Document:

EX-4.1

 EXHIBIT 4.1 

THIRTY-EIGHTH SUPPLEMENTAL INDENTURE 

THIRTY-EIGHTH SUPPLEMENTAL INDENTURE (this “Thirty-Eighth Supplemental Indenture”), dated as of December 20, 2018, among T-Mobile USA, Inc., a Delaware corporation (the “Company”), the Guarantors party hereto and Deutsche Bank Trust Company Americas, a New York banking corporation, as trustee (the
“Trustee”). 
 W I T N E S S E T H 

WHEREAS, the Company has heretofore executed and delivered the Indenture, dated as of April 28, 2013 (the “Base
Indenture”), among the Company, the guarantors party thereto and the Trustee, as modified and supplemented in respect of the Senior Reset Notes due 2023 (the “2023 Senior Notes”) and the Guarantees thereof by the Fifth
Supplemental Indenture, dated as of April 28, 2013, among the Company, the guarantors party thereto and the Trustee (the “Fifth Supplemental Indenture”), as modified and supplemented in respect of the 4.000% Senior Notes due 2022-1 (the “2022 Senior Notes”) and the Guarantees thereof by the Twenty-Sixth Supplemental Indenture, dated as of April 27, 2017, among the Company, the guarantors party thereto and the
Trustee (the “Twenty-Sixth Supplemental Indenture”), as modified and supplemented in respect of the 5.125% Senior Notes due 2025-1 (the “2025 Senior Notes”) and the Guarantees
thereof by the Twenty-Seventh Supplemental Indenture, dated as of April 28, 2017, among the Company, the guarantors party thereto and the Trustee (the “Twenty-Seventh Supplemental Indenture”), as modified and supplemented in
respect of the 5.375% Senior Notes due 2027-1 (the “2027 Senior Notes”) and the Guarantees thereof by the Twenty-Eighth Supplemental Indenture, dated as of April 28, 2017, among the
Company, the guarantors party thereto and the Trustee (the “Twenty-Eighth Supplemental Indenture”), as modified and supplemented in respect of the 4.500% Senior Notes due 2026-1 (the
“2026 Senior Notes”) and the Guarantees thereof by the Thirty-Fifth Supplemental Indenture, dated as of April 30, 2018, among the Company, the guarantors party thereto and the Trustee (the “Thirty-Fifth Supplemental
Indenture”), as modified and supplemented in respect of the 4.750% Senior Notes due 2028-1 (the “2028 Senior Notes”, and together with the 2026 Senior Notes, the “2018
Notes”, and the 2028 Senior Notes together with the 2022 Senior Notes, 2025 Senior Notes, 2027 Senior Notes, 2026 Senior Notes, the “Post-2017 Notes”, and the Post-2017 Notes collectively with the 2023 Senior Notes, the
“Subject Notes”) and the Guarantees thereof by the Thirty-Sixth Supplemental Indenture, dated as of April 30, 2018, among the Company, the guarantors party thereto and the Trustee (the “Thirty-Sixth Supplemental
Indenture”, and together with the Twenty-Sixth Supplemental Indenture, Twenty-Seventh Supplemental Indenture, Twenty-Eighth Supplemental Indenture and Thirty-Fifth Supplemental Indenture, the “Post-2017 Supplemental
Indentures”, and the Post-2017 Supplemental Indentures together with the Fifth Supplemental Indenture, the “Notes Supplemental Indentures”) (the Base Indenture, as modified and supplemented by the Fifth Supplemental
Indenture with respect to the 2023 Senior Notes, is referred to herein as the “Pre-2017 Indenture”; as modified and supplemented by each Post-2017 Supplemental Indenture with respect to each
Series of Post-2017 Notes, is referred to as the “Post-2017 Indenture”; and as modified and supplemented by each Notes Supplemental Indenture with respect to each Series of Subject Notes, is referred to as the
“Indenture”). 

