Document:

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                                                        Exhibit 10.17.4
                                                        ---------------

                              IWO Holdings, Inc.
                     Independent Wireless One Corporation
                           319 Great Oaks Boulevard
                            Albany, New York 12203

                              September 17, 2000

Mr. J.K. Hage III
c/o Hage and Hage LLC
610 Charlotte Street
Utica, New York  13501

     Re:  Professional Services Agreement, effective as of December 20, 1999
          (the "Professional Services Agreement"), among Independent Wireless
          One Corporation ("IWO"), IWO Holdings, Inc. ("Holdings") and you;
          Stock Option Agreement, made as of December 20, 1999 (the "Stock
          Option Agreement"), between Holdings and you; Warrant to Purchase
          Shares of Class B Common Stock of IWO Holdings, Inc. (the "Management
          Warrant"), issued to you by Holdings; Management Stock Purchase
          Agreement, made as of December 20, 1999 (the "Management Stock
          Purchase Agreement"), between you and Holdings; Class B Stock
          Subscription Agreement, made as of December 20, 1999 (the
          "Subscription Agreement"), between you and Holdings; and Indemnity
          Agreement, dated as of December 20, 1999 (the "Indemnity Agreement"),
          between you and Holdings.

Dear J.K.:

     With reference to the above agreements, this letter agreement sets forth
certain understandings reached between Holdings, IWO and you.

     1.    Attached hereto as Exhibit A is a true and correct copy of the
Professional Services Agreement. Pursuant to section 5(a) thereof, your
engagement thereunder shall terminate as of the date hereof. You shall provide
strategic consulting and advisory services on the terms and conditions set forth
in the Consulting Agreement, dated as of the date hereof (the "Consulting
Agreement"), among IWO, Holdings and you attached hereto as Exhibit B.

     2.    Attached hereto as Exhibit C is a true and correct copy of the Stock
Option Agreement. You were granted, subject to the terms therein, the option to
purchase 12,902.6218 shares of Holdings' Class B Common Stock. You have
previously exercised your option and purchased 1,000.0000 of such shares. Of the
remaining option to purchase 11,902.6218 of such shares, effective as of the
date hereof :

     (a)   the option with respect to 10,602.6218 of such shares shall be deemed
to have vested and may be exercised in accordance with the Stock Option
Agreement, and subject to
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Section 6(a) of the Stock Option Agreement, will expire on the later of five
years after the date hereof or two years after an Initial Public Offering; and

     (b)   the option with respect to 1,300.0000 of such shares shall expire and
such portion of the option shall be canceled.

     (c)   Section 1 shall be amended by deleting the definitions of "Approved
Sale" and "Initial Public Offering" and replacing such definitions with the
following definitions:

           '"Approved Sale" means a transaction or a series of related
             -------------
           transactions other than a Designated Merger: (i) including, but not
           limited to, by way of merger or consolidation, which results in any
           "person" or "group" (as such terms are used in Sections 13(d) and
           14(d) of the Exchange Act or any successor provisions to either of
           the foregoing), other than (A) any one or more of the Initial
           Stockholders or Affiliates thereof or (B) a non-U.S. entity with
           respect to which an Initial Stockholder or Affiliate thereof has an
           administrative relationship, becoming the "beneficial owner" (as
           defined in Rule 13d-3 under the Exchange Act), directly or
           indirectly, of a majority of the total voting power of the capital
           stock of Holdings or otherwise able to elect a majority of the board
           of directors of Holdings (for purposes of this definition, such
           person or group shall be deemed to beneficially own capital stock of
           Holdings that is held by any other corporation so long as such person
           or group beneficially owns, directly or indirectly, in the aggregate
           a majority of the total capital stock of such other corporation); or
           (ii) which results in the sale, transfer, assignment, lease,
           conveyance or other disposition, directly or indirectly, of all or
           substantially all the assets of Holdings and its subsidiaries,
           considered as a whole (other than to an Affiliate thereof).

           "Initial Public Offering" means the sale of any of the common stock
            -----------------------
           of Holdings or the issuance of common stock of any Person in exchange
           for 100% of the capital stock of Holdings pursuant to a registration
           statement that has been declared effective under the Act, if
           following such sale or exchange (i) the issuer is a reporting company
           under Section 12(b) or 12(g) of the Securities Exchange Act of 1934,
           as amended, and (ii) such stock is traded on the New York Stock
           Exchange or the American Stock Exchange, or is quoted on the Nasdaq
           National Market System or is traded or quoted on any other national
           stock exchange or national securities system.

     (d)   Section 1 shall be amended further by adding the following
           definition:

           "Designated Merger" means a transaction that results in the merger,
            -----------------
           consolidation or amalgamation of Holdings with or into any Person
           that results in the conversion of the outstanding shares of capital
           stock of Holdings into shares of capital stock of such Person (or its
           Affiliate) and such Person (or its Affiliate) has an affiliation with
           Sprint Spectrum L.P

                                       2
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          (or its Affiliates) similar to the affiliation between IWO and Sprint
          Spectrum L.P and its Affiliates (other than with respect to the
          territory covered).

