stock
options, warrants or convertible securities, or otherwise acquired by or
received by in any manner) any officers or directors of Qualcomm or any such
Affiliate.

               SECTION 7. MANDATORY DISPOSITION OR REDEMPTION PURSUANT TO FCC
REGULATIONS. If at any time a Holder beneficially owns more than the Permitted
Maximum Percentage of the total outstanding equity securities of the Company
(including all options, warrants and other securities convertible into equity
securities) then:

                         (i) If such event occurs prior to the Separation Date,
                    the Designated Warrants shall become immediately separable
                    from the Senior Notes or Senior Discount Notes, as the case
                    may be; and

                         (ii) The Company may, at its option:

                                    (a) require such Holder to dispose of the
                      Designated Warrants within 30 days of receipt of notice of
                      the Company's election or such date as may be requested or
                      required by the FCC; or

                                    (b) redeem the Designated Warrants within 30
                      days or such earlier date as may be requested or required
                      by the FCC at a redemption price equal to the product of
                      (1) the number of shares of Common Stock for which the
                      Designated Warrants are exercisable as of the date of
                      redemption and (2) an amount equal to the excess of the

                                       27

<PAGE>   31
                      Current Market Value per share of Common Stock on the
                      redemption date over the Exercise Price per share as of
                      the redemption date.

               In calculating Qualcomm's or any of its Affiliate's beneficial
ownership of equity securities of the Company for purposes of this Section 7,
such calculations will include all shares of the Company's equity securities
held by or which after the date of this Agreement are acquired by (whether by
gift, purchase, pursuant to stock options, warrants or convertible securities,
or otherwise acquired by or received by in any manner) any officers or directors
of Qualcomm or any such Affiliate.

               SECTION 8. PAYMENT OF TAXES. The Company shall pay all
documentary stamp taxes attributable (a) to the initial issuance of Warrant
Shares upon the exercise of Warrants or (b) to any Separation Date; provided
that, in each case, the Company shall not be required to pay any tax or taxes
which may be payable in respect of any transfer involved in the issue of any
Warrant Certificates or any certificates for Warrant Shares in a name other than
that of the Holder of a Warrant Certificate surrendered upon the exercise of a
Warrant, and the Company shall not be required to issue or deliver such Warrant
Certificates unless or until the person or persons requesting the issuance
thereof shall have paid to the Company the amount of such tax or shall have
established to the satisfaction of the Company that such tax has been paid.

               SECTION 9. RESERVATION OF WARRANT SHARES.

                      (a) The Company shall at all times reserve and keep
available, free from preemptive rights, out of the aggregate of its authorized
but unissued Common Stock or its authorized and issued Common Stock held in its
treasury, for the purpose of enabling it to satisfy any obligation to issue
Warrant Shares upon exercise of Warrants, the maximum number of shares of Common
Stock which may then be deliverable upon the exercise of all outstanding
Warrants.

                      (b) The Company will be irrevocably authorized and
directed at all times to reserve such number of authorized shares of Common
Stock as shall be required for issuance upon exercise of the Warrants.

                      (c) Before taking any action which would cause an
adjustment pursuant to Sections 11 or 13 hereof to reduce the Exercise Price
below the then par value (if any) of the Warrant Shares, the Company will take
any corporate action which may, in the opinion of its counsel (which may be
counsel employed by the Company), be necessary in order that the Company may
validly and legally issue fully paid and nonassessable Warrant Shares at the
Exercise Price as so adjusted.

                      (d) The Company covenants that all Warrant Shares which
may be issued upon exercise of Warrants in accordance with the terms of this
Agreement (including the terms of the Exercise Price) will, after receipt of the
Exercise Price and upon issue, be duly and validly issued, fully paid and
nonassessable, free of preemptive rights and free from all taxes, liens, charges
and security interests created by or through the Company.

                                       28

<PAGE>   32
               SECTION 10. OBTAINING STOCK EXCHANGE LISTINGS. The Company will
from time to time take all action which may be necessary so that the Warrant
Shares, immediately upon their issuance upon the exercise of Warrants, will be
listed on the principal securities exchanges and markets (including, without
limitation, the Nasdaq Stock Market) within the United States of America, if
any, on which other shares of Common Stock are then listed. Upon the listing of
such Warrant Shares, the Company shall notify the Warrant Agent in writing. The
Company will obtain and keep all required permits and records in connection with
such listing.

               SECTION 11. ADJUSTMENT OF EXERCISE PRICE AND NUMBER OF WARRANT
SHARES ISSUABLE. The number and kind of shares purchasable upon the exercise of
Warrants and the Exercise Price shall be subject to adjustment from time to time
as follows:

                      (a) Stock Splits, Combinations, etc. In case the Company
shall hereafter (A) pay a dividend or make a distribution on its Common Stock in
shares of its capital stock (whether shares of Common Stock or of capital stock
of any other class), (B) subdivide its outstanding shares of Common Stock, (C)
combine its outstanding shares of Common Stock into a smaller number of shares
or (D) issue by reclassification of its shares of Common Stock any shares of
capital stock of the Company, the Exercise Price in effect immediately prior to
such action shall be adjusted so that the Holder of any Warrant thereafter
exercised shall be entitled to receive upon payment of the Exercise Price the
number of shares of capital stock of the Company which such Holder would have
owned immediately following such action had such Warrant been exercised
immediately prior thereto. An adjustment made pursuant to this paragraph shall
become effective immediately after the record date in the case of a dividend and
shall become effective immediately after the effective date in the case of a
subdivision, combination or reclassification. If, as a result of an adjustment
made pursuant to this paragraph, the Holder of any Warrant thereafter exercised
shall become entitled to receive shares of two or more classes of capital stock
of the Company, the Board of Directors of the Company (whose determination shall
be conclusive) shall determine the allocation of the adjusted Exercise Price
between or among shares of such classes of capital stock.

                      (b) Reclassification, Combinations, Mergers, etc. Except
as provided in Section 11(e) in case of any reclassification or change of
outstanding shares of Common Stock issuable upon exercise of the Warrants (other
than as set forth in paragraph (a) above and other than a change in par value,
or from par value to no par value, or from no par value to par value or as a
result of a subdivision or combination), or in case of any consolidation or
merger of the Company with or into another corporation (other than a merger in
which the Company is the continuing corporation and which does not result in any
reclassification or change of the then outstanding shares of Common Stock or
other capital stock issuable upon exercise of the Warrants) or in case of any
sale or conveyance to another corporation of the assets of the Company as an
entirety or substantially as an entirety, then, as a condition of such
reclassification, change, consolidation, merger, sale or conveyance, the Company
or such a successor or purchasing corporation, as the case may be, shall
forthwith make lawful and adequate provision whereby the Holder of such Warrant
then outstanding shall have the right thereafter to receive on exercise of such
Warrant the kind and amount of shares of stock or other securities or property
receivable upon such reclassification, change, consolidation, merger, sale or
conveyance by a Holder of the number of shares of Common Stock issuable upon
exercise of such Warrant immediately prior to such reclassification, change,
consolidation, merger, sale or

                                       29

<PAGE>   33
conveyance and enter into a supplemental warrant agreement so providing. Such
provisions shall include provision for adjustments which shall be as nearly
equivalent as may be practicable to the adjustments provided for in this Section
11. If the issuer of securities deliverable upon exercise of Warrants under the
supplemental warrant agreement is an Affiliate of the formed, surviving or
transferee corporation, that issuer shall join in the supplemental warrant
agreement. The above provisions of this paragraph (b) shall similarly apply to
successive reclassifications and changes of shares of Common Stock and to
successive consolidations, mergers, sales or conveyances.

                      (c) Issuance of Options or Convertible Securities. In the
event that both (x) the Company shall, at any time or from time to time after
the date hereof, issue, sell, distribute or otherwise grant in any manner
(including by assumption) to all holders of the Common Stock any rights to
subscribe for or to purchase, or any warrants or options for the purchase of,
Common Stock or any stock or securities convertible into or exchangeable for
Common Stock (any rights, warrants or options being herein called "OPTIONS" and
any convertible or exchangeable stock or securities being herein called
"CONVERTIBLE SECURITIES") or any Convertible Securities (other than upon
exercise of any Option), whether or not such Options or the rights to convert or
exchange such Convertible Securities are immediately exercisable, and (y) the
price per share at which Common Stock is issuable upon the exercise of such
Options or upon the conversion or exchange of such Convertible Securities
(determined by dividing (i) the aggregate amount, if any, received or receivable
by the Company as consideration for the issuance, sale, distribution or granting
of such Options or any such Convertible Security, plus the minimum aggregate
amount of additional consideration, if any, payable to the Company upon the
exercise of all such Options or upon conversion or exchange of all such
Convertible Securities, plus, in the case of Options to acquire Convertible
Securities, the minimum aggregate amount of additional consideration, if any,
payable upon the conversion or exchange of all such Convertible Securities, by
(ii) the total maximum number of shares of Common Stock issuable upon the
exercise of all such Options or upon the conversion or exchange of all such
Convertible Securities or upon the conversion or exchange of all Convertible
Securities issuable upon the exercise of all such Options) shall be less than
the current market price per share of Common Stock on the record date for the
issuance, sale, distribution or granting of such Options or Convertible
Securities (any such event being herein called a "DISTRIBUTION"), then,
effective upon such Distribution, (I) the Exercise Price shall be reduced to the
price (calculated to the nearest 1/1,000 of one cent) determined by multiplying
the Exercise Price in effect immediately prior to such Distribution by a
fraction, the numerator of which shall be the sum of (1) the number of shares of
Common Stock outstanding immediately prior to such Distribution multiplied by
the current market price per share of Common Stock on the date of such
Distribution plus (2) the consideration, if any, received by the Company upon
such Distribution plus consideration to be received by the Company upon the
exercise, conversion or exchange of such Options or Convertible Securities, if
any, and the denominator of which shall be the product of (A) the total number
of shares of Common Stock outstanding immediately after such Distribution
multiplied by (B) the current market price per share of Common Stock on the
record date for such Distribution and (II) the number of shares of Common Stock
purchasable upon the exercise of each Warrant shall be increased to a number
determined by multiplying the number of shares of Common Stock so purchasable
immediately prior to the record date for such Distribution by a fraction, the
numerator of which shall be the Exercise Price in effect immediately prior to
the adjustment required by clause (I) of this

                                       30

<PAGE>   34
sentence and the denominator of which shall be the Exercise Price in effect
immediately after such adjustment (for the purposes of this clause (ii) without
giving effect to the provisions of Section 11(j)). For purposes of the
foregoing, the total maximum number of shares of Common Stock issuable upon
exercise of all such Options or upon conversion or exchange of all such
Convertible Securities or upon the conversion or exchange of the total maximum
amount of the Convertible Securities issuable upon the exercise of all such
Options shall be deemed to have been issued as of the date of such Distribution
and thereafter shall be deemed to be outstanding and the Company shall be deemed
to have received as consideration therefor such price per share, determined as
provided above. No adjustment to the number of Warrant Shares issuable upon the
exercise of the Warrants or to the Exercise Price shall be made, however, as a
result of (i) the issuance of shares of Common Stock under any Options or upon
the exercise, conversion or exchange of Options or Convertible Securities (or
upon the conversion of Qualcomm Trust Convertible Preferred Securities) existing
on the date hereof including warrants issued to Qualcomm or issued pursuant
hereto, (ii) the issuance of shares of Common Stock or warrants or Convertible
Securities in bona fide public or private offerings (including in connection
with Rule 145 transactions) or (iii) the issuance of Options or shares of Common
Stock pursuant to any Option, under any employee benefit plans approved by the
Board of Directors. Such adjustments shall be made whenever such rights, options
or warrants or convertible securities are issued. Except as provided in
paragraphs (1) and (m) below, no additional adjustment of the Exercise Price
shall be made upon the actual exercise of such Options or upon conversion or
exchange of the Convertible Securities or upon the conversion or exchange of the
Convertible Securities issuable upon the exercise of such Options.

