<PAGE>



                                                                    EXHIBIT 10.2

                   LOCK-UP, FORBEARANCE, AND VOTING AGREEMENT

         This Lock-Up, Forbearance, and Voting Agreement (this "Agreement") is
made and entered into as of April 25, 2002, by and among (a) Pinnacle Holdings
Inc., a Delaware corporation (the "Company"), (b) each of Fortress Registered
Investment Trust ("Fortress") and Greenhill Capital Partners L.P. ("Greenhill,"
Fortress and together with their permitted successors and assignees under the
Securities Purchase Agreement (as hereinafter defined), the "Investors"), and
(c) the undersigned institution (the "Consenting Noteholder") of the Company's
10% Senior Discount Notes due 2008 (the "Senior Notes"). The Company, the
Investors and the Consenting Noteholders are collectively referred to herein as
the "Parties" and individually as a "Party."

         WHEREAS, the Company has entered into a Securities Purchase Agreement
dated April 25, 2002 with the Investors (the "Securities Purchase Agreement")
which has been proposed to serve as the basis for a financial restructuring of
the Company's obligations, including the Company's obligations under the Senior
Notes (the "Restructuring");

         WHEREAS, an informal committee of the holders of the Senior Notes
designated as the "Committee" under the Securities Purchase Agreement (the
"Committee"), the Company and the Investors have engaged in good faith
negotiations with the objective of reaching an agreement regarding the terms of
the Restructuring;

         WHEREAS, to implement the Restructuring, the Company and certain of its
subsidiaries shall, subject to the terms and conditions of this Agreement, (a)
file (i) a prenegotiated or traditional voluntary case (collectively, the
"Chapter 11 Cases") under Chapter 11 of title 11 of the United States Code, 11
U.S.C. ss.ss. 101-1330, as amended (the "Bankruptcy Code") in a United States
Bankruptcy Court (the "Bankruptcy Court"), (ii) a plan of reorganization (the
"Plan") consistent in all material respects with the Securities Purchase
Agreement as in effect on the date hereof with such amendments and changes as
are agreed to in accordance with the terms thereof, on or as soon as reasonably
practicable after the date of the filing of the Chapter 11 Cases, and (iii) an
accompanying disclosure statement (the "Disclosure Statement") consistent with
the terms set forth in this Agreement and the Securities Purchase Agreement and
(b) use its reasonable best efforts to have such Disclosure Statement approved
and such Plan confirmed by the Bankruptcy Court as expeditiously as possible
under the Bankruptcy Code and the Federal Rules of Bankruptcy Procedure (the
"Bankruptcy Rules"); and

         WHEREAS, to facilitate the implementation of the Plan, the Consenting
Noteholder is prepared, subject to the terms and conditions of this Agreement,
to vote its Senior Notes and any other claims against or interests in the
Company that it may own or control (collectively, "Restricted Claims") in favor
of the Plan, as it may be modified in accordance with the terms of the
Securities Purchase Agreement; provided, that such modifications do not deviate
from the terms of the Securities Purchase Agreement in a manner that is adverse
in any economic respect to the Consenting Noteholder.

         NOW, THEREFORE BE IT RESOLVED, that in consideration of the premises
and the mutual covenants and agreements set forth herein and the Securities
Purchase



<PAGE>

Agreement, and for other good and valuable consideration, the receipt
and sufficiency of which are acknowledged, the Parties agree as follows: Voting
in Favor of the Plan.

