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                                                                     EXHIBIT 4.6

                                                               EXECUTION VERSION
                                                    INTEL/CLEARWIRE CONFIDENTIAL

                            INVESTOR RIGHTS AGREEMENT

     THIS INVESTOR RIGHTS AGREEMENT (the "AGREEMENT") dated as of August 29,
2006, is by and among Clearwire Corporation, a Delaware corporation (the
"COMPANY"), Intel Pacific, Inc., a Delaware corporation ("INTEL"), and Motorola,
Inc., a Delaware corporation ("MOTOROLA") (Intel and Motorola individually, an
"INVESTOR," and collectively, the "INVESTORS").

     WHEREAS, the Investors have acquired and hold as of the date of this
Agreement shares of Class A common stock, $0.0001 par value (the "CLASS A COMMON
STOCK"), and Class B common stock, $0.0001 par value (the "CLASS B COMMON
STOCK"), of the Company, including those shares purchased by Intel under that
certain Common Stock Purchase Agreement dated as of June 28, 2006 (the "STOCK
PURCHASE AGREEMENT"), and by Motorola under that certain Subscription Agreement
dated as of June 30, 2006, or other securities convertible into shares of Class
A Common Stock; and

     WHEREAS, the Company wishes to grant certain registration rights with
respect to the shares of stock of the Company issued to the Investors, as
provided further herein.

     NOW THEREFORE, in consideration of the promises herein contained and other
good and valuable consideration, the parties hereto agree as follows:

     1. Definitions. As used in this Agreement:

          (i) the term "ACT" means the Securities Act of 1933, as amended, and
the rules and regulations thereunder;

          (ii) the term "AFFILIATE" of any specified Person means any other
Person directly or indirectly controlling or controlled by or under direct or
indirect common control with such specified Person. For the 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
Person whether through the ownership of voting securities or by agreement or
otherwise.

          (iii) the term "COMMISSION" means the Securities and Exchange
Commission or any other federal agency at the time administering the Act;

          (iv) the term "COMMON STOCK" means any and all classes of the
Company's common stock as authorized pursuant to the Company's Amended Restated
Certificate of Incorporation, as may be amended or restated from time to time;

          (v) the term "EXCHANGE ACT" means the Securities Exchange Act of 1934,
as amended, and the rules and regulations thereunder;

          (vi) the term "HOLDER" means an Investor, as long as such Investor
owns Registrable Securities, any Affiliate of an Investor, and any Permitted
Transferee of an Investor to whom the registration rights conferred by this
Agreement have been transferred in compliance with Section 14;

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          (vii) the terms "REGISTER," "REGISTERED" and "REGISTRATION" mean a
registration effected by preparing and filing a registration statement in
compliance with the Act (and any post-effective amendments filed or required to
be filed) and the declaration or ordering of effectiveness of such registration
statement;

          (viii) the term "PERMITTED TRANSFEREE" shall mean (i) any Affiliate of
an Investor or other Holder, (ii) any Person who acquires at least 5,000,000
shares of Registrable Securities from an Investor or other Holder;

          (ix) the term "PERSON" means an individual, corporation, limited
liability company, trust, partnership, general partnership, or other entity;

          (x) the term "REGISTRABLE SECURITIES" means (A) any Class A Common
Stock, (B) any shares of Class A Common Stock issuable upon conversion of any
Class B Common Stock of the Company, and (C) any Common Stock of the Company
issued as a dividend or other distribution with respect to, or in exchange for
or in replacement of, the shares of Class A Common Stock or Class B Common
Stock, in each case, held by any stockholder of the Company from time to time,
including the Holders;

          (xi) the term "REGISTRATION EXPENSES" means all third-party expenses
incurred by the Company in compliance with Section 2 and Section 3 hereof,
including, without limitation, all registration and filing fees, printing
expenses, accounting fees and expenses, fees and disbursements of counsel for
the Company, the underwriters and one special counsel for the selling Holders,
if any, blue sky fees and expenses and the third-party expenses of any special
audits incident to or required by any such registration (but excluding
underwriters' and brokers' discounts and commissions);

          (xii) the term "WARRANT HOLDERS REGISTRATION RIGHTS AGREEMENT" means
that certain Registration Rights Agreement, dated as of August 5, 2005, by and
among the Company and the holders of warrants to acquire shares of the Company's
common stock who are parties thereto, as it exists on the date hereof; and

          (xii) the term "WARRANT HOLDERS SHELF REGISTRATION" means a
registration of the Company's securities effected pursuant to Section 2.1 of the
Warrant Holders Registration Rights Agreement.

     2. Company Registration.

          (a) Right to Register. Whenever the Company proposes to register any
of its Common Stock under the Act, whether for its own account or for the
account of others (other than (i) a registration relating solely to employee
benefit plans, (ii) a registration relating to a corporate reorganization or
other transaction covered by Rule 145 under the Act, (iii) a registration on any
form that does not include substantially the same information as would be
required to be included in a registration statement covering the sale of the
Registrable Securities, or (iv) a registration in which the only Common Stock
being registered is Common Stock issuable upon conversion of debt securities
that are also being registered) and the registration form to be used may be used
for the registration of Registrable Securities (a "PIGGYBACK REGISTRATION"), the
Company will: (a) give prompt written notice thereof to each Holder (which shall
include a list of the jurisdictions in

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which the Company intends to attempt to qualify such securities under the
applicable blue sky or other state securities laws) and (b) upon the written
request of a Holder given within twenty (20) days after mailing of such notice
by the Company, the Company shall, subject to the provisions of this Section 2,
use commercially reasonable efforts to cause to be registered under the Act all
of the Registrable Securities that the Holder has requested to be registered.

          (b) Right to Terminate Registration. The Company shall have the right
to terminate, withdraw or delay any registration initiated by it under this
Section 2 prior to the effectiveness of such registration whether or not any
Holder has elected to include securities in such registration. The Company shall
give written notice of such determination to each Holder that has elected to
include securities in such registration and, in the case of a determination to
terminate or withdraw the registration statement, the Company shall be relieved
of its obligation to register any Registrable Securities in connection with such
registration statement, and in the case of a determination to delay
effectiveness, the Company shall be permitted to delay effectiveness for any
period. The expenses of such terminated, withdrawn or delayed registration shall
be borne by the Company in accordance with Section 3(a)(iv).

          (c) Priority on Registrations. Each Holder acknowledges and agrees
that its rights under this Section 2 shall be subject to cutback provisions
imposed by a managing underwriter under Section 2(d). If, as a result of the
cutback provisions of the preceding sentence, a Holder is not entitled to
include all of its requested Registrable Shares in such registration, then the
Holder may elect to withdraw its request to include any or all of its
Registrable Shares in such registration.