                      (d) Other Issuances of Common Stock, Options or
Convertible Securities. Upon any issuance of Common Stock, Options or
Convertible Securities as to which paragraphs (a), (b) and (c) above are not
applicable, in the event that at any time or from time to time the Company shall
issue (i) shares of Common Stock (subject to the provisions below), (ii) Options
(provided, however, that no adjustment shall be made upon the exercise of such
Options) or (iii) Convertible Securities (provided, however, that no adjustment
shall be made upon the conversion, exchange or exercise of such securities
(other than issuances specified in (i), (ii) or (iii) which are made as the
result of antidilution adjustments in such securities)), at a price per share at
the record date of such issuance that is less than the then current market price
per share of Common Stock, then the number of shares of Common Stock issuable
upon the exercise of each Warrant shall be increased to a number determined by
multiplying the number of shares of Common Stock theretofore issuable upon
exercise of each Warrant by a fraction, the numerator of which shall be the
number of shares of Common Stock outstanding immediately after such sale or
issuance plus the number of additional shares of Common Stock offered for
subscription or purchase or into or for which such securities that are issued
are convertible, exchangeable or exercisable, and the denominator of which shall
be the number of shares of Common Stock outstanding immediately prior to such
sale or issuance plus the total number of shares of Common Stock which the
aggregate consideration expected to be received by the Company (assuming the
exercise or conversion of all such Options or Convertible Securities, if any)
would purchase at the then current market price per share of Common Stock, and
subject to paragraph (j) below, the Exercise Price shall be adjusted to a number
determined by dividing the Exercise Price immediately prior to such date of
issuance by the aforementioned fraction; provided, however, that no adjustment
to the number of Warrant Shares issuable upon the exercise of the Warrants or to
the Exercise Price shall be made as a result of (i) the issuance of

                                       31

<PAGE>   35
shares of Common Stock under any Options existing on the date hereof , including
warrants previously issued to Qualcomm, or issued pursuant hereto or upon the
conversion or exchange of any Convertible Securities (or upon the conversion of
Qualcomm Trust Convertible Preferred Securities), (ii) the issuance of shares of
Common Stock or warrants or Convertible Securities in bona fide public or
private offerings (including in connection with Rule 145 transactions) or (iii)
the issuance of Options or shares of Common Stock pursuant to any Option, under
any employee benefit plans approved by the Board of Directors. Such adjustments
shall be made whenever such rights, options or warrants or convertible
securities are issued. No adjustment shall be made pursuant to this paragraph
(d) which shall have the effect of decreasing the number of shares of Common
Stock issuable upon exercise of each warrant or of increasing the Exercise
Price, except by operation of paragraph (1) below. For purposes of paragraph (c)
hereof and this paragraph (d) only, any issuance of Common Stock, Options or
Convertible Securities, which issuance (or agreement to issue) (A) is in
exchange for or otherwise in connection with the bona fide acquisition of
property or assets of any kind (excluding any such exchange exclusively for
cash) of any Person and (B) is at a price per share determined by the Board of
Directors to be equal to the fair market value thereof at the time an agreement
in principle is reached or at the time a definitive agreement is entered into,
shall be deemed to have been made at a price per share equal to the current
market price per share at the record date with respect to such issuance (the
time of closing or consummation of such exchange or acquisition) if such
definitive agreement is entered into within 90 days of the date of such
agreement in principle. The consideration the Company receives in any public or
private offering shall be deemed to include the amount of fees, discounts and
commissions paid to underwriters, agents and financial advisors.

                      (e) Combination; Liquidation. In the event of (A) a
consolidation or merger of the Company or a sale of all or substantially all of
the assets of the Company where consideration to the holders of Common Stock in
exchange for their shares is payable solely in cash or (B) the dissolution,
liquidation or winding-up of the Company, Holders shall be entitled to receive,
upon surrender of their Warrant Certificates, distributions on an equal basis
with the holders of Common Stock or other securities, issuable upon exercise of
the Warrants, as if the Warrants had been exercised immediately prior to such
event, less the Exercise Price. Upon receipt of such payment, if any, the
Warrants will expire and the rights of the Holders will cease. In case of any
combination described in this paragraph (e), the surviving or acquiring Person
and, in the event of any dissolution, liquidation or winding-up of the Company,
the Company shall deposit promptly with the Warrant Agent the funds, if any,
necessary to pay to the holders of the Warrant the amounts to which they are
entitled as described above. After such funds and the surrendered Warrant
Certificates are received, the Warrant Agent is required to deliver a check in
such amount as is appropriate (or, in the case of consideration other than cash,
such other consideration as is appropriate) to such Person or Persons as it may
be directed in writing by the Holders surrendering such Warrants.

                      (f) Dividends and Distributions. In the event the Company
shall, at any time or from time to time after the date hereof, distribute to all
the holders of Common Stock any dividend or other distribution of cash,
evidences of its indebtedness, other securities or other properties or assets
(in each case other than (i) dividends payable in Common Stock, Options or
Convertible Securities and (ii) any cash dividend and other cash distribution
from current or retained earnings, or any options, warrants or other rights to
subscribe for or purchase any of the

                                       32

<PAGE>   36
foregoing), then (A) the Exercise Price shall be decreased to a price determined
by multiplying the Exercise Price then in effect by a fraction, the numerator of
which shall be the current market price per share of Common Stock on the record
date for such distribution less the sum of (X) the cash portion, if any, of such
distribution per share of Common Stock outstanding (exclusive of any treasury
shares) on the record date for such distribution plus (Y) the then fair market
value (as determined in good faith by the Board of Directors of the Company) per
share of Common Stock outstanding (exclusive of any treasury shares) on the
record date for such distribution of that portion, if any, of such distribution
consisting of evidences of indebtedness, other securities, properties, assets,
options, warrants or subscription or purchase rights, and the denominator of
which shall be such current market price per share of Common Stock and (B) the
number of shares of Common Stock purchasable upon the exercise of each Warrant
shall be increased to a number determined by multiplying the number of shares of
Common Stock so purchasable immediately prior to the record date for such
distribution by a fraction, the numerator of which shall be the Exercise Price
in effect immediately prior to the adjustment required by clause (A) of this
sentence and the denominator of which shall be the Exercise Price in effect
immediately after such adjustment (for the purposes of this clause (B) without
giving effect to the provisions of Section 11(j)). The adjustments required by
this paragraph (f) shall be made whenever any such distribution occurs
retroactive to the record date for the determination of stockholders entitled to
receive such distribution.

                      (g) Current Market Price. For the purpose of any
computation of current market price under this Section 11, Section 13 and
Section 14, the current market price per share of Common Stock at any date shall
be (x) for purposes of Section 13, the closing price on the business day
immediately prior to the exercise of the applicable Warrant pursuant to Section
6 and (y) in all other cases, the average of the daily closing prices for the
shorter of (i) the 20 consecutive trading days ending on the last full trading
day on the exchange or market specified in the second succeeding sentence prior
to the Time of Determination (as defined below) and (ii) the period commencing
on the date next succeeding the first public announcement of the issuance, sale,
distribution or granting in question through such last full trading day prior to
the Time of Determination. The term "TIME OF DETERMINATION" as used herein shall
be the time and date of the earlier to occur of (A) the date as of which the
current market price is to be computed and (B) the last full trading day on such
exchange or market before the commencement of "ex-dividend" trading in the
Common Stock relating to the event giving rise to the adjustment required by
paragraph (a), (b), (c), (d), (e) or (f). The closing price for any day shall be
the last reported sale price regular way or, in case no such reported sale takes
place on such day, the average of the closing bid and asked prices regular way
for such day, in each case (1) on the principal national securities exchange on
which the shares of Common Stock are listed or to which such shares are admitted
to trading or (2) if the Common Stock is not listed or admitted to trading on a
national securities exchange, in the over-the-counter market as reported by
Nasdaq National Market or any comparable system or (3) if the Common Stock is
not listed on Nasdaq National Market or a comparable system, as furnished by two
members of the NASD selected from time to time in good faith by the Board of
Directors of the Company for that purpose. In the absence of all of the
foregoing, or if for any other reason the current market price per share cannot
be determined pursuant to the foregoing provisions of this paragraph (g), the
current market price per share shall be the fair market value thereof as
determined in good faith by the Board of Directors of the Company.

                                       33

<PAGE>   37
                      (h) Certain Distributions. If the Company shall pay a
dividend payable in Options or Convertible Securities or make any other
distribution payable in Options or Convertible Securities, then, for purposes of
paragraph (c) above, such Options or Convertible Securities shall be deemed to
have been issued or sold without consideration.

                      (i) Consideration Received. If any shares of Common Stock,
Options or Convertible Securities shall be issued, sold or distributed for
consideration other than cash, the amount of the consideration other than cash
received by the Company in respect thereof shall be deemed to be the then
current market price of such consideration (as determined in good faith by the
Board of Directors of the Company). If any Options shall be issued in connection
with the issuance and sale of other securities of the Company, together
comprising one integral transaction in which no specific consideration is
allocated to such Options by the parties thereto, such Options shall be deemed
to have been issued without consideration; provided, that if such Options have
an exercise price equal to or greater than the fair market value of the Common
Stock on the date of issuance of such Options, then such Options shall be deemed
to have been issued for consideration equal to such exercise price.

                      (j) Deferral of Certain Adjustments. No adjustment to the
Exercise Price (including the related adjustment to the number of shares of
Common Stock purchasable upon the exercise of each Warrant) shall be required
hereunder unless such adjustment, together with other adjustments carried
forward as provided below, would result in an increase or decrease of at least
one percent of the Exercise Price; provided that any adjustments which by reason
of this paragraph (j) are not required to be made shall be carried forward and
taken into account in any subsequent adjustment. No adjustment need be made for
a change in the par value of the Common Stock. All calculations under this
Section shall be made to the nearest 1/1,000 of one cent or to the nearest
1/1,000 of a share, as the case may be.

                      (k) Changes in Options and Convertible Securities. If the
exercise price provided for in any Options referred to in paragraphs (c) and (d)
above is adjusted, the additional consideration, if any, payable upon the
conversion or exchange of any Convertible Securities referred to in paragraphs
(c) and (d) above, or the rate at which any Convertible Securities referred to
in paragraphs (c) and (d) above are convertible into or exchangeable for Common
Stock shall change at any time (other than under or by reason of provisions
designed to protect against dilution upon an event which results in a related
adjustment pursuant to this Section 11), the Exercise Price then in effect and
the number of shares of Common Stock purchasable upon the exercise of each
Warrant shall forthwith be readjusted (effective only with respect to any
exercise of any Warrant after such readjustment) to the Exercise Price and
number of shares of Common Stock so purchasable that would then be in effect had
the adjustment made upon the issuance, sale, distribution or granting of such
Options or Convertible Securities been made based upon such changed purchase
price, additional consideration or conversion rate, as the case may be, but only
with respect to such Options and Convertible Securities as then remain
outstanding.

