EXHIBIT 10.1

                      NEXTBAND INTERESTS PURCHASE AGREEMENT

     This NEXTBAND  Interests  Purchase Agreement (this "Agreement") is made and
entered into as of March 31, 1999 between Nextel Spectrum  Acquisition  Corp., a
Delaware  corporation  ("NSAC")  and NEXTLINK  Communications,  Inc., a Delaware
corporation ("Purchaser").

W I T N E S S E T H:

     WHEREAS, NSAC wishes to sell, and Purchaser wishes to purchase,  subject to
the terms and conditions set forth herein, NSAC's interests in NEXTBAND
Communications, L.L.C.;

     WHEREAS,  the NSAC and Purchaser intend to enter into a Registration Rights
Agreement in the form  attached  hereto as Exhibit A (the  "Registration  Rights
Agreement", and together with this Agreement, the "Agreements"); and

     WHEREAS, NSAC and Purchaser desire to make certain agreements in connection
with the transactions contemplated hereby.

     NOW,   THEREFORE,   in   consideration   of   the   premises   and  of  the
representations, warranties, covenants and agreements hereinafter set forth, the
parties hereto agree as follows:

                                   ARTICLE I.

                         PURCHASE AND SALE OF INTERESTS

     1.1. AUTHORIZATION OF SALE. NSAC has authorized the sale to Purchaser,  and
Purchaser has  authorized  the purchase  from NSAC, of all of NSAC's  membership
interest (the  "Interests") in NEXTBAND Communications, L.L.C, a Washington
limited  liability company  ("NEXTBAND"),  which  constitute  50%  of  the
outstanding  membership interests.

     1.2.  PURCHASE AND SALE OF INTERESTS.  Subject to the terms and  conditions
set  forth  in this  Agreement  and in  reliance  upon  NSAC's  and  Purchaser's
representations  set forth below,  on the Closing  Date (as defined  below) NSAC
shall sell to Purchaser,  and Purchaser  shall purchase from NSAC, the Interests
for (i) $68,850,000 in cash plus an amount equal to 25% of the net proceeds (the
"25%  Offering  Proceeds"),  if  any,  received  by  Purchaser  in  the  initial
underwritten   offering   conducted  pursuant  to  the  terms  of  that  certain
Registration  Rights  Agreement  (the "WNP RRA")  between  Purchaser and certain
stockholders  of WNP  Communications,  Inc.,  dated  January  14, 1999 (the "WNP
Initial  Offering")  (the  "Monetary  Purchase  Price") plus (ii) an  additional
$68,850,000  less  the  25%  Offering  Proceeds,  if  any,  to  be  payable,  at
Purchaser's  election,  either in (A) cash,  (B) shares of  Purchaser's  Class A
Common Stock,  par value $.02 per share  ("Purchaser  Common  Stock") or (C) any
combination  of cash and  shares  of  Purchaser  Common  Stock  (the  "Remaining
Purchase  Price").  Such sale and purchase



shall be effected on the Closing Date by NSAC executing and delivering to
Purchaser an Assignment of Interests in the form attached hereto as Exhibit B
against payment or delivery as appropriate, by Purchaser to NSAC of the Monetary
Purchase Price and the Remaining Purchase Price. Purchaser shall pay the
Monetary Purchase Price and such portion of the Remaining Purchase Price that
Purchaser elects to pay in cash by wire transfer of immediately available funds
to such account as NSAC shall designate, with such designation to occur not less
than three (3) Business Days prior to the Closing Date. Purchaser shall deliver
shares of Purchaser Common Stock to NSAC having a value (determined as provided
in the next sentence) equal to the balance, if any, of the Remaining Purchase
Price not paid in cash. Each share of Purchaser Common Stock so delivered shall
be deemed to have a value equal to its Volume-Weighted Average Trading Price (as
defined below) for the twenty trading days preceding (but not including) the
Closing Date hereunder (with appropriate adjustments for any stock splits, stock
dividends or the like that may occur during such period).

     1.3.  CLOSING.  The closing of the purchase and sale of the Interests  (the
"Closing")  shall be scheduled  for a date no later than the fifth  Business Day
following the date on which all the conditions contained in Sections 5.1, 5.2(d)
and 5.3(e) shall have been  satisfied  or waived.  The date on which the Closing
occurs  is  herein  referred  to as the  "Closing  Date" On the day prior to the
Closing Date,  unless  Purchaser has  delivered to NSAC an  irrevocable  written
election to pay the entire Remaining Purchase Price in cash,  Purchaser and NSAC
shall  execute the  Registration  Rights  Agreement.  If on the Closing Date any
other  condition to the Closing has not been satisfied or waived by the party or
parties entitled to the benefit of the same, any party (other than a party whose
failure to perform its  obligations  under this Agreement is responsible for the
failure of such conditions) shall have the right to terminate this Agreement.

     1.4.  DEFINITION.  "Volume-Weighted  Average Trading Price" means,  for any
period,  (i) the  average of the daily  prices for each  trading day during such
period,  with each daily  price  computed  as the  product of (x) the sale price
times (y) the number of shares of  Purchaser  Common  Stock sold at such  price,
divided by (ii) the total number of shares of  Purchaser  Common Stock so traded
during such trading day, all as reported by Bloomberg, L.P.



                                   ARTICLE II.

                     REPRESENTATIONS AND WARRANTIES OF NSAC

     NSAC represents and warrants to Purchaser as follows:

     2.1. ORGANIZATION AND GOOD STANDING.  NSAC is a corporation duly organized,
validly  existing and in good  standing  under the laws of the State of Delaware
and has all requisite  corporate  power and authority to own,  lease and operate
its properties and to carry on its business as now being conducted. NSAC is duly
qualified or licensed and in good  standing to do business in each  jurisdiction
in which the  character of the property  owned,  leased or operated by it or the
nature of the  business  conducted by it makes such  qualification  or licensing
necessary,  except where the failure so to be duly  qualified or licensed and in
good standing

                                      -2-



would not be reasonably likely to have a material adverse effect
on (i) the business, assets, condition (financial or other), prospects or
results of operations of NEXTBAND or (ii) the Interests (an "NSAC Material
Adverse Effect"). NSAC has heretofore made available to Purchaser accurate and
complete copies of the Certificate of Incorporation and Bylaws, as currently in
effect, of NSAC. Unrestricted Subsidiary Funding Company, a Delaware corporation
and a wholly-owned subsidiary of Nextel Communications, Inc., is the sole
stockholder of NSAC.