 WHEREAS, on April 29, 2018, T-Mobile US, Inc.,
a Delaware corporation (“T-Mobile”), Sprint Corporation, a Delaware corporation (“Sprint”), Huron Merger Sub LLC, a Delaware limited liability company and a wholly owned
subsidiary of the Company (“Merger Company”), Superior Merger Sub Corporation, a Delaware corporation and a wholly owned subsidiary of Merger Company (“Merger Sub”), Galaxy Investment Holdings, Inc., a Delaware
corporation (“Galaxy”), Starburst I, Inc., a Delaware corporation (“Starburst” and, together with Galaxy, the “SoftBank US HoldCos”), and, for the limited purposes of the covenants and
representations set forth therein that are expressly obligations of such persons, Deutsche Telekom AG, an Aktiengesellschaft organized and existing under the laws of the Federal Republic of Germany (“Deutsche Telekom”),
Deutsche Telekom Holding B.V., a besloten vennootschap met beperkte aansprakelijkheid organized and existing under the laws of the Netherlands, and SoftBank Group Corp., a Japanese kabushiki kaisha, entered into a Business Combination
Agreement (as it may be amended, supplemented or modified from time to time, the “Business Combination Agreement”), pursuant to which (i) the SoftBank US HoldCos may merge with and into Merger Company, with Merger Company
continuing as the surviving entity and as a wholly owned subsidiary of T-Mobile (the “HoldCo Mergers”) and (ii) Merger Sub will merge with and into Sprint, with Sprint as the surviving
corporation and a wholly owned direct or indirect subsidiary of T-Mobile (the “Sprint Merger” and, together with the HoldCo Mergers (if they occur), the “Mergers”), in each
case on the terms and subject to the conditions set forth in the Business Combination Agreement. 
 WHEREAS, following the Mergers, T-Mobile is expected to contribute Sprint to the Company or otherwise cause Sprint to become a direct or indirect wholly-owned subsidiary of the Company (the “Contribution” and, collectively with
the Mergers, the “T-Mobile/Sprint Transaction”). 
 WHEREAS, Section 9.02 of
the Indenture provides, among other things, that the Company, the Guarantors and the Trustee may amend or supplement the Indenture as it relates to any Series of Notes with the consent of the Holders of the Notes of such Series then outstanding;

 WHEREAS, with respect to the Pre-2017 Indenture as it relates to the 2023 Senior Notes, the
Company desires to amend and supplement, as applicable, (1) Section 1.01 of the Pre-2017 Indenture and (2) Section 4.09(b)(1) of the Pre-2017
Indenture (collectively, the “Ratio Secured Debt Amendments”), in each case on the terms set forth herein; 
 WHEREAS, with
respect to the Indenture as it relates to each Series of Subject Notes, the Company desires to amend and supplement, as applicable, (1) Section 1.01 of the Indenture, (2) Section 4.08 of the Indenture, (3) Section 4.09
of the Indenture, and (4) Section 4.17(a) of the Indenture (collectively, the “Existing Sprint Spectrum and GAAP Amendments”), in each case on the terms set forth herein; 

WHEREAS, with respect to the Indenture as it relates to the 2025 Notes and the 2027 Notes, the Company desires to make certain additional
amendments to the maturity dates thereof, and to the redemption provisions of the 2025 Notes (the “2025/2027 Amendments”); 

  
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 WHEREAS, in connection with the entry into the Business Combination Agreement, Deutsche
Telekom and T-Mobile USA entered into a financing matters agreement, dated as of April 29, 2018 (the “Financing Matters Agreement”), pursuant to which, among other things,
(1) Deutsche Telekom, as holder of 100% of the 2023 Senior Notes, agreed to the Ratio Secured Debt Amendments with respect to the 2023 Senior Notes, (2) Deutsche Telekom, as holder of 100% of each series of Subject Notes, agreed to the
Existing Sprint Spectrum and GAAP Amendments with respect to each series of the Subject Notes, and (3) Deutsche Telekom, as holder of 100% of the 2025 Notes and 2027 Notes, and the Company agreed to enter into the 2025/2027 Amendments; 

WHEREAS, the Company has satisfied all conditions precedent and covenants provided under the applicable Indenture to enable the Trustee to
enter into this Thirty-Eighth Supplemental Indenture; and 
 WHEREAS, all things necessary to make this Thirty-Eighth Supplemental Indenture
a valid, binding and enforceable agreement of the Company, the Guarantors and the Trustee and a valid amendment to the Notes Supplemental Indentures have been done; 

