Document:

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                                                                   EXHIBIT 10.38

                               RETENTION AGREEMENT

                  This Agreement (this "Agreement") is made as of the 22nd day
of December, 2000, between Deutsche Telekom AG, an AKTIENGESELLSCHAFT organized
and existing under the laws of the Federal Republic of Germany ("Deutsche
Telekom"), and VoiceStream Wireless Corporation, a Delaware corporation
("VoiceStream").

                                WITNESSETH THAT:

                  WHEREAS, Deutsche Telekom and VoiceStream are parties to an
Agreement and Plan of Merger dated as of July 23, 2000 as amended and restated
on September 28, 2000 (the "Merger Agreement");

                  WHEREAS, in connection with the negotiation and execution of
the Merger Agreement, the parties engaged in significant discussions regarding
the establishment and implementation of retention arrangements and, in
particular, the establishment of an equity incentive plan, to motivate senior
management employees of VoiceStream and its subsidiaries (including key
personnel and key managers as such terms are used in the VoiceStream Option Plan
(as defined herein)) to continue employment with VoiceStream and its
subsidiaries or their respective successors following the consummation of the
transactions contemplated by the Merger Agreement;

                  WHEREAS, in recognition of the importance to the parties of
the establishment and implementation of retention arrangements, the parties
agreed pursuant to Section 5.19(d) of the Merger Agreement that, during the
sixty-day period following the date of execution of the original Merger
Agreement (the "Merger Agreement Date"), they would seek to develop a mutually
acceptable retention plan for senior management employees of VoiceStream and its
subsidiaries (including key personnel and key managers as such terms are used in
the VoiceStream Option Plan) with the intention that such retention arrangement
would include an equity incentive component in respect of DT Ordinary Shares;

                  WHEREAS, the parties have agreed to extend such sixty-day
period to December 22, 2000;

                  WHEREAS, VoiceStream currently maintains the VoiceStream
Management Incentive Stock Option Plan (the "VoiceStream Option Plan") to
provide an incentive to senior management employees of VoiceStream and its
subsidiaries (including key personnel and key managers as such terms are used in
the VoiceStream Option Plan) to remain in the employ of VoiceStream or its
subsidiaries;

                  WHEREAS, pursuant to Section 5.19(d) of the Merger Agreement,
the parties have agreed that following the Closing, Deutsche Telekom shall, as
agreed upon with VoiceStream prior to the Closing, make such amendments as are
necessary to modify the VoiceStream Option Plan to permit the issuance of
options to purchase DT Ordinary Shares (the "Retention Options") following the
Closing to senior management employees of VoiceStream and its subsidiaries
(including key personnel and key managers as such terms are used in the

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VoiceStream Option Plan) pursuant to the general terms and conditions of the
VoiceStream Option Plan, as amended from time to time by Deutsche Telekom;

                  WHEREAS, to effectuate the foregoing, the parties have agreed
that effective as of the Closing Date, Deutsche Telekom will establish a Trust
(as described in Section 2 of this Agreement) to issue Retention Options during
the period beginning on the Closing Date and continuing through December 31,
2004;

                  WHEREAS, as partial consideration for the contribution by the
Surviving Corporation of the Surviving Corporation Common Stock to the Escrow
Agent and the delivery by the Escrow Agent of such Surviving Corporation Common
Stock to Deutsche Telekom, VoiceStream and Deutsche Telekom have agreed in
accordance with the Merger Agreement that 8,000,000 DT Ordinary Shares be issued
and placed in a Trust (as described in Section 2 of this Agreement) for the
purpose of satisfying the obligations created by the issuance of the Retention
Options.

                  NOW, THEREFORE, further to Section 5.19(d) of the Merger
Agreement and in order to provide an incentive to the key management employees
of VoiceStream and its subsidiaries (including key personnel and key managers as
such terms are used in the VoiceStream Option Plan) for the continued dedication
of such employees, and for other good and valuable consideration, Deutsche
Telekom and VoiceStream hereby agree as follows:

                  1. Certain Definitions. All capitalized terms used and not
defined herein shall have the meaning assigned to such terms in the Merger
Agreement.

