POWERTEL INC /DE/
SC 13D, EX-4, 2000-09-06
RADIOTELEPHONE COMMUNICATIONS
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                                                                       EXHIBIT 4

                                             DONALD BURTON STOCKHOLDER AGREEMENT

                         POWERTEL STOCKHOLDER AGREEMENT

                  This Stockholder Agreement (this "AGREEMENT") dated as of
August 26, 2000 between the stockholders listed on the signature page hereto
(collectively, the "STOCKHOLDER") and Deutsche Telekom AG, an Aktiengesellschaft
organized and existing under the laws of the Federal Republic of Germany ("DT").

                  WHEREAS, simultaneously with the execution of this Agreement,
Powertel, Inc., a Delaware corporation ("POWERTEL"), and DT are entering into an
Agreement and Plan of Merger dated as of the date hereof providing for the
merger of a subsidiary of DT with and into Powertel (as amended or modified from
time to time, the "DT MERGER AGREEMENT");

                  WHEREAS, DT has agreed to enter into the DT Merger Agreement
only if the Stockholder enters into this Agreement;

                  WHEREAS, simultaneously with the execution of this Agreement,
Powertel and VoiceStream Wireless Corporation, a Delaware corporation
("VOICESTREAM"), are entering into an Agreement and Plan of Reorganization (as
amended or modified from time to time, the "VOICESTREAM REORGANIZATION
AGREEMENT"), dated as of the date hereof, providing for, among other things, the
merger of a subsidiary of VoiceStream with and into Powertel if, but only if,
the DT Merger Agreement is terminated;

                  NOW THEREFORE, in consideration of the foregoing and the
mutual premises, representations, warranties, covenants and agreements contained
herein and in the DT Merger Agreement, the parties hereto, intending to be
legally bound hereby, agree as follows:

                  1.       CERTAIN DEFINITIONS. This Agreement is one of the
Powertel Stockholder Agreements referred to in the recitals to the DT Merger
Agreement. Capitalized terms used but not defined in this Agreement are used in
this Agreement with the meanings given to such terms in the DT Merger Agreement.
In addition, for purposes of this Agreement the following terms shall have the
following meanings:

                  "BENEFICIALLY OWNED" or "BENEFICIAL OWNERSHIP" shall include,
with respect to any securities, the beneficial ownership of such securities by a
Stockholder and by any direct or indirect Subsidiary of a Stockholder.

                  "DT DERIVATIVE SECURITIES" means any security convertible into
or exchangeable for DT Securities or the value of which is derived from the
value of DT Securities.

                  "DT SECURITIES" means DT Ordinary Shares and DT Depositary
Shares, each representing the right to receive one DT Ordinary Share, and any
security into which DT Ordinary Shares or DT Depositary Shares are exchangeable
as contemplated by Section 1.05(f) of the DT Merger Agreement.

                  "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 Beneficial Ownership thereof, the
offer to make such a sale, transfer, constructive sale or other disposition, and
each option, agreement, arrangement or understanding, whether or


<PAGE>   2

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.

                  "VOICESTREAM/DT MERGER AGREEMENT" means the Agreement and Plan
of Merger between VoiceStream and DT dated as of July 23, 2000, as it may be
amended or modified from time to time.

                  2.       REPRESENTATIONS; WARRANTIES AND COVENANTS OF
STOCKHOLDER. Stockholder hereby represents and warrants, severally and not
jointly, to DT, solely with respect to itself, as of the date hereof, as
follows:

