Document:

<PAGE>

                                                                   EXHIBIT 10.37
                                                                   -------------

                          FIRST AMENDMENT TO AMENDED
                   AND RESTATED CREDIT AGREEMENT AND CONSENT

     THIS FIRST AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT AND CONSENT
(this "Agreement") dated as of the 23/rd/ day of February, 2001 (the "Agreement
       ---------                                                      ---------
Date"), by and among iPCS WIRELESS, INC. (the "Borrower"), a Delaware
----                                           --------
corporation, iPCS, INC., ("Holdings"), a Delaware corporation, iPCS EQUIPMENT,
                           --------
INC. ("Equipmentco"), a Delaware corporation (collectively with the Borrower and
       -----------
Holdings, the "Loan Parties"), the Lenders (as defined in the Credit Agreement
               ------------
defined below), and TORONTO DOMINION (TEXAS), INC., as administrative agent (the
"Administrative Agent").
 --------------------

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

     WHEREAS, the Loan Parties, the Lenders and the Administrative Agent are
parties to that certain Amended and Restated Credit Agreement dated as of July
12, 2000 (the "Credit Agreement");
               ----------------

     WHEREAS, the Borrower has requested that the Lenders, and the Lenders
have agreed to, subject to the terms hereof, amend the Credit Agreement as more
fully set forth herein; and

     WHEREAS, the Borrower has requested that the Lenders, and the Lenders have
agreed to, subject to the terms hereof, consent to the acquisition by the
Borrower of the assets relating to BTA Nos. 70 and 205 (the "Option Territory
                                                             ----------------
Acquisition) from Sprint, in accordance with Section 9.3(c)(ii)(B) of the Credit
-----------
Agreement;

     NOW, THEREFORE, in consideration of the premises set forth above, the
covenants and agreements hereinafter set forth, and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereto agree that all capitalized terms used and not defined herein
shall have the meanings ascribed thereto in the Credit Agreement, and further
agree as follows:

     1.   Amendment to Section 1.1. Section 1.1, Definitions, of the Credit
          -------------------------
Agreement, is hereby amended by deleting each of the definitions of "EBITDA" and
"Total Debt" in its entirety and by substituting in lieu thereof the following:

          "`EBITDA' means, for any period, without duplication, the sum of the
            ------
     following for the Borrower and its Consolidated Subsidiaries for such
     period determined on a consolidated basis in accordance with GAAP: (a)
     Adjusted Net Income, plus (b) Consolidated Interest Expense, plus (c)
     income and franchise taxes to the extent deducted in determining Adjusted
     Net Income, plus (d) depreciation and amortization expense and other non-
     cash items to the extent deducted in determining Adjusted Net Income, minus
     (e) non-cash income (or losses) to the extent included in determining
     Adjusted Net Income.  Notwithstanding the foregoing, for the quarter ending
     December 31, 2000,
<PAGE>

     EBITDA shall exclude expenses paid by the Borrower in connection with the
     postponed initial public offering in an amount not to exceed $1,324,000."

          "`Total Debt' means, as of any date of determination and with respect
            ----------
     to any Person and its Consolidated Subsidiaries, the aggregate principal
     amount of all Debt outstanding, determined on a consolidated basis in
     accordance with GAAP; provided, however, that the aggregate amount of any
                           --------  -------
     Debt issued at a discount shall be valued at the then accreted amount of
     such Debt at the date of determination.  The Total Debt of Holdings and
     Borrower shall not include any intercompany Debt owed to Holdings or any of
     its Wholly Owned Subsidiaries."

     2.   Amendment to Section 2.7.  Section 2.7, Mandatory Prepayments, of the
          ------------------------                ---------------------
Credit Agreement is hereby amended by deleting subsection (a) in its entirety
and by substituting in lieu thereof the following:

          "(a) Asset Dispositions, etc.  The Borrower will, within two (2)
               -----------------------
     Business Days after any Loan Party receives any Net Proceeds of any Asset
     Disposition, proceeds of any Insurance Recovery or proceeds of condemnation
     awards aggregating in excess of $1,000,000 during any calendar year (the
     amount of such Net Proceeds or proceeds exceeding $1,000,000 received
     during any such period are herein called the "Excess Proceeds Amount"), pay
     to the Administrative Agent, as a prepayment of the Loans, an aggregate
     amount equal to the Excess Proceeds Amount; provided, however, that no such
     prepayment will be required (i) if and to the extent that the Excess
     Proceeds Amount is fully re-invested in productive assets used in the
     ordinary course of such Loan Party's business within 270 days of the
     receipt of such Excess Proceeds Amount or (ii) with respect to any Excess
     Proceeds Amount arising from tower sales permitted pursuant to Section
     9.8(b) made after the effective date of the First Amendment to this
     Agreement that are not re-invested in accordance with clause (i) above,
     Excess Proceeds Amount that does not exceed $10,000,000 in the aggregate."