                  2. Establishment of Trust. On the Closing Date, as soon as
possible after the Effective Time, in order to fulfill the obligations set forth
herein, Deutsche Telekom shall issue 8,000,000 DT Ordinary Shares as partial
consideration for the contribution by the Surviving Corporation of the Surviving
Corporation Common Stock to the Escrow Agent and the delivery by the Escrow
Agent of such Surviving Corporation Common Stock to Deutsche Telekom. Such DT
Ordinary Shares shall be transferred to and held in a U.S. trust pursuant to a
form of trust agreement to be mutually agreed upon, the terms and conditions of
which shall be consistent with the terms and conditions of the Option Trust
described in Annex 1.08(a) of the Merger Agreement (the "Trust") and used solely
to satisfy the obligations pursuant to the exercise of the Retention Options. In
the event of any corporate transaction involving the DT Ordinary Shares,
including without limitation a stock split, stock dividend, spin-off, merger or
reorganization, the number and kind of shares in the Trust shall be
appropriately and equitably adjusted. These 8,000,000 DT Ordinary Shares are in
addition to the DT Ordinary Shares that will be delivered to the Options Trust
pursuant to Section 1.08 of the Merger Agreement. The options described in
Sections 4 and 5 of this Agreement shall be encompassed by the provisions of
Section 1.08 of the Merger Agreement.

                  3. Continuation of VoiceStream Plan. In connection with the
Closing, Deutsche Telekom shall, as agreed upon with VoiceStream prior to the
Closing, make such amendments as are necessary to modify the VoiceStream Option
Plan to permit the issuance of the Retention

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Options. For the period beginning on the Closing Date and continuing through
December 31, 2004, Deutsche Telekom shall cause the Trust to issue Retention
Options to senior management employees of VoiceStream and its subsidiaries
(including key personnel and key managers as such terms are used in the
VoiceStream Option Plan) substantially on the terms set forth in the VoiceStream
Option Plan, as amended from time to time by Deutsche Telekom.

                  4. Additional Option Grants. Pursuant to Section 5.19(d) of
the Merger Agreement, Deutsche Telekom and VoiceStream have agreed that
VoiceStream may grant at any time after the Merger Agreement Date to 31 managers
a number of VoiceStream options (the "Additional Options") equal to the unvested
VoiceStream options held by such managers as of the Merger Agreement Date that
provide by their terms for accelerated vesting upon a change of control of
VoiceStream (other than the portion of those options that would vest in the
ordinary course following the Merger Agreement Date and prior to May 31, 2001)
(the "Unvested Options"). The Additional Options shall have the same terms and
conditions, including exercise price and continuing vesting schedule, as the
outstanding Unvested Options with respect to which they are granted, except that
such Additional Options will not vest on a change of control of VoiceStream or
any of its successors. A maximum of 574,368 Additional Options may be granted
under this provision, and such Additional Options shall not reduce the amount of
options VoiceStream is otherwise permitted to grant, pursuant to Section 4.01(a)
of the Merger Agreement, prior to the Closing. In exchange for the grant of
Additional Options, the optionee will be required to waive change of control
vesting of the optionee's existing options in connection with any change of
control of VoiceStream or any of its successors, but such options will continue
to vest pursuant to their terms. In the event that an optionee's employment is
terminated by the optionee's employer without cause or due to a reduction in
force, due to the optionee's death or disability or by the optionee as a result
of a constructive termination (reduction in pay), all of the remaining Unvested
Options shall become vested and exercisable (and any unvested Additional Options
will vest only if otherwise provided in the applicable award agreement or any
other applicable agreement between VoiceStream and the optionee).
Notwithstanding the foregoing, if the optionee's employment terminates for any
reason other than as set forth in the preceding sentence, except as provided in
any applicable agreement between VoiceStream and the optionee, all Unvested
Options (and any unvested Additional Options) shall be terminated.