                      (l) Expiration of Options and Convertible Securities. If,
at any time after any adjustment to the number of shares of Common Stock
purchasable upon the exercise of each Warrant shall have been made pursuant to
paragraph (c), (d) or (k) above or this paragraph (1), any Options or
Convertible Securities shall have expired unexercised, the number of such

                                       34

<PAGE>   38
shares purchasable upon the exercise of each Warrant shall, upon such
expiration, be readjusted and shall thereafter be such as they would have been
had they been originally adjusted (or had the original adjustment not been
required, as the case may be) as if (i) the only shares of Common Stock deemed
to have been issued in connection with such Options or Convertible Securities
were the shares of Common Stock, if any, actually issued or sold upon the
exercise of such Options or Convertible Securities and (ii) such shares of
Common Stock, if any, were issued or sold for the consideration actually
received by the Company upon such exercise plus the aggregate consideration, if
any, actually received by the Company for the issuance, sale, distribution or
granting of all such Options or Convertible Securities, whether or not
exercised; provided that no such readjustment shall have the effect of
decreasing the number of such shares so purchasable by an amount (calculated by
adjusting such decrease to account for all other adjustments made pursuant to
this Section 11 following the date of the original adjustment referred to above)
in excess of the amount of the adjustment initially made in respect of the
issuance, sale, distribution or granting of such Options or Convertible
Securities.

                      (m) Other Adjustments. In the event that at any time, as a
result of an adjustment made pursuant to this Section 11, the Holders shall
become entitled to receive any securities of the Company other than shares of
Common Stock, thereafter the number of such other securities so receivable upon
exercise of the Warrants and the Exercise Price applicable to such exercise
shall be subject to adjustment from time to time in a manner and on terms as
nearly equivalent as practicable to the provisions with respect to the shares of
Common Stock contained in this Section 11.

                      (n) Adjustment in Number of Shares. Upon each adjustment
of the Exercise Price pursuant to this Section 11 or upon the occurrence of any
event or action which would require an adjustment of the Exercise Price pursuant
to this Section 11 but for Section 11(j), each Warrant outstanding prior to the
making of the adjustment in the Exercise Price shall thereafter evidence the
right to receive upon payment of the adjusted Exercise Price that number of
shares of Common Stock obtained by multiplying the number of Warrant Shares so
purchasable upon exercise of a Warrant by payment of the Exercise Price in
effect immediately prior to adjustment by a fraction, the numerator of which is
the Exercise Price in effect immediately prior to the adjustment and the
denominator of which shall be the adjusted Exercise Price (without giving effect
to the provisions of Section 11(j)).

               SECTION 12. STATEMENT ON WARRANTS. Irrespective of any adjustment
in the number or kind of shares issuable upon the exercise of the Warrants,
Warrants theretofore or thereafter issued may continue to express the same price
and number and kind of shares as are stated in the Warrants initially issuable
pursuant to this Agreement.

               SECTION 13. NO DILUTION OR IMPAIRMENT; CAPITAL AND OWNERSHIP
STRUCTURE. The Company will not, by amendment of its certificate of
incorporation or through any consolidation, merger, reorganization, transfer of
assets, dissolution, issue or sale of securities or any other voluntary action,
avoid or seek to avoid the observance or performance of any of the terms of the
Warrants, but will at all times in good faith assist in the carrying out of all
such terms and in the taking of all such action as may be reasonably necessary
or appropriate in order to protect the rights of the Holders under this
Agreement. Without limiting the generality of the foregoing, the Company (a)
will take all such action as may be reasonably necessary or

                                       35

<PAGE>   39
appropriate in order that the Company may validly and legally issue fully paid
and nonassessable shares of Common Stock on the exercise of the Warrants from
time to time outstanding and (b) will not take any action which results in any
adjustment of the Exercise Price if the total number of Warrant Shares issuable
after the action upon the exercise of all of the Warrants would exceed the total
number of shares of Common Stock then authorized by the Company's certificate of
incorporation and available for the purposes of issue upon such exercise. A
consolidation, merger, reorganization or transfer of assets involving the
Company covered by Section 11(b) or 11(e) shall not be prohibited by or require
any adjustment under this Section 13.

               It is the intent of this Agreement to provide that, on and as of
the Closing Date, the number of Warrant Shares into which the Warrants are
exercisable represent 7.333% of the issued and outstanding shares of Common
Stock on a fully diluted basis. For purposes of this paragraph, the phrase "on a
fully diluted basis" shall include any and all options, warrants or other rights
to acquire common equity of the Company, whether or not exercisable on the
Closing Date but excluding all such options, warrants (other than the Warrants)
or other rights to acquire common equity at an exercise or conversion price
greater than the exercise price of the Warrants as of the Closing Date, as
adjusted. If either (i) the issuance of the Warrants causes the application of
the anti-dilution provisions of any of the Company's warrants, options or
convertible securities outstanding as of the Closing Date to result in an
increase in the number of shares of Common Stock issuable thereunder or (ii)
after the Closing Date the exercise price of the Company's then outstanding
warrants, options or convertible securities is adjusted to an exercise price
equal to or less than the Exercise Price of the Warrants, such additional shares
of Common Stock, or such shares of Common Stock issuable upon the exercise or
conversion of such warrants, options or convertible securities, as the case may
be, will be included in the calculation of the Common Stock on a fully diluted
basis, and the number of Warrant Shares issuable upon exercise of each Warrant
automatically shall be adjusted upward by an amount sufficient to bring the
total number of Warrant Shares issuable pursuant to the Warrant Agreement to a
number representing 7.333% of the then issued and outstanding shares of Common
Stock of the Company on a fully diluted basis.

               SECTION 14. FRACTIONAL INTEREST. The Company shall not be
required to issue fractional shares of Common Stock on the exercise of Warrants.
If more than one Warrant shall be presented for exercise in full at the same
time by the same Holder, the number of full shares of Common Stock which shall
be issuable upon such exercise shall be computed on the basis of the aggregate
number of shares of Common Stock acquirable on exercise of the Warrants so
presented. If any fraction of a share of Common Stock would, except for the
provisions of this Section, be issuable on the exercise of any Warrant (or
specified portion thereof), the Company shall direct the Transfer Agent to pay
an amount in cash calculated by it to equal the then current market price per
share multiplied by such fraction computed to the nearest whole cent less such
fraction of the Exercise Price. The Holders, by their acceptance of the Warrant
Certificates, expressly waive any and all rights to receive any fraction of a
share of Common Stock or a stock certificate representing a fraction of a share
of Common Stock.

               SECTION 15. NOTICES TO WARRANT HOLDERS; NO RIGHTS AS
SHAREHOLDERS. Upon any adjustment of the Exercise Price pursuant to Sections 11
or 13, the Company shall promptly thereafter (i) cause to be filed with the
Warrant Agent a certificate of a firm of independent public accountants of
nationally recognized standing selected by the Board of

                                       36

<PAGE>   40
Directors of the Company (who may be the regular auditors of the Company)
setting forth the Exercise Price after such adjustment and setting forth in
reasonable detail the method of calculation and the facts upon which such
calculations are based and setting forth the number of Warrant Shares (or
portion thereof) issuable after such adjustment in the Exercise Price, upon
exercise of a Warrant and payment of the adjusted Exercise Price, which
certificate shall be conclusive evidence of the correctness of the matters set
forth therein, and (ii) cause to be given to each of the registered Holders (or
the DTC Participants with interests in the Global Warrant) at his/her address
appearing on the Warrant register written notice of such adjustments by
first-class mail, postage prepaid. The Warrant Agent shall be entitled to rely
on the above-referenced accountant's certificate and shall be under no duty or
responsibility with respect to any such certificate, except to exhibit the same
from time to time to any Holder desiring an inspection thereof during reasonable
business hours. The Warrant Agent shall not at any time be under any duty or
responsibility to any Holder to determine whether any facts exist that may
require any adjustment of the number of shares of Common Stock or other stock or
property issuable on exercise of the Warrants or the Exercise Price, or with
respect to the nature or extent of any such adjustment when made, or with
respect to the method employed in making such adjustment or the validity or
value (or the kind or amount) of any shares of Common Stock or other stock or
property which may be issuable on exercise of the Warrants. The Warrant Agent
shall not be responsible for any failure of the Company to make any cash payment
or to issue, transfer or deliver any shares of Common Stock or stock
certificates or other common stock or property upon the exercise of any Warrant.

               In case:

                      (a) the Company shall authorize the issuance to all
holders of shares of Common Stock of rights, options or warrants to subscribe
for or purchase shares of Common Stock or of any other subscription rights or
warrants; or

                      (b) the Company shall authorize the distribution to all
holders of shares of Common Stock of evidences of its indebtedness or assets
(other than cash dividends or cash distributions payable out of consolidated
earnings or earned surplus or dividends payable in shares of Common Stock or
distributions referred to in Section 11 hereof); or

                      (c) of any consolidation or merger to which the Company is
a party and for which approval of any shareholders of the Company is required,
or of the conveyance or transfer of the properties and assets of the Company
substantially as an entirety, or of any reclassification or change of Common
Stock issuable upon exercise of the Warrants (other than a change in par value,
or from par value to no par value, or from no par value to par value, or as a
result of a subdivision or combination), or a tender offer or exchange offer for
shares of Common Stock; or

                      (d) of the voluntary or involuntary dissolution,
liquidation or winding up of the Company; or

                      (e) a Change of Control (as defined in the Indenture)
occurs; or

                                       37

<PAGE>   41
                      (f) the Company proposes to take any other action that
would require an adjustment of the Exercise Price or the number of Warrant
Shares pursuant to Sections 11 or 13;

then the Company shall cause to be filed with the Warrant Agent and shall cause
to be given to each of the registered Holders of the Warrant Certificates at
such Holder's address appearing on the Warrant register, at least 20 days (or 10
days in any case specified in clauses (a) or (b) above) prior to the applicable
record date hereinafter specified, or promptly in the case of events for which
there is no record date, by first class mail, postage prepaid, a written notice
stating (i) the date as of which the holders of record of shares of Common Stock
to be entitled to receive any such rights, options, warrants or distribution are
to be determined, or (ii) the initial expiration date set forth in any tender
offer or exchange offer for shares of Common Stock, or (iii) the date on which
any such consolidation, merger, conveyance, transfer, dissolution, liquidation
or winding up or Change of Control is expected to become effective or
consummated, and the date as of which it is expected that holders of record of
shares of Common Stock shall be entitled to exchange such shares for securities
or other property, if any, deliverable upon such reclassification,
consolidation, merger, conveyance, transfer, dissolution, liquidation or winding
up or Change of Control. The failure to give the notice required by this Section
15 or any defect therein shall not affect the legality or validity of any
distribution, right, option, warrant, consolidation, merger, conveyance,
transfer, dissolution, liquidation or winding up, or Change of Control or the
vote upon any action.

               Nothing contained in this Agreement or in any of the Warrant
Certificates shall be construed as conferring upon the Holders thereof the right
to vote or to consent or to receive notice as shareholders in respect of the
meetings of shareholders or the election of Directors of the Company or any
other matter, or any rights whatsoever as shareholders of the Company.

               SECTION 16. MERGER, CONSOLIDATION OR CHANGE OF NAME OF WARRANT
AGENT. Any corporation into which the Warrant Agent may be merged or with which
it may be consolidated, or any corporation resulting from any merger or
consolidation to which the Warrant Agent shall be a party, or any corporation
succeeding to the business of the Warrant Agent, shall be the successor to the
Warrant Agent hereunder without the execution or filing of any paper or any
further act on the part of any of the parties hereto, provided that such
corporation would be eligible for appointment as a successor warrant agent under
the provisions of Section 18. Any such successor Warrant Agent shall promptly
cause notice of its succession as Warrant Agent to be mailed (by first class
mail, postage prepaid) to each Holder at such Holder's last address as shown on
the register maintained by the Warrant Agent pursuant this Agreement. In case at
the time such successor to the Warrant Agent shall succeed to the agency created
by this Agreement, and in case at that time any of the Warrant Certificates
shall have been countersigned but not delivered, any such successor to the
Warrant Agent may adopt the countersignature of the original Warrant Agent; and
in case at that time any of the Warrant Certificates shall not have been
countersigned, any successor to the Warrant Agent may countersign such Warrant
Certificates either in the name of the predecessor Warrant Agent or in the name
of the successor to the Warrant Agent; and in all such cases such Warrant
Certificates shall have the full force and effect provided in the Warrant
Certificates and in this Agreement.