                  2.1      TITLE. As of the date hereof, Stockholder is the sole
record and Beneficial Owner of the number of shares of Powertel Common Stock or
Powertel Preferred Stock, as the case may be, set forth opposite Stockholder's
name on Schedule A attached hereto (Stockholder's "Existing Shares" and,
together with the record ownership or Beneficial Ownership of any shares of
Powertel Common Stock, Powertel Preferred Stock or other voting capital stock of
Powertel acquired after the date hereof, whether upon the exercise of warrants
or options, conversion of the Powertel Preferred Stock or any convertible
securities or otherwise, Stockholder's "Shares"), and/or the number of warrants,
options or other rights to acquire or receive such Powertel Common Stock or
Powertel Preferred Stock, as the case may be, set forth opposite Stockholder's
name on Schedule A attached hereto (Stockholder's "Existing Rights" and,
together with record ownership or Beneficial Ownership of any warrants, options
or other rights to acquire or receive such shares of Powertel Common Stock,
Powertel Preferred Stock or other voting capital stock of Powertel acquired
after the date hereof, Stockholder's "Rights"). Stockholder is the lawful owner
of the Existing Shares and Existing Rights, free and clear of all liens, claims,
charges, security interests or other encumbrances, except as disclosed on
Schedule A. As of the date hereof, the Existing Shares constitute all of the
capital stock of Powertel Beneficially Owned or owned of record by Stockholder
(excluding the Existing Rights) and Stockholder does not own of record or
beneficially, or have the right to acquire (whether currently, upon lapse of
time, following the satisfaction of any conditions, upon the occurrence of any
event or any combination of the foregoing) any shares of Powertel Common Stock
or Powertel Preferred Stock or any other securities convertible into or
exchangeable or exercisable for shares of Powertel Common Stock or Powertel
Preferred Stock, except pursuant to the Existing Rights.

                  2.2      RIGHT TO VOTE. Stockholder has, with respect to all
of Stockholder's Existing Shares, and will have at the Powertel Stockholders'
Meeting, with respect to all of Stockholder's Shares acquired prior to the
record date for the Powertel Stockholders' Meeting, sole voting power, sole
power of disposition or sole power to issue instructions with respect to the
matters set forth in SECTION 4 hereof and to fulfill its obligations under such
Section and shall not take any action or grant any person any proxy (revocable
or irrevocable) or power-of-attorney with respect to any Shares or Rights
inconsistent with his or its obligations as provided by SECTION 4


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AND SECTION 5 hereof. Stockholder hereby revokes any and all proxies with
respect to Stockholder's Existing Shares or Existing Rights to the extent they
are inconsistent with the Stockholders' obligations under this Agreement.

                  2.3      AUTHORITY. Stockholder has full legal power,
authority, legal capacity and right to execute and deliver, and to perform its
or his obligations under, this Agreement. No other proceedings or actions on the
part of Stockholder are necessary to authorize the execution, delivery or
performance of this Agreement or the consummation of the transactions
contemplated hereby. This Agreement has been duly and validly executed and
delivered by Stockholder and constitutes a valid and binding agreement of
Stockholder enforceable against Stockholder in accordance with its terms,
subject to (i) bankruptcy, insolvency, moratorium and other similar laws now or
hereafter in effect relating to or affecting creditors rights generally and (ii)
general principles of equity (regardless of whether considered in a proceeding
at law or in equity).

                  2.4      CONFLICTING INSTRUMENTS. Neither the execution and
delivery of this Agreement, nor the performance by Stockholder of its agreements
and obligations hereunder will result in any breach or violation of, or be in
conflict with or constitute a default under, any term of any agreement,
judgment, injunction, order, decree, law or regulation to which Stockholder is a
party or by which Stockholder (or any of its assets) is bound.

                  2.5      DT'S RELIANCE. Stockholder understands and
acknowledges that DT is entering into the DT Merger Agreement in reliance upon
Stockholder's execution, delivery and performance of this Agreement.

                  3.       RESTRICTION ON TRANSFER; OTHER RESTRICTIONS.

                  3.1      Stockholder agrees not to Transfer or agree to
Transfer any Shares or Rights owned of record or Beneficially Owned by
Stockholder, except as otherwise permitted by this Section 3 or pursuant to the
DT Merger Agreement, Transfers to any Affiliate of the Stockholder who agrees in
writing to be bound by the terms of this Agreement or Transfers which occur by
operation of law if the transferee remains, or agrees in writing to remain,
bound by the terms of this Agreement, other than, in each case, with DT's prior
written consent.

                  3.2      From the date hereof until the later of January 1,
2001 and the date of the Powertel Stockholders' Meeting, Stockholder agrees not
to Transfer any Shares or Rights owned of record or Beneficially Owned by
Stockholder, provided, however, that this SECTION 3.2 shall cease to be of any
force or effect immediately upon termination of the DT Merger Agreement.