     (e)  Section 6(a) shall be amended by deleting such section in its entirety
and replacing such section with the following:

          "(a)    In the event of an Approved Sale or a Designated Merger, the
          unexercised portion of the Option shall terminate upon such Approved
          Sale or Designated Merger unless (i) provision is made in writing in
          connection with such Approved Sale or Designated Merger for the
          assumption of such Options, or for the substitutions of such Options
          of new awards covering the securities of a successor entity or an
          Affiliate thereof, with appropriate adjustments as to the number and
          kind of securities and exercise prices, in which event such
          outstanding Options shall continue or be replaced, as the case may be,
          in the manner and under the terms so provided; or (ii) the Board of
          Directors otherwise shall provide in writing for such adjustments as
          it deems appropriate in the terms and conditions of the then-
          outstanding Options, including without limitation (A) accelerating the
          vesting of outstanding Options and/or (B) providing for the
          cancellation of Options and their automatic conversion into the right
          to receive the securities, cash or other consideration that a holder
          of the shares underlying such Options would have been entitled to
          receive upon consummation of such Approved Sale or Designated Merger
          had such shares been issued and outstanding immediately prior to the
          closing date of the Approved Sale or Designated Merger (net of the
          appropriate option exercise prices). If pursuant to this Section 6(a)
          the Options are to terminate upon an Approved Sale or Designated
          Merger without provision for any of the actions described in clause
          (i) or (ii) above, then the Optionee shall be given at least ten (10)
          days' prior notice of the proposed Approved Sale or Designated Merger
          and shall be entitled to exercise such exercisable but unexercised
          portion of the Option at any time during such ten (10) day period up
          to and until the close of business on the day immediately preceding
          the date of consummation of such Approved Sale or Designated Merger,
          and, notwithstanding Section 7 hereof, the Exercise Price may, at the
          option of the Optionee, be paid in whole or in part by delivery of
          shares of the Class B Common Stock owned by the Optionee (the value of
          such shares delivered as payment of the Exercise Price shall be
          determined based on and consistent with the value of the consideration
          to be tendered in connection with such Approved Sale or Designated
          Merger), and upon exercise of the Option the Option Shares shall be
          treated in the same manner as the shares of any other holder of Class
          B Common Stock."

     3.   Attached hereto as Exhibit D is a true and correct copy of the
Management Warrant. Such Management Warrant shall be amended as follows:

                                       3
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     (a)  The words "or Panthers Merger" shall be inserted at the end of the
parenthetical clause in the heading thereof (appearing below the legend); and
the words "or Termination of Employment" shall be deleted from such
parenthetical clause.

     (b)  The words "or upon a Panthers Merger" shall be added to the end of the
first sentence in the first full paragraph following the heading thereof; and
the words "or in the event of the termination of Holder's employment with
Holdings or any of its Subsidiaries" shall be deleted from such first full
paragraph.

     (c)  Section 1 shall be amended by deleting the definition of "Approved
Sale" and replacing such definition with the following definition:

          '"Approved Sale" means a transaction or a series of related
            -------------
          transactions other than a Panthers Merger:  (i) including, but not
          limited to, by way of merger or consolidation, which results in any
          "person" or "group" (as such terms are used in Sections 13(d) and
          14(d) of the Exchange Act or any successor provisions to either of the
          foregoing), other than (A) any one or more of the Initial Stockholders
          or Affiliates thereof or (B)  a non-U.S. entity with respect to which
          an Initial Stockholder or Affiliate thereof has an administrative
          relationship, becoming the "beneficial owner" (as defined in Rule 13d-
          3 under the Exchange Act), directly or indirectly, of a majority of
          the total voting power of the capital stock of Holdings or otherwise
          able to elect a majority of the board of directors of Holdings (for
          purposes of this definition, such person or group shall be deemed to
          beneficially own capital stock of Holdings that is held by any other
          corporation so long as such person or group beneficially owns,
          directly or indirectly, in the aggregate a majority of the total
          capital stock of such other corporation); or (ii) which results in the
          sale, transfer, assignment, lease, conveyance or other disposition,
          directly or indirectly, of all or substantially all the assets of
          Holdings and its subsidiaries, considered as a whole (other than to an
          Affiliate thereof).

     (d)  Section 1 shall be amended further by adding the following definition:

          "Panthers Merger" means a transaction that (i) results in the merger,
           ---------------
          consolidation or amalgamation or other business combination of
          Holdings with or into an entity referred to by Holdings as "Panthers,"
          or the sale, transfer, assignment, lease, conveyance or other
          disposition, directly or indirectly, of all or substantially all the
          assets of Holdings and its subsidiaries, considered as a whole, to
          Panthers, and (ii) closes prior to March 31, 2001.

     (e)  The definitions "Termination of Employment," "Cause," "Disability" and
"Retirement" contained in Section 1 thereof shall be deleted in their entirety.

     (f)  The words ", provided such occurrence is prior to the Termination of
Employment" shall be deleted from the first sentence in each of Sections 2(a)
and 2(b) thereof.

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     (g)  Section 2(a)(ii) shall be amended to delete the "or" at the end of
          Section 2(a)(ii).

     (h)  Section 2(a)(iii) shall be amended to replace the "." at the end of
Section 2(a)(iii) with "; or".