                                       38

<PAGE>   42
               In case at any time the name of the Warrant Agent shall be
changed and at such time any of the Warrant Certificates shall have been
countersigned but not delivered, the Warrant Agent whose name has been changed
may adopt the countersignature under its prior name, and in case at that time
any of the Warrant Certificates shall not have been countersigned, the Warrant
Agent may countersign such Warrant-Certificates either in its prior name or in
its changed name, and in all such cases such Warrant Certificates shall have the
full force and effect provided in the Warrant Certificates and in this
Agreement.

               SECTION 17. WARRANT AGENT. The Warrant Agent undertakes the
duties and obligations imposed by this Agreement upon the following terms and
conditions, by all of which the Company and the Holders of Warrants, by their
acceptance thereof, shall be bound:

                      (a) The statements contained herein and in the Warrant
Certificates shall be taken as statements of the Company and the Warrant Agent
assumes no responsibility for the correctness of any of the same except such as
describe the Warrant Agent or action taken or to be taken by it. The Warrant
Agent assumes no responsibility with respect to the distribution of the Warrant
Certificates except as otherwise provided by the express terms of this
Agreement.

                      (b) The Warrant Agent shall not be responsible for any
failure of the Company to comply with any of the covenants contained in this
Agreement or in the Warrant Certificates to be complied with by the Company.

                      (c) The Warrant Agent may consult at any time with counsel
of its own selection (who may be counsel for the Company) and the Warrant Agent
shall incur no liability or responsibility to the Company or to any Holder of
any Warrant Certificate in respect of any action taken, suffered or omitted by
it hereunder in good faith and in accordance with the opinion or the advice of
such counsel.

                      (d) Before the Warrant Agent acts or refrains from acting,
it may require an officer's certificate or an opinion of counsel, or both. The
Warrant Agent shall incur no liability or responsibility to the Company or to
any Holder of any Warrant Certificate for any action taken in reliance on any
Warrant Certificate, certificate of shares, notice, resolution, waiver, consent,
order, certificate, or other paper, document or instrument (whether in its
original or facsimile form) believed by it to be genuine and to have been
signed, sent or presented by the proper party or parties.

                      (e) The Company agrees to pay to the Warrant Agent such
compensation as shall be agreed upon from time to time in writing for all
services rendered by the Warrant Agent in the execution of this Agreement, to
reimburse the Warrant Agent for all expenses, taxes and governmental charges and
other charges of any kind and nature reasonably incurred by the Warrant Agent in
the execution of this Agreement and to indemnify the Warrant Agent and any
predecessor Warrant Agent and save it harmless against any and all liabilities,
claims, damages, losses and expenses (including taxes other than taxes based on
the income of the Warrant Agent) including judgments, reasonable costs and
counsel fees and expenses, for anything done or omitted by the Warrant Agent in
the execution of this Agreement or arising out of or in connection with its
performance of its obligations or duties under this Agreement, except

                                       39

<PAGE>   43
to the extent such liabilities are attributable to its gross negligence or
willful misconduct. The Warrant Agent shall notify the Company promptly of any
claim for which it may seek indemnity; provided that the failure by the Warrant
Agent to so notify the Company shall not relieve or reduce its obligations
hereunder except to the extent the failure to so notify the Company of any claim
of which a Responsible Officer of the Warrant Agent has actual knowledge
materially prejudices the Company. The Company shall defend the claim and the
Warrant Agent shall cooperate in the defense. The Warrant Agent may have
separate counsel and the Company shall pay the reasonable fees and expense of
such counsel. The Company need not pay for any settlement made without its
consent, which consent shall not be unreasonably withheld.

                      (f) The Warrant Agent shall be under no obligation to
institute any action, suit or legal proceeding or to take any other action
likely to involve expense unless the Company or one or more Holders of Warrant
Certificates shall furnish the Warrant Agent with security and indemnity
reasonably satisfactory to it for any costs and expenses which may be incurred,
but this provision shall not affect the power of the Warrant Agent to take such
action as is necessary, whether with or without any such security or indemnity.
All rights of action under this Agreement or under any of the Warrants may be
enforced by the Warrant Agent without the possession of any of the Warrant
Certificates or the production thereof at any trial or other proceeding relative
thereto, and any such action, suit or proceeding instituted by the Warrant Agent
shall be brought in its name as Warrant Agent and any recovery of judgment shall
be for the ratable benefit of the Holders of the Warrants, as their respective
rights or interests may appear.

                      (g) The Warrant Agent, and any stockholder, director,
officer or employee of it, may buy, sell or deal in any of the Warrants or other
securities of the Company or become pecuniarily interested in any transaction in
which the Company may be interested, or contract with or lend money to the
Company or otherwise act as fully and freely as though it were not Warrant Agent
under this Agreement. Nothing herein shall preclude the Warrant Agent from
acting in any other capacity for the Company or for any other legal entity.

                      (h) The Warrant Agent shall act hereunder solely as agent
for the Company, and its duties shall be determined solely by the provisions
hereof.

                      (i) The Warrant Agent shall not be liable for anything
which it may do or refrain from doing in connection with this Agreement except
for its own gross negligence or willful misconduct.

                      (j) The Warrant Agent shall not at any time be under any
duty or responsibility to any Holder of any Warrant Certificate to make or cause
to be made any adjustment of the Exercise Price or number of the Warrant Shares
or other securities or property deliverable as provided in this Agreement, or to
determine whether any facts exist which may require any of such adjustments, or
with respect to the nature or extent of any such adjustments, when made, or with
respect to the method employed in making the same. The Warrant Agent shall not
be accountable with respect to the validity or value or the kind or amount of
any Warrant Shares or of any securities or property which may at any time be
issued or delivered upon the exercise of any Warrant or with respect to whether
any such Warrant Shares or other

                                       40

<PAGE>   44
securities will when issued be validly issued and fully paid and nonassessable,
and makes no representation with respect thereto.

                      (k) The Warrant Agent undertakes to perform such duties
and only such-duties as are specifically set forth in this Agreement, and no
implied covenants or obligations shall be read into this Agreement against the
Warrant Agent.

                      (l) The Warrant Agent may conclusively rely, as to the
truth of the statements and the correctness of the opinions expressed therein,
upon certificates or opinions furnished to the Warrant Agent and conforming to
the requirements of this Agreement; but in the case of any such certificates or
opinions which by any provision hereof are specifically required to be furnished
to the Warrant Agent, the Warrant Agent shall be under a duty to examine the
same to determine whether or not they conform to the requirements of this
Agreement (but need not confirm or investigate the accuracy of mathematical
calculations or other facts stated therein).

                      (m) The Warrant Agent shall not be liable for any error of
judgment made in good faith by a Responsible Officer, unless it shall be proved
that the Warrant Agent was negligent in ascertaining the pertinent facts.

                      (n) The Warrant Agent shall not be liable with respect to
any action taken or omitted to be taken by it in good faith in accordance with
the direction of the Holders of a majority interest of Warrants relating to the
time, method and place of conducting any proceeding for any remedy available to
the Warrant Agent, or exercising any trust or power conferred upon the Warrant
Agent, under this Agreement with respect to the Units, Warrants or Notes, as
applicable.

                      (o) No provision of this Agreement shall require the
Warrant Agent to expend or risk its own funds or otherwise incur any financial
liability in the performance of any of its duties hereunder, or in the exercise
of any of its rights or powers, if it shall have reasonable grounds for
believing that repayment of such funds or adequate indemnity against such risk
or liability is not reasonably assured to it.

                      (p) Whether or not therein expressly so provided, every
provision of this Agreement relating to the conduct or affecting the liability
of or affording protection to the Warrant Agent shall be subject to the
provisions of this Section.

                      (q) The Warrant Agent may conclusively rely and shall be
protected in acting or refraining from acting upon any resolution, certificate,
statement, instrument, opinion, report, notice, request, direction, consent,
order, bond, debenture, note, other evidence of indebtedness or other paper or
document believed by it to be genuine and to have been signed or presented by
the proper party or parties.

                      (r) The Warrant Agent shall not be bound to make any
investigation into the facts or matters stated in any resolution, certificate,
statement, instrument, opinion, report, notice, request, direction, consent,
order, bond, debenture, note, other evidence of indebtedness or other paper or
document, but the Warrant Agent, in its discretion, may make such further
inquiry or investigation into such facts or matters as it may see fit, and, if
the

                                       41

<PAGE>   45
Warrant Agent shall determine to make such further inquiry or investigation, it
shall he entitled to, during reasonable business hours, examine the books,
records and premises of the Company, personally or by agent or attorney at the
sole cost of the Warrant Agent and shall incur no liability or additional
liability of any kind by any reason of such inquiry or investigation.

                      (s) The Warrant Agent may execute any of the trusts or
powers hereunder or perform any duties hereunder either directly or by or
through agents or attorneys and the Warrant Agent shall not be responsible for
any willful misconduct or gross negligence on the part of any agent or attorney
appointed with due care by it hereunder.

                      (t) The Warrant Agent shall not be liable for any action
taken, suffered, or omitted to be taken by it in good faith and reasonably
believed by it to be authorized or within the discretion or rights or powers
conferred upon it by this Agreement.

                      (u) The rights, privileges, protections, immunities and
benefits given to the Warrant Agent, including, without limitation, its right to
be indemnified, are extended to, and shall be enforceable by, the Warrant Agent
in each of its capacities hereunder, and to each agent, custodian and other
Person employed to act hereunder.

               SECTION 18. RESIGNATION AND REMOVAL OF WARRANT AGENT; APPOINTMENT
OF SUCCESSOR. No resignation or removal of the Warrant Agent and no appointment
of a successor warrant agent shall become effective until the acceptance of
appointment by the successor warrant agent as provided herein. The Warrant Agent
may resign its duties and be discharged from all further duties and liability
hereunder (except liability arising as a result of the Warrant Agent's own
negligence, willful misconduct or bad faith) after giving written notice to the
Company. The Company may remove the Warrant Agent upon written notice, and the
Warrant Agent shall thereupon in like manner be discharged from all further
duties and liabilities hereunder, except as aforesaid. The Warrant Agent shall,
at the Company's expense, cause to be mailed (by first class mail, postage
prepaid) to each Holder at his last address as shown on the register of the
Company maintained by the Warrant Registrar a copy of said notice of resignation
or notice of removal, as the case may be. Upon such resignation or removal, the
Company shall appoint in writing a successor warrant agent. If the Company shall
fail to make such appointment within a period of 30 days after it has been
notified in writing of such resignation by the resigning Warrant Agent or after
such removal, then the resigning Warrant Agent or the Holder of any Warrant may
at the expense of the Company apply to any court of competent jurisdiction for
the appointment of a new warrant agent. Any new warrant agent, whether appointed
by the Company or by such a court, shall be a corporation doing business under
the laws of the United States or any state thereof, in good standing and having
a combined capital and surplus of not less than $50,000,000. The combined
capital and surplus of any such new warrant agent shall be deemed to be the
combined capital and surplus as set forth in the most recent annual report of
its condition published by such warrant agent prior to its appointment, provided
that such reports are published at least annually pursuant to law or to the
requirements of a federal or state supervising or examining authority. After
acceptance in writing of such appointment by the new warrant agent, it shall be
vested with the same powers, rights, duties and responsibilities as if it had
been originally named herein as the Warrant Agent, without any further
assurance, conveyance, act or deed; but if for any reason it shall be necessary
or expedient to execute and deliver any further assurance, conveyance, act or
deed, the same shall

                                       42

<PAGE>   46
be done at the expense of the Company and shall be legally and validly executed
and delivered by the resigning or removed Warrant Agent. Not later than the
effective date of any such appointment, the Company shall give notice thereof to
the resigning or removed Warrant Agent. Failure to give any notice provided for
in this Section, however, or any defect therein, shall not affect the legality
or validity of the resignation of the Warrant Agent or the appointment of a new
warrant agent, as the case may be.