          (d) Underwritten Offerings. In the event of an underwritten offering,
the Company and each Holder shall make such arrangements with the underwriters
so that such Holder may participate in the offering on the same terms as the
Company and any other party selling securities in such offering. The Company
shall not be required under this Section 2 to include any of a Holder's
securities in such underwriting unless such Holder accepts the terms of the
underwriting as agreed upon between the Company and the underwriters selected by
it (or by other persons entitled to select the underwriters) and enters into an
underwriting agreement in customary form with an underwriter or underwriters
selected by the Company, and then only in such quantity as the underwriters
determine in their sole discretion will not jeopardize the success of the
offering by the Company. Notwithstanding any other provision of this Agreement,
if the managing underwriter(s) determine(s) in good faith that marketing factors
require a limitation of the number of shares to be underwritten, then the
managing underwriter(s) may exclude shares (including Registrable Securities)
from the registration and the underwriting, and the number of shares that may be
included in the registration and the underwriting shall be allocated, (i) first,
to the Company for securities that the Company proposes to register for its own
account; (ii) second, to any stockholders of the Company who exercised a
contractual right to demand that such registration statement be filed, on a pari
passu basis based upon the Registrable Securities held by such stockholders;
(iii) third, to each of the Holders requesting inclusion of their Registrable
Securities in such registration statement and to any other holders of incidental
or "piggyback" registration rights requesting inclusion of their Registrable
Securities in such registration statement, on a pari passu basis based upon the
Registrable Securities held by such holders; and (v) fourth, to other securities
of the Company to be registered on behalf of any other holder. Any Registrable
Securities excluded and withdrawn from such underwriting shall be withdrawn from
the

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registration. Notwithstanding the foregoing, each Holder acknowledges and agrees
that the allocation provisions set forth in this Section 2(d) are subject to
adjustment in certain circumstances to allow the Company to comply with its
obligations to the holders of Transfer Restricted Securities under the Warrant
Holders Registration Rights Agreement; provided, however, that to the extent
that the cutback provisions set forth in Section 2.2b of the Warrant Holders
Registration Rights Agreement have the effect of limiting the number of the
Holders' Registrable Securities included in any underwritten Piggyback
Registration in a manner that is disproportionate to the other holders of
incidental or "piggyback" registration rights (each, a "LIMITED PIGGYBACK
REGISTRATION"), any Registrable Securities that may be included in any future
underwritten Piggyback Registration by holders of incidental or "piggyback"
registration rights shall be allocated first to the Holders until such time as
such Registrable Securities of the Holders requested to be included in the
Limited Piggyback Registration but not included as a result of the foregoing
have been included in such Piggyback Registration and, only thereafter, will the
remaining Registrable Securities available to be included in such Piggyback
Registration be allocated to the Holders and any other holders of incidental or
"piggyback" registration rights on a pari passu basis based upon the Registrable
Securities held by such holders. For any Holder which is a partnership or
corporation, the partners, retired partners and shareholders of such Holder, or
the estates and family members of any such partners and retired partners and any
trusts for the benefit of any of the foregoing persons shall be deemed to be a
single "Holder," and any pro rata reduction with respect to such "Holder" shall
be based upon the aggregate amount of shares carrying registration rights owned
by all Persons included in such "Holder," as defined in this sentence.

     3. Demand and Form S-3 Registrations.

          (a) Demand Registration.

               (i) Request by Holders. If the Company shall receive at any time
after six (6) months after the effective date of the Company's initial public
offering of its securities pursuant to a registration filed under the Act, a
written request from the Holders of a majority of the Registrable Securities
then outstanding that the Company file a registration statement under the Act
covering the registration of Registrable Securities pursuant to this Section
3(a), then the Company shall, within twenty (20) days after the receipt of such
written request, give written notice of such request (the "REQUEST NOTICE") to
all Holders, and effect, as soon as practicable, the registration and all such
qualifications and compliances as may be so requested and as would permit or
facilitate the sale and distribution of all or such portion of the Registrable
Securities as are specified in such request and any additional requests by other
Holders received by the Company within twenty (20) days after receipt of the
Request Notice, subject only to the limitations of this Section 3(a); provided
that the Registrable Securities requested to be registered pursuant to such
request must have an anticipated aggregate price to the public (before any
underwriting discounts and commissions) of not less than Twenty-Five Million
Dollars ($25,000,000).

               (ii) Maximum Number of Demand Registrations. Notwithstanding the
limitations set forth in Section 3(a)(i), and in addition to the rights set
forth therein, the Company is obligated pursuant to this Section 3(a) to effect
one (1) demand registration for Intel and its Permitted Transferees and one (1)
demand registration for Motorola and its Permitted Transferees; provided,
however, if all of the Holders' Registrable Securities that were requested to be
included in a registration pursuant to this Section 3(a) were not included in
such registration

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as a result of cutback provisions imposed by a managing underwriter pursuant to
Section 3(c) or otherwise, then such registration shall not count against Holder
as a demand registration under this Section 3(a)(ii) and the Company shall be
obligated to effect one (1) additional registration pursuant to this Section
3(a).

               (iii) Deferral. Notwithstanding the foregoing, if the Company
shall furnish to Holders requesting the filing of a registration statement
pursuant to this Section 3(a), a certificate signed by the President or Chief
Executive Officer of the Company stating that, in the good faith judgment of the
Board of Directors of the Company, it would be seriously detrimental to the
Company and its stockholders for such registration statement to be filed at such
time and it is therefore essential to defer the filing of such registration
statement, then the Company shall have the right to defer such filing for a
period of not more than ninety (90) days after receipt of the request of the
Initiating Holders; provided, however, that the Company may not utilize this
right more than once in any twelve (12) month period.

               (iv) Expenses for Withdrawn Registrations. Notwithstanding the
provisions of Section 5(a), the Company shall not be required to pay for any
expenses of any registration proceeding begun pursuant to this Section 3(a) if
the registration request is subsequently withdrawn at the request of the Holders
of a majority of the Registrable Securities to be registered, unless the Holders
of a majority of the Registrable Securities then outstanding agree to forfeit
their right to the demand registration pursuant to this Section 3(a) (in which
case such right shall be forfeited by all Holders of Registrable Securities);
provided, further, however, that if at the time of such withdrawal, the Holders
have learned of a material adverse change in the condition, business, or
prospects of the Company not actually known to the Holders at the time of their
request for such registration and have withdrawn their request for registration
with reasonable promptness after learning of such material adverse change, then
the Holders shall not be required to pay any of such expenses and shall retain
their demand registration right pursuant to this Section 3(a) notwithstanding
such withdrawal.

          (b) Form S-3 Registration.

               (i) After the Company is eligible to register Registrable
Securities on Form S-3, each Holder shall have the right to demand the Company
effect a registration with respect to all or a part of its Registrable
Securities on Form S-3 and any related qualification or compliance. Any such
demand shall not be considered a demand registration request pursuant to Section
3(a). Upon receipt of written request, the Company shall, as soon as
practicable, (i) give written notice of the proposed registration to all other
Holders, and any related qualification and compliance, and (ii) effect such
registration and all such qualifications and compliances as may be so requested
and as would permit or facilitate the sale and distribution of all or such
portion of such Holder's Registrable Securities as are specified in such request
together with the Registrable Securities requested to be included by any other
Holders who notify the Company in writing within 10 business days after receipt
of such notice from the Company; provided, however, that the Company shall not
be obligated to effect any such registration, qualification or compliance
pursuant to this Section 3(b):

                    (A) if Form S-3 is not available for such offering by the
Holder;

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                    (B) if the Holder, together with the holders of any other
securities of the Company entitled to inclusion in such registration, propose to
sell Registrable Securities and such other securities (if any) at an aggregate
price to the public of less than Five Million Dollars ($5,000,000);

                    (C) if the Company shall furnish to the Holder a certificate
signed by the President or Chief Executive Officer of the Company stating that,
in the good faith judgment of the Board of Directors of the Company, it would be
seriously detrimental to the Company and its shareholders for such Form S-3
Registration to be effected at such time, in which event the Company shall have
the right to defer the filing of the Form S-3 registration statement no more
than once during any twelve (12) month period for a period of not more than one
hundred eighty (180) days following receipt of the request of the Holder under
this Section 3(b);

                    (D) if the Company has, within the 12 month period preceding
the date of such request, already effected one (1) registration on Form S-3
pursuant to this Section 3(b); provided, however, if all of the Holders'
Registrable Securities requested to be included in the prior registration were
not included in the prior registration as a result of cutback provisions imposed
by a managing underwriter pursuant to Section 3(c) below, then the Holders shall
have the right to demand one (1) additional registration on Form S-3 during such
12-month period; or

                    (E) in any particular jurisdiction in which the Company
would be required to qualify to do business or to execute a general consent to
service of process in effecting such registration, qualification or compliance.