         Agreement to Vote. Subject to Section 4 hereof, the Consenting
         Noteholder irrevocably agrees during the period commencing on the date
         of this Agreement and continuing until the termination of this
         Agreement as provided for in Section 5 of this Agreement, (i) to vote
         timely all of its Restricted Claims in favor of the Plan as it may be
         modified in accordance with the terms of the Securities Purchase
         Agreement provided that such modifications do not deviate from the
         terms and conditions set forth in the Securities Purchase Agreement in
         a manner that is adverse in any economic respect to the Consenting
         Noteholder, by executing ballots in favor of the Plan and (ii) subject
         to Section 20 hereof, not to revoke or withdraw such vote so long as
         the Plan is not modified in a manner that is adverse in any economic
         respect to the Consenting Noteholder. The Consenting Noteholder agrees
         that its Agreement hereunder (but not its individual holdings) may be
         disclosed in solicitation materials prepared in connection with the
         Plan and acknowledges that the Company and the Investors may disclose
         the aggregate holdings of the Consenting Noteholder and other holders
         of Senior Notes executing lock-up, forbearance, and voting agreements
         with the Company and the Investors (the "Other Consenting
         Noteholders").

         Modifications. Notwithstanding any other provision of this Agreement,
         the Company may make such changes and modifications to the Plan and/or
         Disclosure Statement as the Company in its discretion deems necessary
         and appropriate, and to the extent permissible under 11 U.S.C. ss.ss.
         1125 and 1127, in order to have the Disclosure Statement approved and
         the Plan confirmed and consummated; provided, however, that the
         Consenting Noteholder shall not be required to support a Plan that
         deviates from the terms and conditions of the Securities Purchase
         Agreement in a manner that is adverse in any economic respect to the
         Consenting Noteholder, unless such deviations are applicable to the
         Consenting Noteholder and the Other Consenting Noteholders generally
         and have been approved by the Consenting Noteholders owning, as of the
         date of such modification, two-thirds in face amount and a majority in
         number of the Senior Notes (excluding those held by the Investors).

Forbearance. So long as (i) the Securities Purchase Agreement remains in effect
and (ii) the Company has not become a debtor under the Bankruptcy Code, the
Consenting Noteholder acknowledges and agrees that it shall forbear for sixty
(60) days following the execution hereof, from exercising (a) the right to
receive principal of, and interest on, any security held by the Consenting
Noteholder, (b) the filing of a notice of default, the taking of any action to
accelerate or otherwise collect on any security held by the Consenting
Noteholder, (c) pursuing any rights or remedies (including acceleration of
amounts due thereunder) available under any security held by the Consenting
Noteholder and (d) the commencement of litigation or proceedings (including
arbitration) of any kind or nature against the Company or any of its respective
subsidiaries, arising as the result of, or in connection with, any current
failure to pay the principal of, or interest on any security held by the
Consenting Noteholder, or a default under any security held by the Consenting
Noteholder or in respect of any other rights or remedies of the Consenting
Noteholder


                                       2
<PAGE>

under any security held by the Consenting Noteholder or the indenture that
governs any security held by the Consenting Noteholder or agreements between the
Company and the Consenting Noteholder. After the Company becomes a debtor under
the Bankruptcy Code, the Consenting Noteholder shall be entitled to exercise any
rights or remedies it has in connection with the Bankruptcy Cases; provided,
however, that so long as both this Agreement and the Securities Purchase
Agreement remain in effect, the Consenting Noteholder agrees to exercise such
rights and remedies only in a manner consistent with the provisions of the
Securities Purchase Agreement. For purposes of certainty, the parties hereto
acknowledge that the Consenting Noteholder specifically preserves whatever
rights it may have to compel the Companies to fulfill their fiduciary duties in
connection with the Securities Purchase Agreement or in the Chapter 11 Cases.

Restrictions on Transfer. So long as this Agreement remains in effect, the
Consenting Noteholder agrees that it shall not, without the prior written
consent of the Company, (a) sell, transfer, assign, pledge, gift or otherwise
dispose of any of its Restricted Claims in whole or in part, or any interest
therein, unless the transferee thereof accepts such Restricted Claims subject to
the terms of this Agreement, as evidenced by an agreement executed by such
transferee and delivered to the Company prior to the transfer that provides,
among other things, that the Company is an express third-party beneficiary of
such agreement or (b) grant any proxies, deposit any of its Restricted Claims
into a voting trust, or enter into a voting or tendering agreement with respect
to any of the Restricted Claims, unless such arrangement provides for compliance
with this Agreement. In the event that the Consenting Noteholder transfers such
Restricted Claims prior to the last date for voting on the Plan, the transferee
of such Restricted Claims shall comply with and be subject to all the terms of
this Agreement, including, but not limited to, the Consenting Noteholder's
obligations to vote in favor of the Plan and shall, as a condition precedent to
such transfer, execute an agreement with the Company and the Investors on terms
substantially identical in all material respects to the terms of this Agreement
and a ballot indicating its acceptance of the Plan.