     (i)  Section 2(a) shall be amended to add the following new clause (iv):

          "(iv)  immediately prior to the closing of a Panthers Merger."

     (j)  Section 2(b)(ii) shall be amended to delete the "or" at the end of
          Section 2(b)(ii).

     (k)  Section 2(b)(iii) shall be amended to replace the "." at the end of
Section 2(b)(iii) with "; or".

     (l)   Section 2(b) shall be amended to add the following new clause (iv):

          "(iv)  immediately prior to the closing of a Panthers Merger."

     (m)  Section 2(c) shall be amended by deleting such section in its entirety
and replacing such section with the following:

          "(c)  Holdings shall give to the Holder written notice (the "Holdings
                                                                       --------
          Notice") of the occurrence of an Approved Sale or a Panthers Merger at
          ------
          least 20 days prior to the anticipated closing of such Approved Sale
          or Panthers Merger or an Initial Investors Cash-Out within 100 days
          following such Initial Investors Cash-Out."

     (n)  Section 2(f) shall be amended by deleting such section in its entirety
and replacing such section with the following:

          "(f)  (i) If the Holdings Notice is with respect to a Panthers Merger,
          the Holder shall notify Holdings on or before five days prior to the
          anticipated closing date of such Panthers Merger of such Holder's
          exercise; (ii) with respect to an Approved Sale, if the Holdings
          Notice states that Holdings anticipates that such event will cause the
          vesting of the 40% IRR Warrant or the 60% IRR Warrant, the Holder
          shall notify Holdings on or before five days prior to the anticipated
          closing date of such Approved Sale of such Holder's exercise; and
          (iii) with respect to an Initial Investors Cash-Out, if the Holdings
          Notice states that such event has caused the vesting of either of such
          warrants, the Holder shall notify Holdings on or before five days
          following receipt of the Holdings Notice of such Holder's exercise of
          this Warrant (the "Notice Date") .  This Warrant shall be exercisable
                             -----------
          by the Holder in whole only, and not in part, by the surrender of this
          Warrant and delivery to Holdings on or before the Notice Date of (i) a
          duly executed notice of exercise in the form of Exhibit A (a "Notice
                                                                        ------
          of Exercise") and (ii) at the option of the Holder, either (A) the
          -----------
          Exercise Price for the Warrant Shares, payable in cash or by wire
          transfer to a bank account designated by Holdings or (B) in the case
          of a Panthers Merger, a

                                       5
<PAGE>

          notice by Holder to Holdings requesting the Warrant Shares be issued
          net of the appropriate Exercise Price (to be determined based on and
          consistent with the value of the consideration to be tendered in
          connection with such Panthers Merger)."

     (o)  Section 2(g) shall be amended by deleting such section in its entirety
and replacing such section with the following:

          "(g)    This Warrant shall terminate automatically upon the closing of
          an Approved Sale or a Panthers Merger and this Warrant shall no longer
          be of any force or effect, unless (i) provision is made in writing in
          connection with such transaction for the continuance of this Warrant
          and for the assumption of this Warrant, or for the substitution for
          this Warrant of a new Warrant covering the securities of a successor
          entity or an affiliate thereof, with appropriate adjustments as to the
          number and kind of securities and exercise price, in which event this
          Warrant shall continue or be replaced, as the case may be, in the
          manner and under the terms so provided; or (ii) the Board of Directors
          of Holdings shall provide in writing for such adjustment as it deems
          appropriate in terms and conditions of this Warrant, including without
          limitation (A) accelerating the vesting of this Warrant and/or (B)
          providing for the cancellation of this Warrant and its automatic
          conversion into the right to receive the securities, cash or other
          consideration that the Holder would have been entitled to receive upon
          consummation of such Approved Sale or Panthers Merger had Warrant
          Shares been issued and outstanding immediately prior to the Approved
          Sale or Panthers Merger (net of the appropriate exercise price)."

     (p)  Section 2(h) thereof shall be deleted in its entirety.

     4.   Attached hereto as Exhibit E is a true and correct copy of the
Management Stock Purchase Agreement. Holdings hereby waives any Repurchase Right
(as defined therein) that it may have pursuant to Section 3(a) thereof and you
hereby waive any Put Right that you may have pursuant to Section (b) thereof.

     5.   Attached hereto as Exhibit F is a true and correct copy of the
Subscription Agreement.

     6.   Attached hereto as Exhibit G is a true and correct copy of the
Indemnity Agreement.

     7.   Holdings or IWO shall retain on mutually acceptable terms Hage and
Hage LLC as its outside legal counsel for the period commencing the date hereof
through December 31, 2000 and shall pay $25,000 per month as a retainer for
services to be rendered.