          (c) Underwriting. If the Holders initiating the registration request
under this Section 3 (the "INITIATING HOLDERS") intend to distribute the
Registrable Securities covered by their request by means of an underwriting,
then they shall so advise the Company as a part of its request made pursuant to
this Section 3 and the Company shall include such information in the notices
referred to in Section 3(a)(i) or Section 3(b)(i), as applicable. In such event,
the right of any Holder to include his, her or its Registrable Securities in
such registration shall be conditioned upon such Holder's participation in such
underwriting and the inclusion of such Holder's Registrable Securities in the
underwriting (unless otherwise mutually agreed by a majority in interest of the
Initiating Holders and such Holder) to the extent provided herein. All Holders
proposing to distribute their securities through such underwriting shall enter
into an underwriting agreement in customary form with the managing underwriter
or underwriters selected for such underwriting by the Company and approved by a
majority in interest of the Initiating Holders. Notwithstanding any other
provision of Section 3, if the underwriter(s) advise(s) the Company in writing
that marketing factors require a limitation of the number of securities to be
underwritten then the Company shall so advise all Holders of Registrable
Securities that would otherwise be registered and underwritten pursuant hereto,
and the number of Registrable Securities that may be included in the
underwriting shall be reduced as required by the underwriter(s) and allocated
(i) first, to each of the Holders who exercised a contractual right, pursuant to
Section 3 to demand that such registration statement be filed, on a pari passu
basis based upon the Registrable Securities held by such Holders; (ii) second,
to any other holders of incidental or "piggyback" registration rights requesting
inclusion of their Registrable Securities in such registration statement, on a
pari passu basis based upon the Registrable Securities held by such holders; and
(iii) third, other securities of the Company to be registered on behalf of any
other holder. If, as a result of the

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cutback provisions of the preceding sentence, a Holder is not entitled to
include all of its requested Registrable Shares in such registration, then the
Holder may elect to withdraw its request to include any or all of its
Registrable Shares in such registration. Any Registrable Securities excluded and
withdrawn from such underwriting shall be withdrawn from the registration.
Notwithstanding the foregoing, each Holder acknowledges and agrees that (a) the
allocation provisions set forth in this Section 3(c) are subject to adjustment
in certain circumstances to allow the Company to comply with its obligations to
the holders of Transfer Restricted Securities under the Warrant Holders
Registration Rights Agreement, and (b) the obligation of the Company to effect a
registration pursuant to Section 3 is subject to the Company's covenant under
Section 2.1 of the Warrant Holders Registration Rights Agreement not to register
any securities for certain holders in advance of registering the Transfer
Restricted Securities pursuant to such agreement.

     4. Registration Procedures. In the case of each registration effected by
the Company pursuant to Section 2 or Section 3, the Company will use
commercially reasonable efforts to effect such registration, including:

          (a) Prepare and file with the Commission a registration statement with
respect to such Registrable Securities and use commercially reasonable efforts
to cause such registration statement to become effective (provided that before
filing a registration statement or prospectus or any amendments or supplements
thereto, the Company shall furnish to the counsel selected by the Holders of a
majority of the Registrable Securities covered by such registration statement
copies of all such documents proposed to be filed, including each preliminary
prospectus, which documents shall be subject to the review and comment of such
counsel);

          (b) Prepare and file with the Commission such amendments and
supplements to such registration statement and the prospectus used in connection
therewith as may be necessary to keep such registration statement effective for
a period of not less than thirty (30) days and comply with the provisions of the
Act with respect to the disposition of all securities covered by such
registration statement during such period in accordance with the intended
methods of disposition thereof by the Holders holding the securities covered by
the registration statement as set forth in such registration statement;

          (c) Furnish to each Holder promptly, and in no event more than five
business days after the same is prepared and filed with the Commission, such
number of copies of such registration statement, each amendment and supplement
thereto, the prospectus included in such registration statement (including each
preliminary prospectus) and such other documents as such Holder may reasonably
request in order to facilitate the disposition of the Registrable Securities
owned by such Holder;

          (d) Use reasonable efforts to register or qualify the Registrable
Securities covered by the registration statement under such other securities or
blue sky laws of such United States jurisdictions as the Holder thereof may
reasonably request and do any and all other acts and things that may be
reasonable necessary or advisable to enable such Holder to consummate the
disposition in such jurisdictions of the Registrable Securities owned by such
Holder, provided that the Company will not be required to (a) qualify generally
to do business in any jurisdiction where it would not otherwise be required to
qualify for this subparagraph, (b) subject itself to taxation in any such
jurisdiction or (c) consent to general service of process in any such
jurisdiction;

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          (e) Notify each Holder promptly, but in no event more than two
business days after the occurrence of the event, at any time when a registration
statement under the Act that registers any of such Holder's Registrable
Securities is effective, of the happening of any event as a result of which the
prospectus included in such registration statement contains an untrue statement
of a material fact or omits any fact necessary to make the statements therein
not misleading, and, at the request of such Holder, the Company will prepare a
supplement or amendment to such prospectus so that, as thereafter delivered to
the purchasers of such Registrable Securities, such prospectus shall not contain
an untrue statement of a material fact or omit to state a fact necessary to make
the statements therein not misleading;

          (f) Cause all such Registrable Securities to be listed on such
securities exchange or market on which the Company's Common Stock is then
listed; and

          (g) Furnish, at a Holder's request, on the date that the Holder's
Registrable Securities are delivered to the underwriters for sale in connection
with a registration pursuant to this Agreement, if such securities are being
sold through underwriters, or, if such securities are not being sold through
underwriters, on the date that the registration statement with respect to such
securities becomes effective, (A) an opinion, dated such date, of the counsel
representing the Company for the purposes of such registration, in form and
substance as is customarily given to underwriters in an underwritten public
offering, addressed to the underwriters, if any, and to a Holder, if Holder
requests registration and (B) a letter dated such date, from the independent
certified public accountants of the Company, in form and substance as is
customarily given by independent certified public accountants to underwriters in
an underwritten public offering, addressed to the underwriters, if any.

     5. Registration Expenses; Delay.

          (a) Expenses of Company Registration. The Company shall pay (i) all of
the Registration Expenses and (ii) all transfer taxes and brokerage and
underwriters' discounts and commissions attributable to the securities being
sold by the Company. Each Holder shall pay all transfer taxes and brokerage and
underwriters' discounts and commissions attributable to the Registrable
Securities being sold by such Holder.

          (b) Delay of Registration. No Holder shall have any right to obtain or
seek an injunction restraining or otherwise delaying any such registration as
the result of any controversy that might arise with respect to the
interpretation of this Agreement.