Acknowledgment. This Agreement is not, and shall not be deemed to be, a
solicitation of votes to accept the Plan or an offering of any securities to be
issued under the Plan. The Company shall not solicit acceptances of the Plan
from, or offer such securities to, the Consenting Noteholder until the
Disclosure Statement has been approved by the Bankruptcy Court and the
Consenting Noteholder has been provided with all applicable solicitation
materials and related ballots.

Termination of Agreement. This Agreement shall terminate and all of the
obligations of the Parties shall be of no further force or effect in the event
that any of the following occurs:

                  (a)      the earlier to occur of (i) the termination of the
         Securities Purchase Agreement or (ii) six months following the earlier
         of (A) May 15, 2002 and (B) the date of filing of the Bankruptcy Plan;
         provided, however, that with respect to clause (ii) above, if the Plan
         has been confirmed and at such termination date the Company and the
         Investors are diligently proceeding to satisfy the conditions to
         Closing of the Securities Purchase Agreement, then the Investors and
         the Company shall have an additional thirty (30) days to consummate the
         Plan before the Consenting Noteholder may withdraw any votes cast
         pursuant to this Agreement pursuant to Section 20 hereof;


                                       3
<PAGE>

                  (b)      immediately, upon the conversion of the Chapter 11
         Cases to cases under Chapter 7 of the Bankruptcy Code;

                  (c)      the Disclosure Statement contains information
         materially different from information provided in writing to the
         Consenting Noteholder by the Company or the Investors in connection
         with the negotiation and execution of this Agreement which information
         adversely impacts the value of the consideration being received by the
         Consenting Noteholder pursuant to the Plan and (i) within ten (10) days
         after receipt of the Disclosure Statement, the Consenting Noteholder
         has given a written notice to the Company and the Investors specifying
         in reasonable detail the alleged differences, and (ii) within ten (10)
         days after receipt of such notice the Company has not advised the
         Consenting Noteholder that (A) it concurs with the claimed difference
         in the disclosure and will take steps to conform the disclosure to the
         previous disclosure (in which case the Company will have thirty (30)
         days to effect a cure) or (B) it disagrees with the Consenting
         Noteholder's notice and will submit the issue to the Bankruptcy Court
         for resolution (in which case the Parties will be bound by the
         determination of the Bankruptcy Court);

                  (d)      the Investors assign or otherwise transfer their
         rights under the Securities Purchase Agreement to any entity or person
         in violation of the Securities Purchase Agreement;

                  (e)      the Investors or the Company shall breach any
         provision of the Securities Purchase Agreement which by its terms
         requires consent, waiver, agreement, approval or other action by the
         Committee (as therein defined) and such breach creates adverse economic
         consequences to the Consenting Noteholder; or

                  (f)      any provision of the Securities Purchase Agreement
         which provides rights to the Committee shall be amended without the
         Committee's consent to remove or modify such right.

Representations and Warranties. Each Party represents, warrants and covenants,
severally and not jointly, as follows:

         Corporate Power and Authority. Each Party represents to each other
         Party that, as of the date of this Agreement, such Party is, and at all
         times thereafter until the Closing Date such Party will be duly
         organized, validly existing, and in good standing under the laws of the
         state of its organization, and has all requisite corporate,
         partnership, or LLC power and authority to enter into this Agreement
         and to carry out the transactions contemplated by, and perform its
         respective obligations under, this Agreement.