     2.2.  AUTHORIZATION; BINDING  AGREEMENT. NSAC has all requisite  corporate
power and authority to execute and deliver this  Agreement and to consummate the
transactions  contemplated  hereby,  including,   without  limitation,  the  due
authorization and approval for sale of the Interests to Purchaser. The execution
and  delivery  of  this  Agreement  and  the  consummation  of the  transactions
contemplated  hereby  have  been  duly and  validly  authorized  by the Board of
Directors of NSAC,  and no other  corporate  proceedings on the part of NSAC are
necessary  to  authorize  the  execution  and  delivery of this  Agreement or to
consummate the transactions  contemplated  hereby.  This Agreement has been duly
and validly executed and delivered by NSAC and constitutes the legal,  valid and
binding agreement of NSAC enforceable against NASC in accordance with its terms,
except to the extent that  enforceability  thereof may be limited by  applicable
bankruptcy,  insolvency,  reorganization  or other  similar laws  affecting  the
enforcement of creditors' rights generally and by principles of equity regarding
the availability of remedies ("Enforceability Exceptions").

     2.3. GOVERNMENTAL  APPROVALS.  To the best of NSAC's knowledge, no consent,
approval,  waiver or authorization of, Consent"), any government,  any political
subdivision,  any  governmental  or regulatory  authority,  agency,  department,
board,  commission,  administration or instrumentality  or any court,  tribunal,
arbitrator or  self-regulatory  organization  ("Governmental  Authority") on the
part of NSAC is required in connection with the execution or delivery by NSAC of
this  Agreement or the  consummation  by NSAC of the  transactions  contemplated
hereby  other than (i) FCC  approval of the LMDS  license  transfer  application
contemplated  hereby and (ii)  expiration  or early  termination  of the waiting
period  under  the  Hart-Scott-Rodino  Antitrust  Improvements  Act of 1976 (the
"H-S-R Act").

     2.4. NO  VIOLATIONS.  The  execution  and delivery of this  Agreement,  the
consummation of the transactions contemplated hereby and compliance by NSAC with
any of the provisions  hereof will not (i) conflict with or result in any breach
of any  provision  of its  Certificate  of  Incorporation  or  Bylaws  or  other
governing  instruments, (ii) require any Consent under or result in a violation
or breach of, or constitute  (with or without notice or lapse of time or both) a
default (or give rise to any right of termination, cancellation or acceleration)
under,  or permit  the  acceleration  of rights  under or  termination  of,  any
indenture,  mortgage, deed of trust, credit agreement, note or other evidence of
indebtedness,  or other material agreement of NSAC, (iii) result in the creation
or imposition of any lien or  encumbrance  of any kind upon any of NSAC's assets
or (iv) subject to obtaining the consents from Governmental Authorities referred
to in Section 2.3 hereof, contravene any Law to which NSAC or any of its assets
or properties are

                                      -3-



subject, except in the case of clauses (ii), (iii) and (iv), above, for any
deviations from the foregoing which would not be reasonably likely to have an
NSAC Material Adverse Effect.

     2.5. CONDUCT OF NSAC. NSAC has taken no actions which (i) to its knowledge,
have adversely affected or (ii) reasonably could be expected to adversely affect
NEXTBAND,  the LMDS licenses owned by NEXTBAND, or the Interests.  NSAC owns and
will convey valid title to the Interests  free and clear of all liens and rights
of others  (excluding  those of or arising  under or through any other member of
NEXTBAND) and has not, in its capacity as a member of NEXTBAND,  caused NEXTBAND
to enter into any binding  agreements or arrangements with third parties without
the knowledge of the Purchaser.

     2.6.  LITIGATION.  There is no suit,  action or  proceeding  pending or, to
NSAC's knowledge,  threatened  against NSAC, nor is there any judgment,  decree,
injunction,  rule or order of any  Governmental  Authority  outstanding  against
NSAC.

     2.7. FINDERS AND INVESTMENT  BANKERS.  Neither NSAC nor any of its officers
or  directors  has  employed  any  broker or finder or  otherwise  incurred  any
liability for any  brokerage  fees,  commissions  or finders' fees in connection
with the transactions  contemplated hereby for which the Purchaser or any of its
stockholders would be liable.

                                  ARTICLE III.

                   REPRESENTATIONS AND WARRANTIES OF PURCHASER

     3.1.  ORGANIZATION  AND GOOD  STANDING.  Purchaser  is a  corporation  duly
organized,  validly existing and in good standing under the laws of the State of
Delaware and has all requisite  corporate  power and authority to own, lease and
operate its  properties  and to carry on its  business  as now being  conducted.
Purchaser is duly  qualified or licensed and in good  standing to do business in
each  jurisdiction  in which the  character  of the  property  owned,  leased or
operated  by it or the  nature  of  the  business  conducted  by it  makes  such
qualification  or  licensing  necessary,  except where the failure so to be duly
qualified or licensed and in good  standing  would not be  reasonably  likely to
have a material adverse effect on the business,  assets, condition (financial or
other),  prospects or results of operations  of Purchaser  and its  subsidiaries
taken  as a  whole  (a  "Purchaser  Material  Adverse  Effect").  Purchaser  has
heretofore   made  available  to  NSAC  accurate  and  complete  copies  of  the
Certificate of Incorporation and Bylaws, as currently in effect, of Purchaser.

     3.2.  AUTHORIZATION;   BINDING  AGREEMENT.   Purchaser  has  all  requisite
corporate  power and  authority  to execute and deliver  this  Agreement  and to
consummate the transactions contemplated hereby, including,  without limitation,
the due  authorization  and  approval  for  issuance of  Purchaser  Common Stock
issuable at the Closing,  if any. The execution  and delivery of this  Agreement
and the consummation of the transactions contemplated hereby, including, but not
limited to, the purchase of the Interests, have been duly and validly authorized
by the Board of Directors of Purchaser and no other corporate proceedings on the
part of Purchaser  are

                                      -4-



necessary to authorize the execution and delivery of this
Agreement or to consummate the transactions contemplated hereby. This Agreement
has been duly and validly executed and delivered by Purchaser and constitutes
the legal, valid and binding agreements of Purchaser, enforceable against it in
accordance with its terms, subject to the Enforceability Exceptions.