     6. Requirement to Discontinue Disposition. Each Holder agrees that, upon
receipt of any notice from Company of the happening of any event of the kind
described in Section 4(e), such Holder will discontinue disposition of its
Registrable Securities pursuant to such registration statement until such
Holder's receipt of the copies of the supplemented or amended prospectus
contemplated by Section 4(e), or until such Holder is advised in writing by
Company that the use of the prospectus may be resumed, and has received copies
of any additional or supplemental filings that are incorporated by reference in
the prospectus, and, if so directed by the Company, such Holder will deliver to
the Company (at the Company's expense) all copies, other than permanent file
copies then in such Holder's possession, of the prospectus covering such
Registrable Securities which are current at the time of the receipt of such
notice.

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     7. Information from Holder. It shall be a condition precedent to the
obligations of the Company to take any action pursuant to Section 2 or Section 3
with respect to a Holder's Registrable Securities that such Holder furnish to
the Company for inclusion in the specific registration statement (and any
prospectus included therein) such information regarding itself, the Registrable
Securities held by it, and the intended method of disposition of such securities
as shall be required to effect the registration of Holder's Registrable
Securities; provided that the use of such information shall be limited to the
specific registration statement (or any prospectus included therein) for which
it was provided and shall not be used in any summary or free writing prospectus.

     8. Indemnification.

          (a) The Company agrees to indemnify and hold harmless, to the extent
permitted by law, each Holder, its directors and officers and each person who
controls the Company (within the meaning of the Act) and any of such person's
agents or representatives, its legal counsel and accountants, any underwriter
and any controlling person of such underwriter, and its legal counsel against
all losses, liabilities, claims, damages and expenses ("LOSSES") caused by (A)
any untrue or alleged untrue statement of material fact contained in any
registration statement in which such Holder is participating, or any prospectus,
preliminary prospectus, summary or free writing prospectus, or any amendment
thereof or supplement to any of the foregoing or any omission or alleged
omission of material fact required to be stated therein or necessary to make the
statements therein not misleading, except insofar as the same are caused by or
contained in any information furnished in writing to the Company or any
underwriter by such Holder expressly for use therein or results from such
Holder's failure to deliver a copy of the registration statement or prospectus
or any amendments or supplements thereto after the Company has furnished such
Holder with the number of copies of the same requested by such Holder or (B) any
violation or alleged violation by the Company of the Act, the Exchange Act, any
state securities laws or any rule or regulation promulgated under the Act, the
Exchange Act or any state securities laws in connection with the sale of
securities by such Holder pursuant to any registration statement in which such
Holder is participating, and the Company, in each case, will reimburse each such
Holder, officer, director, controlling person or other aforementioned person for
any legal or other expenses reasonably incurred by them in connection with
investigating or defending any such losses, liabilities, claims, damages or
expenses or action as such expenses are incurred; provided, however, that the
indemnity agreement contained in this Section 8 shall not apply to amounts paid
in settlement of any such Losses if such settlement is effected without the
consent of the Company (which consent shall not be unreasonably withheld).

          (b) Each Holder, severally and not jointly, will indemnify, to the
extent permitted by law, the Company, its directors and officers and each person
who controls Company (within the meaning of the Act) and any of such person's
agents or representatives, its legal counsel and accountants, any underwriter
and any controlling person of such underwriter, against any Losses resulting
from (A) any untrue or alleged untrue statement of material fact contained in
the registration statement, prospectus or preliminary prospectus or any
amendment thereof or supplement thereto or any omission or alleged omission of a
material fact required to be stated therein or necessary to make the statements
therein not misleading, but only to the extent that such untrue statement or
omission is contained in any information or affidavit so furnished in writing by
such Holder expressly for use in such registration statement, or (B) such
Holder's failure to deliver a

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copy of the registration statement or prospectus or any amendments or
supplements thereto after the Company has furnished such Holder with the number
of copies of the same requested by such Holder; and each such Holder will
reimburse any person intended to be indemnified pursuant to this Section 8(b)
for any legal or other expenses reasonably incurred by such person in connection
with investigating or defending any such losses, liabilities, claims, damages or
expenses or action as such expenses are incurred provided, however, that (i) the
indemnity agreement contained in this Section 8(b) shall not apply to amounts
paid in settlement of any Losses if such settlement is made without the consent
of the Holder, which consent shall not be unreasonably withheld, and (ii) the
obligations of such Holders hereunder shall be limited to an amount equal to the
net proceeds to each such Holder from the sale of Registrable Securities in the
transaction giving rise to the Losses.

          (c) The indemnification provided for under this Agreement will remain
in full force and effect regardless of any investigation made by or on behalf of
the Indemnified Party (as defined herein) or any officer, director, or
controlling person of such Indemnified Party and will survive the transfer of
Registrable Securities. The Indemnifying Party also agrees to make such
provisions, as are reasonably requested by an Indemnified Party, for
contributions (in such proportion as is appropriate to reflect the relative
fault of the Indemnifying Party on the one hand and of the Indemnified Party on
the other in connection with the actions that gave rise to any Losses) to such
party in the event such Indemnifying Party's indemnification is unavailable for
any reason; provided, however, that in no event shall any contribution by a
Holder under this Section 8(c) exceed the net proceeds to such Holder from the
sale of Registrable Securities in the transaction giving rise to the Losses.

          (d) Each party entitled to indemnification under this Section 8 (the
"INDEMNIFIED PARTY") shall give notice to the party required to provide
indemnification (the "INDEMNIFYING PARTY") promptly after such Indemnified Party
has actual knowledge of any claim as to which indemnity may be sought, and shall
permit the Indemnifying Party to assume the defense of any such claim or any
litigation resulting therefrom; provided that counsel for the Indemnifying
Party, who shall conduct the defense of such claim or any litigation resulting
therefrom, shall be approved by the Indemnified Party (whose approval shall not
unreasonably be withheld) and the Indemnified Party may participate in such
defense at the Indemnified Party's expense (unless the Indemnified Party shall
have reasonably concluded that there may be a conflict of interest between the
Indemnifying Party and the Indemnified Party in such action, in which case the
fees and expenses of counsel shall be at the expense of the Indemnifying Party),
and provided further that the failure of any Indemnified Party to give notice as
provided herein shall not relieve the Indemnifying Party of its obligations
under this Section 8 unless the Indemnifying Party is materially prejudiced
thereby. No Indemnifying Party, in the defense of any such claim or litigation,
shall, except with the consent of the Indemnified Party, consent to entry of any
judgment or enter into any settlement which does not include as an unconditional
term thereof the giving by the claimant or plaintiff to such Indemnified Party
of a release from all liability in respect to such claim or litigation. The
Indemnified Party shall furnish such information regarding itself or the claim
in question as an Indemnifying Party may reasonably request in writing and as
shall be reasonably required in connection with the defense of such claim and
litigation resulting therefrom.