NOW, THEREFORE, the Company, the Guarantors and the Trustee agree as follows for the benefit of each other and for the equal and ratable
benefit of the Holders of the Notes as follows: 
 1. Capitalized Terms. All capitalized terms which are used herein and not
otherwise defined herein are defined in the applicable Indenture and are used herein with the same meanings as the applicable Indenture. If a capitalized term is defined both in the applicable Indenture and this Thirty-Eighth Supplemental Indenture,
the definition in this Thirty-Eighth Supplemental Indenture shall apply to the amendment established hereby. 
 2. Amendments.
Effective immediately prior to (and subject in all respects to) the consummation of the T-Mobile/Sprint Transaction: 

Section 1.01 of the Pre-2017 Indenture as it relates to the 2023 Senior Notes is hereby amended
by adding the following definition: 
 “Secured Debt to Cash Flow Ratio” means, with respect to any Person
as of any date of determination, the ratio of (a) the Consolidated Indebtedness of such Person as of such date that is secured by a Lien, less cash and Cash Equivalents, to (b) the Consolidated Cash Flow of such Person for the four most
recent full fiscal quarters ending immediately prior to such date for which internal financial statements are available. 

For purposes of making the computation referred to above, the Secured Debt to Cash Flow Ratio shall be calculated on a pro
forma basis in the manner described in the second paragraph of the definition of “Debt to Cash Flow Ratio.” 

  
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 Section 4.09(b)(1) of the Pre-2017 Indenture as
it relates to the 2023 Senior Notes is hereby deleted in its entirety and replaced with the following: 
 (1) the incurrence
by the Company and any Subsidiary Guarantor of (a) additional Indebtedness under Credit Facilities, provided that giving effect to such incurrence, the aggregate principal amount (with letters of credit being deemed to have a principal amount
equal to the maximum potential liability of the Company and its Restricted Subsidiaries thereunder) of all Indebtedness under Credit Facilities then outstanding under this paragraph (1), together with any Indebtedness incurred pursuant to the
following clause (b), does not exceed the greater of (x) $9.0 billion and (y) an amount such that, upon the incurrence of Indebtedness under this clause (1), the Secured Debt to Cash Flow Ratio of the Company and its Subsidiaries for the
most recently ended four full fiscal quarters for which financial statements are available, calculated on a pro forma basis in the manner described in the definition of “Secured Debt to Cash Flow Ratio,” shall not exceed 2.00:1.00;
provided that for purposes of determining the amount of Indebtedness that may be incurred under this clause (a)(y), all Indebtedness incurred under this clause (1) shall be treated as Consolidated Indebtedness that is secured by a Lien and
(b) without duplication, all Indebtedness incurred to renew, refund, refinance, replace, defease or discharge any Indebtedness incurred pursuant to the foregoing clause (a); provided, however, that the maximum amount permitted under this clause
(1) shall not be deemed to limit additional Indebtedness under the Credit Facilities to the extent that the incurrence of such additional Indebtedness is permitted pursuant to any of the other provisions of this covenant; 

Section 1.01 of the Indenture as it relates to each Series of Subject Notes is hereby amended by adding the following definitions: 

“Existing Sprint Spectrum Financing Documents” means each agreement, instrument or other document entered into
or delivered from time to time in connection with the Existing Sprint Spectrum Notes Program, including without limitation the Existing Sprint Spectrum Notes, the Existing Sprint Spectrum Indenture, the Intra-Company Spectrum Lease Agreement, dated
as of October 27, 2016, among certain of the Existing Sprint Spectrum Subsidiaries, Sprint Communications, Inc., and the other parties thereto, and each “Transaction Document” (as defined in the Existing Sprint Spectrum Indenture),
each as amended, supplemented or otherwise modified from time to time. 
 “Existing Sprint Spectrum
Indenture” means the Indenture, dated as of October 27, 2016, by and among Sprint Spectrum Co LLC, Sprint Spectrum Co II LLC, Sprint Spectrum Co III LLC, and Deutsche Bank Trust Company Americas, as trustee, as amended, supplemented or
otherwise modified from time to time, including as supplemented with respect to each series of Existing Sprint Spectrum Notes. 