     3.3.  GOVERNMENTAL  APPROVALS.  No  Consent  from or with any  Governmental
Authority on the part of Purchaser is required in connection  with the execution
or delivery by Purchaser of this Agreement or the  consummation  by Purchaser of
the  transactions  contemplated  hereby  other than as set forth in Section 2.3.
Purchaser  or a  wholly-owned  subsidiary  of Purchaser  holds a 50%  membership
interest  in  NEXTBAND  and  Purchaser  has no reason to believe  that it is not
qualified to hold the Interests.  Purchaser (i) is not a foreign person or under
the control of a foreign person,  (ii) is not, is not controlled by and does not
control  any  incumbent  local  exchange  carrier,  and  (iii)  is  not,  is not
controlled by and does not control any CATV system in any market  covered by the
LMDS Licenses (as all such terms are used in the  Communications Act of 1996 and
the LMDS  Rules) and as of the date  hereof is not aware of any reason why it is
not qualified to hold the Interests under the LMDS Rules.

     3.4. NO  VIOLATIONS.  The  execution  and delivery of this  Agreement,  the
consummation of the transactions contemplated hereby and compliance by Purchaser
with any of the provisions  hereof will not (i) conflict  with or result in any
breach of any provision of the Certificate of  Incorporation  or Bylaws or other
governing instruments of Purchaser, (ii) require any Consent under or result in
a violation or breach of, or constitute (with or without notice or lapse of time
or both) a default (or give rise to any right of  termination,  cancellation  or
acceleration)  under, or permit the  acceleration of rights under or termination
of, any indenture,  mortgage,  deed of trust,  credit  agreement,  note or other
evidence of indebtedness, or other material agreement of Purchaser, (iii) result
in the creation or imposition of any lien or encumbrance of any kind upon any of
the  assets  of Purchaser or (iv) subject  to  obtaining  the  Consents  from
Governmental  Authorities referred to in Section 2.3 hereof, contravene any Law
to which  Purchaser or any of its assets or properties are subject,  except,  in
the case of clauses (ii),  (iii) and (iv) above,  for any  deviations  from the
foregoing  which would not be  reasonably  likely to have a  Purchaser  Material
Adverse Effect.

     3.5.  SECURITIES  FILINGS.  Purchaser  has made  available to NSAC true and
complete  copies of (i) its Annual  Report  on  Form 10-K  for the year  ended
December  31,  1998,  as filed  with the SEC,  together  with all  Exhibits  and
Schedules  thereto, (ii) its proxy  statement  relating  to the meeting of its
stockholders held on May 20, 1998, as filed with the SEC, and (iii) all other
reports,   statements  and  registration   statements  and  amendments   thereto
(including,  without  limitation,  Quarterly  Reports on  Form 10-Q and Current
Reports on Form 8-K,  as amended)  filed by Purchaser with the SEC since January
1, 1998,  together  with all Exhibits  and  Schedules  thereto.  The reports and
statements  specified  in  clauses (i) through (iii) above are  referred  to
collectively herein as the "Purchaser Securities Filings" As of their respective
dates, or as of the date of the last amendment thereof, if amended after filing,
none of the Purchaser  Securities  Filings  contained any untrue  statement of a
material fact or omitted to state a material fact required to be stated  therein
or necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading.

                                      -5-



     3.6. PURCHASER FINANCIAL  STATEMENTS.  The audited  consolidated  financial
statements and unaudited interim financial  statements of Purchaser  included in
the Purchaser  Securities  Filings (the "Purchaser  Financial  Statements") have
been  prepared in  accordance  with  generally  accepted  accounting  principles
applied on a  consistent  basis  (except as may be  indicated  therein or in the
notes  thereto) and present  fairly,  in all material  respects,  the  financial
position  of  Purchaser  and its  subsidiaries  as at the dates  thereof and the
results of their  operations  and cash flows for the periods then ended subject,
in the case of the unaudited  interim financial  statements,  to normal year-end
audit  adjustments,  any other  adjustments  described therein and the fact that
certain  information and notes have been condensed or omitted in accordance with
the Securities Exchange Act of 1934, as amended (the "Exchange Act").

     3.7. CAPITALIZATION. As of the date hereof, the authorized capital stock of
Purchaser consists of 110,334,000  shares of Purchaser Common Stock,  44,133,600
shares of Class B Common Stock,  par value $.02 per share and 25,000,000  shares
of preferred stock, par value $.01 per share ("Purchaser  Preferred Stock").  As
of December  31, 1998,  (a)  24,154,938  shares of  Purchaser  Common Stock were
issued  and  outstanding, (b) 30,523,242  shares of Class B Common  Stock  were
issued and outstanding, (c) 11,254,623 shares of Purchaser Preferred Stock were
issued and outstanding  and (d) no shares of Purchaser  Common Stock were issued
and held in the treasury of Purchaser.  As of the date hereof,  no other capital
stock of Purchaser is authorized or issued. All issued and outstanding shares of
Purchaser  Common  Stock are duly  authorized,  validly  issued,  fully paid and
non-assessable.

     3.8.  VALID  ISSUANCE.  Purchaser  Common  Stock,  if and  when  issued  in
accordance  with the  provisions  of this  Agreement,  will be duly  authorized,
validly issued, fully paid and nonassessable.

     3.9.  FINDERS  AND  INVESTMENT  BANKERS.  None of  Purchaser  or any of its
officers or directors  has  employed any broker or finder or otherwise  incurred
any liability for any brokerage fees, commissions or finders' fees in connection
with  the  transactions  contemplated  hereby  to  which  NSAC  or  any  of  its
stockholders would be liable.

     3.10. EXISTING REGISTRATION RIGHTS. Exhibit 3.10 attached hereto sets forth
a list of all  agreements  in  effect  on the  date  hereof  pursuant  to  which
Purchaser  has granted  registration  rights  with  respect to any of its equity
securities,  together  with a  designation  of the number and type of securities
covered thereby.  Purchaser has delivered to NSAC true and correct copies of all
provisions of such agreements relating to such rights.


                                   ARTICLE IV.

                              ADDITIONAL COVENANTS

     4.1.  FURTHER  ASSURANCES.  Each of the parties  shall,  from time to time,
whether before or after the Closing, execute such documents and other papers and
take such further

                                      -6-



actions as may be reasonably required or desirable to carry out the provisions
hereof and the transactions contemplated hereby.