          (e) If the indemnification provided for in this Section 8 is held by a
court of competent jurisdiction to be unavailable to an Indemnified Party with
respect to any Losses, then

                                       10

<PAGE>

the Indemnifying Party, in lieu of indemnifying such Indemnified Party
hereunder, shall contribute to the amount paid or payable by such Indemnified
Party as a result of such loss, liability, claim, damage or expense, in such
proportion as is appropriate to reflect the relative fault of the Indemnifying
Party on the one hand and of the Indemnified Party on the other, in connection
with the statements or omissions which resulted in Losses, as well as any other
relevant equitable considerations; provided, however, that in no event shall any
contribution by a Holder under this Section 8(e) exceed the net proceeds to such
Holder from the sale of Registrable Securities in the transaction giving rise to
the Losses. The relative fault of the Indemnifying Party and of the Indemnified
Party shall be determined by reference to, among other things, whether the
untrue or alleged untrue statement of a material fact or the omission to state a
material fact relates to information supplied by the Indemnifying Party or by
the Indemnified Party and the parties' relative intent, knowledge, access to
information and opportunity to correct or prevent such statement or omission.

          (f) Notwithstanding the foregoing, to the extent that the provisions
on indemnification and contribution contained in the underwriting agreement
entered into in connection with any underwritten public offering contemplated by
this Agreement are in conflict with the foregoing provisions, the provisions in
such underwriting agreement shall be controlling.

          (g) The obligations of the Company and Holders under this Section 8
shall survive the completion of any offering of Registrable Securities in a
registration statement under Section 2 or Section 3 and otherwise.

     9. Rule 144 Reporting. With a view to making available the benefits of
certain rules and regulations of the Commission which may permit the sale of
restricted securities to the public without registration the Company agrees to:

          (a) keep public information available as those terms are understood
and defined in Rule 144, at all times from and after ninety (90) days following
the effective date of the first registration under the Act filed by the Company
for an offering of its Common Stock to the general public;

          (b) file with the Commission all reports and other documents required
of the Company under the Act and the Exchange Act at any time after it has
become subject to such reporting requirements; and

          (c) so long as any Holder owns any Registrable Securities, furnish to
such Holder upon request, a written statement by the Company as to its
compliance with the reporting requirements of Rule 144 (at any time from and
after ninety (90) days following the effective date of the first registration
statement filed by the Company for an offering of its securities to the general
public), and of the Act and the Exchange Act (at any time after it has become
subject to such reporting requirements), a copy of the most recent annual or
quarterly report of the Company, and such other reports and documents so filed
as such Holder may reasonably request in availing itself of any rule or
regulation of the Commission allowing such Holder to sell any such securities
without registration.

     10. "Market Stand-off" Agreement. If requested by the Company or an
underwriter of capital stock or other securities of the Company in connection
with the Company's initial public

                                       11

<PAGE>

offering, each Holder agrees not to sell or otherwise transfer or dispose of any
capital stock or other securities of the Company, excluding capital stock
acquired in the Company's initial public offering, held by such Holder during
the 180 day period following such initial public offering, provided that all
directors and officers of the Company and stockholders owning at least 2% of the
Company's capital stock agree to the same transfer restrictions. Any provisions
allowing for discretionary waivers or termination of the transfer restrictions
in similar agreements by and among the Company and any of the Company's
directors, officers, shareholders or representatives of the underwriters shall
also be offered to the Holders. If requested by a managing underwriter in
connection with the Company's initial public offering, such Holder shall execute
a separate agreement to the foregoing effect. The Company may impose
stop-transfer instructions with respect to the shares (or securities) subject to
the foregoing restriction until the end of such period.

     11. Rights Granted to Other Investors.

          (a) [***] This Section 11(a) will terminate upon the closing of a
firmly underwritten public offering of any of the Common Stock.

          (b) The Company shall not grant any registration rights relating to
its securities after the date hereof without the written consent of the
Investors holding a majority of the Registrable Securities held by the Investors
unless such rights are subordinate to or pari passu with the rights of the
Investors under this Agreement.

     12. Termination. The registration rights set forth in this Agreement shall
terminate and not be available to each Holder on the earlier of (i) the date
that the Registrable Securities then owned by such Holder can be sold without
restriction in any 90-day period pursuant to Rule 144 under the Act and (ii) the
date that is five (5) years following the consummation of the Company's initial
public offering of its Common Stock. In addition, the registration rights set
forth in this Agreement shall terminate upon the transfer or assignment of all
of the Registrable Securities held by all Holders to parties who are not
Permitted Transferees. Upon termination pursuant to this Section 12 the Company
shall no longer be obligated to provide notice of a proposed registration to
such Holder.

     13. Notices. All communications provided for hereunder shall be sent by
first-class mail or facsimile and (a) if addressed to a Holder, addressed to the
Holder at the address or fax number set forth below such Holder's signature, or
at such other address or fax number as such Holder shall have furnished to the
Company in writing or (b) if addressed to the Company, to the address or fax
number set forth below the Company's signature or at such other address or fax
number, or to the attention of such other officer, as the Company shall have
furnished to Holder in writing. Notices sent by first-class mail shall be deemed
received three days after the date of deposit of such notice in the United
States mail. Notices sent by facsimile shall be deemed received upon receipt by
the notified party's facsimile machine.

     14. No Assignment. This Agreement is personal to each Investor and shall
not be assignable, by operation of law or otherwise to any third party, except
as set forth herein. Notwithstanding the foregoing, any Permitted Transferee of
an Investor shall be entitled to the rights granted hereunder, provided that the
Company is given written notice at the time of said

[*** Confidential Treatment Requested]

                                       12

<PAGE>

transfer or assignment identifying the name and address of the Permitted
Transferee and that the Permitted Transferee assumes in writing the obligations
of the Investor under this Agreement.

     15. Descriptive Headings. The descriptive headings of the several sections
and paragraphs of this Agreement are inserted for reference only and shall not
limit or otherwise affect the meaning hereof.

     16. Governing Law. This Agreement shall be construed and enforced in
accordance with, and the rights of the parties shall be governed by, the laws of
the State of Delaware.

     17. No Inconsistent Agreements. The Company will not on or after the date
of this Agreement enter into any agreement with respect to its securities that
conflicts with or would limit the rights granted to the Holders in this
Agreement or otherwise conflicts with the provisions hereof.

     18. Amendments and Waivers. Any term of this Agreement may be amended and
the observance of any term may be waived (either generally or in a particular
instance and either retroactively or prospectively) only upon the written
consent of the Company and each Investor. The failure of any party to insist on
or to enforce strict performance by the other parties of any of the provisions
of this Agreement or to exercise any right or remedy under this Agreement shall
not be construed as a waiver or relinquishment to any extent of that party's
right to assert or rely on any provisions, rights or remedies in that or any
other instance; rather, the provisions, rights and remedies shall remain in full
force and effect.

     19. Counterparts. This Agreement may be executed simultaneously in any
number of counterparts, each of which shall be deemed an original, but all such
counterparts shall together constitute one and the same instrument.

                                       13

<PAGE>

     IN WITNESS WHEREOF, the parties have caused this agreement to be executed
and delivered as of the date first above written.