     3.   Amendments to Article 8.
          -----------------------

          (a)  Amendment to Section 8.1. Section 8.1, Reporting Requirements,
               ------------------------               ----------------------
of the Credit Agreement is hereby amended by deleting subsection (j) in its
entirety and by substituting in lieu thereof the following:

               "(j)  Business Plan, Material Contracts, etc.  At or prior to
                     --------------------------------------
     the end of each year, an update of the Business Plan in reasonable detail
     generally consistent with the form and substance of the Business Plan
     provided to the Administrative Agent on or before the Effective Date;
     promptly upon the Borrower's preparation thereof, any material amendment,
     modification or supplement to the Business Plan; and, in a reasonably
     prompt fashion after the creation thereof, a true and correct copy of each
     Material Contract (other than purchase orders entered into in the ordinary
     course of business) of the Loan Parties which is not identified on Schedule
                                                                        --------
     7.22;"
     ----

                                       2
<PAGE>

          (b)  Amendment to Section 8.12.  Section 8.12, Interest Rate
               -------------------------                 -------------
Protection, of the Credit Agreement is hereby amended by deleting such Section
----------
in its entirety and by substituting in lieu thereof the following:

               "Section 8.12  Interest Rate Protection.  Within six (6) months
                              ------------------------
     from the Effective Date, the Borrower will maintain in full force and
     effect through the Maturity Date one or more Interest Rate Protection
     Agreements reasonably satisfactory to the Administrative Agent with one or
     more of the Lenders or Affiliates of the Lenders or with other
     counterparties reasonably acceptable to the Administrative Agent, which
     Lenders or Affiliates or other counterparties shall in each case be rated
     in one of the two of the highest rating categories of Standard & Poors
     Corporation or Moody's Investors Services, Inc. and otherwise reasonably
     acceptable to the Administrative Agent, that enable the Borrower, for a
     period of the lesser of three years or the date ending on the earlier to
     occur of the Maturity Date or the date upon which all of the Loans have
     been paid in full and all Commitments have terminated or expired, to fix or
     place a limit on the interest rate with respect to not less than fifty
     percent (50%) of the aggregate principal amount of the Total Debt of
     Holdings and its Subsidiaries."

     4.   Amendment to Section 9.9.  Section 9.9, Sale and Leaseback, of the
          ------------------------                ------------------
Credit Agreement is hereby amended by deleting such Section in its entirety and
by substituting in lieu thereof the following:

          "Section 9.9  Sale and Leaseback.  None of the Loan Parties will enter
                        ------------------
     into any arrangement with any Person pursuant to which it leases from such
     Person real or personal Property that has been or is to be sold or
     transferred, directly or indirectly, by it to such Person, other than, (a)
     such  arrangements involving the sale and leaseback of towers consistent
     with the Business Plan as to which the aggregate rent payable during any
     calendar year shall not exceed $5,000,000, and (b) sale and leasebacks
     between Borrower and Equipmentco."

     5.   Amendments to Article 10.
          ------------------------

          (a)  Amendment to Section 10.3.  Section 10.3, Quarterly Minimum
              --------------------------                -----------------
Revenue Levels, of the Credit Agreement is hereby amended by deleting such
--------------
Section in its entirety and by substituting in lieu thereof the following:

          "Section 10.3  Quarterly Minimum Revenue Levels.  Until June 29, 2003,
                         --------------------------------
     the Borrower will not permit Gross Revenues, exclusive of any and all
     revenues attributable to the sale, lease or license of handsets,
     accessories and other inventory, for any calendar quarter during any of the
     periods set forth below to be less than the amount set forth opposite such
     date:

                                       3
<PAGE>

<TABLE>
<CAPTION>
                                Period                         Minimum Revenue Level
                                ------                         ---------------------
     <S>                                                           <C>
     From the Effective Date through September 30, 2000             $  3,180,000
     From October 1, 2000 through December 31, 2000                 $  4,970,000
     From January 1, 2001 through March 31, 2001                    $ 10,460,000
     From April 1, 2001 through June 30, 2001                       $ 14,330,000
     From July 1, 2001 through September 30, 2001                   $ 16,930,000
     From October 1, 2001 through December 31, 2001                 $ 20,540,000
     From January 1, 2002 through March 31, 2002                    $ 26,740,000
     From April 1, 2002 through June 30, 2002                       $ 30,870,000
     From July 1, 2002 through September 30, 2002                   $ 34,540,000
     From October 1, 2002 through December 31, 2002                 $ 38,690,000
     From January 1, 2003 through June 29, 2003                     $ 42,300,000"
</TABLE>

          (b)  Amendment to Section 10.4.  Section 10.4, Annualized EBITDA, of
               -------------------------                 -----------------
the Credit Agreement is hereby amended by deleting such Section in its entirety
and by substituting in lieu thereof the following:

          "Section 10.4  Annualized EBITDA.  Until June 29, 2003, the Borrower
                         -----------------
     will not permit Annualized EBITDA at the end of any calendar quarter during
     any of the periods set forth below to be less than the amount set forth
     opposite such date:

                                       4
<PAGE>

<TABLE>
<CAPTION>
                                Period                         Annualized EBITDA
                                ------                         -----------------
     <S>                                                           <C>
     From the Effective Date through September 30, 2000             ($24,270,000)
     From October 1, 2000 through December 31, 2000                 ($30,600,000)
     From January 1, 2001 through March 31, 2001                    ($38,940,000)
     From April 1, 2001 through June 30, 2001                       ($31,260,000)
     From July 1, 2001 through September 30, 2001                   ($45,250,000)
     From October 1, 2001 through December 31, 2001                 ($61,100,000)
     From January 1, 2002 through March 31, 2002                    ($50,760,000)
     From April 1, 2002 through June 30, 2002                       ($21,090,000)
     From July 1, 2002 through September 30, 2002                    ($8,510,000)
     From October 1, 2002 through December 31, 2002                 ($10,880,000)
     From January 1, 2003 through June 29, 2003                       $1,150,000"
</TABLE>

          (c)   Amendment to Section 10.5. Section 10.5, Wireless Subscribers,
                -------------------------                --------------------
of the Credit Agreement is hereby amended by deleting such Section in its
entirety and by substituting in lieu thereof the following:

          "Section 10.5  Wireless Subscribers.  Until June 29, 2003, the
                         --------------------
     Borrower will not permit Wireless Subscribers at the end of any calendar
     quarter during any of the periods set forth below to be less than the
     amount set forth opposite such date:

                                       5
<PAGE>

<TABLE>
<CAPTION>
                                Period                        Minimum Subscribers
                                ------                       --------------------
     <S>                                                           <C>
     From the Effective Date through September 30, 2000               16,000
     From October 1, 2000 through December 31, 2000                   25,600
     From January 1, 2001 through March 31, 2001                      54,900
     From April 1, 2001 through June 30, 2001                         65,700
     From July 1, 2001 through September 30, 2001                     82,600
     From October 1, 2001 through December 31, 2001                  106,600
     From January 1, 2002 through March 31, 2002                     131,200
     From April 1, 2002 through June 30, 2002                        148,200
     From July 1, 2002 through September 30, 2002                    167,200
     From October 1, 2002 through December 31, 2002                  197,600
     From January 1, 2003 through June 29, 2003                      216,600"
</TABLE>

          (d) Amendment to Section 10.6.  Section 10.6, Capital Expenditures, of
              -------------------------                 --------------------
the Credit Agreement is hereby amended by deleting such Section in its entirety
and by substituting in lieu thereof the following:

          "Section 10.6  Capital Expenditures. Until March 30, 2004, the
                         --------------------
     Borrower will not permit cumulative Capital Expenditures for the period
     beginning on January 1, 2000 and at the end of each calendar quarter during
     the periods set forth below to exceed the amount set forth opposite such
     date, provided that cumulative Capital Expenditures shall exclude, if and
     to the extent applicable, an amount equal to the net proceeds paid to the
     Borrower or any of its Consolidated Subsidiaries in connection with the
     sale of certain capital assets for which such Capital Expenditure was made,
     such sale being made pursuant to Section 9.9(a) hereof:

                                       6
<PAGE>

<TABLE>
<CAPTION>
                                                                  Cumulative Capital
                                Period                              Expenditures
                                -------                             ------------

     <S>                                                           <C>
     From the Effective Date through September 30, 2000              $  94,000,000
     From October 1, 2000 through December 31, 2000                  $ 112,880,000
     From January 1, 2001 through March 31, 2001                     $ 180,080,000
     From April 1, 2001 through June 30, 2001                        $ 217,510,000
     From July 1, 2001 through September 30, 2001                    $ 252,550,000
     From October 1, 2001 through December 31, 2001                  $ 268,160,000
     From January 1, 2002 through March 31, 2002                     $ 272,830,000
     From April 1, 2002 through June 30, 2002                        $ 276,590,000
     From July 1, 2002 through September 30, 2002                    $ 280,350,000
     From October 1, 2002 through December 31, 2002                  $ 283,820,000
     From January 1, 2003 through March 31, 2003                     $ 287,590,000
     From April 1, 2003 through June 30, 2003                        $ 291,640,000
     From July 1, 2003 through September 30, 2003                    $ 295,700,000
     From October 1, 2003 through March 30, 2004                     $ 299,470,000"
</TABLE>

          (e) Amendment to Section 10.7.  Section 10.7, Leverage Ratio, of the
              -------------------------                 --------------
Credit Agreement is hereby amended by deleting such Section in its entirety and
by substituting in lieu thereof the following:

          "Section 10.7 Leverage Ratio. The Borrower will not permit the
                        --------------
     Leverage Ratio at the end of any calendar quarter during any of the period
     set forth below to exceed the ratio set forth opposite such date:

                                       7
<PAGE>

<TABLE>
<CAPTION>
                                Period                             Leverage Ratio
                                ------                             --------------
     <S>                                                           <C>
     On June 30, 2003                                                   20.00:1

     From July 1, 2003 through September 30, 2003                       16.00:1

     From October 1, 2003 through December 31, 2003                     15.00:1

     From January 1, 2004 through December 31, 2004                      8.00:1

     From January 1, 2005 through December 31, 2005                      5.50:1

     From January 1, 2006 through December 31, 2006                      4.00:1

     From January 1, 2007 through the Maturity Date                      3.00:1"
</TABLE>

          (f) Amendment to Section 10.8.  Section 10.8, Senior Leverage Ratio,
              -------------------------                 ---------------------
of the Credit Agreement is hereby amended by deleting such Section in its
entirety and by substituting in lieu thereof the following:

          "Section 10.8  Senior Leverage Ratio. The Borrower will not permit the
                         ---------------------
     Senior Leverage Ratio at the end of any calendar quarter during any of the
     periods set forth below to exceed the ratio set forth opposite such date:

<TABLE>
<CAPTION>
                          Period                                       Senior Leverage Ratio
                          ------                                       ---------------------
     <S>                                                           <C>

     On June 30, 2003                                                                    7.00:1

     From July 1, 2003 through September 30, 2003                                        6.00:1

     From October 1, 2003 through December 31, 2003                                      5.00:1

     From January 1, 2004 through December 31, 2004                                      3.00:1

     From January 1, 2005 through the Maturity Date                                      2.00:1"
</TABLE>

          (g) Amendment to Section 10.10.  Section 10.10, Fixed Charge Coverage,
              --------------------------                  ---------------------
of the Credit Agreement is hereby amended by deleting such Section in its
entirety and by substituting in lieu thereof the following:

          "Section 10.10  Fixed Charge Coverage. The Borrower will not permit
                          ---------------------
     the ratio of (a) Annualized EBITDA for any calendar quarter during any of
     the periods ending on any of the dates set forth below to (b) Consolidated
     Fixed Charges for the immediately preceding four (4) calendar quarters, to
     be less than the ratio set forth opposite such date:

                                       8
<PAGE>

                    Period                               Fixed Charge Coverage
                    ------
                                                                 Ratio
                                                                 -----
     From January 1, 2004 through December 31, 2006             1.25:1

     From January 1, 2007 through the Maturity Date             1.50:1"