         Ownership of Company's Securities. The Consenting Noteholder (i) is the
         beneficial owner of, or holder of investment authority over, Restricted
         Claims in the aggregate principal amounts set forth below its name on
         the signature pages to this Agreement, and (ii) does not beneficially
         own, or hold investment authority over, any other Restricted Claims
         except as disclosed on such signature page. Except to extent


                                       4
<PAGE>

         required by law, the Company and the Investors shall not disclose in
         the Disclosure Statement or other public filings the Consenting
         Noteholder's individual holdings.

         Not An Investor Nor An Insider. The Consenting Noteholder represents to
         each other Party and to each other Consenting Noteholder (which for the
         purposes of this clause, a third-party beneficiary) that it (i) is not,
         as of the date hereof, and will not at any time on or prior to the
         Closing Date be, an Investor or an affiliate of an Investor and (ii) it
         is not and will not be an "insider" of the Company as such term is
         defined in the Bankruptcy Code. Notwithstanding their ownership of
         Senior Notes or any other securities of the Companies, neither
         Fortress, Greenhill nor any of their respective affiliates, shall be
         deemed an Other Consenting Noteholder for purposes of this Agreement.

Further Acquisition of Interests. This Agreement shall in no way be construed to
preclude the Consenting Noteholder from acquiring additional Senior Notes or
equity interests in the Company; provided, however, that if the Consenting
Noteholder acquires any such additional Senior Notes (or other claims against,
or interests in, the Company) after the date of this Agreement, such additional
Senior Notes (and other claims against, or interests in, the Company) shall
immediately upon such acquisition without further action on the part of the
Company or the Consenting Noteholders become a Restricted Claim subject to the
terms of this Agreement.

Amendments and Waivers. This Agreement may not be modified, amended, or
supplemented or any provision herein waived without the prior written consent of
the Company, the Investors and the Committee. The parties understand and agree
that no failure or delay in exercising any right, power or privilege under this
Agreement shall operate as a waiver thereof, nor shall any single or partial
exercise thereof preclude any other or further exercise thereof or the exercise
of any other right, power or privilege under this Agreement.

Impact of Appointment to Creditors' Committee. If an official committee of
unsecured creditors is appointed by the United States Trustee in the Chapter 11
Cases, the Company shall cooperate reasonably with the Consenting Noteholder in
seeking to cause the United States Trustee to appoint the Consenting Noteholder
to be members of such official committee pursuant to section 1102 of the
Bankruptcy Code. Nothing contained in this Agreement shall limit the ability of
the Consenting Noteholder, if appointed to such committee, to take such acts as
a committee member which are required by or consistent with the fiduciary duties
of a committee member; provided, however, that the freedom to act as a committee
member (including the freedom to vote in committee meetings and to instruct
committee professionals to act on behalf of the committee) shall not affect the
obligations of the Consenting Noteholder to vote its Restricted Claims as
provided herein and shall not otherwise affect the continuing obligations of the
Consenting Noteholder under this Agreement or the validity or enforceability of
this Agreement.

Governing Law; Jurisdiction. This Agreement shall be governed by and construed
in accordance with the internal laws of the State of New York, without regard to
any conflicts of law provision which would require the application of the law of
any other jurisdiction. By its execution and delivery of this Agreement, each of
the Parties irrevocably and unconditionally agrees for itself that any legal
action, suit or proceeding against it with


                                       5
<PAGE>

respect to any matter under or arising out of or in connection with this
Agreement or for recognition or enforcement of any judgment rendered in any such
action, suit or proceeding, may be brought in the United States District Court
for the Southern District of New York. By execution and delivery of this
Agreement, each of the Parties irrevocably accepts and submits itself to the
nonexclusive jurisdiction of such court, generally and unconditionally, with
respect to any such action, suit or proceeding. Notwithstanding the foregoing
consent to jurisdiction, upon the commencement of the Chapter 11 Cases, each of
the Parties agrees that the Bankruptcy Court, or such other court which may have
jurisdiction over the Chapter 11 Cases of the Company, shall have exclusive
jurisdiction of all matters arising out of or in connection with this Agreement.