COMPANY:

CLEARWIRE CORPORATION                   Address:
                                        5808 Lake Washington Blvd. NE, Suite 300
                                        Kirkland, WA 98033
By: /s/ Benjamin G. Wolff               Facsimile No: (425) 216-7900
    ---------------------------------   Attn: Broady Hodder, General Counsel
Name: Benjamin G. Wolff
Title: Co-President & Co-CEO

INVESTORS:

INTEL PACIFIC, INC.                     Address:
                                        c/o Intel Corporation
                                        2200 Mission College Blvd., RN6-46
By: /s/ Arvind Sodhari                  Santa Clara, CA 95054-1549
    ---------------------------------   Attn: Intel Capital Portfolio Manager
Name: Arvind Sodhari                    Fax Number: (408) 765-6038
Title: President

MOTOROLA, INC.                          Address:
                                        1475 W. Shure Drive
                                        Arlington Heights, IL 60004
By: /s/ Don McLellan                    Facsimile No: 847-632-3020
    ---------------------------------   Attn: Kevin Gilbert
Name: Don McLellan
Title: Corporate VP                     With a copy to:

                                        1303 East Algonquin Road
                                        Schaumburg, Illinois 60196
                                        Facsimile No: (847) 576-3750
                                        Attn: General Counsel

                                        and

                                        Winston & Strawn LLP
                                        35 West Wacker Drive
                                        Chicago, Illinois 60601
                                        Attention: Oscar A. David, Esq.
                                        Fax: (312) 558-5700

             [SIGNATURE PAGE TO CLEARWIRE INVESTOR RIGHTS AGREEMENT]<PAGE>

                                                                   Exhibit 10.10

                                   AGREEMENT

This Agreement (this "AGREEMENT") is entered into as of March 5, 2003, by and
among Nextel Communications, Inc., a Delaware corporation (the "COMPANY"),
Digital Radio, L.L.C., a Washington limited liability company ("INVESTOR") and
Craig O. McCaw ("INDIVIDUAL").

Unless the context otherwise requires, terms that are capitalized and not
otherwise defined in context have the meanings set forth in Article 5 of this
Agreement.

                                    RECITALS

A. On April 4, 1995, the Company, Investor and Individual entered into the
Securities Purchase Agreement (as amended through the date hereof, the "SPA").

B. Pursuant to the SPA, on July 28,1995, Investor purchased, among other things,
shares of Class A Convertible Redeemable Preferred Stock of the Company ("CLASS
A PREFERRED STOCK") and shares of Class B Convertible Preferred Stock of the
Company ("CLASS B PREFERRED STOCK").

C. Prior to the Effective Date of this Agreement, as the holder of the Class A
Preferred Shares, Investor had elected three representatives to the Board of the
Company (the "INVESTOR DIRECTORS").

D. Also on April 4,1995, the Company and Eagle River, Inc., a Washington
corporation ("EAGLE RIVER") entered into a Management Support Agreement (the
"MANAGEMENT SUPPORT AGREEMENT") and an Incentive Option Agreement (the
"INCENTIVE OPTION").

E. The Company, Investor and Individual desire to terminate certain agreements
and modify their relationships as provided in this Agreement.

F. The Incentive Option is not being modified and, in accordance with its terms,
will remain exercisable until April 4, 2005.

                                    AGREEMENT

                          1. TERMINATION OF AGREEMENTS

1.1 TERMINATION OF SPA. On the Effective Date, the SPA will terminate. From and
after the Effective Date, the SPA will be void and have no further force or
effect.

1.2 TERMINATION OF MANAGEMENT SUPPORT AGREEMENT. On the Effective Date and from
and after effective the Effective Date, the Company and Eagle River will
terminate the Management Support Agreement.

                         2. CONDITIONS TO EFFECTIVENESS

2.1 EFFECTIVE DATE. The Effective Date of this Agreement shall be the date when
all of the following actions have been taken (the "EFFECTIVE DATE"):

<PAGE>

a.   Investor shall have caused each of the Investor Directors to submit his
     resignation as a director to the Company, which shall provide that such
     resignations shall be effective upon acceptance by action of a majority of
     the members of the Company's Board (excluding the Investor Directors).

b.   The Operations Committee shall have acted by the vote of a majority of its
     Members at a meeting duly called, convened and held, or by unanimous action
     of the Operations Committee, to terminate the existence of the Operations
     Committee, and such action shall have been approved and ratified by the
     Company's Board.

c.   Investor as the holder of the all the issued and outstanding shares of
     Class A Preferred Stock shall have delivered written notice to the Company
     that the holder elects to convert all the outstanding shares of Class A
     Preferred Stock into shares of Class A Common Stock of the Company ("CLASS
     A COMMON STOCK").

d.   Investor as the holder of the issued and outstanding shares of Class B
     Preferred Stock shall have surrendered certificates together with
     instruments of transfer duly executed for all the outstanding Class B
     Preferred Stock in exchange for 82 shares of Class A Common Stock.

2.2 POST-EFFECTIVE DATE COVENANT. The Company, Investor and Individual will each
use its or his respective best efforts to cause each of the actions contemplated
by this Section 2.2 to occur as promptly as practicable after the Effective
Date.

a.   The Directors of the Company shall elect J. Timothy Bryan to serve the
     remainder of the term for the vacancy created by his resignation until the
     annual stockholders meeting of the Company in 2003.

b.   Conditional upon receiving a Required Letter, the Directors of the Company
     shall elect Individual to serve the remainder of the term for the vacancy
     created by his resignation until the annual stockholders meeting of the
     Company in 2004.

c.   Conditional upon receiving a Required Letter, the Directors of the Company
     shall elect Dennis M. Weibling to serve the remainder of the term for the
     vacancy created by his resignation until the annual stockholders meeting of
     the Company in 2005.

d.   Contemporaneously with the actions contemplated in Section 2.2 a., b. and
     c. the Directors of the Company shall approve and the Company shall execute
     indemnification agreements with Individual and Messrs. Bryan and Weibling
     granting to them the same indemnification granted to other non-management
     directors of the Company.

                              3. SOLE WIRELESS PLAY

3.1 EXCLUSIVE WIRELESS PARTICIPATION. From and after the Effective Date, neither
Investor nor any Controlled Affiliate shall: (i)except as contemplated by
Section 3.2, directly or

                                       -2-
<PAGE>

indirectly acquire or seek to acquire any license granted by the FCC for two-way
terrestrial-based mobile wireless communications systems, (ii)except for an
investment constituting not more than 3% of the outstanding common stock of ATT
Corporation owned by Individual and for individual investments of not more than
$100,000, own any direct or indirect equity interest in a Person that engages or
proposes to engage in two-way terrestrial-based mobile wireless communications
systems in the region that includes any part of North America or South America,
(iii)serve as an officer, director, employee, manager or consultant of or to a
Person that engages or proposes to engage in two-way terrestrial-based mobile
wireless communications systems in the region that includes any part of North
America or South America unless in each such instance the opportunity to acquire
the FCC license, own the equity interest or serve in that capacity (each a
"WIRELESS OPPORTUNITY") was first offered to the Company pursuant to Section3.2.
Ownership by Investor or any Controlled Affiliate of securities of Western
Wireless, Inc. constituting less than three percent (3%) of its outstanding
capital stock and the purchase of additional securities therein for aggregate
consideration of not more than $1,000,000 in the aggregate shall not be a
violation of this Section3.1 or Section3.2. The terms of this Section3.1 shall
continue to apply to Investor and all Controlled Affiliates until February 13,
2004. As used in this Agreement, "MOBILE" systems include all vehicular and
other portable (hand held or otherwise) systems.