                  5. Other Options. DT acknowledges that pursuant to Section
4.01(a) of the Merger Agreement, VoiceStream will be permitted to grant to its
directors, officers and employees up to 1,500,000 options in addition to the
Additional Options prior to Closing.

                  6. Retention Program. DT acknowledges that VoiceStream shall
be permitted to provide a retention program to its employees in an amount up to
$100 million pursuant to the terms of Schedule 4.01(e) of the Merger Agreement.

                  7. Modification; Waiver. No provisions of this Agreement may
be modified, waived or discharged unless such waiver, modification or discharge
is agreed to in a writing signed by each of the parties hereto. Waiver by any
party of any breach of or failure to comply with any provision of this Agreement
by the other party shall not be construed as, or constitute, a

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continuing waiver of such provision, or a waiver of any other breach of, or
failure to comply with, any other provision of this Agreement.

                  8. Notice. All notices and other communications given or made
pursuant hereto shall be in writing and shall be deemed to have been duly given
or made as of the date of receipt and shall be delivered personally or mailed by
registered or certified mail (postage prepaid, return receipt requested), sent
by overnight courier or sent by telecopy, to the parties at the following
addresses or telecopy numbers (or at such other address or telecopy number for a
party as shall be specified by like notice):

                  if to VoiceStream:
                  VoiceStream Wireless Corporation
                  12920 SE 38th Street
                  Bellevue, Washington  98006
                  Attention:  Alan R. Bender
                  Facsimile:  425-586-8080

                  with a copy to:

                  Wachtell, Lipton, Rosen & Katz
                  51 West 52nd Street
                  New York, New York  10019
                  Attention: Michael Katzke
                  Facsimile: 212-403-2000

                  if to Deutsche Telekom:
                  Deutsche Telekom AG
                  140 Friedrich-Ebert Allee
                  53113 Bonn
                  Germany
                  Attention:  Kevin Copp
                  Facsimile:  49-228-181-44177

                  with a copy to:

                  Cleary, Gottlieb, Steen & Hamilton
                  One Liberty Plaza
                  New York, New York  10006
                  Attention:  A. Richard Susko
                  Facsimile:  212- 225-3999

                  and a copy to

                  Hengeler Mueller
                  Trinkausstrasse 7

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                  D-40213 Dusseldorf
                  Germany
                  Attention:  Rainer Krause or Maximilian Schiessl

                  9. Severability. If any term or provision of this Agreement or
the application thereof to any person or circumstance shall to any extent be
invalid or unenforceable, the remainder of this Agreement or the application of
such term or provision to persons or circumstances other than those as to which
it is held invalid or unenforceable shall not be affected thereby, and each term
and provision of this Agreement shall be valid and enforceable to the fullest
extent permitted by law.

                  10. Headings. The headings in this Agreement are inserted for
convenience of reference only and shall not be a part of or control or affect
the meaning of this Agreement.

                  11. Counterparts. This Agreement may be executed in several
counterparts, each of which shall be deemed an original.

                  12. Governing Law. This Agreement has been executed and
delivered in the State of New York and shall in all respects be governed by, and
construed and enforced in accordance with, the laws of the State of New York,
without reference to its principles of conflicts of law.

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                  IN WITNESS WHEREOF, the parties have executed this Agreement
as of the date first written above.

                                        DEUTSCHE TELEKOM AG

                                        /s/     Jeffrey Hedberg
                                        ------------------------------
                                        By:     Jeffrey Hedberg
                                        Title:  Member of the Board of
                                                Management, International

                                        VOICESTREAM WIRELESS CORPORATION

                                        /s/     John Stanton
                                        ------------------------------
                                        By:     John Stanton
                                        Title:  Chairman of the Board and
                                                Chief Executive Officer
                                                (Principal Executive Officer)

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                                                                   Exhibit 10.39

                           VOTING AND LOCKUP AGREEMENT

                  This Voting and Lockup Agreement (this "Agreement") dated as
of December 14, 2000 between the stockholder listed on the signature page hereto
("Stockholder") and Deutsche Telekom AG, an Aktiengesellschaft organized and
existing under the laws of the Federal Republic of Germany ("Purchaser").