“Existing Sprint Spectrum Issuers” means Sprint Spectrum Co LLC, Sprint Spectrum Co II LLC, Sprint Spectrum Co
III LLC, and their successors and assigns. 
 “Existing Sprint Spectrum Notes” means the Existing Sprint
Spectrum Issuers’ Series 2018-1 4.738% Senior Secured Notes, Class A-1, Series 2018-1 5.152% Senior Secured Notes, Class A-2, Series 2016-1 3.360% Senior Secured Notes, Class A-1, and 

  
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any other note or series of notes issued under the Existing Sprint Spectrum Indenture from time to time, in an aggregate principal amount outstanding for all of the foregoing not to exceed the
Existing Sprint Spectrum Program Cap at any time. 
 “Existing Sprint Spectrum Program” means the
transactions contemplated by the Existing Sprint Spectrum Financing Documents, including the issuance of any Existing Sprint Spectrum Notes. 

“Existing Sprint Spectrum Program Cap” means $7,000,000,000. 

“Existing Sprint Spectrum Subsidiary” means any of Sprint Spectrum Depositor LLC, Sprint Spectrum Depositor II
LLC, Sprint Spectrum Depositor III LLC, Sprint Intermediate HoldCo LLC, Sprint Intermediate HoldCo II LLC, Sprint Intermediate HoldCo III LLC, Sprint Spectrum PledgeCo LLC, Sprint Spectrum PledgeCo II LLC, Sprint Spectrum PledgeCo III LLC, each
Existing Sprint Spectrum Issuer, Sprint Spectrum License Holder LLC, Sprint Spectrum License Holder II LLC and Sprint Spectrum License Holder III LLC, their successors and assigns, and any Subsidiary of the foregoing. 

Section 1.01 of the Indenture as it relates to each Series of Subject Notes (other than each Series of 2018 Notes) is hereby amended by
replacing the definitions of the following defined terms in their entirety with the following: 
 “Capital Lease
Obligation” means, at the time any determination is to be made, the amount of the liability in respect of a capital lease that would at that time be required to be capitalized on a balance sheet prepared in accordance with GAAP, and the
Stated Maturity thereof shall be the date of the last payment of rent or any other amount due under such lease prior to the first date upon which such lease may be prepaid by the lessee without payment of a penalty (provided that obligations either
existing on the Issue Date or created thereafter that (a) initially were not included on the consolidated balance sheet of the Company as capital lease obligations and were subsequently recharacterized as capital lease obligations or
(b) did not exist on the Issue Date and were required to be characterized as capital lease obligations but would not have been required to be treated as capital lease obligations on the Issue Date had they existed at that time, shall for all
purposes not be treated as Capital Lease Obligations or Indebtedness). 
 “GAAP” means generally accepted
accounting principles as in effect on the date of any calculation or determination required under the Notes of this Series or the Indenture. Notwithstanding the foregoing, at any time, (i) the Company may elect to apply IFRS accounting
principles in lieu of GAAP and, upon any such election, references herein to GAAP or parts of the Accounting Standards Codification or “ASC” shall thereafter be construed to mean IFRS (except as otherwise provided in the Indenture);
provided that any such election, once made, shall be irrevocable; provided, further, that any calculation or determination in the Indenture that requires the application of GAAP for periods that include fiscal quarters ended prior to the
Company’s election to apply IFRS shall remain as previously calculated or determined in accordance with GAAP and (ii) the Company, on any date, may elect to establish that GAAP shall mean GAAP as in effect on such date;

  
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provided that any such election, once made, shall be irrevocable. The Company shall give notice of any such election made in accordance with this definition to the Trustee and the Holders of
Notes of this Series. 
 “Permitted Business” means those businesses in which the Company and its
Subsidiaries were engaged on the Closing Date, or any business similar, related, incidental or ancillary thereto or that constitutes a reasonable extension or expansion thereof, or any business reasonably related to the telecommunications industry,
and the acquisition, holding or exploitation of any license relating to the delivery of those services, or the transactions entered into in connection with the Existing Sprint Spectrum Program. 