          (h) Amendment to Section 10.11.  Section 10.11, Pro Forma Debt
              --------------------------                  --------------
Service, of the Credit Agreement is hereby amended by deleting such Section in
-------
its entirety and by substituting in lieu thereof the following:

          "Section 10.11    Pro Forma Debt Service. The Borrower will not permit
                            ----------------------
     the ratio of (a) Annualized EBITDA for any calendar quarter during any of
     the periods ending on any of the dates set forth below to (b) Pro Forma
     Debt Service, to be less than the ratio set forth opposite such date:

                           Period                       Pro Forma Debt Service
                           ------                       ----------------------
     On June 30, 2003                                           1.10:1

     From July 1, 2003 through December 31, 2004                1.10:1

     From January 1, 2005 through December 31, 2005             1.10:1

     From January 1, 2006 through December 31, 2006             1.50:1

     From January 1, 2007 through December 31, 2007             1.75:1

     From January 1, 2008 through the Maturity Date             1.75:1"

     6.   Consent to the Option Territory Acquisition.  Subject to the terms and
          -------------------------------------------
conditions hereof, notwithstanding any provisions of the Loan Documents to the
contrary, the undersigned Lenders hereby consent to the consummation of the
Option Territory Acquisition and approve the revised Business Plan; provided,
that on or prior to the consummation of the Option Territory Acquisition, the
Borrower shall provide to the Administrative Agent, in form and substance
reasonably satisfactory to the Administrative Agent: (i) evidence that the
Option Territory Acquisition has been consummated on substantially the terms and
conditions set forth in Asset Purchase Agreement for the Option Territory
Acquisition; (ii) amendments to Security Documents sufficient to ensure that all
assets acquired in connection with the Option Territory Acquisition have become
part of the Collateral; (iii) the revised Business Plan of the Borrower; (iv)
evidence of the Borrower's and Holdings' compliance with Sections 10.1, 10.2,
10.3, 10.4, 10.5 and 10.6 of the Credit Agreement, after giving effect to this
Agreement and the Option Territory Acquisition; (v) certificate of a Responsible
Officer of the Borrower that a Default does not exist both before and after
giving effect to the consummation of the Option Territory

                                       9
<PAGE>

Acquisition, after giving effect to the amendments contemplated herein and (vi)
opinions of counsel, if any, relating to the consummation of the Option
Territory Acquisition.

     7.   Confirmation of Guaranties and Security Documents.  After giving
          -------------------------------------------------
effect to this Agreement and the Option Territory Acquisition: (a) Holdings
hereby acknowledges and agrees that the terms and conditions of its Guaranty
Agreement shall remain in full force and effect; (b) Equipmentco hereby
acknowledges and agrees that the terms and conditions of its Guaranty Agreement
shall remain in full force and effect; and (c) the Loan Parties hereby
acknowledge and agree that the terms and conditions of each of the Security
Documents shall remain in full force and effect.

     8.   No Other Amendment or Waiver.  Notwithstanding the agreement of the
          ----------------------------
Lenders to the terms and provisions of this Agreement, the Loan Parties
acknowledge and expressly agree that this Agreement is limited to the extent
expressly set forth herein and shall not constitute a modification of the Credit
Agreement or any other Loan Documents or a course of dealing at variance with
the terms of the Credit Agreement or any other Loan Documents (other than as
expressly set forth above) so as to require further notice by the Administrative
Agent or the Lenders, or any of them, of its or their intent to require strict
adherence to the terms of the Credit Agreement and the other Loan Documents in
the future. All of the terms, conditions, provisions and covenants of the Credit
Agreement and the other Loan Documents shall remain unaltered and in full force
and effect except as expressly modified by this Agreement. The Credit Agreement
and each other Loan Document shall be deemed modified hereby solely to the
extent necessary to effect the waivers and amendments contemplated hereby.

     9.   Representations and Warranties.  The Loan Parties hereby represent and
          ------------------------------
warrant in favor of the Administrative Agent and each Lender as follows:

          (a) Each of the Loan Parties has the corporate power and authority (i)
to enter into this Agreement and (ii) to do all other acts and things as are
required or contemplated hereunder to be done, observed and performed by them;

          (b) This Agreement has been duly and validly executed and delivered by
each of the Loan Parties that is a party thereto, and such Agreement constitutes
the legal, valid and binding obligations of such Persons, enforceable against
each such Person in accordance with their respective terms, except as limited by
bankruptcy, insolvency or other laws of general application relating to the
enforcement of creditors' rights and general principles of equity.