                  1.       Certain Definitions. (a) For the purposes of this
Agreement, the following capitalized terms used shall have the respective
meanings given to such terms as follows:

                  "Affiliate" of a person means a Person that directly or
indirectly, through one or more intermediaries, controls, is controlled by, or
is under common control with, the first mentioned Person.

                  "Merger Agreement" means that certain Agreement and Plan of
Merger by and among Purchaser, Bega, Inc. and Target dated as of July 23, 2000,
as amended and restated on September 28, 2000.

                  "Person" means an individual, corporation, partnership,
limited liability company, joint venture, association, joint stock company,
trust, unincorporated organization, entity or group (as defined in the
Securities Exchange Act of 1934, as amended) or a governmental or regulatory
authority.

                  "Record Date" means the record date established for the Target
Stockholders' Meeting.

                  "Registration Statement" means one or more registration
statements to be filed with the Securities and Exchange Commission by Purchaser
in connection with the issuance of its securities in the Merger.

                  "Rights" means any warrants, options or other rights to
acquire or receive shares of Target Common Stock or other voting capital stock
of Target.

                  "Shares" means any shares of Target Common Stock.

                  "Subsequent Determination" means a determination by the Board
of Directors of Target not to recommend the approval and adoption of the Merger
Agreement by holders of Target Common Stock.

                  "Subsidiary" means any Person on the date of determination of
which Target or Purchaser, as the case may be (either alone or through or
together with any other Subsidiary or Subsidiaries), owns, directly or
indirectly, more than fifty percent (50%) of the stock or other equity interests
the holders of which are generally entitled to vote for the election of the
Board of Directors or other governing body of such Person.

                  "Target" means VoiceStream Wireless Corporation, a Delaware
corporation.
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                  "Target Common Stock" means a share of common stock, par value
$0.001 per share, of Target.

                  "Target Stockholders' Meeting" means a meeting of the
stockholders of Target duly convened under Delaware Law following the
effectiveness of the Registration Statement for the purposes of obtaining
approval by the holders of Target Shares of the transactions contemplated by the
Merger Agreement.

                  "Total Number of Shares" has the meaning set forth in Section
2(c).

                  "Transfer" means, with respect to any security, the sale,
transfer, pledge, hypothecation, encumbrance, assignment or constructive sale or
other disposition of such security or the record or beneficial ownership
thereof, the offer to make such a sale, transfer, constructive sale or other
disposition, and each agreement, arrangement or understanding, whether or not in
writing, to effect any of the foregoing. The term "constructive sale" means a
short sale with respect to such security, entering into or acquiring an
offsetting derivative contract with respect to such security, entering into or
acquiring a futures or forward contract to deliver such security or entering
into any transaction that has substantially the same effect as any of the
foregoing; provided, however, that the term "constructive sale" shall not
include transactions involving the purchase and sale of securities tracking a
broad-based stock index excluding the DAX Index.

                  (b)      For the purposes of this Agreement, the words
"beneficially owned" or "beneficial ownership" shall include, with respect to
any securities, the beneficial ownership by Stockholder and by any direct or
indirect Subsidiary of Stockholder.

                  (c)      All other capitalized terms used but not defined
herein shall have the meanings ascribed to them in the Merger Agreement.

                  2.       Restriction on Transfer; Other Restrictions.

                  (a)      Stockholder agrees not to Transfer or agree to
Transfer any Shares or Rights owned of record or beneficially by Stockholder,
except as otherwise permitted by this Section 2 or pursuant to the Merger
Agreement or Transfers to any Affiliate of Stockholder who agrees in writing to
be bound by the terms of this Agreement, other than with Purchaser's prior
written consent.

                  (b)      From the date hereof until the earlier of January 1,
2001 and the date of the Target Stockholders' Meeting or, if sooner, the
termination of the Merger Agreement, Stockholder may Transfer only up to 49.9%
of Stockholder's Total Number of Shares.