The definition of “Permitted Liens” in Section 1.01 of the Indenture as it relates to each Series of Subject Notes is hereby
amended by deleting clause (30) in its entirety and replacing it with the following: 

(30)    Liens, if any, incurred in connection with the Towers Transaction or the Existing Sprint Spectrum
Program. 
 The definition of “Permitted Investments” in Section 1.01 of the Pre-2017
Indenture as it relates to the 2023 Senior Notes is hereby amended by (i) deleting the word “and” at the end of clause (18), (ii) replacing the period at the end of clause (19) thereof with “; and” and (iii) adding
a new clause (20) immediately after clause (19), which shall read as follows: 
 (20)    any other
Investments made in connection with the Existing Sprint Spectrum Program. 
 The definition of “Permitted Investments” in
Section 1.01 of the Post-2017 Indenture as it relates to each Series of Post-2017 Notes is hereby amended by (i) deleting the word “and” at the end of clause (19), (ii) replacing the period at the end of clause (20) thereof
with “; and” and (iii) adding a new clause (21) immediately after clause (20), which shall read as follows: 

(21)    any other Investments made in connection with the Existing Sprint Spectrum Program. 

Section 4.08 of the Indenture as it relates to each Series of Subject Notes is hereby amended by (i) deleting the word
“and” at the end of clause (b)(16), (ii) replacing the period at the end of clause (b)(17) thereof with “; and” and (iii) adding a new clause (b)(18) immediately after clause (b)(17), which shall read as follows: 

(18)    encumbrances or restrictions pursuant to any Existing Sprint Spectrum Financing Document, affecting
any Existing Sprint Spectrum Subsidiary or in connection with the Existing Sprint Spectrum Program; 

  
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 Section 4.09 of the Indenture as it relates to each Series of Subject Notes is hereby
amended by adding the following sentence at the end of clause (b): 
 Notwithstanding the foregoing, the Existing Sprint
Spectrum Notes will be deemed to be outstanding pursuant to Section 4.09(b)(1) and will reduce the amount of Indebtedness otherwise permitted to be incurred thereunder. 

Section 4.17 of the Indenture as it relates to each Series of Subject Notes is hereby deleted in its entirety and replaced with the
following: 
 If (a) the Company or any of the Company’s Domestic Restricted Subsidiaries acquires or creates
another Domestic Restricted Subsidiary (and such Subsidiary is a Wholly-Owned Subsidiary and is not a Designated Tower Entity, the Reinsurance Entity, an Immaterial Subsidiary or (so long as the aggregate principal amount of Existing Sprint Spectrum
Notes does not exceed the Existing Sprint Spectrum Program Cap) an Existing Sprint Spectrum Subsidiary) after the Series Issue Date or (b) any Restricted Subsidiary of the Company guarantees any Specified Issuer Indebtedness of the Company
after the Series Issue Date or (c) Parent or any Subsidiary of Parent acquires or creates a Subsidiary that directly or indirectly owns Equity Interests of the Company, then the Company or Parent, as applicable, will cause that newly acquired
or created Domestic Restricted Subsidiary, Restricted Subsidiary or Subsidiary of Parent to become a Guarantor of the Notes of this Series and execute a supplemental indenture and, if requested by the Trustee, deliver an Opinion of Counsel
reasonably satisfactory to the Trustee within 10 Business Days after the date on which it was acquired or created or guarantees such Specified Issuer Indebtedness, as applicable, or reasonably promptly thereafter. 

Section 1.01 of the Indenture as it relates to the 2025 Senior Notes is hereby amended by adding the following definition: 