     4.2. PUBLIC ANNOUNCEMENTS.  So long as this Agreement is in effect, neither
party will issue any press release or make any other  announcement  with respect
to the  transactions  contemplated  in this  Agreement,  other than  disclosures
required by law to be made in any report,  statement or  registration  statement
filed by a party or its affiliates with the SEC. Without limiting the generality
of the foregoing, no press release or other voluntary announcement shall be made
unless the  content  and  wording of same has been  approved  in advance  and in
writing by both parties.

     4.3. AGREEMENTS PRIOR TO CLOSING.  NSAC and the Purchaser each agree (i) to
conduct its affairs in respect of NEXTBAND in the ordinary course,  (ii) to take
no action that would result in the incurrence of any liability by NEXTBAND,  and
(iii) to take no action  that  would  have any  material  adverse  effect on the
assets  of  NEXTBAND  or the  ability  of  either  of  them  to  consummate  the
transactions  contemplated  hereby.  During  the  period  from  the date of this
Agreement to the Closing Date, (i) NSAC will use its reasonable  best efforts to
preserve  the  Interests  and the LMDS  Licenses  intact,  free and clear of all
restrictions and  encumbrances  created by or through NSAC and (ii) each of NSAC
and the Purchaser will not sell, lease, license,  mortgage or otherwise encumber
or subject to any lien the Interests or the LMDS Licenses.

     4.4.  NOTIFICATION OF CERTAIN MATTERS.  Each party shall give prompt notice
to the other if any of the  following  occur  after the date of this  Agreement:
(i) receipt of any notice or other communication in writing from any third party
alleging  that  the  Consent  of  such  third  party  is or may be  required  in
connection with the transactions  contemplated by this Agreement,  provided that
such Consent would have been required to have been disclosed in this  Agreement;
(ii) receipt of any material notice or other communication from any Governmental
Authority in connection with the transactions contemplated by this Agreement; or
(iii) the commencement of any litigation  involving or affecting NEXTBAND or the
notifying party or any of its subsidiaries,  or any of its properties or assets,
or, to its knowledge,  any employee,  agent,  director or officer, in his or her
capacity as such, of such notifying party or any of its  subsidiaries  which, if
pending on the date hereof,  would have been required to have been  disclosed in
this  Agreement  or  which  relates  to the  consummation  of  the  transactions
contemplated hereby. In addition,  Purchaser shall give prompt written notice to
NSAC of the  occurrence of any event which would be reasonably  likely to have a
Purchaser  Material  Adverse Effect and NSAC shall give prompt written notice to
Purchaser of the  occurrence  of any event which would be  reasonably  likely to
have a NSAC Material Adverse Effect.

     4.5.  REASONABLE BEST EFFORTS.  Subject to the terms and conditions  herein
provided,  Purchaser and NSAC agree to use all reasonable  best efforts to take,
or cause to be taken,  all  actions  and to do, or cause to be done,  all things
necessary,  proper or advisable to consummate  and make effective as promptly as
practicable the transactions contemplated by this Agreement,  including, but not
limited to:

                                      -7-



     (a) making all necessary  applications  and/or filings with the FCC as soon
as  practicable  but in no event  later  than 7 days from the date  hereof,  and
thereafter obtaining FCC approval of the license assignment  contemplated hereby
and any other  Consents from  Governmental  Authorities  and other third parties
required for the consummation of the transactions contemplated hereby; and

     (b) making all necessary  filings under the H-S-R Act within 30 days of the
date hereof.

Upon the terms and subject to the conditions hereof, each of Purchaser and
NSAC shall use its reasonable best efforts to take, or cause to be taken, all
actions and to do, or cause to be done, all things necessary to satisfy the
other conditions of the Closing set forth herein, provided that nothing
contained in this Agreement shall be construed to require Purchaser or NSAC to
accept any term or condition or restriction required or imposed by any
Government Authority in connection with the governmental approvals being sought
for the transactions contemplated hereby, except for any terms, conditions or
restrictions that are of an administrative or ministerial nature. In addition,
each of Purchaser and NSAC will notify the other promptly upon the receipt of
any comments from any government officials and of any request by government
officials for amendments or supplements to any regulatory filing or for
additional information and will promptly supply the other with copies of all
correspondence between such party or any of its representatives, on the one
hand, and the government officials, on the other hand, with respect to the
regulatory filing. Purchaser will not take any action that would cause the last
sentence of Section 3.3 to be untrue at any time prior to the Closing, unless
such action would not (i) result in an adverse effect on Purchaser's
qualifications to be a holder of the LMDS Licenses or (ii) otherwise adversely
affect the consummation of the transactions contemplated hereby.

                                   ARTICLE V.

                              CONDITIONS TO CLOSING

     5.1. CONDITIONS TO EACH PARTY'S OBLIGATIONS.  The respective obligations of
each party to effect the Closing shall be subject to the  fulfillment  or waiver
at or prior to the Closing Date of the following conditions:

     (a) NO INJUNCTION OR ACTION. No order,  statute,  rule,  regulation,  stay,
decree, judgment or injunction shall have been enacted, entered,  promulgated or
enforced  by any  court or  other  Governmental  Authority  which  prohibits  or
prevents the consummation of the transactions  contemplated hereby which has not
been vacated,  dismissed or withdrawn  prior to the Closing Date.  Purchaser and
NSAC  shall use  their  reasonable  best  efforts  to have any of the  foregoing
vacated, dismissed or withdrawn by the Closing Date.

     (b) H-S-R ACT. Any waiting  period (and any  extension  thereof)  under the
H-S-R Act applicable to the  transactions  contemplated by the Agreements  shall
have expired or been terminated.

                                      -8-

 

     (c) FCC  APPROVAL.  The FCC shall have  issued an order  (the "FCC  Order")
approving  the  transfer  of  control  of the  Interests  contemplated  by  this
Agreement, such approval shall be in full force and effect and shall have become
Final (as  hereinafter  defined).  The FCC Order shall have become Final when it
has been issued by the FCC,  when the time for filing any  protest,  request for
stay, petition or request for reconsideration,  petition for rehearing or appeal
or review  thereof (or of any subsequent  decision by any court or  governmental
entity) by or to the FCC or any court or governmental entity having jurisdiction
thereof or the over the premises,  or for the FCC to review or  reconsider  such
Order on its own motion,  shall have expired,  and when no protest,  request for
stay, petition or request for reconsideration,  petition for rehearing or appeal
or review of such Order is pending.