                  3.3      From the later of January 1, 2001 and the date of the
Powertel Stockholders' Meeting until the earlier of the Effective Time or the
termination of the DT Merger Agreement, Stockholder may Transfer only up to
17.5% of Stockholder's Total Number of Shares; provided, however, that if the
Effective Time shall not have occurred by July 31, 2001, the percentage
specified in this SECTION 3.3 shall on August 1, 2001 be increased by 3.75% and,
if the Effective Time shall not have occurred by August 31, 2001, the percentage
specified in this SECTION 3.3 shall on September 1, 2001 be increased by an
additional 3.75%, for an aggregate amount from and after September 1, 2001 of
25%.


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                  3.4      From the Effective Time through and including the
three month anniversary of the Effective Time, Stockholder agrees not to
Transfer any DT Securities or DT Derivative Securities.

                  3.5      From the day following the three month anniversary of
the Effective Time, through and including the six month anniversary of the
Effective Time, Stockholder may Transfer only up to 40% of Stockholder's Total
Number of Shares, inclusive of any Transfer of any DT Derivative Securities.

                  3.6      For the avoidance of doubt, the portions of a
Stockholder's Total Number of Shares permitted to be Transferred pursuant to
SECTION 3.3 AND SECTION 3.5 are (i) separate and not cumulative such that if a
Stockholder does not fully utilize the permission to Transfer up to 17.5% of
Stockholder's Total Number of Shares pursuant to SECTION 3.3, Stockholder shall
not be permitted to Transfer more than 40% of Stockholder's Total Number of
Shares pursuant to SECTION 3.5 and (ii) exclusive of any Transfers permitted by
this Agreement which occur at any time after the date hereof and prior to the
end of the periods specified in such Sections.

                  3.7      For purposes of SECTION 3.3, a Stockholder's "Total
Number of Shares" is equal to the sum (such sum, the "INITIAL NUMBER OF SHARES")
of (i) the number of shares of Powertel Stock owned of record or Beneficially
Owned by the Stockholder as of the later of January 1, 2001 and the date of the
Powertel Stockholders' Meeting, including any shares of Powertel Common Stock
issuable upon conversion of any shares of Powertel Preferred Stock owned by the
Stockholder and (ii) the number of shares of Powertel Common Stock owned of
record or Beneficially Owned by the Stockholder as a result of the exercise or
conversion, as applicable, of any options, warrants or convertible securities
(other than Powertel Preferred Stock) to acquire shares of Powertel Common
Stock, during the period from the later of January 1, 2001 and the date of the
Powertel Stockholders' Meeting, until the earlier of the Effective Time and the
termination of the DT Merger Agreement. For purposes of SECTION 3.5,
Stockholder's Total Number of Shares is equal to the sum of (A) the number of DT
Securities which the Stockholder has received or may be entitled to receive as
the Merger Consideration pursuant to the DT Merger Agreement in respect of the
Initial Number of Shares and (B) the number of DT Securities owned of record or
Beneficially Owned by the Stockholder as a result of the exercise or conversion,
as applicable, of any options, warrants or convertible securities to acquire DT
Securities (other than any such options, warrants or convertible securities
included in the calculation of the Initial Number of Shares), during the
relevant periods specified in SECTION 3.5.

                  3.8      The foregoing limitations set forth in SECTIONS 3.3
AND 3.5 shall not apply to any Transfers pursuant to a tender offer, self tender
offer, exchange offer or other transaction offered generally to holders of DT
Securities and approved or not opposed by DT's Supervisory Board, and securities
subject to a Transfer made pursuant to this SECTION 3.8 shall be deemed
continued to be owned by the Stockholder for purposes of the calculations made
under SECTIONS 3.3 AND 3.5.

                  3.9      Stockholder agrees, prior to the Effective Time, not
to effect, directly or indirectly, or through any arrangement with a third party
pursuant to which such third party may


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effect, directly or indirectly, any short sales of any Powertel Stock, DT
Securities or DT Derivative Securities except in accordance with the limitations
of Section 3.3.