“DT Notes” means (i) the Senior Reset Notes due 2023 issued pursuant to the Fifth Supplemental Indenture, dated as of
April 28, 2013, among the Company, the guarantors party thereto and the Trustee (ii) the 4.000% Senior Notes due 2022-1 issued pursuant to the Twenty-Sixth Supplemental Indenture, dated as of
April 27, 2017, among the Company, the guarantors party thereto and the Trustee, (iii) the 5.375% Senior Notes due 2027-1 issued pursuant to the Twenty-Eighth Supplemental Indenture, dated as of
April 28, 2017, among the Company, the guarantors party thereto and the Trustee, (iv) the 4.500% Senior Notes due 2026-1 issued pursuant to the Thirty-Fifth Supplemental Indenture, dated as of
April 30, 2018, among the Company, the guarantors party thereto and the Trustee, and (v) the 4.750% Senior Notes due 2028-1 issued pursuant to the Thirty-Sixth Supplemental Indenture, dated as of
April 30, 2018, among the Company, the guarantors party thereto and the Trustee. 
 Section 2.03(b) of the Twenty-Seventh
Supplemental Indenture as it relates to the 2025 Senior Notes shall be deleted in its entirety and replaced with the following: 

(b) The principal amount of the Notes of this Series is due and payable in full on April 15, 2021 unless earlier redeemed,
at a price equal to par plus any accrued and unpaid interest. 

  
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 Section 2.03(f) of the Twenty-Seventh Supplemental Indenture as it relates to the 2025
Senior Notes shall be deleted in its entirety and replaced with the following: 
 (f) the Notes of this Series shall not be
entitled to the benefit of a sinking fund. The Company shall be required to redeem 100% of the then-outstanding Notes, at a price equal to 100% of the aggregate principal amount of the Notes, plus accrued and unpaid interest on the Notes redeemed
to, but not including, the applicable redemption date, on any date that the Company redeems or prepays any other notes or debt securities (other than the DT Notes) issued by the Company and outstanding as of April 29, 2018. 

The 2025 Senior Notes shall be amended to delete “April 15, 2025”, in each case, and replace it with “April 15, 2021”.

 The 2025 Senior Notes shall be amended to delete paragraph (6) “Mandatory Redemption” in its entirety and replace it with the
following: 
 (6) MANDATORY REDEMPTION 

The Company shall be required to redeem 100% of the then-outstanding Notes, at a price equal to 100% of the aggregate principal
amount of the Notes, plus accrued and unpaid interest on the Notes redeemed to, but not including, the applicable redemption date, on any date that the Company redeems or prepays any other notes or debt securities (other than the DT Notes) issued by
the Company and outstanding as of April 29, 2018. 
 Section 2.03(b) of the Twenty-Eighth Supplemental Indenture as it relates to
the 2027 Senior Notes shall be deleted in its entirety and replaced with the following: 
 (b) The principal amount of the
Notes of this Series is due and payable in full on April 15, 2022 unless earlier redeemed, at a price equal to par plus any accrued and unpaid interest. 

The 2027 Senior Notes shall be amended to delete “April 15, 2027”, in each case, and replace it with “April 15, 2022”.

 3. Ratification of Indenture; Supplement Part of Indenture. Except as expressly amended and supplemented hereby, the applicable
Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. Every reference in the applicable Indenture to such Indenture shall hereby be deemed to mean such
Indenture as supplemented by this Thirty-Eighth Supplemental Indenture. This Thirty-Eighth Supplemental Indenture shall form a part of the applicable Indenture for all purposes, and every Holder of Subject Notes heretofore or hereafter authenticated
and delivered shall be bound hereby. 
 4. Effectiveness. The provisions of this Thirty-Eighth Supplemental Indenture will take
effect immediately upon its execution by the Company, the Guarantors and the Trustee, and 

  
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thereupon this Thirty-Eighth Supplemental Indenture shall form a part of the applicable Indenture for all purposes; provided that, for the avoidance of doubt, the amendments provided for in the
foregoing Section 2 shall not become operative until immediately prior to (and subject in all respects to) the consummation of the T-Mobile/Sprint Transaction. 

5. Governing Law; Waiver of Jury Trial. THIS THIRTY-EIGHTH SUPPLEMENTAL INDENTURE WILL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH
THE LAWS OF THE STATE OF NEW YORK. 
 6. Waiver of Jury Trial. EACH OF THE PARTIES HERETO HEREBY IRREVOCABLY WAIVES, TO THE FULLEST
EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS THIRTY-EIGHTH SUPPLEMENTAL INDENTURE. 