               SECTION 19. REGISTRATION. The Company and the Warrant Agent
acknowledge that Holders shall have the registration rights set forth in the
Warrant Registration Rights Agreement, a copy of which is attached hereto as
Exhibit D.

               SECTION 20. REPORTS. (a) So long as any of the Warrants remain
outstanding, and to the extent the Company is required to send such documents to
the holders of its outstanding Common Stock, the Company shall, upon request,
furnish to the registered Holders of the Warrants and to the beneficial Holders,
all quarterly and annual financial information that would be required to be
contained in a filing with the Commission on Forms 10-Q and 10-K if the Company
were required to file such Forms, including a "Management's Discussion and
Analysis of Financial Condition and Results of Operations" and, with respect to
the annual information only, a report thereon by the Company's certified
independent accountants; and (ii) all current reports that would be required to
be filed with the Commission on Form 8-K if the Company were required to file
such reports. In addition, whether or not required by the rules and regulations
of the Commission, the Company will file a copy of all such information and
reports with the Commission for public availability (unless the Commission will
not accept such a filing) and make such information available to securities
analysts and prospective investors upon request.

               Delivery of such reports, information and documents to the
Warrant Agent is for informational purposes only and the Warrant Agent's receipt
of such shall not constitute constructive notice of any information contained
therein or determinable from information contained therein, including the
Company's compliance with any of its covenants hereunder (as to which the
Warrant Agent is entitled to rely exclusively on Officers' Certificates).

                      (b) The Company shall provide the Warrant Agent with a
sufficient number of copies of all reports filed with the Commission pursuant to
clause (a) above that the Warrant Agent may be required to deliver to the
Holders of the Warrants under this Section 20.

               SECTION 21. RULE 144A AND RULE 144. The Company hereby agrees
with each Holder, for so long as any Registrable Securities remain outstanding,
and during any period in which the Company (i) is not subject to Section 13 or
15(d) of the Exchange Act, to make available, upon request of any Holder of
Registrable Securities, to such Holder or beneficial owner of Registrable
Securities, the information required by Rule 144A(d)(4) under the Securities Act
in order to permit resales of such Registrable Securities pursuant to Rule 144A,
and (ii) is subject to Section 13 or 15(d) of the Exchange Act, to make all
filings required thereby in a timely manner in order to permit resales of such
Registrable Securities pursuant to Rule 144.

               SECTION 22. NOTICES TO COMPANY AND WARRANT AGENT. Any notice or
demand authorized by this Agreement to be given or made by the Warrant Agent or
by the

                                       43

<PAGE>   47
Holder of any Warrant Certificate to or on the Company shall be sufficiently
given or made when and if deposited in the mail, first class or registered,
postage prepaid, addressed (until another address is filed in writing by the
Company with the Warrant Agent), as follows:

                        Leap Wireless International, Inc.
                        10307 Pacific Center Court
                        San Diego, CA  92121
                        Telecopier No.: (858) 882-6040
                        Attention:  General Counsel

               In case the Company shall fail to maintain such office or agency
or shall fail to give such notice of the location or of any change in the
location thereof, presentations may be made and notices and demands may be
served at the principal office of the Warrant Agent.

               Any notice pursuant to this Agreement to be given by the Company
or by the Holder(s) of any Warrant Certificate to the Warrant Agent shall be
sufficiently given when and if deposited in the mail, first-class or registered,
postage prepaid, addressed (until another address is filed in writing by the
Warrant Agent with the Company) to the Warrant Agent as follows:

                        State Street Bank and Trust Company
                        225 Asylum Street
                        Hartford, CT  06103
                        Attention: Michael M. Hopkins
                        Fax: (860) 244-1889

               SECTION 23. SUPPLEMENTS AND AMENDMENTS. The Company and the
Warrant Agent may from time to time supplement or amend this Agreement without
the approval of any Holders of Warrant Certificates in order to cure any
ambiguity or to correct or supplement any provision contained herein which may
be defective or inconsistent with any other provision herein, or to make any
other provisions in regard to matters or questions arising hereunder which the
Company and the Warrant Agent may deem necessary or desirable and which shall
not in any way materially adversely affect the interests of any Holder of
Warrant Certificates. Any amendment or supplement to this Agreement that has a
material adverse effect on the interests of Holders shall require the written
consent of Holders representing a majority of the then outstanding Warrants
(excluding Warrants held by the Company or any of its Affiliates). The consent
of each Holder affected shall be required for any amendment pursuant to which
the Exercise Price would be increased or the number of Warrant Shares
purchasable upon exercise of Warrants would be decreased (other than pursuant to
adjustments provided by this Agreement) or the Exercise Period with respect to
the Warrants would be shortened. The Warrant Agent shall be entitled to receive
and, subject to Section 19, shall be fully protected in relying upon, an
officers' certificate and opinion of counsel as conclusive evidence that any
such amendment or supplement is authorized or permitted hereunder, that it is
not inconsistent herewith, and that it will be valid and binding upon the
Company in accordance with its terms.

               SECTION 24. SUCCESSORS. All the covenants and provisions of this
Agreement by or for the benefit of the Company or the Warrant Agent shall bind
and inure to the benefit of their respective successors and assigns hereunder.

                                       44

<PAGE>   48
               SECTION 25. TERMINATION. This Agreement (other than the Company's
obligations with respect to Warrants previously exercised and with respect to
indemnification under Section 17) shall terminate on the earlier to occur of (i)
5:00 p.m., New York City time on the Expiration Date (ii) the date on which all
Warrants are exercised into Warrant Shares or (iii) the payment to Holders of
the distributions referred to in Section 11(e) upon surrender of their Warrant
Certificates.

               SECTION 26. GOVERNING LAW. THIS AGREEMENT AND EACH WARRANT
CERTIFICATE ISSUED HEREUNDER SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE
WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK WITHOUT GIVING EFFECT TO
CONFLICTS OF LAWS PRINCIPLES.

               SECTION 27. BENEFITS OF THIS AGREEMENT. (a) Nothing in this
Agreement shall be construed to give to any person or corporation other than the
Company, the Warrant Agent and the Holders of the Warrant Certificates any legal
or equitable right, remedy or claim under this Agreement; but this Agreement
shall be for the sole and exclusive benefit of the Company, the Warrant Agent
and the Holders of the Warrant Certificates.

                      (a) Prior to the exercise of the Warrants, no Holder of a
Warrant Certificate, as such, shall be entitled to any rights of a stockholder
of the Company, including, without limitation, the right to receive dividends or
subscription rights, the right to vote, to consent, to exercise any preemptive
right, to receive any notice of meetings of stockholders for the election of
directors of the Company or any other matter or to receive any notice of any
proceedings of the Company, except as may be specifically provided for herein.
Except as provided in Section 11(e), the Holders of the Warrants are not
entitled to share in the assets of the Company in the event of the liquidation,
dissolution or winding up of the Company's affairs.

                      (b) All rights of action in respect of this Agreement are
vested in the Holders of the Warrants, and any Holder of any Warrant, without
the consent of the Warrant Agent or the Holder of any other Warrant, may, on
such Holder's own behalf and for such Holder's own benefit, enforce, and may
institute and maintain any suit, action or proceeding against the Company
suitable to enforce, or otherwise in respect of, such Holder's rights hereunder,
including the right to exercise, exchange or surrender for purchase such
Holder's Warrants in the manner provided in this Agreement.

               SECTION 28. COUNTERPARTS. This Agreement may be executed in any
number of counterparts and each of such counterparts shall for all purposes be
deemed to be an original, and all such counterparts shall together constitute
but one and the same instrument.

                            [SIGNATURE PAGES FOLLOW]

                                       45

<PAGE>   49
               IN WITNESS WHEREOF, the parties hereto have caused this Agreement
to be duly executed, as of the day and year first above written.

                                           LEAP WIRELESS INTERNATIONAL, INC.

                                           By: /s/ JAMES E. HOFFMANN
                                              -------------------------------
                                                Name: James E. Hoffmann
                                                Title: Sr. Vice President

STATE STREET BANK AND TRUST COMPANY, as Warrant Agent

By: /s/ ELIZABETH C. HAMMER
   -------------------------------
     (Authorized Signature)

                                      S-1

<PAGE>   50
                                    EXHIBIT A

                          [FORM OF WARRANT CERTIFICATE]

                                     [FACE]

               Unit Legend. Each Warrant issued prior to the Separation Date
shall bear the following legend (the "UNIT LEGEND") on the face thereof:

               THE WARRANTS EVIDENCED BY THIS CERTIFICATE ARE INITIALLY ISSUED
AS PART OF AN ISSUANCE OF (I) UNITS (THE "UNITS"), EACH OF WHICH CONSIST OF
$225,000,000 PRINCIPAL AMOUNT AT MATURITY OF THE 12 1/2% SENIOR NOTES DUE 2010
OF LEAP WIRELESS INTERNATIONAL, INC. AND ONE WARRANT INITIALLY ENTITLING THE
HOLDER THEREOF TO PURCHASE 5.146 SHARES, PAR VALUE $.0001 PER SHARE, OF LEAP
WIRELESS INTERNATIONAL AND (II) UNITS, WHICH CONSIST OF $668,000,000 PRINCIPAL
AMOUNT AT MATURITY ($325,102,240 INITIAL ACCRETED VALUE) OF THE 14 1/2% SENIOR
DISCOUNT NOTES (TOGETHER WITH THE SENIOR NOTES, THE "NOTES") DUE 2010 OF LEAP
WIRELESS INTERNATIONAL, INC. AND ONE WARRANT INITIALLY ENTITLING THE HOLDER
THEREOF TO PURCHASE 2.503 SHARES, PAR VALUE $.0001 PER SHARE, OF LEAP WIRELESS
INTERNATIONAL, INC. (THE WARRANTS ISSUED IN CONNECTION WITH THE SENIOR NOTES
TOGETHER WITH THE WARRANTS ISSUED IN CONNECTION WITH THE SENIOR DISCOUNT NOTES
ARE COLLECTIVELY REFERRED TO AS "WARRANTS").

               EXCEPT AS CONTEMPLATED BY SECTION 7 OF THE WARRANT AGREEMENT,
PRIOR TO THE EARLIEST TO OCCUR OF (I) THE DATE THAT IS SIX MONTHS FOLLOWING THE
INITIAL SALE OF UNITS, (II) THE DATE ON WHICH A REGISTRATION STATEMENT WITH
RESPECT TO A REGISTERED EXCHANGE OFFER FOR THE NOTES IS DECLARED EFFECTIVE UNDER
THE SECURITIES ACT, (III) THE DATE ON WHICH A SHELF REGISTRATION STATEMENT WITH
RESPECT TO THE NOTES IS DECLARED EFFECTIVE UNDER THE SECURITIES ACT, (IV) SUCH
DATE AS MORGAN STANLEY & CO. INCORPORATED IN ITS SOLE DISCRETION SHALL DETERMINE
AND (V) THE OCCURRENCE OF A CHANGE OF CONTROL (AS DEFINED IN THE INDENTURE
GOVERNING THE NOTES) OR A PERMITTED OPTIONAL REDEMPTION OF THE SENIOR NOTES OR
THE SENIOR DISCOUNT NOTES, AS APPLICABLE (AS DEFINED IN THE INDENTURE GOVERNING
THE NOTES), THE WARRANTS EVIDENCED BY THIS CERTIFICATE MAY NOT BE TRANSFERRED OR
EXCHANGED SEPARATELY FROM, BUT MAY BE TRANSFERRED OR EXCHANGED ONLY TOGETHER
WITH, THE NOTES.