     (d) CONSUMMATION OF WNP INITIAL OFFERING. The Closing shall not be effected
before  the  earlier  of (i) the  date on  which  the WNP  Initial  Offering  is
consummated and (ii) July 1, 1999, provided,  however,  that (A) upon receipt by
NSAC of written notice from Purchaser  stating that in the judgment of Purchaser
the WNP Initial  Offering is not likely to occur on or before July 1, 1999, this
condition shall no longer be applicable and (B) if the WNP Initial  Offering has
not been  consummated  by June 30, 1999, the Closing shall occur on July 1, 1999
(or such later date on which all other conditions to Closing are satisfied).

     5.2.  CONDITIONS TO OBLIGATIONS OF PURCHASER.  The obligations of Purchaser
to purchase  and pay for the  Interests  on the Closing Date shall be subject to
the fulfillment prior thereto of the following additional conditions, any one or
more of which may be waived by Purchaser:

     (a)  PERFORMANCE  BY NSAC.  NSAC shall have performed and complied with all
the covenants and agreements  and satisfied all the conditions  required by this
Agreement to be performed or complied with or satisfied by it at or prior to the
Closing Date,  except for such failures to perform as have not had or would not,
individually or in the aggregate,  have a material adverse affect on NEXTBAND or
materially adversely affect the transactions contemplated hereby.

     (b) ACCURACY OF REPRESENTATIONS  AND WARRANTIES.  The  representations  and
warranties  of NSAC  contained  herein  shall be true and correct  when made and
shall be true and correct as of the Closing Date as though made on and as of the
Closing Date except to the extent that any such  representation and warranty had
by its terms been made as of the date hereof or another  specific date, in which
case such representation and warranty shall have been true and correct as of the
date  hereof  or such  specific  date,  as the  case  may  be),  except,  in all
instances,  where  the  failure  to be so true and  correct  shall  not  result,
individually  or in  the  aggregate,  in a NSAC  Material  Adverse  Effect;  and
Purchaser  shall  have  received  a  certificate  signed on behalf of NSAC by an
authorized officer of NSAC to that effect.

     (c) CERTIFICATES AND OTHER DELIVERIES. NSAC shall have delivered, or caused
to be delivered,  to Purchaser  (i) a  certificate  executed on its behalf by an
authorized  officer  of NSAC to the  effect  that the  conditions  set  forth in
Section  5.2(a) have been  satisfied;  and (ii) duly adopted  resolutions of the
Board of Directors of NSAC approving the execution,  delivery

                                      -9-



and performance of this  Agreement  and  the  instruments contemplated hereby,
certified  by its Secretary.

     (d) NO CONDITIONS.  No Governmental  Authority having jurisdiction over the
approval of the transactions  contemplated hereby shall have imposed or required
any  condition  to such  approval,  except  for any  conditions  that  are of an
administrative or ministerial nature,  except for conditions  resulting from any
action taken by Purchaser or Eagle River Investments  L.L.C. or their respective
controlled or controlling affiliates.

     (e) No Material  Adverse  Change.  There shall not have occurred  after the
date  hereof any event that has had or would  reasonably  be  expected to have a
NSAC Material  Adverse Effect (other than by reason of any action or inaction by
Purchaser or any of its controlled or controlling affiliates).

     5.3. CONDITIONS TO OBLIGATIONS OF NSAC. The obligations of NSAC to sell the
Interests on the Closing Date shall be subject to the fulfillment  prior thereto
of the following additional  conditions,  any one or more of which may be waived
by NSAC:

     (a)  PERFORMANCE BY PURCHASER.  Purchaser shall have performed and complied
with all the covenants and agreements and satisfied all the conditions  required
by this  Agreement to be performed or complied with or satisfied by Purchaser at
or prior to the Closing  Date,  except for such  failures to perform as have not
had or would not,  individually  or in the  aggregate,  have a material  adverse
effect on the transactions contemplated hereby.

     (b) ACCURACY OF REPRESENTATIONS  AND WARRANTIES.  The  representations  and
warranties of Purchaser contained in Sections 3.1 through 3.4 and in Section 3.9
and if, but only if,  Purchaser  shall not have delivered to NSAC an irrevocable
written  election to pay the entire  Remaining  Purchase  Price in cash,  in the
remaining  Sections of Article III (without  giving effect to any materiality or
knowledge  qualifications contained therein) shall be true and correct when made
and shall be true and correct as of the Closing Date as though made on and as of
the Closing Date (except to the extent that any such representation and warranty
had by its terms been made as of the date hereof or another  specific  date,  in
which case such  representation and warranty shall have been true and correct as
of the date hereof or such  specific  date, as the case may be,  except,  in all
instances  other than Section  3.8,  where the failure to be so true and correct
shall not result,  individually  or in the  aggregate,  in a Purchaser  Material
Adverse Effect;  and NSAC shall have received a certificate  signed on behalf of
Purchaser by an authorized officer of Purchaser to such effect.

     (c) CERTIFICATES, LEGAL OPINIONS AND OTHER DELIVERIES. Purchaser shall have
delivered,  or caused to be delivered, to NSAC (i) a certificate executed on its
behalf by an authorized  officer of Purchaser to the effect that the  conditions
set forth in Section 5.3(a) have  have been satisfied; (ii) duly adopted
resolutions of the Board of Directors of Purchaser  approving  the  execution,
delivery and performance  of this Agreement and the  instruments  contemplated
hereby,  each certified by its Secretary; and (iii) if shares of Purchaser
Common Stock are to be delivered to NSAC at the Closing,  an opinion of counsel
to Purchaser,  dated the Closing Date, in form and

                                      -10-



substance reasonably acceptable to NSAC, as to the matters covered by the first
sentence of Section  3.1,  Section 3.2, the first sentence of Section 3.3,
Section 3.4 and Section 3.8.

     (d) REGISTRATION RIGHTS AGREEMENT.  If shares of Purchaser Common Stock are
to be  delivered  to NSAC at the  Closing,  Purchaser  shall have  executed  and
delivered to NSAC a Registration Rights Agreement in the form attached hereto as
Exhibit A.