                  3.10     Stockholder hereby irrevocably waives any rights of
appraisal or rights to dissent from the merger contemplated by the DT Merger
Agreement that Stockholder may have.

                  3.11     If DT acquires any company after the date hereof for
consideration valued at more than $15 billion and, at the time the agreement in
respect of such acquisition by DT is entered into, (i) such company has a single
stockholder who owns 10% or more or a group of stockholders owning in the
aggregate 20% or more of the outstanding voting securities of such company and
(ii) in each case such stockholders are (or at any time within the prior two
years were) directors of or have the right to designate one or more directors to
the Board of Directors of such company or are officers of such company or such
company has any 5% or greater stockholders (other than institutional investors)
as to whom DT could reasonably enter into an agreement in support of such
acquisition and DT obtains or could reasonably be expected to obtain the
agreement of any such stockholder or group of stockholders of such company, as
the case may be, to vote for and support the acquisition or to limit its powers
of disposition in connection with the acquisition, the transfer restrictions
specified in SECTION 3.1 THROUGH 3.5 shall be revised to reflect the more
favorable treatment of the stockholders of such company or the absence of
restrictions, as the case may be, including the grant or sufferance to exist of
registration rights.

                  4.       AGREEMENT TO VOTE. 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 for the Powertel Stockholders' Meeting at the Powertel Stockholders'
Meeting and at any other annual or special meeting of stockholders of Powertel
or action by written consent where such matters arise (a) in favor of the Merger
and the DT Merger Agreement and approval of the terms thereof and each of the
other transactions contemplated thereby and (b) against, and will not consent
to, (i) approval of any Alternative Transaction or (ii) the liquidation or
winding up of Powertel. The obligations of each Stockholder specified in this
SECTION 4 shall apply whether or not the Board of Directors of Powertel makes a
Subsequent Determination.

                  5.       DELIVERY OF PROXY. In furtherance of the agreements
contained in Section 4 hereof, Stockholder hereby agrees (a) to complete and
send the proxy card received by Stockholder with the Powertel Proxy Statement,
so that such proxy card is received by Powertel, as prescribed by the Powertel
Proxy Statement, not later than the fifth Business Day preceding the day of the
Powertel Stockholders' Meeting, (b) to vote, by completing such proxy card but
not otherwise, all the Shares it owns of record or Beneficially Owns as of the
record date for the Powertel Stockholders' Meeting (i) in favor of the Merger
and the DT Merger Agreement and (ii) if the opportunity to do so is presented to
Stockholder on the proxy card, against any Alternative Transaction and (c) not
to revoke any such proxy.

                  6.       NO SOLICITATION. From and after the date hereof, the
Stockholders shall not, nor shall they permit any of their respective
Subsidiaries to, nor shall they authorize or permit any of their respective
officers, directors, members or employees to, and shall use their reasonable
best efforts to cause any investment banker, financial advisor, attorney,
accountants


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<PAGE>   6

or other representatives retained by them or any of their respective
Subsidiaries not to, directly or indirectly through another person, (i) solicit,
initiate or encourage (including by way of furnishing information), or knowingly
take any other action designed to facilitate, any Alternative Transaction, or
(ii) participate in any discussions or negotiations regarding any Alternative
Transaction, provided that nothing herein shall affect the ability of any
Stockholder in its capacity as an officer, director, employee or advisor to
Powertel to take any action permissible under the DT Merger Agreement.

                  7.       TERMINATION OF REGISTRATION RIGHTS. The registration
rights held by the Stockholder shall, in consideration of the undertakings by DT
under this Agreement and the DT Merger Agreement, be terminated and be of no
further force or effect effective at the Effective Time. The Stockholder agrees
that (a) until the earlier of (x) the later of January 1, 2001 and the date of
the Powertel Stockholders' Meeting, and (y) the termination of the DT Merger
Agreement, Stockholder shall not exercise any registration rights, (b) from the
date hereof until the earlier of the termination of the DT Merger Agreement or
the Effective Time, Stockholder shall not be entitled to the benefit of any
preemption rights that Stockholder may have under the agreements listed in the
immediately preceding sentence. None of the agreements so listed shall be
amended or modified in a manner inconsistent with the terms of this Agreement
without DT's prior written approval.