          (c) The execution and delivery of this Agreement and the performance
by the Loan Parties under the Credit Agreement and the other Loan Documents to
which each is a party, as amended hereby, do not and will not require the
consent or approval of any regulatory authority or governmental authority or
agency having jurisdiction over the Loan Parties or any of their Subsidiaries
which has not already been obtained, nor is in contravention of or in conflict
with the articles of incorporation, by-laws or partnership agreements of the
Loan Parties or any of their Subsidiaries, or any provision of any statute,
judgment, order, or material indenture, instrument, agreement, or undertaking to
which Loan Parties or any of their Subsidiaries is a party or by which any of
their respective assets or properties is or may become bound; and

                                       10
<PAGE>

          (d) The representations and warranties contained in Article 7 of the
Credit Agreement and contained in the other Loan Documents remain true and
correct as of the date hereof, both before and after giving effect to this
Agreement, except to the extent previously fulfilled in accordance with the
terms of the Credit Agreement or such other Loan Document, as applicable, or to
the extent relating specifically to the earlier date.  No Default now exists or
will be caused hereby.

     10.  Conditions Precedent; Effective Date.
          ------------------------------------

          (a)  the provisions set forth in Sections 1, 2, 3, 4 and 6 of this
Agreement shall be effective as of the Agreement Date subject to satisfaction of
each of the following conditions precedent:

               (i)    all of the representations and warranties of the Borrower
     under Section 9 hereof which are made as of the date hereof, being true and
     correct in all material respects; and

               (ii)   receipt by the Administrative Agent of counterparts hereof
     executed by the Required Lenders and each of the Loan Parties.

          (b)  the provisions of Section 5 of this Agreement shall be effective
upon consummation of the Option Territory Acquisition subject to satisfaction of
each of the following conditions precedent:

               (i)    all of the representations and warranties of the Borrower
     under Section 9 hereof which are made as of the date hereof, being true and
     correct in all material respects;

               (ii)   receipt by the Administrative Agent, on behalf of the
     Lenders executing and delivering this Agreement on or before February 23,
     2001, of an amendment fee in the amount of 0.125% of the aggregate
     Commitments of such Lenders (such sum, the "Amendment Fee"), which
                                                 -------------
     Amendment Fee shall be fully earned when due and non-refundable when paid;

               (iii)  receipt by the Administrative Agent of counterparts hereof
     executed by the Required Lenders and each of the Loan Parties; and

               (iv)   satisfaction of each of the conditions to the Consent set
     forth in Section 6 hereof.

     11.  Counterparts.  This Agreement may be executed in any number of
          ------------
counterparts, each of which shall be deemed to be an original, but all such
separate counterparts shall together constitute one and the same instrument.

     12.  Loan Documents.  Each reference in the Credit Agreement or any other
          --------------
Loan Document to the term "Credit Agreement" shall hereafter mean and refer to
the Credit Agreement as amended hereby and as the same may hereafter be amended.

                                       11
<PAGE>

     13.  Governing Law.  This Agreement shall be construed in accordance with
          -------------
and governed by the internal laws of the State of New York, applicable to
agreements made and to be performed in New York.

     14.  Severability.  Any provision of this Agreement which is prohibited or
          ------------
unenforceable in any jurisdiction shall be ineffective to the extent of such
prohibition or unenforceability without invalidating the remaining provisions
hereof in that jurisdiction or affecting the validity or enforceability of such
provision in any other jurisdiction.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                                       12
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement or
caused it to be executed under seal by their duly authorized officers, all as of
the day and year first above written.

BORROWER:                     iPCS WIRELESS, INC.,
                              a Delaware corporation

                              By:  /s/ Tim Yager
                                   -----------------------------------
                              Name:   Tim Yager
                              Title:  President & CEO

HOLDINGS:                     iPCS, INC., a Delaware corporation

                              By:  /s/ Tim Yager
                                   -----------------------------------
                              Name:   Tim Yager
                              Title:  President and CEO

EQUIPMENTCO:                  iPCS EQUIPMENT, INC.,
                              a Delaware corporation

                              By:  /s/ Tim Yager
                                   -----------------------------------
                              Name:   Tim Yager
                              Title:  President and CEO