     8.   You, for yourself, your agents, legal representatives, assigns, heirs,
distributees, devisees, legatees, administrators, personal representatives and
executors ("Your Parties"), on the one hand, and Holdings and IWO, its present,
            ------------
past and future subsidiaries and affiliates,

                                       6
<PAGE>

successors and assigns, and their respective present and past officers,
directors, employees and agents ("Our Parties"), on the other hand hereby
                                  -----------
release and forever discharge the other, from any and all claims, demands,
actions, liabilities and other claims for relief and remuneration whatsoever,
whether known or unknown; provided, however, that nothing contained herein shall
relieve IWO, Holdings or you from any obligation arising herein, under the
agreements referenced herein (as modified by this agreement), under the
Indemnity Agreement dated December 20, 1999 between Holdings and you, under the
Indemnity Agreement dated November 5, 1999 between IWO and you, under the
Certificate of Incorporation of Holdings or IWO or under the Stockholders
Agreement dated December 20, 1999 between Holdings, you and the other parties
thereto. Your Parties and Our Parties further agree not to assert any claim,
charge or other legal proceeding against the other, in any forum, based on any
events, whether known or unknown, which are the subject of the release contained
in this Section 8.

     9.   Except for the changes described herein, the Stock Option Agreement,
the Warrant and the Management Stock Purchase Agreement will be unchanged and
remain in full force and effect.

     10.  In connection with a Designated Merger if and when requested by the
board of directors of Holdings, you agree to enter into a lockup agreement and a
voting agreement with respect to your shares of capital stock of Holdings and
Parent and any such capital stock that may be acquired upon the exercise of
options or warrants for such capital stock, to the extent and on substantially
the same basis as Investcorp S.A. and its subsidiaries enter into such
agreements with respect to their capital stock of Holdings and Parent.

     11.  You hereby waive any acceleration of benefits pursuant to the Stock
Option Agreement, the Warrant or the Management Stock Purchase Agreement unless
shareholder approval meeting the requirements of Section 280G(b)(5) of the
Internal Revenue Code of 1986, as amended (the "Code"), with respect to such
benefits is obtained.

     12.  You agree that this letter agreement (excluding for this purpose
paragraph 11 of such agreement) shall not be effective unless shareholder
approval meeting the requirements of Section 280G(b)(5) of the Code is obtained.

     13.  This letter agreement shall inure to the benefit of, and be binding
upon, the heirs, executors, administrators, successors and assigns of you,
Holdings and/or IWO.

     14.  The parties hereto agree to take or cause to be taken all such further
actions as may be reasonably necessary or appropriate to effectuate the intent,
purposes and obligations of this letter agreement.

                                       7
<PAGE>

     Please indicate your acceptance of the terms hereof by signing in the
appropriate space below and sending a facsimile of this letter to Frederick A.
Walters at (212) 351-3952.

                                  Very truly yours,

                                  IWO HOLDINGS, INC.

                              By: /s/ Solon L. Kandel
                                  --------------------
                                  Name:  Solon L. Kandel
                                  Title:  President and Chief Executive Officer

                              INDEPENDENT WIRELESS ONE
                              CORPORATION

                              By: /s/ Solon L. Kandel
                                 --------------------
                                 Name:  Solon L. Kandel
                                 Title:  President and Chief Executive Officer

Agreed and accepted:

J.K. HAGE III

/s/ J.K. Hage III
--------------------------------------<PAGE>

                                                                 Exhibit 10.17.5
                                                                 ---------------

                             CONSULTING AGREEMENT

     THIS CONSULTING AGREEMENT (this "Agreement"), effective as of September 17,
2000, is hereby made by and between INDEPENDENT WIRELESS ONE CORPORATION ("IWO")
a Delaware corporation, IWO HOLDINGS INC., a Delaware corporation ("Holdings"
and along with its wholly owned subsidiary, IWO, the "Corporation") having an
office at 319 Great Oaks Boulevard, Albany, New York, 12203-5971 and Mr. J.K.
Hage, III, Esq., 610 Charlotte Street, Utica, New York, 13501 (the
"Consultant").

                             W I T N E S S E T H:
                             --------------------

     WHEREAS, Consultant wishes to provide strategic consulting and advisory
services to the Corporation on the terms and conditions contained herein and
shall make himself available to perform such services;

     WHEREAS, the Corporation desires to engage Consultant to provide strategic
consulting and advisory services to the Corporation on the terms and conditions
herein.

     IT IS THEREFORE AGREED that in consideration of the mutual promises, terms,
provisions, and conditions set forth in this Agreement, the parties hereby agree
as follows:

     1.  Consulting Services.  Subject to the terms and conditions set forth in
this Agreement, the Corporation hereby offers and Consultant hereby accepts the
appointment to act in the capacity of an Independent Contractor for the purposes
and upon the terms hereinafter set forth.

     2.  Term.  This Agreement shall become effective as of the date hereof (the
"Effective Date") and shall continue until the date occurring one year after the
Effective Date or the death of Consultant or unless and until terminated
pursuant to Paragraph 5 below.  The term of this Agreement is hereafter referred
to as "the term of this Agreement" or "the term hereof."

     3.  Duties.

          (a) Consultant shall assist the Corporation, and/or its affiliates, in
(i) making a transition from the Corporation's prior arrangement for legal
services under the Professional Services Agreement between the Corporation and
Consultant to a new arrangement to be determined by the Corporation, (ii)
recruiting a General Counsel of the Corporation if requested by the Corporation,
(iii) managing the operations of the Corporation as requested by the Corporation
and (iv) providing strategic consulting and advisory services to the Corporation
as requested by the Corporation.