                  8.       ADDITIONAL SHARES AND ADDITIONAL RIGHTS. If, after
the date hereof, a Stockholder acquires record ownership or Beneficial Ownership
of any additional shares of capital stock of Powertel (any such shares,
"ADDITIONAL SHARES"), including, without limitation, upon exercise of any
option, warrant or right to acquire shares of capital stock of Powertel through
the conversion of the Powertel Preferred Stock or through any stock dividend or
stock split, or record ownership or Beneficial Ownership of any additional
options, warrants or rights to acquire shares of capital stock of Powertel (any
such options, warrants or rights, "ADDITIONAL RIGHTS"), the provisions of this
Agreement applicable to the Shares and the Rights shall be applicable to such
Additional Shares and Additional Rights from and after the date of acquisition
thereof. The provisions of the immediately preceding sentence shall be effective
with respect to Additional Shares or Additional Rights without action by any
person immediately upon the acquisition by any Stockholder of record ownership
or Beneficial Ownership of such Additional Shares or Additional Rights,
respectively.

                  9.       MISCELLANEOUS.

                  9.1      ENTIRE AGREEMENT. This Agreement constitutes the
entire agreement among the parties with respect to the subject matter hereof
and, except for the Stockholders Agreements as defined in the VoiceStream
Reorganization Agreement and the Stockholders Agreements as defined in the
VoiceStream/DT Merger Agreement, supersedes all other prior agreements and
understanding, both written and oral, among the parties hereto with respect to
the Transfer or voting of Shares. This Agreement is not intended to confer upon
any Person other than the parties hereto any rights or remedies hereunder.

                  9.2      COSTS AND EXPENSES. All costs and expenses incurred
in connection with this Agreement and the transactions contemplated hereby shall
be paid by the party incurring such expenses.


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                  9.3      INVALID PROVISIONS. If any provision of this
Agreement shall be invalid or unenforceable under applicable law, such provision
shall be ineffective to the extent of such invalidity or unenforceability only,
without it affecting the remaining provisions of this Agreement.

                  9.4      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. The
obligations of the Stockholders hereunder are several and not joint and the
covenants and agreements of the Stockholders herein are made only in their
capacity as stockholders of Powertel and not in any other capacity (including as
directors or officers of Powertel).

                  9.5      SPECIFIC PERFORMANCE. Stockholder agrees with DT as
to itself that if for any reason any Stockholder fails to perform any of its
agreements or obligations under this Agreement, irreparable harm or injury to DT
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, DT 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 9.5 are without
prejudice to any other rights or remedies, whether at law or in equity, that DT
may have against Stockholder for any failure to perform any of its agreements or
obligations under this Agreement.

                  9.6      AMENDMENTS; TERMINATION.

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

                  (B)      The provisions of this Agreement (other than Sections
3, 4 and 5) shall terminate upon the earliest to occur of (i) the Effective
Time, (ii) the date that is two (2) years after the date hereof, and (iii) the
termination of the DT Merger Agreement. The provisions of Sections 3.2 through
3.5 of this Agreement shall terminate when the applicable time periods set forth
therein lapse, the remaining provisions of Section 3 of this Agreement shall
terminate when each of Sections 3.2 through 3.5 of this Agreement have
terminated and the provisions of Section 4 and Section 5 of this Agreement shall
terminate upon the earlier to occur of the Effective Time and the termination of
the DT Merger Agreement.

                  9.7      GOVERNING LAW; SUBMISSION AND JURISDICTION.

                  (A)      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 thereof.

                  (B)      Each of the parties hereof irrevocably agrees that
any legal action or proceeding with respect to this Agreement or for recognition
and enforcement of any judgment in respect hereof 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 irrevocable submits with regard to any such action or
proceeding for itself and in respect to its


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<PAGE>   8

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, (i) 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
9.7(B) 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 (ii) 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 9.9 shall be
deemed effective service of process on such party.

                  9.8      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 (including, in the case of Stockholder or
any other individual, any executors, administrators, estates, legal
representatives and heirs of Stockholder or such individual) 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.