     (e) NO CONDITIONS.  No Governmental  Authority having jurisdiction over the
approval of the transactions  contemplated hereby shall have imposed or required
any condition to such approval that materially and adversely affects NSAC or, if
shares of Purchaser Common Stock are to be delivered to NSAC at the Closing, the
value of  Purchaser  Common  Stock,  except  for any  conditions  that are of an
administrative  or ministerial  nature or are fully compensated by an assumption
of cost by Purchaser,  and except for conditions resulting from any action taken
by NSAC or any of its controlling or controlled affiliates.

     (f) NO MATERIAL ADVERSE CHANGE.  If shares of Purchaser Common Stock are to
be delivered to NSAC at the  Closing,  no event shall have  occurred on any date
during the period beginning at the commencement of the twenty trading day period
referred  to in  Section  1.2 and  ending on the day  before  the  Closing  Date
(whether  or not a Purchaser  Blackout  has  occurred)  that has had a Purchaser
Material Adverse Effect.

     (g) EAGLE  RIVER  WAIVER  OF  PIGGYBACK  RIGHTS.  Eagle  River  Investments
L.L.C.'s waiver of its piggyback  registration  rights and holdback agreement in
connection  with the Initial  Offering  (as that term is defined in the WNP RRA)
shall  remain in full force and effect and such waiver  shall have been  amended
and  supplemented  to apply in connection  with the initial demand  registration
requested by NSAC pursuant to the NSAC Registration Rights Agreement.

                                   ARTICLE VI.

                        INDEMNIFICATION AND REIMBUREMENT

     6.1. INDEMNIFICATION BY THE PARTIES.

     (a) In order to induce each of the parties to enter into this Agreement and
to  consummate  the  transactions  contemplated  hereby,  each of  NSAC  and the
Purchaser  (each,  in its capacity as indemnitor  hereunder,  the  "Indemnifying
Party") shall,  subject to the further  provisions of this Article VI, indemnify
the other party and, without duplication, its stockholders,  directors, officers
and  employees  (collectively,  the  "Indemnified  Parties")  and shall hold the
Indemnified  Parties  harmless  against and with respect to any "Loss" which for
purposes of this Agreement shall include any and all actual liabilities,  costs,
losses, damages and expenses (whether or not arising out of third party claims),
including without limitation  reasonable attorneys' fees (after giving effect to
any  offsetting  benefit  actually  received  or  receivable),  incurred  by the
Indemnified Parties and arising out of or resulting from:

                                      -11-



          (i) any  misrepresentation  or breach of warranty by the Indemnifying
      Party of any of its  representations  or warranties set forth in the
      Agreements or any Exhibit thereto; and

          (ii) any breach or nonfulfillment  by the Indemnifying  Party of any
      of its covenants,  agreements or other  obligations  set forth in the
      Agreements or any Annex, Schedule or Exhibit thereto.

     (b)  Entitlement to  indemnification  pursuant to this Section 6.1 shall be
conditioned  upon claims in respect  thereof  being  submitted  in writing  with
detailed  specification showing the basis of such claim, including the provision
of this Agreement breached,  and a reasonably detailed calculation of the amount
of such claim,  if at all, by the relevant  Indemnified  Parties to the relevant
Indemnifying Party no later than twelve (12) months after the Closing Date.

     (c) Notwithstanding anything to the contrary in this Section 6.1, the right
to indemnity in respect of matters provided for in paragraphs (a)(i) and (ii) of
this  Section  6.1 shall not be barred on the basis that the amount of the claim
has not been  ascertained,  liquidated or reduced to final judgment on or before
the expiration of the aforesaid  period,  provided that such claim is identified
in  writing  with  detailed  specification  showing  the  basis  of such  claim,
including the provision of this Agreement breached, and a reasonable estimate of
the amount of such claim.

     (d) The  remedies  provided in this Article VI and in Section 7.12 shall be
the relevant  Indemnified  Parties' sole  remedies  hereunder for breach of this
Agreement, except in the case of fraud.

     6.2.  Claims for  Reimbursement.  In the event that any  Indemnified  Party
suffers any Loss (as hereinabove defined) with respect to any liability or claim
to which the foregoing  indemnities  relate, such Person shall give the relevant
Indemnifying  Party prompt  written notice of the nature and amount of such Loss
and the Indemnified Party's claim for reimbursement therefor and if such Loss is
with respect to a third party claim, accompanied by a copy of the written notice
from the third party claimant. The Indemnified Party shall have 30 days from the
date of said notice to investigate and dispute the nature, validity or amount of
any such claim.  During said 30-day period,  representatives of one law firm and
one  accounting  firm  designated by the relevant  Indemnified  Party shall have
reasonable access, during normal business hours, to the books and records of the
Indemnified Party for the purpose of such  investigation.  In the event that the
relevant  Indemnifying  Party  disputes  the nature,  validity or amount of said
claim, such relevant Indemnifying Party shall give the Indemnified Party written
notice of such dispute within said 30-day period,  and the parties shall attempt
in good faith to resolve such dispute. If such dispute is not resolved within 10
days following  receipt of said notice of dispute by the Indemnified  Party, the
provisions of Section 6.5 hereof shall apply to such dispute.

     In the absence of a dispute, the relevant Indemnifying Party shall promptly
(but  not  later  than the  expiration  of said  30-day  period)  reimburse  the
Indemnifying  Party for such Loss.  In the event that the  relevant  Indemnified
Party  disputes only the amount of the claim,  the relevant  Indemnifying  Party
shall,  concurrently  with the  delivery  of its notice of  dispute,  pay to

                                      -12-



the Indemnified  Party the  undisputed  portion of such claim and the
provisions of Section 6.5 hereof shall apply to the disputed portion of such
claim.

     All payments by the Purchaser  under this Article VI shall be in cash.  All
payments by NSAC hereunder may, at NSAC's discretion,  be paid either in cash or
in shares of Purchaser  Common Stock, to the extent NSAC received such shares of
Purchaser Common Stock at the Closing  hereunder.  If NSAC wishes to satisfy all
or any portion of an  acknowledged  liability  hereunder  in shares of Purchaser
Common  Stock,  such  shares  shall be valued at their  Volume-Weighted  Average
Trading Price for the twenty  trading day period ending on the date prior to the
Closing Date hereunder.