                  (c)      For purposes of Section 2(b), Stockholder's "Total
Number of Shares" is equal to the aggregate number of shares of Target Common
Stock owned of record or beneficially by the Stockholder as a result of the
exercise of exchange rights to acquire shares of Target Common Stock after July
1, 2000.

                  (d)      Stockholder hereby irrevocably waives any rights of
appraisal or rights to dissent from the Merger that Stockholder may have.

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                  3.       Agreement to Vote. (a) Stockholder hereby irrevocably
and unconditionally agrees to vote or to cause to be voted or provide a consent
with respect to all Shares that it owns of record or beneficially as of the
Record Date at the Target Stockholders' Meeting and at any other annual or
special meeting of stockholders of Target or action by written consent where
such matters arise (i) in favor of the Merger and the Merger Agreement and
approval of the terms thereof and (ii) against, and Stockholder will not consent
to, approval of any Alternative Transaction or the liquidation or winding up of
Target. The obligations of Stockholder specified in this Section 3 shall apply
whether or not the Board of Directors of Target makes a Subsequent
Determination.

                  (b)      In furtherance of the agreements contained in Section
3(a) hereof, Stockholder hereby agrees (i) to complete and send the proxy card
received by Stockholder with the Target Proxy Statement, so that such proxy card
is received by Target, as prescribed by the Target Proxy Statement, not later
than the fifth Business Day preceding the day of the Target Stockholders'
Meeting, (ii) to vote, by completing such proxy card but not otherwise, all the
Shares he or it owns of record or beneficially as of the record date for the
Target Stockholders' Meeting (A) in favor of the Merger and the Merger Agreement
and (B) if the opportunity to do so is presented to such Stockholder on the
proxy card, against any Alternative Transaction and (iii) not to revoke any such
proxy.

                  4.       Miscellaneous.

                  (a)      Execution in Counterparts. This Agreement may be
executed in counterparts, each of which shall be an original with the same
effect as if the signatures hereto and thereto were upon the same instrument.

                  (b)      Specific Performance. Stockholder agrees with
Purchaser as to itself that if for any reason Stockholder fails to perform any
of its agreements or obligations under this Agreement, irreparable harm or
injury to Purchaser would be caused as to which money damages would not be an
adequate remedy. Accordingly, Stockholder agrees that, in seeking to enforce
this Agreement against Stockholder, Purchaser shall be entitled, in addition to
any other remedy available at law, equity or otherwise, to specific performance
and injunctive and other equitable relief. The provisions of this Section 4(b)
are without prejudice to any other rights or remedies, whether at law or in
equity, that Purchaser may have against Stockholder for any failure to perform
any of its agreements or obligations under this Agreement.

                  (c)      Amendments; Termination.

                           (i)      This Agreement, including this Section 4(c),
may not be modified, amended, altered or supplemented, except upon the execution
and delivery of a written agreement executed by the parties hereto.

                           (ii)     The provisions of this Agreement shall
terminate upon the earliest to occur of (A) the consummation of the Merger, (B)
the termination of the Merger Agreement, and (C) except for Section 3 of this
Agreement, January 1, 2001.

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                  (d)      Governing Law; Submission and Jurisdiction.

                           (i)      This Agreement shall be governed by and
construed in accordance with the laws of the State of Delaware without giving
effect to the principles of conflicts of laws interest.