                  9.9      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 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):

                  (A)      if to Stockholder, at Stockholder's address appearing
on Schedule A hereto or at any other address that Stockholder may have provided
in writing to DT.

                  (B)      if to DT:

                                    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: Robert P. Davis
                                    Facsimile: (212) 225-3999


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<PAGE>   9

                  9.10     WAIVER OF IMMUNITY. DT 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). DT 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. ss. 1602 et seq. The foregoing
waiver shall constitute a present waiver of immunity at any time any action is
initiated against DT with respect to this Agreement.

            (the remainder of this page is intentionally left blank)


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<PAGE>   10

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

                                     DEUTSCHE TELEKOM AG


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

                                     DONALD W. BURTON

                                       /s/ Donald W. Burton
                                     -------------------------------------------

                                     THE BURTON PARTNERSHIP, L.P.


                                     By:  /s/ Donald W. Burton
                                         ---------------------------------------
                                        Name: Donald W. Burton
                                        Title: General Partner

                                     SOUTH ATLANTIC VENTURE FUND
                                        II

                                     By: South Atlantic Partners II, L.P.
                                     Title: General Partner


                                     By:  /s/ Donald W. Burton
                                         ---------------------------------------
                                        Name: Donald W. Burton
                                        Title: Chairman


                                       10
<PAGE>   11

                                     SOUTH ATLANTIC VENTURE FUND
                                        III

                                     By: South Atlantic Partners III, L.P.
                                     Title: General Partner


                                     By:  /s/ Donald W. Burton
                                         ---------------------------------------
                                        Name: Donald W. Burton
                                        Title: Chairman

                                     SOUTH ATLANTIC PRIVATE EQUITY
                                        FUND IV, L.P.

                                     By: South Atlantic Private Equity Partners
                                         IV, Inc.
                                     Title: General Partner


                                     By:  /s/ Donald W. Burton
                                         ---------------------------------------
                                        Name: Donald W. Burton
                                        Title: Chairman

                                      SOUTH ATLANTIC PRIVATE EQUITY
                                         FUND IV (QP), L.P.

                                      By: South Atlantic Private Equity Partners
                                          IV, Inc.
                                      Title: General Partner


                                      By:  /s/ Donald W. Burton
                                         ---------------------------------------
                                         Name: Donald W. Burton
                                         Title: Chairman


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<PAGE>   12

                                      THE BURTON PARTNERSHIP (QP),
                                          L.P.


                                      By:  /s/ Donald W. Burton
                                         ---------------------------------------
                                         Name: Donald W. Burton
                                         Title: General Partner


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<PAGE>   13

                                   SCHEDULE A

<TABLE>
<CAPTION>
     Stockholder Name and                Number of Existing Shares           Number and Description of
     --------------------                -------------------------           -------------------------
           Address                                                               Existing Rights
           -------                                                               ---------------

<S>                                      <C>                                <C>
Donald W. Burton                                                            Options to acquire 10,000
614 West Bay Street, Suite                                                  shares of Powertel Common
200                                                                         Stock
Tampa, Florida 33606

The Burton Partnership, L.P.,            116,104 Shares of Powertel
Donald W. Burton, General                Common Stock
Partner

The Burton Partnership (QP),             348,313 Shares of Powertel
L.P., Donald Burton, General             Common Stock
Partner

South Atlantic Venture Fund              654,893 Shares of Powertel
II, L.P.; South Atlantic                 Common Stock
Venture Partners II, L.P.,
general partner, of which Mr.
Burton is managing general
partner

South Atlantic Venture Fund              464,417 Shares of Powertel
III, L.P.; South Atlantic                Common Stock
Partners III, L.P., sole general
partner, of which Mr. Burton
is chairman

South Atlantic Private Equity            4,200 Shares of Powertel
Fund IV, L.P.; South Atlantic            Common Stock
Private Equity Partners IV,
sole general partner, of which
Mr. Burton is chairman

South Atlantic Private Equity            5,800 Shares of Powertel
Fund IV (QP) L.P.; South                 Common Stock
Atlantic Private Equity
Partners IV, Inc., sole general
partner, of which Mr. Burton
is chairman
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