          (b) During the term hereof, Consultant shall devote and expend for the
benefit of the Corporation, such attention and efforts as reasonably requested
by the Corporation.  During the term hereof, Consultant shall use his best
efforts, professional judgment, skill, and knowledge to foster the advancement
of the business and interests of the Corporation and shall efficiently perform
his duties hereunder.  Subject to his ethical and professional responsibilities,
Consultant shall be entitled without constraint to engage in any other
professional or business
<PAGE>

activity or serve in any industry, trade, governmental, or academic position
during the term of this Agreement including, without limitation, telephone,
wireless, fiber, internet and cable television businesses. The Corporation
agrees that the duties assigned to Consultant shall not oblige Consultant to
engage in any activity nor perform any act that would be inconsistent with his
ethical and professional responsibilities. Notwithstanding anything to the
contrary contained in this paragraph 3, in no event shall Consultant engage in
any activity which would in any way actually and materially conflict with the
business interests of the Corporation.

     4.  Compensation.

         (a) Services.  The Corporation shall pay, as compensation for all
             --------
services performed by Consultant under and during the term hereof and subject to
performance of Consultant's duties and of the obligations of Consultant,
pursuant to this Agreement or otherwise, $10,000 per month, payable within
fifteen (15) days of the end of each month during the term of this Agreement;
provided, that, if Consultant's engagement hereunder is terminated pursuant to
Section 5(b) hereof, Consultant shall be entitled to be paid, within fifteen
(15) days of such termination, an amount equal to the total compensation that
would have been paid to Consultant pursuant to this Section 4(a) had such
termination not occurred less the amount of compensation that has been
previously paid or become payable to Consultant pursuant to this Section 4(a).

         (b) Bonus.  The Corporation shall pay, as a bonus for services
             -----
performed by Consultant pursuant to his engagement hereunder, amounts determined
as follows:

             (i)   In the event that the closing of a Designated Merger occurs
on or prior to December 31, 2000, the Corporation shall pay a bonus in the sum
of two hundred fifty thousand dollars ($250,000) on the date of such closing.

             (ii)  In the event that the closing of a Designated Merger does not
occur on or prior to December 31, 2000, the Corporation shall pay a bonus in an
amount up to two hundred fifty thousand dollars ($250,000) based upon Holdings'
board of directors (the "Board") reasonable discretionary evaluation of
Consultant's individual performance, which amount shall be determined by the
Board and shall be paid on January 1, 2001.

             (iii) In the event that the closing of a Designated Merger occurs
subsequent to December 31, 2000 and during the term hereof (provided that no
closing of a Designated Merger has previously occurred), the Corporation shall
pay a bonus in an amount equal to two hundred fifty thousand dollars ($250,000)
less the amount paid to Consultant to Section 4(b)(ii) hereof on the date of
such closing.

         (c) Business Expenses.  The Corporation shall pay or reimburse
             -----------------
Consultant for all reasonable and necessary business expenses incurred or paid
by Consultant in the performance of his duties and responsibilities hereunder,
subject to any such reasonable substantiation and documentation as may be
specified by the Corporation from time-to-time. Such expenses shall include,
without limitation: (i) in accordance with standard Corporation policy, charges
for travel, mileage, tolls, parking, and lodging (but not in connection with
home-to-Utica office commuting); and (ii) actual costs incurred by Consultant
(not including any overhead or administrative factors) for courier services,
overnight delivery, postage, online
                                       2
<PAGE>

research, photocopying, printing, facsimile, long distance charges, and the
like. Consultant's said expenses shall be invoiced to the Corporation monthly,
and the Corporation shall make payment thereon within thirty (30) days after
receipt of each valid invoice.

          (d) Other Benefits.  Consultant shall be entitled during the term
              --------------
hereof to the exclusive use of one (1) laptop computer with all appropriate
peripherals, which laptop computer and peripherals shall be the same laptop
computer and peripherals in the possession of Consultant as of the date hereof
pursuant to the Professional Services Agreement, effective as of December 20,
1999 (the "Professional Services Agreement"), among IWO, Holdings and
Consultant; provided, that Consultant shall not be entitled to any payment for
upgrades to such laptop computer and peripherals.  Consultant shall be entitled
during the term hereof to the exclusive use of three (3) wireless telephones,
which wireless telephones shall be the same wireless telephones in the
possession of Consultant as of the date hereof pursuant to the Professional
Services Agreement; provided, that Consultant shall not be entitled to any
payment for upgrades to such wireless telephones.  Consultant shall be entitled
during the term hereof to payment of all tolls and charges associated with the
use of such wireless telephones.  After the term hereof, Consultant shall be
entitled to retain such laptop computer and peripherals and such wireless
telephones.

     5.   Termination of Engagement.

          (a) Notwithstanding anything to the contrary express or implied
herein, Consultant's engagement hereunder shall terminate upon written notice by
either party to the other of the notifying party's intention to terminate
Consultant's performance and services hereunder.  In such connection it is
understood and agreed that the Corporation may terminate this Agreement and
dismiss Consultant without cause and for any reason deemed sufficient by the
Corporation.