<PAGE>

ADMINISTRATIVE AGENT
AND LENDERS:                  TORONTO DOMINION (TEXAS), INC., as
                              Administrative Agent and as a Lender

                              By:  /s/ Jeffrey R. Lents
                                   -------------------------------------
                              Name:  Jeffrey R. Lents
                              Title: Vice President

<PAGE>

                              GE CAPITAL CORPORATION, as a Lender

                              By:  /s/ Angela LePore
                                   -----------------------------------
                              Name:  Angela LePore
                              Title: Manager, Portfolio Compliance

<PAGE>

                              THE BANK OF NOVA SCOTIA, as a Lender

                              By:  /s/ Ian A. Hodgart
                                   -----------------------------------
                              Name:  Ian A. Hodgart
                              Title  Authorized Signatory

<PAGE>

                              BANK OF TOKYO-MITSUBISHI TRUST
                              COMPANY, as a Lender

                              By:  /s/ Michael J. Wiskind
                                   -----------------------------------
                              Name:  Michael J. Wiskind
                              Title: Vice President

<PAGE>

                              CITY NATIONAL BANK, as a Lender

                              By:  /s/ Aaron Cohen
                                   ------------------------------------
                              Name:  Aaron Cohen
                              Title: Vice President

<PAGE>

                              FORTIS CAPITAL CORP., as a Lender

                              By:  /s/ Svein Engh
                                   ---------------------------------
                              Name:  Svein Engh
                              Title: Managing Director

                              By:  /s/ Colm Kelly
                                   ---------------------------------
                              Name:  Colm Kelly
                              Title: Assistant Vice President

<PAGE>

                              IBM CREDIT CORPORATION, as a Lender

                              By:  /s/ Thomas S. Curcio
                                   ------------------------------------------
                              Name:  Thomas S. Curcio
                              Title: Manager of Credit, Commercial and
                                     Specialty Financing

<PAGE>

                              NATIONAL CITY BANK, as a Lender

                              By:  /s/ Christian Kalmbach
                                   ----------------------------------------
                              Name:  Christian Kalmbach
                              Title: Vice President

<PAGE>

                              PNC BANK, NATIONAL ASSOCIATION, as a
                              Lender

                              By:  /s/ Keith R. White
                                   -------------------------------------
                              Name:  Keith R. White
                              Title: Vice President<PAGE>

                                                                   EXHIBIT 10.38
                                                                   -------------

[*]  IMPORTANT NOTE: Certain material, indicated by four asterisks ("****"), has
been omitted from this document pursuant to a request for confidential
treatment. The omitted material has been filed separately with the Securities
and Exchange Commission.

                                AMENDMENT NO. 2
                                      TO
                1900 CDMA ADDITIONAL AFFILIATE SUPPLY AGREEMENT
                                    BETWEEN

                              iPCS WIRELESS, INC.
                                      AND
                             iPCS EQUIPMENT, INC.
                                      AND
                             NORTEL NETWORKS INC.

This Amendment is made effective this 9th day of February, 2001, by and between
iPCS Wireless, Inc. and iPCS Equipment, Inc. (hereinafter referred to as
"Buyer"), both being Delaware corporations with offices located at 1900 East
Golf Road, Suite 900, Schaumburg, Illinois 60173 and Nortel Networks Inc., a
Delaware corporation with offices at 2221 Lakeside Blvd., Richardson, Texas
75082-4399 (hereinafter referred to as "Seller").

WHEREAS, iPCS Wireless, Inc., as successor in interest to Illinois PCS, LLC, and
Seller entered into a Sprint Additional Affiliate Supply Agreement on May 24,
1999 ("Agreement"); and,

WHEREAS, Buyer wishes to terminate the Agreement, and Seller is in agreement to
terminate the Agreement, based upon certain terms and conditions;

NOW, THEREFORE, in consideration of the mutual covenants herein contained, Buyer
and Seller agree to amend the Agreement as follows:

                                      -1-
<PAGE>

1.   Buyer and Seller agree to terminate this Agreement effective February 9,
     2001 and hereby amend this Agreement prior to its termination to include
     the following terms and conditions, that will survive the termination of
     the Agreement:

     1.1  Buyer is hereby granted a purchase credit in the amount of $****
          ("Purchase Credit") to be used toward the purchase and licensing of
          Equipment and Services pursuant to an accepted Purchase Order under
          this Agreement only and contingent upon all of the following
          conditions: (1) Buyer shall issue its final Purchase Order under the
          Agreement on or before February 9, 2001 to which Purchase Order such
          Purchase Credit shall be applied. Such final Purchase Order shall be
          in the net amount of $885,354.00 (Eight Hundred Eighty Five Thousand,
          Three Hundred Fifty Four Dollars), after application of the Purchase
          Credit, and will thereby satisfy Buyer's Volume Commitment. (2) Buyer
          agrees that any new business expansion, as described herein, in the
          **** and **** Sprint PCS markets, shall be awarded to Seller under
          separate contract. Buyer represents that preliminary analysis
          indicates the magnitude of this new expansion is approximately 40
          additional BTSs and a small wireless switch and that the new expansion
          will likely expand the switch capacity requirement to approximately
          100 sites. Buyer agrees that it shall purchase the required wireless
          networking systems and base stations from Seller for these markets. It
          is understood this new expansion and the subsequent awarding of new
          business to Seller is contingent upon Sprint PCS' awarding of the
          markets to Buyer and Buyer's acceptance of these markets. (3) Buyer
          further agrees that it shall issue a purchase order to

[****] CERTAIN PORTIONS INDICATED BY "****" HAVE BEEN OMITTED PURSUANT TO A
REQUEST FOR CONFIDENTIAL TREATMENT AND FILED SEPARATELY WITH THE COMMISSION.

                                 -2-
<PAGE>

          Seller subsequent to termination of this Agreement, but no later
          than February 12, 2001 in the net amount of $13,582,562.00 (Thirteen
          Million, Five Hundred Eighty Two Thousand, Five Hundred Sixty Two
          Dollars) for equipment and services to be shipped not later than
          December 31, 2001. Such purchase order shall be issued under the
          SprintCom Amended and Restated PCS CDMA Product Supply Contract dated
          June 4, 1999 ("Sprint PCS Contract") as it relates to Affiliate
          purchases, contingent upon Buyer being recognized by Sprint PCS as an
          Additional Affiliate thereunder and shall be non-cancelable. Should
          Buyer fail to fulfill any of the above three stated conditions, then
          Buyer shall refund to Seller the entire $**** Purchase Credit
          within thirty (30) days after receipt of Seller's written request
          therefor.

     1.2  Including the additional agreements or provisions provided in this
          Amendment, Buyer acknowledges its obligations for receipt, acceptance,
          and payment for all goods and services provided under this Agreement.

2.   Except as specifically modified by this Amendment No. 2, the Agreement in
     all other respects shall continue in full force and effect until its
     termination effective as of February 9, 2001.  Any provisions of the
     Agreement, as amended, which by their nature extend beyond its termination
     or by their sense and context are intended to survive termination, shall
     remain in effect beyond such termination until fulfilled and shall apply to
     either party's successors and/or permitted assigns.  This Amendment shall
     be binding on any successors or permitted assigns of Buyer.

                      (Next paragraph begins on next page)

[****] CERTAIN PORTIONS INDICATED BY "****" HAVE BEEN OMITTED PURSUANT TO A
REQUEST FOR CONFIDENTIAL TREATMENT AND FILED SEPARATELY WITH THE COMMISSION.

                                      -3-
<PAGE>

IN WITNESS WHEREOF, the parties have caused this Amendment No. 2 to be signed by
their duly authorized representatives and effective as of the date first set
forth above.

iPCS WIRELESS, INC.                        NORTEL NETWORKS INC.

By:    /s/  Anthony R. Muscato             By:   /s/ Randy Dodd
    -------------------------------            --------------------------

Name:    Anthony R. Muscato                    Name:        Randy Dodd
      -----------------------------                     -----------------
           (Type/Print)                                  (Type/Print)

Title:    Senior VP & CTO                  Title:   MAVP Nortel
       ----------------------------                 ---------------------

Date:   February 22, 2001                  Date:   February 28, 2001
       ----------------------------                ----------------------

iPCS EQUIPMENT, INC.

By:   /s/  Anthony R. Muscato
      -----------------------------

Name:   Anthony R. Muscato
        ---------------------------
             (Type/Print)

Title:    Senior VP & CTO
       ----------------------------

Date:   February 28, 2001
      -----------------------------

                                      -4-

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