3.2 FIRST RIGHT TO WIRELESS OPPORTUNITY. If Investor or any of the other
Controlled Affiliates becomes aware of a Wireless Opportunity, that Person shall
give notice to the Company under Section6.2 of the Wireless Opportunity and, to
the extent known, of the circumstances surrounding the Wireless Opportunity. As
promptly as practicable following such notification, the President shall report
to the Board his recommendation concerning whether the Company should pursue the
Wireless Opportunity. Following the report of the President, not more than
30days after such notification, a majority of Disinterested Directors will elect
whether or not to pursue such Wireless Opportunity. If the Company elects not to
pursue such Wireless Opportunity, Investor, Individual and their respective
Affiliates shall be free to pursue that Wireless Opportunity for its, his or
their own account on terms no more favorable to the other party than those
offered to the Company. The Company, Investor and Individual shall use their
respective good faith best efforts to create and put in place appropriate
mechanisms to ensure reasonable and effective protection for confidential
information of Investor or Individual disclosed pursuant to this Section3.2.

3.3 CONFIDENTIAL INFORMATION AND ACTUAL OR POTENTIAL CONFLICTS. If Investor,
Individual or any of the other Controlled Affiliates pursued a "wireless
opportunity" under Section8.3(b) of the SPA or pursues a Wireless Opportunity
for its or their own account as permitted by Section3.2, the Company, Investor
and Individual shall use their respective good faith best efforts to create and
put in place appropriate mechanisms to ensure reasonable and effective
protection for confidential information of the Company and otherwise to minimize
the prospect of any apparent or actual conflict of interest between pursuit of
such Wireless Opportunity and the conduct of the Company's wireless
communications businesses. The obligations of Investor and Individual under the
preceding sentence shall continue for so long as it or he, or any of their
respective Affiliates, equity holders, officers, directors, managers, employees
or nominees are or is proposed to be a Director or an officer of the Company,
and shall be in addition to, and not a limitation on or in lieu of, any other
obligations imposed on such Persons or entities pursuant to applicable Law or
fiduciary obligations.

                                       -3-

<PAGE>

                        4. REPRESENTATIONS AND WARRANTIES

4.1 By COMPANY. The Company hereby represents and warrants to Investor and
Individual that:

a.   The Company is a corporation duly organized, validly existing and in good
     standing under the laws of the state of Delaware and has all requisite
     corporate or other power and authority to carry on its business as now
     conducted, and to enter into and to perform this agreement.

b.   The Company has taken all necessary corporate action to authorize the
     execution and delivery and, when the actions necessary to the Effective
     Date have occurred, the performance of this Agreement. This Agreement has
     been duly 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 may be limited by applicable
     bankruptcy, insolvency, reorganization, moratorium and other similar laws
     of general application which may affect the enforcement of creditors'
     rights generally and by general equitable principles.

c.   To the best of the Company's knowledge, it has complied with all of its
     obligations and performed all of its duties under the SPA to and
     including the Effective Date, and it is not aware of any existing breach by
     Individual or Investor of their respective obligations or duties under the
     SPA.

4.2 BY INVESTOR. Investor hereby represents and warrants to the Company that:

a.   The Investor is a limited liability company duly organized, validly
     existing and in good standing under the laws of the state of Washington
     and has all requisite limited liability company or other power and
     authority to carry on its business as now conducted, and to enter into and
     to perform this agreement.

b.   The Investor has taken all necessary action to authorize the execution and
     delivery and the performance of this Agreement. This Agreement has been
     duly executed and delivered by the Investor and constitutes a valid and
     binding agreement of the Investor enforceable against the Investor in
     accordance with its terms, except as may be limited by applicable
     bankruptcy, insolvency, reorganization, moratorium and other similar laws
     of general application which may affect the enforcement of creditors'
     rights generally and by general equitable principles.

c.   To the best of the Investor's knowledge, it has complied with all of its
     obligations and performed all of its duties under the SPA to and
     including the Effective Date, and it is not aware of any existing breach by
     the Company of its obligations and duties under the SPA.

4.3 BY INDIVIDUAL. Individual represents and warrants to the Company that:

a.   Individual is a resident of the State of Washington and is authorized to
     execute, deliver and perform this Agreement without the need to obtain
     the consent or

                                       -4-
<PAGE>

     approval of any third party (other than any such consent or approval
     already obtained). This Agreement has been duly executed and delivered by
     Individual and constitutes a valid and binding agreement of Individual
     enforceable against Individual in accordance with its terms, except as may
     be limited by applicable bankruptcy, insolvency, reorganization, moratorium
     and other similar laws of general application which may affect the
     enforcement of creditors' rights generally and by general equitable
     principles.

b.   Individual Controls Eagle River and Eagle River has taken all necessary
     corporate action to authorize the termination of the Management Support
     Agreement.

c.   To the best of the Individual's knowledge, he and his Controlled Affiliates
     have complied with all of his and their respective obligations and
     performed all of its duties under the SPA to and including the Effective
     Date, and he is not aware of any existing breach by the Company of its
     obligations and duties under the SPA.

                                 5. DEFINITIONS

5.1 CERTAIN DEFINITIONS

"AFFILIATE" means, as to any Person, another Person that directly or indirectly
through one or more intermediaries, Controls, or is Controlled by, or is under
common Control with, such Person. For the purposes of this definition, "CONTROL"
when used with respect to any Person, means the possession, directly or
indirectly, of the power to direct or cause the direction of the management and
policies of such Person, whether through the ownership of voting securities, by
contract or otherwise; the terms "CONTROLLING" and "CONTROLLED" have meanings
correlative to the foregoing; provided, that the term "CONTROLLED AFFILIATE" as
used herein includes Individual and any Affiliate of Individual that is, at the
relevant time, Controlled by Individual; and further provided, that the Company
and Investor shall not be deemed to be direct or indirect Affiliates of each
other.

"BOARD" means the Board of the Company.

"DIRECTORS" means any and all of the duly elected members of the Board.

"DISINTERESTED DIRECTOR" means with respect to any contract or transaction
between the Company and any other Person that is the subject of any vote by the
Board, members of the Board who would not be a party to, or who would not have a
financial interest in, such contract or transaction (an "INTERESTED PARTY") and
are not at the time of such vote and are not expected to become following such
vote either Directors of the Company who are nominees of, or who are Affiliates
of, such an Interested Party or officers, directors, or employees of, and do not
have (and are not expected to receive) a financial interest in, such an
Interested Party. For purposes of this definition, no person would be deemed not
to be a Disinterested Director solely because such person is the beneficial
owner of any voting securities of the Company, but no Director that is an
Affiliate of Investor or of any of its Controlled Affiliates shall be a
Disinterested Director

                                       -5-

<PAGE>

for purposes of considering any Wireless Opportunity or any transaction with
Investor or any of its Affiliates.

"FCC" means the Federal Communications Commission.

"GOVERNMENTAL AUTHORITY" means any governmental or political subdivision or
department thereof, any governmental or regulatory body, commission, board,
bureau, agency or instrumentality, or any court or arbitrator or alternative
dispute resolution body, in each case whether domestic or foreign, federal,
state or local.

"LAW" means any domestic or foreign, federal, state or local law, statute,
ordinance, rule or regulation.

"PERSON" means an individual, partnership, corporation, limited liability
company, business trust, joint stock company, trust, unincorporated association,
joint venture, Governmental Authority or other, entity of whatever nature or a
group, including without limitation any pension, profit sharing or other benefit
plan or trust.

"REQUIRED LETTER" means an undated resignation letter from the individual
being elected which resignation can be accepted by the Board if the stockholders
of the Company do not ratify his election at the next annual meeting of the
Company's stockholders.