     6.3.  LIMITATIONS ON INDEMNIFICATION.  (a) Notwithstanding  anything to the
contrary in this Article VI, no Indemnifying Party will be obligated to make any
payment in connection with its indemnity  obligation under this Article VI until
Losses suffered or incurred by any one or more Indemnified  Parties to whom that
Indemnifying Party has an indemnity  obligation under this Article VI exceed, in
the  aggregate,  $50,000.  But  once  such  Losses  exceed  $50,000,  then  such
Indemnified   Parties   will  be  entitled  to  recover  all  Losses  from  that
Indemnifying Party up to a maximum account of $137,700,000  (including the value
of shares of  Purchaser  Common  Stock as  calculated  above,  in the event such
shares are used by NSAC as permitted above to pay any indemnification obligation
hereunder).

     6.4. DEFENSE OF THIRD-PARTY CLAIMS. If any lawsuit or enforcement action is
filed, or claim asserted  against an Indemnified  Party by a third party and the
Indemnified  Party is entitled to  indemnification  pursuant to this  Agreement,
written  notice  thereof  shall be given to the relevant  Indemnifying  Party as
promptly  as  practicable  (and in any  event no later  than 30 days  after  the
service of the  citation or summons or receipt of other  written  notice of such
claim);  the failure of any Indemnified  Party to give timely notice shall limit
the rights to indemnification  hereunder only if and to the extent that (i) such
failure to give  timely  notice  materially  affects the ability or right of the
relevant  Indemnifying  Party to  participate  in the defense of such lawsuit or
enforcement  action or claim,  (ii) actual  notice is not given to the  relevant
Indemnifying  Party within a reasonable  time,  or (iii) to the extent that such
failure to give timely  notice causes the relevant  Indemnifying  Party to incur
additional  expense  with  respect to such lawsuit or  enforcement  action,  the
Indemnified Party fails to promptly  reimburse the relevant  Indemnifying  Party
for such additional expense.

     The relevant Indemnifying Party shall be entitled, if it so elects, to take
control of the defense and  investigation of such lawsuit,  action or claim, and
to employ and engage  attorneys of its own choice to handle and defend the same,
at  the  relevant   Indemnifying  Party's  cost,  risk  and  expense;  and  such
Indemnified Party shall cooperate in all reasonable respects,  at its cost, risk
and expense,  with the  relevant  Indemnifying  Party and such  attorneys in the
investigation,  trial and  defense  of such  lawsuit  or action  and any  appeal
arising therefrom; provided, however, that the Indemnified Party may, at its own
cost, participate in (but not control) such investigation,  trial and defense of
such lawsuit or action and any appeal arising therefrom.

                                      -13-



     If the  relevant  Indemnifying  Party does not elect to take control of the
defense and investigation of said lawsuit or action,  then the Indemnified Party
shall remain in control thereof in such manner as it deems appropriate.

     Neither party shall enter into any settlement,  adjustment or compromise of
any lawsuit or action without the prior written consent of the other party which
consent will not be unreasonably withheld.

     6.5. RESOLUTION OF DISPUTES.

     (a) In the event of any dispute  between  Purchaser and NSAC over any claim
for reimbursement with respect to any matter to which the foregoing  indemnities
relate,  such  dispute will be finally  determined  by the  Accounting  Firm (as
defined  below) in the  manner  set  forth in  Section  6.5(b),  and any Loss so
determined will be promptly reimbursed to the appropriate Indemnified Parties by
the appropriate Indemnifying Party.

     (b) Any dispute  pursuant to Section 6.5(a) will be resolved by a member of
the Washington,  D.C. office of an accounting firm jointly  selected by NSAC and
Purchaser (the  "Accounting  Firm").  The Accounting Firm shall be instructed to
use all reasonable efforts to resolve such disputes within thirty (30) days. The
resolution of disputes by the  Accounting  Firm so selected will be set forth in
writing and will be conclusive  and binding upon all parties to such dispute and
the amount of the  reimbursement  payable as so resolved  will become  final and
binding  upon  the  date  of such  resolution.  The  fees  and  expenses  of the
Accounting Firm shall be paid by the unsuccessful party, if all the disputes are
resolved  against  such  party,  and in other cases shall be pro rated among the
parties as the  Accounting  Firm sees fit based on the  relative  success of the
parties in indicating their respective positions.

                                  ARTICLE VII.

                                  MISCELLANEOUS

     7.1. AMENDMENT AND MODIFICATION. This Agreement may be amended, modified or
supplemented only by a written agreement among each of the parties hereto.

     7.2.  TERMINATION.  This Agreement may be terminated  and the  transactions
contemplated hereby may be abandoned at any time prior to the Closing Date:

     (a) by the mutual written consent of Purchaser and NSAC; or

     (b) by  Purchaser  or NSAC if on the  Closing  Date  any  condition  to the
transactions  contemplated  hereby has not been satisfied or waived by the party
or parties  entitled to the  benefit of the same;  provided,  however,  that the
right to terminate this  Agreement  pursuant to this Section 7.2(b) shall not be
available  to any party whose  failure to perform any of its  obligations  under
this  Agreement  results  in the  failure  of any  such  other  condition  to be
satisfied; or

                                      -14-



     (c) by  Purchaser  or NSAC if the  Closing  shall not have  occurred  on or
before  January 14, 2000;  provided,  however,  that the right to terminate this
Agreement  pursuant to this  Section  7.2(c) shall not be available to any party
whose failure to perform any of its obligations  under this Agreement results in
the failure of the Closing to occur by such date; or

     (d) by Purchaser or NSAC if any court of  competent  jurisdiction  or other
Governmental  Authority has issued an order, decree or ruling or taken any other
action  restraining,   enjoining  or  otherwise   prohibiting  the  transactions
contemplated  hereby and such order,  decree,  ruling or other action shall have
become final and nonappealable; or

     (e) by either  Purchaser  or NSAC upon  written  notice to the other if the
terminating  party is not in  material  breach  of its  obligations  under  this
Agreement  and if the  other  party  or its  subsidiary  shall  have  materially
breached  this  Agreement  and such  breach  shall  not have  been  cured in all
material respects or waived prior to the earlier to occur of the Closing Date or
thirty (30) days following the date the  terminating  party shall have given the
other party written  notice of such breach  setting forth the nature  thereof in
reasonable detail.

     7.3.  EFFECT  OF  TERMINATION.  In the  event  of the  termination  of this
Agreement  pursuant to Section 7.2, this Agreement shall  forthwith  become void
and have no  effect,  without  any  liability  on the  part of any  party or its
directors,  officers or stockholders,  except for the provisions of this Section
7.3, which shall survive any such termination. Nothing contained in this Section
7.3 shall relieve any party from liability for any breach of this Agreement.