               Private Placement Legend: Each Warrant issued pursuant to an
exemption from the registration requirements of the Securities Act shall bear
the following legend (the "PRIVATE PLACEMENT LEGEND") on the face thereof

                                      A-1

<PAGE>   51
               [THE WARRANTS/SHARES OF COMMON STOCK REPRESENTED BY THIS
CERTIFICATE] HAVE NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS
AMENDED (THE "SECURITIES ACT"), AND ACCORDINGLY, MAY NOT BE OFFERED OR SOLD
WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S. PERSONS
EXCEPT AS SET FORTH IN THE FOLLOWING SENTENCE. BY ITS ACQUISITION HEREOF, THE
HOLDER (1) REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL BUYER" (AS
DEFINED IN RULE 144A UNDER THE SECURITIES ACT) OR (B) IT IS AN INSTITUTIONAL
"ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(a)(1), (2), (3) OR (7) OF
REGULATION D UNDER THE SECURITIES ACT) (AN "INSTITUTIONAL ACCREDITED INVESTOR")
[OR (C) IT IS NOT A U.S. PERSON AND IS ACQUIRING [THESE WARRANTS/THESE SHARES OF
COMMON STOCK REPRESENTED BY THIS CERTIFICATE] IN AN OFFSHORE TRANSACTION IN
COMPLIANCE WITH REGULATION S UNDER THE SECURITIES ACT,] (2) AGREES THAT IT WILL
NOT, WITHIN THE TIME PERIOD REFERRED TO UNDER RULE 144(k) UNDER THE SECURITIES
ACT AS IN EFFECT ON THE DATE OF SUCH TRANSFER, RESELL OR OTHERWISE TRANSFER
[THESE WARRANTS/THESE SHARES OF COMMON STOCK REPRESENTED BY THIS CERTIFICATE]
EXCEPT (A) TO LEAP OR ANY SUBSIDIARY THEREOF, (B) TO A QUALIFIED INSTITUTIONAL
BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, (C) INSIDE THE
UNITED STATES TO AN INSTITUTIONAL ACCREDITED INVESTOR THAT, PRIOR TO SUCH
TRANSFER, FURNISHES TO THE [WARRANT AGENT/ TRANSFER AGENT AND REGISTRAR] A
SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE
RESTRICTIONS ON TRANSFER OF [THESE WARRANTS/ THESE SHARES OF COMMON STOCK
REPRESENTED BY THIS CERTIFICATE] (THE FORM OF WHICH LETTER CAN BE OBTAINED FROM
[WARRANT AGENT/TRANSFER AGENT AND REGISTRAR]) AND, IF SUCH TRANSFER IS IN
RESPECT OF ANY WARRANTS AFTER THE SEPARATION DATE/ANY SHARES OF COMMON STOCK
REPRESENTED BY THIS CERTIFICATE], AN OPINION OF COUNSEL ACCEPTABLE TO LEAP THAT
SUCH TRANSFER IS IN COMPLIANCE WITH THE SECURITIES ACT, (D) TO A PERSON OUTSIDE
THE UNITED STATES IN AN OFFSHORE TRANSACTION IN COMPLIANCE WITH REGULATION S
UNDER THE SECURITIES ACT [THAT, FOR ANY TRANSFER PRIOR TO ONE YEAR AFTER CLOSING
FURNISHES TO THE [WARRANT AGENT/ THE TRANSFER AGENT AND REGISTRAR], PRIOR TO
SUCH TRANSFER, A SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS
RELATING TO THE RESTRICTIONS ON TRANSFER OF THE [WARRANT/SHARES OF COMMON STOCK
REPRESENTED BY THIS CERTIFICATE] (THE FORM OF WHICH LETTER CAN BE OBTAINED FROM
THE [WARRANT AGENT/THE TRANSFER AGENT AND REGISTRAR])], (E) PURSUANT TO THE
EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF
AVAILABLE) OR (F) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE
SECURITIES ACT AND (3) AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM [THESE
WARRANTS/THESE SHARES OF COMMON STOCK REPRESENTED BY THIS CERTIFICATE] ARE
TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. IN CONNECTION

                                      A-2

<PAGE>   52
WITH ANY TRANSFER OF [THESE WARRANTS/THESE SHARES OF COMMON STOCK REPRESENTED BY
THIS CERTIFICATE] WITHIN THE TIME PERIOD REFERRED TO ABOVE, THE HOLDER MUST
CHECK THE APPROPRIATE BOX SET FORTH ON THE REVERSE HEREOF RELATING TO THE MANNER
OF SUCH TRANSFER AND SUBMIT THIS CERTIFICATE TO [THE WARRANT AGENT/TRANSFER
AGENT AND REGISTRAR]. IF THE PROPOSED TRANSFEREE IS AN INSTITUTIONAL ACCREDITED
INVESTOR, THE HOLDER MUST , PRIOR TO SUCH TRANSFER, FURNISH TO THE [WARRANT
AGENT/TRANSFER AGENT AND REGISTRAR] AND LEAP SUCH CERTIFICATIONS, LEGAL OPINIONS
OR OTHER INFORMATION AS EITHER OF THEM MAY REASONABLY REQUIRE TO CONFIRM THAT
SUCH TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION
NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. AS USED
HEREIN, THE TERMS "OFFSHORE TRANSACTION," "UNITED STATES" AND "U.S. PERSON" HAVE
THE MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES ACT. THE WARRANT
AGREEMENT CONTAINS A PROVISION REQUIRING THE WARRANT AGENT TO REFUSE TO REGISTER
ANY TRANSFER OF [THESE WARRANTS/THESE SHARES OF COMMON STOCK REPRESENTED BY THIS
CERTIFICATE] IN VIOLATION OF THE FOREGOING RESTRICTIONS.

                                      A-3

<PAGE>   53
No. ___________        ___Warrants
CUSIP No. ________

                               Warrant Certificate

                        LEAP WIRELESS INTERNATIONAL, INC.

               This Warrant Certificate certifies that Cede & Co., or its
registered assigns, is the registered holder of Warrants expiring April 15, 2010
(the "Warrants") to purchase Common Stock, par value $.0001 (the "Common
Stock"), of Leap Wireless International, Inc., a Delaware corporation (the
"Company"). Each Warrant entitles the registered holder upon exercise at any
time from 9:00 a.m. on the Exercisability Date referred to below (the "Exercise
Date") until 5:00 p.m. New York City Time on April 15, 2010, to receive from the
Company [5.146]* [2.503]** fully paid and nonassessable shares of Common Stock
(the "Warrant Shares") at the exercise price (the "Exercise Price") of $96.80
per share payable upon surrender of this Warrant Certificate and payment of the
Exercise Price at the office or agency of the Warrant Agent, but only subject to
the conditions set forth herein and in the Warrant Agreement referred to on the
reverse hereof. The number of Warrant Shares issuable upon exercise of the
Warrants are subject to adjustment upon the occurrence of certain events set
forth in the Warrant Agreement.

               No Warrant may be exercised after 5:00 p.m., New York City Time
on April 15, 2010, and to the extent not exercised by such time such Warrants
shall become void.

               Reference is hereby made to the further provisions of this
Warrant Certificate set forth on the reverse hereof and such further provisions
shall for all purposes have the same effect as though fully set forth at this
place.

               This Warrant Certificate shall not be valid unless countersigned
by the Warrant Agent, as such term is used in the Warrant Agreement.

               This Warrant Certificate shall be governed by and construed in
accordance with the internal laws of the State of New York.

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

* Insert for Senior Note Warrant.

** Insert for Senior Discount Warrant.

                                      A-4

<PAGE>   54
               IN WITNESS WHEREOF, Leap Wireless International, Inc. has caused
this Warrant Certificate to be signed below.

DATED: _________, 2000

                                      LEAP WIRELESS INTERNATIONAL, INC.

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

Countersigned:

STATE STREET BANK AND TRUST COMPANY
as Warrant Agent

By:
   -------------------------------------
Authorized Signature

                                      A-5

<PAGE>   55
                        [REVERSE OF WARRANT CERTIFICATE]

               The Warrants evidenced by this Warrant Certificate are part of a
duly authorized issue of Warrants expiring at 5:00 p.m. New York City time on
April 15, 2010 entitling the holder on exercise to receive shares of Common
Stock, and are issued or to be issued pursuant to a Warrant Agreement dated as
of February 23, 2000 (the "Warrant Agreement"), duly executed and delivered by
the Company to State Street Bank and Trust Company, as warrant agent (the
"Warrant Agent"), which Warrant Agreement is hereby incorporated by reference in
and made a part of this instrument and is hereby referred to for a description
of the rights, limitation of rights, obligations, duties and immunities
thereunder of the Warrant Agent, the Company and the holders (the words
"holders" or "holder" meaning the registered holders or registered holder) of
the Warrants. A copy of the Warrant Agreement may be obtained by the holder
hereof upon written request to the Company. Except as otherwise indicated,
capitalized terms used and not otherwise defined herein have the meanings set
forth in the Warrant Agreement.

               Warrants may be exercised at any time on or after the Exercise
Date and on or before 5:00 p.m. New York City time on April 15, 2010; provided
that holders shall be able to exercise their Warrants only if a registration
statement relating to the Warrants Shares is then in effect, or the exercise of
such Warrants is exempt from the registration requirements of the Securities Act
of 1933, as amended (the "Securities Act"), and such securities are qualified
for sale or exempt from qualification under the applicable securities laws of
the states in which the various holders of the Warrants or other persons to whom
it is proposed that the Warrant Shares be issued on exercise of the Warrants
reside. In order to exercise all or any of the Warrants represented by this
Warrant Certificate, the holder must deliver to the Warrant Agent at its New
York corporate trust office set forth in Section 22 of the Warrant Agreement
this Warrant Certificate and the form of election to purchase on the reverse
hereof duly filled in and signed, which signature shall be medallion guaranteed
by an institution which is a member of a Securities Transfer Association
recognized signature guarantee program, and upon payment to the Warrant Agent
for the account of the Company of the Exercise Price for the number of Warrant
Shares in respect of which such Warrants are then exercised. No adjustment shall
be made for any dividends on any Common Stock issuable upon exercise of this
Warrant.

               The Warrant Agreement provides that upon the occurrence of
certain events the number of Warrant Shares issuable upon exercise of this
Warrant (the "Exchange Rate") may, subject to certain conditions, be adjusted.
If the Exercise Rate is adjusted, the Warrant Agreement provides that the number
of shares of Common Stock issuable upon the exercise of each Warrant shall be
adjusted. No fractions of a share of Common Stock will be issued upon the
exercise of any Warrant, but the Company will pay the cash value thereof
determined as provided in the Warrant Agreement.

               The Warrant Shares are entitled to the benefits of a registration
rights agreement (the "Warrant Registration Rights Agreement"), pursuant to
which the Company is required to file a shelf registration statement covering
the resale of the Warrants, the issuance of common stock upon the exercise the
Warrants and, under certain circumstances if required by law, the resale of
common stock issuable upon exercise of the Warrants and to use its best efforts
to cause

                                      A-6

<PAGE>   56
such registration statement to be declared effective, subject to certain
exceptions, on or prior to the date that is 180 days after the Closing Date (as
defined in the Warrant Agreement).

               Warrant Certificates, when surrendered at the office of the
Warrant Agent by the registered holder thereof in person or by legal
representative or attorney duly authorized in writing, may be exchanged, in the
manner and subject to the limitations provided in the Warrant Agreement, but
without payment of any service charge, for another Warrant Certificate or
Warrant Certificates of like tenor evidencing in the aggregate a like number of
Warrants.