5.2 OTHER DEFINITIONAL PROVISIONS.

a.   All terms defined in this Agreement have the defined meanings when used in
     any certificate, report or other documents made or delivered pursuant
     hereto or thereto, unless the context otherwise requires.

b.   Terms defined in the singular have a comparable meaning when used in the
     plural, and vice versa.

c.   As used herein, the neuter gender also denotes the masculine and feminine,
     and the masculine gender also denotes the neuter and feminine, where the
     context so permits.

d.   The words "INCLUDE," "INCLUDING" and "OR" mean without limitation by
     reason of enumeration.

                                   6. GENERAL

6.1 PUBLIC ANNOUNCEMENTS. Except as required by Law, the exercise of fiduciary
duty or the policies or rules of any stock exchange (or the NASDAQ-NMS) on which
the Company's securities are listed, the form and content of all press releases
or other public communications of any sort relating to the subject matter of
this Agreement, and the method of their release, or publication thereof by any
of the parties hereto or their respective Affiliates, shall be subject to the
prior approval of Investor and the Company, which approval shall not be
unreasonably withheld or delayed.

                                       -6-
<PAGE>

6.2 NOTICES. All notices, demands, requests, certificates or other
communications under this Agreement shall be in writing and shall be deemed to
have been duly given when (i)hand delivered, (ii)sent by facsimile transmission
or by tested or otherwise authenticated telex or cable, (iii)one day after sent
by commercial courier guaranteeing next business day delivery or (iv)five days
after posting in the United States mail having been sent by registered or
certified mail return receipt requested, addressed as follows:

(i)  if to Company:

     Nextel Communications, Inc.
     2001 Edmund Halley Drive
     Reston, VA 20191
     Attention: Timothy M. Donahue, President
     Facsimile: (703)433-4352

     with a copy to:

     Nextel Communications, Inc.
     2001 Edmund Halley Drive
     Reston, VA 20191
     Attention: Leonard J. Kennedy, General Counsel
     Facsimile: (703)433-4846

(ii) if to Individual or Investor:

     Digital Radio, L.L.C.
     2320 Carillon Point
     Kirkland, WA 94104-2675
     Attention: Dennis Weibling
     Facsimile: (206)828-8060

     with a copy to:

     Digital Radio, L.L.C.
     2320 Carillon Point
     Kirkland, WA 94104-2675
     Attention: J. Timothy Bryan
     Facsimile: (206)828-8060

Any communication delivered after business hours or on a Saturday, Sunday or
legal holiday at the place designated in such delivery shall be deemed for
purposes of computing any time period hereunder to have been delivered on the
next business day.

6.3 EXPENSES. Each party shall bear its own expenses, including the fees and
expenses of any attorneys, accountants, investment bankers, brokers, finders or
other intermediaries or other Persons engaged by Investor or the Company,
incurred in connection with this Agreement or the other agreements contemplated
hereby.

                                       -7-

<PAGE>

6.4 BENEFITS; ASSIGNMENT. The provisions of this Agreement shall be binding
upon, and inure to the benefit of, Investor and the Company and their respective
successors and permitted assigns. Nothing in this Agreement, express or implied,
is intended to confer upon any Person other than Investor and the Company and
their respective successors and permitted assigns any rights, remedies or
obligations under or by reason of this Agreement. None of the rights or
obligations of the Company hereunder may be assigned without the consent of
Investor. None of the rights of the Investor or Individual hereunder may be
assigned without the consent of the Company.

6.5 ENTIRE AGREEMENT; AMENDMENT AND WAIVER. This Agreement (which includes the
Exhibits and Annexes hereto) and the other documents to be executed pursuant to
Section 1.2 and the Required Letters to which either Investor or any of its
Controlled Affiliates or the Company is a party constitute the entire agreement
between Investor and its Controlled Affiliates, on the one hand, and the
Company, on the other hand, with respect to the subject matter hereof and
thereof and supersede all prior agreements and understandings, both written and
oral, between Investor and its Controlled Affiliates, on the one hand, and the
Company, on the other hand, with respect to the subject matter hereof and
thereof. This Agreement may not be amended, supplemented or otherwise modified
except by an instrument in writing signed by each of the parties hereto. No
waiver by either party hereto of any of the provisions hereof shall be effective
unless explicitly set forth in writing and executed by such party. Any waiver by
a party of a breach of this Agreement shall not operate or be construed as a
waiver of any subsequent breach.

6.6 HEADINGS. The headings in this Agreement are for convenience only and shall
not affect the construction hereof.

6.7 GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF DELAWARE WITHOUT GIVING EFFECT
TO ANY CONFLICTS OF LAW PRINCIPLES OF SUCH STATE.

6.8 REMEDIES.

a.   Each of Investor and its Controlled Affiliates, on the one hand, and the
     Company, on the other hand, acknowledges that the other party (or parties)
     would not have an adequate remedy at Law for money damages in the event
     that any of the covenants or agreements of such party in this Agreement was
     not performed in accordance with its terms, and it is therefore agreed that
     each of Investor and its Controlled Affiliates, on the one hand, and the
     Company, on the other hand, in addition to and without limiting any other
     remedy or right such party may have, shall have the right to an injunction
     or other equitable relief in any court of competent jurisdiction, enjoining
     any such breach and enforcing specifically the terms and provisions hereof,
     and each of Investor and its Controlled Affiliates, on the one hand, and
     the Company, on the other hand, hereby waive any and all defenses such
     party may have on the ground of lack of jurisdiction or competence of the
     court to grant such an injunction or other equitable relief.

                                       -8-

<PAGE>

b.   All rights, powers and remedies provided under this Agreement or otherwise
     available in respect hereof at Law or in equity shall be cumulative and not
     alternative, and the exercise or beginning of the exercise of any thereof
     by any party shall not preclude the simultaneous or later exercise of any
     other such right, power or remedy by such party.

6.9 SEVERABILITY. In the event that any provision of this Agreement is deemed
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

6.10 COUNTERPARTS. This Agreement may be executed in one or more counterparts,
each of which shall be deemed an original, and it shall not be necessary in
making proof of this Agreement to produce or account for more than one such
counterpart.

6.11 COMMUNICATIONS ACT. Nothing in this Agreement is intended or shall be
construed to diminish or affect the control of the Company or any of its
subsidiaries over any FCC licenses held by the Company or such subsidiary in any
manner prohibited by the Communications Act of 1934, as amended, or the rules
and regulations issued by the FCC.

6.12 FURTHER ASSURANCES. Each of Investor and Individual (and his Controlled
Affiliates, if appropriate) will cooperate with the Company in effecting the
amendment or termination of other documents (such as, without limitation, the
Company's Certificate of Incorporation and By-Laws) that may, in the Company's
reasonable judgment, be necessary or desirable to reflect, confirm or conform to
the matters and actions contemplated in this Agreement.

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

                                        NEXTEL COMMUNICATIONS, INC

                                        By: /s/ Leonard J. Kennedy
                                            ------------------------------------
                                        Name: Leonard J. Kennedy
                                        Title: Senior Vice President and
                                               General Counsel

                                        DIGITAL RADIO, L.L.C

                                        By: /s/ Craig O. McCaw
                                            ------------------------------------
                                        Name: Craig O. McCaw
                                        Title: Chairman and Chief Executive
                                               Officer

                                        /s/ Craig O. McCaw
                                        ----------------------------------------
                                        CRAIG O. MCCAW,
                                        for his sole and separate estate

                                       -9-

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