     7.4.  SURVIVAL.  All  representations,  warranties  and  covenants  in this
Agreement or in any  certificate  delivered  pursuant to this Agreement shall be
considered  to have  been  relied  upon by the  Parties  and shall  survive  the
Closing.

     7.5. NOTICES.  All notices and other  communications  hereunder shall be in
writing and shall be deemed to have been duly given when delivered in person, by
facsimile, receipt confirmed, or on the next business day when sent by overnight
courier  or on the third  succeeding  business  day when sent by  registered  or
certified mail (postage  prepaid,  return  receipt  requested) to the respective
parties at the  following  addresses  (or at such other  address  for a party as
shall be specified by like notice):

                  (i)  if to NSAC, to:

                                    Nextel Spectrum Acquisition Corp.
                                    c/o Nextel Communications, Inc.
                                    1505 Farm Credit Drive
                                    McLean, Virginia 22101
                                    Attention:  General Counsel
                                    Fax:  (703) 394-3896

                                    with a copy to:

                                      -15-



                                    Jones, Day, Reavis & Pogue
                                    41 S. High Street, Suite 1900
                                    Columbus, Ohio 43215
                                    Attention:  Gregory A. Gorospe, Esq.
                                    Fax:  (614) 461-4198

                                    and

                  (ii)  if to Purchaser, to:

                                    NEXTLINK Communications, Inc.
                                    500 108th Avenue, NE, Suite 2200
                                    Bellevue, Washington 98004
                                    Attention:  R. Bruce Easter, Jr., Esq.
                                    Fax:  (425) 519-8997

                                    with a copy to:

                                    Willkie Farr & Gallagher
                                    787 Seventh Avenue
                                    New York, New York  10019
                                    Attention:  Bruce R. Kraus, Esq.
                                    Fax:  (212) 728-8111


     7.6. BINDING EFFECT;  ASSIGNMENT.  This Agreement and all of the provisions
hereof shall be binding upon and inure to the benefit of the parties  hereto and
their respective  successors and permitted  assigns.  Neither this Agreement nor
any of the  rights,  interests  or  obligations  hereunder  shall be assigned by
either of the parties hereto without the prior written consent of the other.

     7.7. EXPENSES.

     (a) The parties to this Agreement shall, except as otherwise  specifically
provided herein,  bear their respective expenses incurred in connection with the
preparation,  execution and  performance of this Agreement and the  transactions
contemplated hereby, whether or not the transactions are consummated, including,
without limitation, all fees and expenses of their respective agents.

     (b) The  prevailing  party in any legal action  undertaken  to enforce this
Agreement  or any  provision  hereof shall be entitled to recover from the other
party the costs and expenses  (including  attorneys'  and expert  witness  fees)
incurred in connection with such action.

                                      -16-



     7.8.  GOVERNING LAW. This  Agreement  shall be governed by and construed in
accordance  with the laws of the State of New York  applicable to contracts made
and to be performed entirely within such State.

     7.9.  COUNTERPARTS.   This  Agreement  may  be  executed  in  one  or  more
counterparts,  each of  which  shall be  deemed  an  original,  but all of which
together shall constitute one and the same instrument.

     7.10.  INTERPRETATION.  The article and section headings  contained in this
Agreement are solely for the purpose of reference, are not part of the agreement
of the parties and shall not in any way affect the meaning or  interpretation of
this Agreement. As used in this Agreement, (i) the term "Person" shall mean and
include an individual, a partnership,  a joint venture, a corporation, a limited
liability company, a trust, an association,  an unincorporated  organization,  a
Governmental  Authority and any other entity, (ii) unless  otherwise  specified
herein, the term "affiliate," with respect to any person, shall mean and include
any person  controlling,  controlled by or under common control with such person
and (iii) the term  "subsidiary"  of  any  specified  person  shall  mean  any
corporation 50 percent or more of the outstanding voting power of which, or any
partnership, joint venture, limited liability company or other entity 50 percent
or more of the total equity interest of which,  is directly or indirectly  owned
by such specified person.

     7.11.  ENTIRE  AGREEMENT.  This  Agreement and the documents or instruments
referred to herein including,  but not limited to, the Exhibits attached hereto,
which are  incorporated  herein by  reference,  embody the entire  agreement and
understanding  of the parties hereto in respect of the subject matter  contained
herein.  There  are  no  restrictions,  promises,  representations,  warranties,
covenants, or undertakings,  other than those expressly set forth or referred to
herein.  This Agreement  supersedes all prior agreements and the  understandings
between the parties with respect to such subject matter.

     7.12.  SPECIFIC  PERFORMANCE.  The parties  hereto  agree that  irreparable
damage  would occur in the event that any of the  provisions  of this  Agreement
were not performed in accordance  with their  specific  terms or were  otherwise
breached.  Accordingly,  the  parties  further  agree that each  party  shall be
entitled  to an  injunction  or  restraining  order to prevent  breaches of this
Agreement and to enforce  specifically  the terms and  provisions  hereof in any
court of the  United  States or any state  having  jurisdiction,  this  being in
addition to any other right or remedy to which such party may be entitled  under
this Agreement, at law or in equity.

     7.13.  THIRD  PARTIES.  Nothing  contained  in  this  Agreement  or in  any
instrument or document executed by any party in connection with the transactions
contemplated  hereby  shall  create  any  rights  in,  or be deemed to have been
executed for the benefit of, any person that is not a party hereto or thereto or
a successor or permitted assign of such a party; provided,  that any Indemnified
Party  shall be  entitled to the rights and  benefits  accorded  to  Indemnified
Parties pursuant to the terms of Article VI hereof.

                                      -17-



     IN WITNESS  WHEREOF,  Purchaser  and NSAC have caused this  Agreement to be
signed  and  delivered  by  their  respective  duly  authorized   officers,   as
applicable, as of the date first above written.

                                           NEXTLINK COMMUNICATIONS, INC.



                                          By: /s/ R. Bruce Easter
                                              ----------------------
                                              Name: R. Bruce Easter, Jr.
                                              Title: Vice President 



                                            NEXTEL SPECTRUM ACQUISITION CORP.



                                            By: /s/ Thomas J. Sidman
                                                ------------------------
                                                Name: Thomas J. Sidman
                                                Title: Vice President
                                      -18-