               Upon due presentation for registration of transfer of this
Warrant Certificate at the office of the Warrant Agent a new Warrant Certificate
or Warrant Certificates of like tenor and evidencing in the aggregate a like
number of Warrants shall be issued to the transferee(s) in exchange for this
Warrant Certificate, subject to the limitations provided in the Warrant
Agreement, without charge except for any tax or other governmental charge
imposed in connection therewith.

               The Company and the Warrant Agent may deem and treat the
registered holder(s) thereof as the absolute owner(s) of this Warrant
Certificate (notwithstanding any notation of ownership or other writing hereon
made by anyone), for the purpose of any exercise hereof, of any distribution to
the holder(s) hereof, and for all other purposes, and neither the Company nor
the Warrant Agent shall be affected by any notice to the contrary. Neither the
Warrants nor this Warrant Certificate entitles any holder hereof to any rights
of a stockholder of the Company.

                                      A-7

<PAGE>   57
                         [FORM OF ELECTION TO PURCHASE]

                    (To Be Executed Upon Exercise Of Warrant)

               The undersigned hereby irrevocably elects to exercise the right,
represented by this Warrant Certificate, to receive _____________ shares of
Common Stock and herewith tenders payment for such shares to the order of LEAP
WIRELESS INTERNATIONAL, INC., in the amount of $__________ in accordance with
the terms hereof. The undersigned requests that a certificate for such shares be
registered in the name of _______________, whose address is __________________
and that such shares be delivered to ___________, whose address is
____________________________. If said number of shares is less than all of the
shares of Common Stock purchasable hereunder, the undersigned requests that a
new Warrant Certificate representing the remaining balance of such shares be
registered in the name of ______________________, whose address is
____________________, and that such Warrant Certificate be delivered to whose
address is ____________________.

                                    ----------------------------------------
                                    Signature

Date:

                                    ----------------------------------------
                                    Signature Guaranteed

Signatures must be guaranteed by an "eligible guarantor institution" meeting the
requirements of the Warrant Agent, which requirements include membership or
participation in the Security Transfer Agent Medallion Program ("STAMP") or such
other "signature guarantee program" as may be determined by the Warrant Agent in
addition to, or in substitution for, STAMP, all in accordance with the
Securities Exchange Act of 1934, as amended.

                                      A-8

<PAGE>   58
              SCHEDULE OF EXCHANGES OF INTERESTS OF GLOBAL WARRANTS

The following exchanges of a part of this Global Warrant have been made:

<TABLE>
<CAPTION>
                                                            Number of
                      Amount of          Amount of          Warrants in this
                      decrease in        increase in        Global Warrant     Signature of
                      Number of          Number of          following such     authorized
Date of               Warrants in this   Warrants in this   decrease or        officer of
Exchange              Global Warrant     Global Warrant     increase           Warrant Agent
--------------------------------------------------------------------------------------------
<S>                   <C>                <C>                <C>                <C>

</TABLE>

                                      A-9

<PAGE>   59
                                    EXHIBIT B

                         FORM OF CERTIFICATE OF TRANSFER

Leap Wireless International, Inc.
10307 Pacific Center Court
San Diego, CA  92121

State Street Bank and Trust Company
225 Asylum Street
Hartford, CT  06103

        Re: Warrants

               Reference is hereby made to the Warrant Agreement, dated as of
February 23, 2000 (the "WARRANT AGREEMENT"), between Leap Wireless
International, Inc., as issuer (the "COMPANY"), and State Street Bank and Trust
Company, as warrant agent. Capitalized terms used but not defined herein shall
have the meanings given to them in the Warrant Agreement.

               ___________________, (the "TRANSFEROR") owns and proposes to
transfer the Warrant[S] or interest in such Warrant[S] specified in Annex A
hereto, in the amount representing _____ Warrant Shares (the "TRANSFER"), to
___________________________ (the "TRANSFEREE"), as further specified in Annex A
hereto. In connection with the Transfer, the Transferor hereby certifies that:

                             [CHECK ALL THAT APPLY]

               1. [ ] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL
INTEREST In THE 144A GLOBAL WARRANT OR A DEFINITIVE WARRANT PURSUANT TO RULE
144A. The Transfer is being effected pursuant to and in accordance with Rule
144A under the United States Securities Act of 1933, as amended (the "Securities
Act"), and, accordingly, the Transferor hereby further certifies that the
beneficial interest or Definitive Warrant is being transferred to a Person that
the Transferor reasonably believed and believes is purchasing the beneficial
interest or Definitive Warrant for its own account, or for one or more accounts
with respect to which such Person exercises sole investment discretion, and such
Person and each such account is a "qualified institutional buyer" within the
meaning of Rule 144A in a transaction meeting the requirements of Rule 144A and
such Transfer is in compliance with any applicable blue sky securities laws of
any state of the United States. Upon consummation of the proposed Transfer in
accordance with the terms of the Warrant Agreement, the transferred beneficial
interest or Definitive Warrant will be subject to the restrictions on transfer
enumerated in the Private Placement Legend printed on the 144A Global Warrant
and/or the Definitive Warrant and in the Warrant Agreement and the Securities
Act.

                                      B-1

<PAGE>   60
               2. [ ] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL
INTEREST In THE REGULATION S GLOBAL WARRANT OR A DEFINITIVE WARRANT PURSUANT TO
REGULATION S. The Transfer is being effected pursuant to and in accordance with
Rule 903 or Rule 904 under the Securities Act and, accordingly, the Transferor
hereby further certifies that (i) the Transfer is not being made to a person in
the United States and (x) at the time the buy order was originated, the
Transferee was outside the United States or such Transferor and any Person
acting on its behalf reasonably believed and believes that the Transferee was
outside the United States or (y) the transaction was executed in, on or through
the facilities of a designated offshore securities market and neither such
Transferor nor any Person acting on its behalf knows that the transaction was
prearranged with a buyer in the United States, (ii) no directed selling efforts
have been made in contravention of the requirements of Rule 903(b) or Rule
904(b) of Regulation S under the Securities Act, (iii) the transaction is not
part of a plan or scheme to evade the registration requirements of the
Securities Act and (iv) if the proposed transfer is being made prior to the
expiration of the applicable restricted period, the transfer is not being made
to a U.S. Person or for the account or benefit of a U.S. Person (other than an
Initial Purchaser). Upon consummation of the proposed transfer in accordance
with the terms of the Warrant Agreement, the transferred beneficial interest or
Definitive Warrant will be subject to the restrictions on Transfer enumerated in
the Private Placement Legend and in the Regulation S Legend printed on the
Regulation S Global Warrant and/or the Definitive Warrant and in the Warrant
Agreement and the Securities Act.

               3. [ ] CHECK AND COMPLETE IF TRANSFEREE WILL TAKE DELIVERY OF A
DEFINITIVE WARRANT PURSUANT TO ANY PROVISION OF THE SECURITIES ACT OTHER THAN
RULE 144A OR REGULATION S. The Transfer is being effected in compliance with the
transfer restrictions applicable to beneficial interests in Restricted Global
Warrants and Restricted Definitive Warrants and pursuant to and in accordance
with the Securities Act and any applicable blue sky securities laws of any state
of the United States, and accordingly the Transferor hereby further certifies
that (check one):

        (a) [ ] such Transfer is being effected pursuant to and in accordance
        with Rule 144 under the Securities Act;

                                       or

        (b) [ ] such Transfer is being effected to the Company or a subsidiary
        thereof;

                                       or

        (c) [ ] such Transfer is being effected pursuant to an effective
        registration statement under the Securities Act and in compliance with
        the prospectus delivery requirements of the Securities Act;

                                       or

        (d) [ ] such Transfer is being effected to an Institutional Accredited
        Investor and pursuant to an exemption from the registration requirements
        of the Securities Act other than Rule 144A, Rule 144 or Rule 904, and
        the Transferor hereby further certifies that it

                                      B-2

<PAGE>   61
        has not engaged in any general solicitation within the meaning of
        Regulation D under the Securities Act and the Transfer complies with the
        transfer restrictions applicable to beneficial interests in a Restricted
        Global Warrant or Restricted Definitive Warrants and the requirements of
        the exemption claimed, which certification is supported by (1) a
        certificate executed by the Transferee in the form of Exhibit E to the
        Warrant Agreement and (2) if the Company requests, an Opinion of Counsel
        provided by the Transferor or the Transferee (a copy of which the
        Transferor has attached to this certification), to the effect that such
        Transfer is in compliance with the Securities Act. Upon consummation of
        the proposed transfer in accordance with the terms of the Warrant
        Agreement, the transferred beneficial interest or Definitive Warrant
        will be subject to the restrictions on transfer enumerated in the
        Private Placement Legend printed on the Definitive Warrants and in the
        Warrant Agreement and the Securities Act.

               4. [ ] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL
INTEREST IN AN UNRESTRICTED GLOBAL WARRANT OR OF AN UNRESTRICTED DEFINITIVE
WARRANT.

        (a) [ ] CHECK IF TRANSFER IS PURSUANT TO RULE 144. (i) The Transfer is
        being effected pursuant to and in accordance with Rule 144 under the
        Securities Act and in compliance with the transfer restrictions
        contained in the Warrant Agreement and any applicable blue sky
        securities laws of any state of the United States and (ii) the
        restrictions on transfer contained in the Warrant Agreement and the
        Private Placement Legend are not required in order to maintain
        compliance with the Securities Act. Upon consummation of the proposed
        Transfer in accordance with the terms of the Warrant Agreement, the
        transferred beneficial interest or Definitive Warrant will no longer be
        subject to the restrictions on transfer enumerated in the Private
        Placement Legend printed on the Restricted Global Warrants, on
        Restricted Definitive Warrants and in the Warrant Agreement.

        (b) [ ] CHECK IF TRANSFER IS PURSUANT TO REGULATION S. (i) The Transfer
        is being effected pursuant to and in accordance with Rule 903 or Rule
        904 under the Securities Act and in compliance with the transfer
        restrictions contained in the Warrant Agreement and any applicable blue
        sky securities laws of any state of the United States and (ii) the
        restrictions on transfer contained in the Warrant Agreement and the
        Private Placement Legend are not required in order to maintain
        compliance with the Securities Act. Upon consummation of the proposed
        Transfer in accordance with the terms of the Warrant Agreement, the
        transferred beneficial interest or Definitive Warrant will no longer be
        subject to the restrictions on transfer enumerated in the Private
        Placement Legend printed on the Restricted Global Warrants, on
        Restricted Definitive Warrants and in the Warrant Agreement.

        (c) [ ] CHECK IF TRANSFER IS PURSUANT TO OTHER EXEMPTION. (i) The
        Transfer is being effected pursuant to and in compliance with an
        exemption from the registration requirements of the Securities Act other
        than Rule 144, Rule 903 or Rule 904 and in compliance with the transfer
        restrictions contained in the Warrant Agreement and any applicable blue
        sky securities laws of any State of the United States and (ii) the
        restrictions on transfer contained in the Warrant Agreement and the
        Private Placement Legend are not required in order to maintain
        compliance with the Securities Act. Upon consummation of

                                      B-3

<PAGE>   62
        the proposed Transfer in accordance with the terms of the Warrant
        Agreement, the transferred beneficial interest or Definitive Warrant
        will not be subject to the restrictions on transfer enumerated in the
        Private Placement Legend printed on the Restricted Global Warrants or
        Restricted Definitive Warrants and in the Warrant Agreement.

               This certificate and the statements contained herein are made for
your benefit and the benefit of the Company.