7. Counterparts. The parties may sign any number of copies of this Thirty-Eighth Supplemental Indenture. Each signed copy shall be an
original, but all of them together represent the same agreement. Delivery of an executed counterpart of a signature page to this Thirty-Eighth Supplemental Indenture by facsimile, email or other electronic means shall be effective as delivery of a
manually executed counterpart of this Thirty-Eighth Supplemental Indenture. 
 8. Effect of Headings. The Section headings herein
have been inserted for the convenience of reference only, are not to be considered a part of this Thirty-Eighth Supplemental Indenture and shall in no way modify or restrict any of the terms or provisions hereof. 

9. The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this
Thirty-Eighth Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Company and each of the Guarantors. 

10. Successors. All agreements of each of the Company and the Guarantors in this Thirty-Eighth Supplemental Indenture will bind its
successors, except as otherwise provided in the Indenture. All agreements of the Trustee in this Thirty-Eighth Supplemental Indenture shall bind its successors. 

11. Severability. In case any provision in this Thirty-Eighth Supplemental Indenture is invalid, illegal or unenforceable, the
validity, legality and enforceability of the remaining provisions will not in any way be affected or impaired thereby. 
 [Remainder of page
intentionally left blank] 

  
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 IN WITNESS WHEREOF, the parties hereto have caused this Thirty-Eighth Supplemental Indenture
to be duly executed and attested, all as of the date first above written. 
  

			
	T-MOBILE USA, INC.
		
	By:	 	 /s/ J. Braxton Carter

	Name:	 	J. Braxton Carter
	Title:	 	Executive Vice President and
		 	Chief Financial Officer

  
 [Signature Page to
Thirty-Eighth Supplemental Indenture] 

 
			
	GUARANTORS:
	
	IBSV LLC
	IOWA WIRELESS SERVICES, LLC
	IOWA WIRELESS SERVICES HOLDING CORPORATION
	METROPCS CALIFORNIA, LLC
	METROPCS FLORIDA, LLC
	METROPCS GEORGIA, LLC
	METROPCS MASSACHUSETTS, LLC
	METROPCS MICHIGAN, LLC
	METROPCS NETWORKS CALIFORNIA, LLC
	METROPCS NETWORKS FLORIDA, LLC
	METROPCS NEVADA, LLC
	METROPCS NEW YORK, LLC
	METROPCS PENNSYLVANIA, LLC
	METROPCS TEXAS, LLC
	POWERTEL MEMPHIS LICENSES, INC.
	POWERTEL/MEMPHIS, INC.
	SUNCOM WIRELESS HOLDINGS, INC.
	SUNCOM WIRELESS INVESTMENT COMPANY LLC
	SUNCOM WIRELESS LICENSE COMPANY, LLC
	SUNCOM WIRELESS MANAGEMENT COMPANY, INC.
	SUNCOM WIRELESS OPERATING COMPANY, L.L.C.
	SUNCOM WIRELESS PROPERTY COMPANY, L.L.C.
	SUNCOM WIRELESS, INC.
	T-MOBILE CENTRAL LLC
	T-MOBILE FINANCIAL LLC
	T-MOBILE LEASING LLC
	T-MOBILE LICENSE LLC
	T-MOBILE NORTHEAST LLC
	T-MOBILE PCS HOLDINGS LLC
	T-MOBILE PUERTO RICO HOLDINGS LLC
	T-MOBILE PUERTO RICO LLC
	T-MOBILE RESOURCES CORPORATION
	T-MOBILE SOUTH LLC
	T-MOBILE SUBSIDIARY IV CORPORATION
	T-MOBILE US, INC.
	T-MOBILE WEST LLC
	TRITON PCS FINANCE COMPANY, INC.
	TRITON PCS HOLDINGS COMPANY L.L.C.
	VOICESTREAM PCS I IOWA LLC
		
	By:	 	 /s/ J. Braxton Carter

	Name:	 	J. Braxton Carter
	Title:	 	Authorized Person

  
 [Signature Page to
Thirty-Eighth Supplemental Indenture] 

 
			