          (b) Notwithstanding anything to the contrary express or implied
herein, Consultant's engagement hereunder shall terminate upon the closing of an
Approved Sale or a Designated Merger.

          (c) Upon the effective date of notice of termination of Consultant's
engagement hereunder pursuant to subsection (a) above or the termination of
Consultant's engagement hereunder pursuant to subsection (b) above:  (i) the
Corporation shall not have any further obligation or liability to Consultant
under this Agreement, other than for pro rata fees for services earned and
unpaid through the date of termination, as well as for any expense reimbursement
accruing through the date of termination; and (ii) all obligations and
provisions of this Agreement shall terminate except with respect to any accrued
and unpaid or unexercised monetary obligations and except for the provisions of
Sections 6 through (and inclusive of) 18 hereof.

     6.   Restrictive Covenants.

          (a) Consultant shall treat either as trade secrets or as confidential
or proprietary information of the Corporation (i) any data or information
acquired during the course of or as a result of his engagement, which is not
otherwise available to Consultant except by

                                       3
<PAGE>

reason of his engagement, including but not limited to such items as reports or
findings from tests, investigative studies, consultations or the like,
methodology, proposals, systems, programs, or marketing techniques, and
strategies developed by but not generally released by the Corporation or
peculiar to the business of any customer of the Corporation and all
particularized information relating thereto; (ii) names or lists of the
Corporation's clients or information, data, or services made available to such
clients not made public by the Corporation and non-public information relating
to the operating methods or plans or requirements of any customer of the
Corporation; and (iii) any other data or information designated either by the
Corporation or by any of its customers or clients as confidential or
proprietary.

          (b) All improvements, discoveries, programs, processes, innovations,
and inventions (whether or not deemed patentable) conceived, devised, made,
developed, or perfected by Consultant during any period of his engagement by the
Corporation or any period prior to the effective date hereof during which
Consultant was in the service of any entity acquired by the Corporation or any
period prior to the effective date hereof during which Consultant was in the
service of any entity acquired by the Corporation and related in any material
way to the business, including development and research of the Corporation,
shall be made and promptly disclosed to the Corporation and the same shall be
the sole and absolute property of the Corporation.  Upon request of the
Corporation, Consultant will execute all documents reasonably deemed appropriate
by the Corporation to secure the foregoing rights and for obtaining the grants
of patents, both domestic and foreign, with respect to such improvements,
discoveries, programs, processes, innovations, or inventions and for vesting
title to such patents in the Corporation; provided, however, that Consultant
shall not be required to incur any costs or legal expenses in conjunction with
the compliance of any such request.

          (c) Consultant agrees to refrain, except as properly required in the
business of the Corporation, or as authorized in writing by the Corporation, (i)
from using for Consultant's own benefit any matters to be treated as trade
secrets or as confidential or proprietary information under Paragraph (a) above;
(ii) from using these matters for the benefit of any other person, firm, or
corporation; (iii) from disclosing these matters to any other person, firm, or
corporation; and (iv) from authorizing or permitting such disclosure during the
term of his engagement or thereafter.

          (d) Consultant agrees to surrender to the Corporation at any time upon
request and in any event upon termination of this Agreement, except as the
Corporation may otherwise consent in writing, all written documents, sketches,
records, or information whether copyrighted or patented or not, or any copies of
imitations thereof, whether made by Consultant or not, which embody or contain
or describe in any way those matters to be treated as trade secrets or as
confidential or proprietary information under Paragraph (a) above.  The
Corporation shall not unreasonably withhold authorization for Consultant to
retain any matters covered by this Paragraph 6, the continued possession of
which by Consultant will not, in the Corporation's sole but reasonable opinion,
be detrimental to the best interest of the Corporation.

          (e) Consultant agrees, during the term of this Agreement and for a
period of two (2) years after the termination thereof, whether such termination
be voluntary or not, that Consultant will not except at the direction of the
Corporation, either directly or indirectly, for himself as a proprietor,
principal partner, director, officer, employee, agent or other

                                       4
<PAGE>

representative acquire or attempt to acquire the business then conducted by the
Corporation with any customer of the Corporation under any contracts existing or
proposals submitted on or before the date of termination of this Agreement;
provided, however, that nothing contained in this Subparagraph (e) or elsewhere
in this Agreement shall be construed to impede or diminish Consultant's right
and entitlement, hereby confirmed, to pursue the practice of law in the
furnishing of legal representation to clients, subject only to the constraints
of applicable ethical rules and those provisions of this Agreement regarding
confidential or proprietary information.

          The term "customer of the Corporation" for purposes hereof shall mean
any individual or entity which is the ultimate user or recipient of the
Corporation's (or any subsidiary of the Corporation) services and products
whether the same be made available directly or to such entity or through an
intermediate purchaser of such services and products.

          (f) Consultant agrees to refrain, during the term of his engagement
and for one (1) year thereafter, from hiring or offering to hire, except with
the written permission of the Corporation, any employee of the Corporation or
from enticing away or in any other manner persuading or attempting to persuade
any employee of the Corporation to discontinue his relationship with the
Corporation; provided, however, that nothing herein shall prohibit Consultant
from hiring or offering to hire, any employee of the Corporation where the
initial hiring inquiry was solely initiated by any such employee or a third
party without direction from Consultant.