                                      ---------------------------------
                                         [INSERT NAME OF TRANSFEROR]

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

Dated:
      -------------------------------

                                      B-4

<PAGE>   63
                       ANNEX A TO CERTIFICATE OF TRANSFER

1. The Transferor owns and proposes to transfer the following:

                            [CHECK ONE OF (a) OR (b)]

        (a) [ ] a beneficial interest in the:

               (i) [ ] 144A Global Warrant, or

               (ii) [ ] Regulation S Global Warrant; or

        (b) [ ] a Restricted Definitive Warrant.

2. After the Transfer the Transferee will hold:

                                   [CHECK ONE]

        (a) [ ] a beneficial interest in the:

               (i) [ ] 144A Global Warrant, or

               (ii) [ ] Regulation S Global Warrant, or

               (iv) [ ] Unrestricted Global Warrant; or

        (b) [ ] a Restricted Definitive Warrant; or

        (c) [ ] an Unrestricted Definitive Warrant,

        in accordance with the terms of the Warrant Agreement.

                                      B-5

<PAGE>   64
                                    EXHIBIT C
                         FORM OF CERTIFICATE OF EXCHANGE

Leap Wireless International, Inc.
10307 Pacific Center Court
San Diego, CA  92121

State Street Bank and Trust Company
225 Asylum Street
Hartford, CT  06103

               Re: Warrants

                              (CUSIP ____________)

               Reference is hereby made to the Warrant Agreement, dated as of
February 23, 2000 (the "WARRANT AGREEMENT"), between Leap Wireless
International, Inc., as issuer (the "COMPANY"), and State Street Bank and Trust
Company, as warrant agent. Capitalized terms used but not defined herein shall
have the meanings given to them in the Warrant Agreement.

               __________________________, (the "OWNER") owns and proposes to
exchange the Warrant[S] or interest in such Warrant[S] specified herein, in the
amount of ____________ in such Warrant[S] or interests (the "EXCHANGE"). In
connection with the Exchange, the Owner hereby certifies that:

               1. EXCHANGE OF RESTRICTED DEFINITIVE WARRANTS OR BENEFICIAL
INTERESTS IN A RESTRICTED GLOBAL WARRANT FOR UNRESTRICTED DEFINITIVE WARRANTS OR
BENEFICIAL INTERESTS IN AN UNRESTRICTED GLOBAL WARRANT

        (a) [ ] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A RESTRICTED
        GLOBAL WARRAnt TO BENEFICIAL INTEREST IN AN UNRESTRICTED GLOBAL WARRANT.
        In connection with the Exchange of the Owner's beneficial interest in a
        Restricted Global Warrant for a beneficial interest in an Unrestricted
        Global Warrant in an equal principal amount, the Owner hereby certifies
        (i) the beneficial interest is being acquired for the Owner's own
        account without transfer, (ii) such Exchange has been effected in
        compliance with the transfer restrictions applicable to the Global
        Warrants and pursuant to and in accordance with the United States
        Securities Act of 1933, as amended (the "Securities Act"), (iii) the
        restrictions on transfer contained in the Warrant Agreement and the
        Private Placement Legend are not required in order to maintain
        compliance with the Securities Act and (iv) the beneficial interest in
        an Unrestricted Global Warrant is being acquired in compliance with any
        applicable blue sky securities laws of any state of the United States.

        (b) [ ] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A RESTRICTED
        GLOBAL WARRAnt TO UNRESTRICTED DEFINITIVE WARRANT. In connection with
        the Exchange of the Owner's

                                      C-1

<PAGE>   65
        beneficial interest in a Restricted Global Warrant for an Unrestricted
        Definitive Warrant, the Owner hereby certifies (i) the Definitive
        Warrant is being acquired for the Owner's own account without transfer,
        (ii) such Exchange has been effected in compliance with the transfer
        restrictions applicable to the Restricted Global Warrants and pursuant
        to and in accordance with the Securities Act, (iii) the restrictions on
        transfer contained in the Warrant Agreement and the Private Placement
        Legend are not required in order to maintain compliance with the
        Securities Act and (iv) the Definitive Warrant is being acquired in
        compliance with any applicable blue sky securities laws of any state of
        the United States.

        (c) [ ] CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE WARRANT TO
        BENEFICIAL INTEREst IN AN UNRESTRICTED GLOBAL WARRANT. In connection
        with the Owner's Exchange of a Restricted Definitive Warrant for a
        beneficial interest in an Unrestricted Global Warrant, the Owner hereby
        certifies (i) the beneficial interest is being acquired for the Owner's
        own account without transfer, (ii) such Exchange has been effected in
        compliance with the transfer restrictions applicable to Restricted
        Definitive Warrants and pursuant to and in accordance with the
        Securities Act, (iii) the restrictions on transfer contained in the
        Warrant Agreement and the Private Placement Legend are not required in
        order to maintain compliance with the Securities Act and (iv) the
        beneficial interest is being acquired in compliance with any applicable
        blue sky securities laws of any state of the United States.

        (d) [ ] CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE WARRANT TO
        UNRESTRICTed DEFINITIVE WARRANT. In connection with the Owner's Exchange
        of a Restricted Definitive Warrant for an Unrestricted Definitive
        Warrant, the Owner hereby certifies (i) the Unrestricted Definitive
        Warrant is being acquired for the Owner's own account without transfer,
        (ii) such Exchange has been effected in compliance with the transfer
        restrictions applicable to Restricted Definitive Warrants and pursuant
        to and in accordance with the Securities Act, (iii) the restrictions on
        transfer contained in the Warrant Agreement and the Private Placement
        Legend are not required in order to maintain compliance with the
        Securities Act and (iv) the Unrestricted Definitive Warrant is being
        acquired in compliance with any applicable blue sky securities laws of
        any state of the United States.

               2. EXCHANGE OF RESTRICTED DEFINITIVE WARRANTS OR BENEFICIAL
INTERESTS IN RESTRICTED GLOBAL WARRANTS FOR RESTRICTED DEFINITIVE WARRANTS OR
BENEFICIAL INTERESTS IN RESTRICTED GLOBAL WARRANTS

        (a) [ ] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A RESTRICTED
        GLOBAL WARRAnt TO RESTRICTED DEFINITIVE WARRANT. In connection with the
        Exchange of the Owner's beneficial interest in a Restricted Global
        Warrant for a Restricted Definitive Warrant in a number equal to the
        number of beneficial interests exchanged, the Owner hereby certifies
        that the Restricted Definitive Warrant is being acquired for the Owner's
        own account without transfer. Upon consummation of the proposed Exchange
        in accordance with the terms of the Warrant Agreement, the Restricted
        Definitive Warrant issued will continue to be subject to the
        restrictions on transfer enumerated in the Private Placement Legend
        printed on the Restricted Definitive Warrant and in the Warrant
        Agreement and the Securities Act.

                                      C-2

<PAGE>   66
        (b) CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE WARRANT TO
        BENEFICIAL INTEREST IN A RESTRICTED GLOBAL WARRANT. In connection with
        the Exchange of the Owner's Restricted Definitive Warrant for a
        beneficial interest in the [CHECK ONE] [ ] 144A Global Warrant, [ ]
        Regulation S Global Warrant, in a number equal to the number of
        beneficial interests exchanged, the Owner hereby certifies (i) the
        beneficial interest is being acquired for the Owner's own account
        without transfer and (ii) such Exchange has been effected in compliance
        with the transfer restrictions applicable to the Restricted Global
        Warrants and pursuant to and in accordance with the Securities Act, and
        in compliance with any applicable blue sky securities laws of any state
        of the United States. Upon consummation of the proposed Exchange in
        accordance with the terms of the Warrant Agreement, the beneficial
        interest issued will be subject to the restrictions on transfer
        enumerated in the Private Placement Legend printed on the relevant
        Restricted Global Warrant and in the Warrant Agreement and the
        Securities Act.

               This certificate and the statements contained herein are made for
your benefit and the benefit of the Company.

                                        -------------------------------
                                          [INSERT NAME OF TRANSFEROR]

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

Dated:
      -------------------------------

                                      C-3

<PAGE>   67
                                    EXHIBIT D

                  FORM OF WARRANT REGISTRATION RIGHTS AGREEMENT

                                      D-1

<PAGE>   68
                                    EXHIBIT E

                            FORM OF CERTIFICATE FROM
                   ACQUIRING INSTITUTIONAL ACCREDITED INVESTOR

Leap Wireless International, Inc.

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

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

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

State Street Bank and Trust Company
225 Asylum Street
Hartford, CT 06103

               Re: Warrants

               Reference is hereby made to the Warrant Agreement, dated as of
February 23, 2000 (the "WARRANT AGREEMENT"), between Leap Wireless
International, Inc., as issuer (the "COMPANY"), and State Street Bank and Trust
Company, as warrant agent. Capitalized terms used but not defined herein shall
have the meanings given to them in the Warrant Agreement. In connection with our
proposed purchase of ____________ Warrants evidenced by a beneficial interest in
a Global Warrant or a Definitive Warrant, we confirm that:

               1. We understand that any subsequent transfer of the Warrants or
any interest therein is subject to certain restrictions and conditions set forth
in the Warrant Agreement and the undersigned agrees to be bound by, and not to
resell, pledge or otherwise transfer the Warrants or any interest therein except
in compliance with, such restrictions and conditions and the United States
Securities Act of 1933, as amended (the "SECURITIES Act").

               2. We understand that the offer and sale of the Warrants have not
been registered under the Securities Act, and that the Warrants and any interest
therein may not be offered or sold except as permitted in the following
sentence. We agree, on our own behalf and on behalf of any accounts for which we
are acting as hereinafter stated, that if we should sell the Warrants or any
interest therein, we will do so only (A) to the Company or any subsidiary
thereof, (B) in accordance with Rule 144A under the Securities Act to a
"qualified institutional buyer" (as defined therein), (C) to an institutional
"accredited investor" (as defined below) that, prior to such transfer, furnishes
(or has furnished on its behalf by a U.S. broker-dealer) to you and to the
Company a signed letter substantially in the form of this letter and, if
requested by the Company, an Opinion of Counsel in form reasonably acceptable to
the Company to the effect that such transfer is in compliance with the
Securities Act, (D) outside the United States in accordance with Rule 904 of
Regulation S under the Securities Act, (E) pursuant to the provisions of Rule
144(k) under the Securities Act or (F) pursuant to an effective registration
statement under the Securities Act, and we further agree to provide to any
person purchasing the Definitive Warrant from us in a transaction meeting the
requirements of clauses (A) through (E)

                                       E-1

<PAGE>   69
of this paragraph a notice advising such purchaser that resales thereof are
restricted as stated herein.

               3. We understand that, on any proposed resale of the Warrants or
beneficial interest therein, we will be required to furnish to you and the
Company such certifications, legal opinions and other information as you and the
Company may reasonably require to confirm that the proposed sale complies with
the foregoing restrictions. We further understand that the Warrants purchased by
us will bear a legend to the foregoing effect.

               4. We are an institutional "accredited investor" (as defined in
Rule 501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act) and
have such knowledge and experience in financial and business matters as to be
capable of evaluating the merits and risks of our investment in the Warrants,
and we and any accounts for which we are acting are each able to bear the
economic risk of our or its investment.

               5. We are acquiring the Warrants or beneficial interest therein
purchased by us for our own account or for one or more accounts (each of which
is an institutional "accredited investor") as to each of which we exercise sole
investment discretion.

               We agree not to engage in any hedging transactions with regard to
the Warrants unless such hedging transactions are in compliance with the
Securities Act.

               You and the Company are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceedings or official inquiry with
respect to the matters covered hereby.

                                       -----------------------------------
                                           [Insert Name of Transferor]

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

Dated:
      -------------

                                      E-2

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