Exhibit 10.56

CONFIDENTIAL COMMUNICATION PURSUANT TO THE MANAGEMENT AGREEMENT SECTION 14.1.5, RULE 408 OF THE FEDERAL RULES OF EVIDENCE AND ALL OTHER APPLICABLE
PROTECTIONS

LIMITED WAIVER AND CONSENT AGREEMENT

This Limited Waiver and Consent Agreement, dated March 3, 2008 (the "Agreement"), is made and entered into by and between Sprint Nextel Corporation
(formerly known as "Sprint Corporation"), Sprint Spectrum L.P., WirelessCo L.P., Sprint Communications Company L.P., Sprint Telephony PCS, L.P., and Sprint PCS License,
L.L.C. (collectively, "Sprint"); iPCS Wireless, Inc. ("iPCS Wireless"), Horizon Personal Communications, Inc. ("Horizon"), Bright Personal Communications Services, L.L.C. ("Bright") and
iPCS, Inc. (collectively with iPCS Wireless, Horizon and Bright, "iPCS).

RECITALS

A.    iPCS
Wireless and certain of the Sprint entities referenced above are parties to a Sprint PCS Management Agreement, dated as of January 22, 1999, as amended (the
"iPCS Wireless Management Agreement"). Horizon and certain of the Sprint entities referenced above are parties to a Sprint PCS Management Agreement, dated as of June 8, 1998, as amended (the
"Horizon Management Agreement"). Bright and certain of the Sprint entities referenced above are parties to a Sprint PCS Management Agreement, dated as of October 13, 1999, as amended (the
"Bright Management Agreement" and together with the iPCS Wireless Management Agreement and the Horizon Management Agreement, the "Management Agreements"). iPCS Wireless, Horizon and Bright are direct
or indirect wholly owned subsidiaries of iPCS, Inc.

B.    Sprint
and iPCS entered into the Sprint/iPCS Forbearance Agreement, dated July 28, 2005, which agreement was amended by Amendment No. 1 to Sprint/iPCS
Forbearance Agreement, dated as of December 12, 2005 (as amended, the "Forbearance Agreement").

C.    Sprint
is prohibited by the Forbearance Agreement from taking certain actions in the Service Area.

D.    Sprint's
continued compliance with the Forbearance Agreement and with the final order and judgment of the Delaware Court (as defined below) are conditions to the Stay of
Judgment Pending Appeal ordered by the Appellate Court of Illinois on October 13, 2006.

E.    Sprint
and iPCS have reached agreement as to certain matters, which agreements are set forth in Addendum X to Sprint PCS Management Agreement and Sprint PCS Services
Agreement, dated March 3, 2008, among Sprint Spectrum L.P., SprintCom, Inc., WirelessCo, L.P., Sprint Communications Company L.P and iPCS Wireless, Inc.; Addendum IX
to Sprint PCS Management Agreement and Sprint PCS Services Agreement, dated March 3, 2008, among Sprint Spectrum L.P., SprintCom, Inc., WirelessCo, L.P.,
PhillieCo, L.P., APC PCS, LLC, Sprint Communications Company L.P. and Horizon Personal Communications, Inc.; and Addendum V to Sprint PCS Management Agreement and Services
Agreement, dated March 3, 2008, among Sprint Spectrum L.P., SprintCom, Inc., WirelessCo, L.P., Sprint Communications Company L.P. and Bright Personal Communications
Services, LLC (collectively, the "Amendments").

F.     In
consideration for the Amendments, iPCS desires to waive compliance by Sprint with certain provisions of the Forbearance Agreement as described herein.

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AGREEMENT

In consideration of the recitals and mutual covenants and agreements contained in this Agreement, the sufficiency of which consideration is hereby acknowledged,
the parties, intending to be bound, agree as follows:

ARTICLE I
DEFINITIONS

1.1Certain Definitions.The following terms are used in this Agreement with the meanings assigned below:





1.2Other Capitalized Terms.Capitalized terms used but not defined herein shall have the meanings assigned to
them in the Forbearance Agreement and the Management Agreements.

ARTICLE II  WAIVERS

2.1Ensemble Billing Platform.From and after the date that iPCS's migration to the Ensemble billing platform
has been completed, and notwithstanding anything to the contrary in the Forbearance Agreement:



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2.2National Accounts.Notwithstanding anything to the contrary in the Forbearance Agreement, iPCS hereby
acknowledges that Sprint shall no longer be required to maintain separate and distinct "national account" programs, including separate national account sales forces for its CDMA Products and Services
and its iDEN Products and Services for national accounts headquartered in the Service Area. Sprint hereby grants iPCS the right to approve any discounted pricing to any "national account"
headquartered in its Service Area that affects CDMA Customers in the Service Area, which approval shall not be unreasonably withheld. This practice is consistent with the long standing course of
dealing
between the parties. Accordingly, iPCS hereby grants Sprint a limited waiver from Sprint's obligation in Section 2.8 of the Forbearance Agreement.