          (g) No provision of this Paragraph 6 is intended to limit Consultant's
right to use or disclose information which is in the public domain or a matter
of common knowledge, or which is generally known in the industry, or acquired by
him from a third party not prohibited from making such disclosure to him, or
which information was already known to Consultant other than by breach of this
Agreement; nor is it intended to limit Consultant's obligation to comply with
lawful subpoenas or to other lawful process.

          (h) No act or failure to act shall be a waiver of any right conveyed
hereunder, except an express waiver in writing.  The rights reserved to the
Corporation under this Paragraph 6 of this Agreement are necessarily of a
special, unique, unusual, and extraordinary character, which gives them a
peculiar value, the loss of which cannot reasonably or adequately be compensated
for in damages in an action at law, and the breach by Consultant of any of the
provisions in this Paragraph 6 will cause the Corporation irreparable injury.
Therefore, in addition to any other available remedies, the Corporation shall be
entitled to an injunction to restrain any violation of this Agreement by
Consultant, his agents, servants, or employees and all persons, firms, or
corporations acting for or with him.  The obligations of Consultant under the
covenants herein contained shall not cease upon termination of his engagement
for whatever reason, except where otherwise limited in time above.

          These covenants contained in this Paragraph 6 on the part of
Consultant shall each be construed as an agreement independent of any other
provision in this Agreement, and the existence of any claim or cause of action
of Consultant against the Corporation, whether predicated on this Agreement or
otherwise, shall not constitute a defense to the enforcement by the Corporation
of such covenants.  It is the intention of both parties to make the covenants of
this Paragraph 6 binding only to the extent that it may be lawfully done under
existing applicable

                                       5
<PAGE>

law. In the event that any part of any covenant of this Paragraph 6 is
determined by a court of law to be overly broad thereby making the covenant
unenforceable, the parties hereto agree, and it is their desire, that such court
shall substitute a reasonable judicially enforceable limitation in place of the
offensive part of the covenant, and that as so modified the covenant shall be as
fully enforceable as set forth herein by the parties themselves in the modified
form.

     7.  Conflicting Agreements.  Consultant hereby represents and warrants that
the execution of this Agreement and the performance of his obligations hereunder
will not breach or be in conflict with any other agreement to which Consultant
is a party or is bound and that Consultant is not subject to any covenants
against competition or similar covenants that would affect the performance of
his obligations hereunder.

     8.  Definitions.  Words or phrases that are initially capitalized or are
within quotation marks shall have the meanings provided in this Section 12 and
as provided elsewhere herein.  For purposes of this Agreement, the following
definitions apply:

          (a) "Affiliate" means (a) any Person which, directly or indirectly, is
in control of, is controlled by, or is under common control with, such Person or
(b) any Person who is a director or officer (i) of such Person, (ii) of any
subsidiary of such Person or (iii) of any Person described in clause (a) above.
For purposes of this definition, "control" of a Person means the power, directly
or indirectly, (x) to vote 50% or more of the securities having ordinary voting
power for the election of directors of such Person whether by ownership of
securities, contract, proxy or otherwise, or (y) to direct or cause the
direction of the management and policies of such Person whether by ownership of
securities, contract, proxy or otherwise.

          (b) "Approved Sale" means a transaction or a series of related
transactions other than a Designated Merger:  (i) including, but not limited to,
by way of merger or consolidation, which results in any "person" or "group" (as
such terms are used in Sections 13(d) and 14(d) of the Exchange Act or any
successor provisions to either of the foregoing), other than (A) any one or more
of the Initial Stockholders or Affiliates thereof or (B)  a non-U.S. entity with
respect to which an Initial Stockholder or Affiliate thereof has an
administrative relationship, becoming the "beneficial owner" (as defined in Rule
13d-3 under the Exchange Act), directly or indirectly, of a majority of the
total voting power of the capital stock of Holdings or otherwise able to elect a
majority of the board of directors of Holdings (for purposes of this definition,
such person or group shall be deemed to beneficially own capital stock of
Holdings that is held by any other corporation so long as such person or group
beneficially owns, directly or indirectly, in the aggregate a majority of the
total capital stock of such other corporation); or (ii) which results in the
sale, transfer, assignment, lease, conveyance or other disposition, directly or
indirectly, of all or substantially all the assets of Holdings and its
subsidiaries, considered as a whole (other than to an Affiliate thereof).

          (c) "Closing Date" means December 20, 1999.

          (d) "Designated Merger" means a transaction that results in the
merger, consolidation or amalgamation of Holdings with or into any Person that
results in the conversion of the outstanding shares of capital stock of Holdings
into shares of capital stock of such Person (or its Affiliate) and such Person
(or its Affiliate) has an affiliation with Sprint Spectrum L.P (or

                                       6
<PAGE>

its Affiliates) similar to the affiliation between IWO and Sprint Spectrum L.P
and its Affiliates (other than with respect to the territory covered).