Remedies. It is understood and agreed by each of the Parties that any breach of
this Agreement would give rise to irreparable harm for which money damages would
not be an adequate remedy and accordingly the parties agree that, in addition to
any other remedies, each non-breaching Party shall be entitled to specific
performance and injunctive or other equitable relief for any such breach. The
Company and the Investors agree that for so long as the Consenting Noteholder
has not taken any action to prejudice the enforceability of this Agreement
(including without limitation, alleging in any pleading that this Agreement is
unenforceable), and has taken such actions as are reasonably required or
desirable for the enforcement hereof, including voting for the Plan, then the
Consenting Noteholder shall have no liability for damages hereunder in the event
a court determines that this Agreement is not enforceable.

Headings. The headings of the sections, paragraphs and subsections of this
Agreement are inserted for convenience only and shall not affect the
interpretation of this Agreement.

Successors and Assigns. This Agreement is intended to bind and inure to the
benefit of the Parties and their respective successors, assigns, heirs,
executors, administrators and representatives.

Entire Agreement. This Agreement and the Securities Purchase Agreement attached
as Exhibit A constitute the entire agreement of the Parties with respect to the
subject matter of this Agreement, and supersede all other prior negotiations,
agreements, and understandings, whether written or oral, among the Parties with
respect to the subject matter of this Agreement.

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

No Third-Party Beneficiaries. Unless expressly stated herein, this Agreement
shall be solely for the benefit of the Parties and no other person or entity
shall be a third party beneficiary of this Agreement.

Severability. Any term or provision of this Agreement that is invalid or
unenforceable in any jurisdiction, shall, as to that jurisdiction, be
ineffective to the extent of such invalidity or unenforceability without
rendering invalid or unenforceable the remaining terms and provisions of this
Agreement or affecting the validity or enforceability of any of the terms or
provisions of this Agreement in any other jurisdiction. If any provision of this
Agreement is


                                       6
<PAGE>

so broad as to be unenforceable, the provision shall be interpreted to be only
so broad as is enforceable.

Consideration. It is acknowledged by the Parties that no consideration shall be
due or paid to the Consenting Noteholder for its agreement to vote to accept the
Plan in accordance with the terms and conditions of this Agreement, other than
the Company's agreement to use its reasonable best efforts to obtain approval of
any Disclosure Statement and confirmation of the Plan in accordance with the
terms and conditions of this Agreement.

Acknowledgment of Risks. The Consenting Noteholders has received and reviewed
this Agreement and the Securities Purchase Agreement and believes that it has
received "adequate information" with respect to its decision to vote on the
Plan, as such term is defined in 11 U.S.C. ss. 1125(a), subject however to
approvaL by a Bankruptcy Court of a disclosure statement under Section 1125
which contains information not materially different from the information
provided to the Investors. This Section 19 does not waive whatever rights the
Consenting Noteholder may have under Sections 1125-26 of the Bankruptcy Code.

20. Withdrawal of Support. Upon the termination of this Agreement, the
Consenting Noteholder (a) shall have no obligations hereunder, and in particular
shall have no obligation to vote its Restricted Claims in favor of the Plan, and
(b) may move under Bankruptcy Rule 3018 to withdraw or change any vote cast for
the Plan and the Company and the Investors agree that termination shall
constitute "cause" for such withdrawal or a change under Bankruptcy Rule 3018
and shall support such withdrawal or change.


                                       7
<PAGE>


         IN WITNESS WHEREOF, each of the Parties has caused this Agreement to be
executed and delivered by its duly authorized officer as of the date first above
written.


                                    PINNACLE HOLDINGS INC.


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

                                    FORTRESS REGISTERED INVESTMENT TRUST


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

                                    GREENHILL CAPITAL PARTNERS L.P.


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


                                       8
<PAGE>




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


$------------------------------
 Aggregate Principal Amount Of Senior Notes

         Held as follows:

         Amount                      Class
         ------                      -----

         $-------------              --------------
         $-------------              --------------
         $-------------              --------------
         $-------------              --------------
         $-------------              --------------
         $-------------              --------------


(Attach additional sheets if necessary)


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