                           (ii)     Each of the parties hereto irrevocably
agrees that any legal action or proceeding with respect to this Agreement or for
recognition and enforcement of any judgment in respect hereby brought by the
other party hereto or its successors or assigns shall be brought and determined
only in the United States District Court for the State of Delaware or, in the
event (but only in the event) that such court does not have subject matter
jurisdiction over such action or proceeding, in the courts of the State of
Delaware. Each of the parties hereto hereby irrevocably submits with regard to
any such action or proceeding for itself and in respect of its property,
generally and unconditionally, to the personal jurisdiction of the aforesaid
courts. Each of the parties hereto hereby irrevocably waives, and agrees not to
assert, by way of motion, as a defense, counterclaim or otherwise, in any action
or proceeding with respect to this Agreement, (A) any claim that it is not
personally subject to the jurisdiction of the above-named courts for any reason
other than the failure to serve in accordance with this Section 4(d)(ii) or that
it or its property is exempt or immune from jurisdiction of any such court or
from any legal process commenced in such courts (whether through service of
notice, attachment prior to judgment, attachment in aid of execution of
judgment, execution of judgment or otherwise), and (B) to the fullest extent
permitted by the applicable law, that (x) the suit, action or proceeding in such
court is brought in an inconvenient forum, (y) the venue of such suit, action or
proceeding is improper and (z) this Agreement, or the subject matter hereof, may
not be enforced in or by such courts. Without limiting the foregoing, each party
agrees that service of process on such party as provided in Section 4(f) shall
be deemed effective service of process on such party.

                  (e)      Successors and Assigns. The provisions of this
Agreement shall be binding upon and inure to the benefit of the parties hereto
and their respective legal successors and permitted assigns; provided that,
except as otherwise provided in this Agreement, no party may assign, delegate or
otherwise transfer any of its rights or obligations under this Agreement.

                  (f)      Notices. All notices and other communications given
or made pursuant hereto shall be in writing and shall be deemed to have been
duly given or made as of the date of receipt and shall be delivered personally
or mailed by registered or certified mail (postage prepaid, return receipt
requested), sent by overnight courier or sent by telecopy, to the parties at the
following addresses or telecopy numbers (or at such other address or telecopy
number for a party as shall be specified by like notice):

                            (i)     if to a Stockholder, at the address
                                    appearing below or at any other address that
                                    such Stockholder may have provided in
                                    writing to Purchaser,

                                         Cook Inlet Region, Inc.
                                         2525 C Street, Suite 500
                                         Anchorage, Alaska 99503

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                                          Attention: Mark Kroloff
                                          Facsimile:  (907) 263-5182

                           (ii)     if to Purchaser:

                                          Deutsche Telekom AG
                                          140 Friedrich-Ebert-Allee
                                          53113 Bonn
                                          Germany
                                          Attention:  Kevin Copp
                                          Facsimile:  49-228-181-44177

                  (g)      Waiver of Immunity. Purchaser agrees that, to the
extent that it or any of its property is or becomes entitled at any time to any
immunity on the grounds of sovereignty or otherwise based upon its status as an
agency or instrumentality of government from any legal action, suit or
proceeding or from setoff or counterclaim relating to this Agreement from the
jurisdiction of any competent court, from service of process, from attachment
prior to judgment, from attachment in aid of execution of a judgment, from
execution pursuant to a judgment or arbitral award, or from any other legal
process in any jurisdiction, it, for itself and its property expressly,
irrevocably and unconditionally waives, and agrees not to plead or claim, any
such immunity with respect to such matters arising with respect to this
Agreement or the subject matter hereof (including any obligation for the payment
of money). Purchaser agrees that the waiver in this provision is irrevocable and
is not subject to withdrawal in any jurisdiction or under any statute, including
the Foreign Sovereign Immunities Act, 28 U.S.C. Section 1602 et seq. The
foregoing waiver shall constitute a present waiver of immunity at any time any
action is initiated against Purchaser with respect to this Agreement.

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                  IN WITNESS WHEREOF, the parties hereto have executed this
Stockholders Agreement as of this 14th day of December, 2000.

                             PURCHASER:
                             DEUTSCHE TELEKOM AG

                             By:   /s/ Kevin Copp
                                ------------------------------------
                                Name:  Kevin Copp
                                Title: Head of International Legal Affairs

                             STOCKHOLDER:
                             COOK INLET REGION, INC.

                             By:   /s/ Craig A. Floerchinger
                                ------------------------------------
                                Name:  Craig A. Floerchinger
                                Title: Vice President, Finance and Accounting

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