          (e) "Initial Stockholders" means the stockholders of Holdings who
became stockholders as of the Closing Date (including employees or directors of
Holdings or any Subsidiary who were granted options to purchase stock as of the
Closing Date) and any transferees of such stockholders described in clause (i)
or (ii) in the definition of Approved Sale.

          (f) "Subsidiary" means any joint venture, corporation, partnership or
other entity as to which Holdings, whether directly or indirectly, has more than
50% of the (i) voting rights or (ii) rights to capital or profits.

          (g) "Person" means an individual, partnership, joint venture, limited
liability company, corporation, trust, unincorporated organization or a
government or any department or agency thereof.

     9.  Assignment.  Neither the Corporation nor Consultant may make any
assignment of this Agreement or any interest herein, by operation of law or
otherwise, without the prior written consent of the other; provided, however,
that the Corporation may assign its rights and obligations under this Agreement
without the consent of Consultant in the event that the Corporation shall
hereafter effect a reorganization, or consolidate with or merge into any other
Person, or transfer, all or substantially all, of its properties or assets to
any other Person.  However, any such assignment or delegation shall not relieve
the Corporation of its financial obligations to Consultant under this Agreement.
Except in conjunction with his estate planning or death, Consultant may not
assign any rights under this Agreement.  This Agreement shall inure to the
benefit of and be binding upon the Corporation and Consultant, and their
respective successors, executors, administrators, heirs, and permitted assigns.

     10.  Severability.  If any portion or provision of this Agreement shall to
any extent be declared illegal or unenforceable by a court of competent
jurisdiction, then the remainder of this Agreement, or the application of such
portion or provision in circumstances other than those as to which it is so
declared illegal or unenforceable, shall not be affected thereby, and each
portion and provision of this Agreement shall be valid and enforceable to the
fullest extent permitted by law.  If, however, such remainder of this Agreement
materially changes any right or benefit accruing to Consultant, then Consultant
shall have the right to terminate this Agreement on thirty days' written notice
to Corporation.

     11.  Waiver.  No waiver of any provision hereof shall be effective unless
made in writing and signed by the waiving party.  The failure of either party to
require the performance of any term or obligation of this Agreement, or the
waiver by either party of any breach of this Agreement, shall not prevent any
subsequent enforcement of such term or obligation or be deemed a waiver of any
subsequent breach.

     12.  Notice.  Any notices, requests, demands or other communications
required or permitted under this Agreement shall be in writing and shall be
deemed to have been given when delivered personally, one (1) day after being
sent by recognized overnight courier service with all charges prepaid or charged
to the sender's account, or three (3) days after being mailed by

                                       7
<PAGE>

certified mail, return receipt requested, addressed to the party being notified
at the address of such party first set above, or at such other address as such
party may hereafter have designated by notice; provided, however, that any
notice of change of address shall not be effective until its receipt by the
party to be charged therewith. Copies of any notices or other communications to
the Corporation shall simultaneously be sent by first class mail to:

               Independent Wireless One Corporation
               319 Great Oaks Boulevard
               Albany, New York  12203-5971

        Notice to Holdings shall be as follows:

               c/o lnvestcorp International Inc.
               280 Park Avenue
               New York, New York  10017
               Telephone:  212-599-4700
               Facsimile:  212-983-7073
               Attention:  Christopher J. Stadler

               With a copy to:

               Gibson, Dunn & Crutcher LLP
               200 Park Avenue
               New York, New York  10166
               Telephone:  212-351-4000
               Facsimile:  212-351-4035
               Attention:  E. Michael Greaney, Esq.

     13.  Enforcement of Covenants:  Injunctive Relief.  Consultant acknowledges
and agrees that were he to breach any of the covenants contained in this
Agreement, the damage would be irreparable, Consultant therefore agrees that the
Corporation, in addition to any other remedies available to either of them,
shall be entitled to preliminary and permanent injunctive relief against any
breach or threatened breach by Consultant of any of said covenants, without
having to post bond.

     14.  Entire Agreement.  This Agreement constitutes the entire agreement
between the parties and supersedes all prior communications, agreements and
understandings, written or oral, with respect to the terms and conditions of
Consultant's engagement.

     15.  Amendment.  This Agreement may be amended or modified only by a
written instrument signed by Consultant and by an expressly authorized
representative of the Corporation.

     16.  Headings.  The headings and captions in this Agreement are for
convenience and in no way define the scope or content of any provision of this
Agreement.

                                       8
<PAGE>

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

     18.  Governing Law.  This Agreement shall be construed and enforced under
and be governed in all respects by the laws of the State of New York, without
regard to the conflict of laws principles thereof.

                                       9
<PAGE>

     IN WITNESS WHEREOF, this Agreement has been executed as a sealed instrument
by Consultant and the Corporation, by its duly authorized representative, as of
the date first above written.

INDEPENDENT WIRELESS ONE CORPORATION

BY:  /s/ Solon L. Kandel
     -------------------
     Name:  Solon L. Kandel
     Title:  President and Chief Executive Officer

IWO HOLDINGS, INC.

BY:  /s/ Solon L. Kandel
     -------------------
     Name:  Solon L. Kandel
     Title:  President and Chief Executive Officer

CONSULTANT

/s/ J.K. Hage III
-----------------
J.K. Hage III, Esq.

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