2.3General Motors.Notwithstanding anything to the contrary in the Forbearance Agreement, iPCS hereby grants
Sprint a limited waiver from the obligations imposed on Sprint by Section 2.3 of the Forbearance Agreement, to the extent required to permit to enter into a national account with General Motors
and its Related Parties as contemplated by Section 5 of the Amendments.

2.4NASCAR Branding.iPCS hereby acknowledges that Sprint is permitted to display Sprint, Nextel, Xohm and Boost
advertising and brands at NASCAR events held in the Service Area in substantially the same manner as Sprint displays such advertising and brands at NASCAR events held outside the Service Area and that
nothing in the Forbearance Agreement should be interpreted as contrary to this acknowledgment.

ARTICLE III    TERMS OF GENERAL APPLICABILITY

3.1Limited Waiver; Duration.Except as expressly waived herein, the Forbearance Agreement remains in full force
and effect. The limited waivers granted herein shall remain in place for so long as Sprint continues to comply with the Forbearance Agreement.

3.2No Release, Waiver or Modification of the Parties Rights and Remedies in the Ongoing Litigation.Nothing in
this Agreement, or in any of its terms, including but not limited to, the limited waivers granted in this Agreement, shall in any way be considered a waiver, release, modification or amendment of the
rights and remedies of the parties as asserted in or pursued in the Ongoing Litigation, nor shall it be considered in any way to affect the rights and/ or ability of the parties to fully pursue their
rights and/or remedies as asserted in the Ongoing Litigation. Further, nothing in this Agreement shall, in any way, be considered a waiver, release, modification or amendment of the rights of the
parties to enforce any order or judgment of any court entered in, or to be entered in, the Ongoing Litigation.

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3.3No Breach of Management Agreements.This Agreement, and the covenants of Sprint contained herein, do not
constitute an admission by Sprint that it has breached, or will breach, any provision of the Management Agreements, nor does this Agreement, or any of its terms or provisions, constitute an admission
by Sprint or iPCS as to the scope of any party's rights or obligations under the Management Agreements. Moreover, the provisions of this Agreement are not intended in any way to constitute an
admission by Sprint or iPCS that any of its actions under this Agreement were necessary to comply with or avoid any breach of the Management Agreements. This Agreement is (a) being entered into
for the purpose of resolving certain differences and possible disputed claims between the parties and (b) entitled to all protections afforded by rules of evidence applicable in Illinois and
Delaware (as applicable) analogous to Federal Rule of Evidence 408.

3.4Entire Agreement.This Agreement sets forth the entire agreement and understanding between the parties as to
the subject matter of this Agreement and supersedes all prior agreements, oral or written, and other communications between the parties relating to the subject matter of this Agreement; provided that
this Agreement is not intended to amend or affect in any way the Management Agreements and any other agreements entered into in connection with the Management Agreements.

3.5Binding Effect.Except as otherwise provided in this Agreement, this Agreement is binding upon and inures to
the benefit of the parties and their respective and permitted successors, transferees, and assigns, including any permitted successor, transferee or assignee of the Service Area Network or of the
License.

3.6Governing Law.The internal laws of the State of Delaware (without regard to principles of conflicts of law)
govern the validity of this Agreement, the construction of its terms, and the interpretation of the rights and duties of the parties.

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IN WITNESS WHEREOF, the parties have caused this Limited Waiver and Consent Agreement to be executed by their respective officers as of
the date first above written.

| |  | SPRINT NEXTEL CORPORATION        
| |  | ---------------------------------
| |  | By:                              
| |  | Name:                            
| |  | Title:                           
| |  | SPRINT SPECTRUM L.P.             
| |  | By:                              
| |  | Name:                            
| |  | Title:                           
| |  | WIRELESSCO L.P.                  
| |  | By:                              
| |  | Name:                            
| |  | Title:                           
| |  | SPRINT COMMUNICATIONS COMPANY LP.
| |  | By:                              
| |  | Name:                            
| |  | Title:                           
| |  | SPRINT TELEPHONY PCS, L.P.       
| |  | By:                              
| |  | Name:                            
| |  | Title:                           
| |  | SPRINT PCS LICENSE, L.L.C.       
| |  | By:                              
| |  | Name:                            
| |  | Title:                           
| |  |                                  

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| |  | iPCS, INC.                                  
| |  | --------------------------------------------
| |  | By:                                         
| |  | Name:                                       
| |  | Title:                                      
| |  | iPCS WIRELESS, INC.                         
| |  | By:                                         
| |  | Name:                                       
| |  | Title:                                      
| |  | HORIZON PERSONAL COMMUNICATIONS, INC.       
| |  | By:                                         
| |  | Name:                                       
| |  | Title:                                      
| |  | BRIGHT PERSONAL COMMUNICATIONS SERVICES, LLC
| |  | By:                                         
| |  | Name:                                       
| |  | Title:                                      

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