	 DEUTSCHE BANK TRUST COMPANY AMERICAS,

as Trustee

		
	By:	 	 /s/ Jeffrey Schoenfeld

	Name:	 	Jeffrey Schoenfeld
	Title:	 	Vice President
		
	By:	 	 /s/ Debra A. Schwalb

	Name:	 	Debra A. Schwalb
	Title:	 	Vice President

  
 [Signature Page to
Thirty-Eighth Supplemental Indenture]EX-4.3

 Exhibit 4.3 

FIRST AMENDMENT TO REGISTRATION RIGHTS AGREEMENT 

THIS FIRST AMENDMENT (the “First Amendment”) TO REGISTRATION RIGHTS AGREEMENT is made and entered into as of
this 19th day of December, 2018, by and among Par Pacific Holdings, Inc., a Delaware corporation (the “Company”), and the holder of registrable securities (the “Holder”) listed on the signature pages
hereto. 
 RECITALS: 

WHEREAS, pursuant to Section 4.3 of the Registration Rights Agreement dated August 31, 2012 (the
“Registration Rights Agreement”), by and among the Company and the holders of registrable securities named therein, the Registration Rights Agreement may be amended or modified by the Company and the holders of a majority of
the registrable securities; 
 WHEREAS, the Holder holds a majority of the registrable securities; and 

WHEREAS, the Holder and the Company desire to enter into the First Amendment to amend Section 2.11 of the
Registration Rights Agreement. 
 NOW, THEREFORE, the parties hereto agree to amend the Registration Rights Agreement as
follows:     
  

	 	I.	 Amendment to the Registration Rights Agreement: 

1.    Section 2.11 of the Registration Rights Agreement is hereby amended and restated in its entirety and replaced
with the following: 
 From and after the date of this Agreement, the Company shall not (a) enter into any agreement with any Holder or
prospective holder of any securities of the Company providing for the granting to such Holder or prospective holder of registration rights that are more favorable in any material respect than or are otherwise inconsistent with the rights granted
hereunder and which does not expressly provide that the Holders in this Agreement shall be treated pari passu or with priority with respect to such Holders and prospective holders and have priority over such prospective holders of securities
of the Company in any subsequent registration statement or (b) with respect to its securities, enter into any agreement or arrangement, take any action, or permit any change to occur that violates or subordinates the rights expressly granted to
the Holders in this Agreement. Notwithstanding anything herein to the contrary, the Company further agrees that if any other registration rights agreement entered into after the date of this Agreement with respect to any of its securities contains
terms which are more favorable to, or less restrictive on, the other party thereto than the terms and conditions contained in this Agreement are (insofar as 

 
they are applicable) to the holders of Registrable Shares, then the terms and conditions of this Agreement shall immediately be deemed to have been amended without further action by the Company
or any of the holders of Registrable Shares so that such holders shall each be entitled to the benefit of any such more favorable or less restrictive terms or conditions. 
  

	 	II.	 General Provisions 

1.    In case of conflict between this First Amendment and the Registration Rights Agreement, this First Amendment shall
control. 
 2.    The Registration Rights Agreement, except as expressly amended hereby, shall remain in full force and
effect. 
 3.    The provisions of Section 4.9 of the Registration Rights Agreement captioned
“Governing Law and Venue; Waiver of Jury Trial,” are incorporated herein by reference as though such provisions were fully set forth verbatim herein and shall apply to this First Amendment mutatis mutandis. 

4.    This First Amendment may be executed in several counterparts (including by facsimile, .pdf or other electronic
transmission), each of which shall be deemed an original and all of which together constitute one and the same instrument. 
 [Signature
appears on following page] 

  
 2 

 IN WITNESS WHEREOF, the parties have executed this First Amendment to Registration Rights
Agreement as of the date first written above. 
  

			
	 COMPANY:
  

PAR PACIFIC HOLDINGS, INC.

		
	By:	 	/s/ William Monteleone
	Name:	 	 
	Title:	 	 
	
	 HOLDER:
  

ZELL CREDIT OPPORTUNITIES MASTER FUND, L.P.

		
	By:	 	/s/ Jon Wasserman
	Name:	 	Jon Wasserman
	Title:	 	Authorized Signatory

  
 [SIGNATURE
PAGE TO FIRST AMENDMENT TO REGISTRATION RIGHTS AGREEMENT]

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