Exhibit 4.5

        

       
        


       

      

      T-MOBILE USA, INC.

       

      and

       

      T-MOBILE US, INC.

       

      and

       

      EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO

       
        


       

      3.400% SENIOR SECURED NOTES DUE 2052

       

      TWENTY-THIRD SUPPLEMENTAL INDENTURE

       

      Dated as of December 6, 2021

       
        


       

      DEUTSCHE BANK TRUST COMPANY AMERICAS

       

      as Trustee

       
        


       

      

      to

       

      INDENTURE

       

      Dated as of April 9, 2020

       

      
        

        

        

      

      
        
          


      

      
      TABLE OF CONTENTS

      

      

      	
              ARTICLE I DEFINITIONS AND INCORPORATION BY REFERENCE

            	
              2

            
	 	 
	 	
              Section 1.01

            	
              Definitions.

            	
              2

            
	 	
              Section 1.02

            	
              Other Definitions.

            	
              2

            
	 	
              Section 1.03

            	
              Rules of Construction.

            	
              2

            
	 	 	 	 
	
              ARTICLE II THE ADDITIONAL NOTES

            	
              3

            
	 	 
	 	
              Section 2.01

            	
              Terms of Additional Notes.

            	
              3

            
	 	
              Section 2.02

            	
              Agreement to Guarantee.

            	
              3

            
	 	 	 	 
	
              ARTICLE III MISCELLANEOUS

            	
              4

              

            
	 	 
	 	
              Section 3.01

            	
              Effect of the Twenty-Third Supplemental Indenture.

            	
              3

            
	 	
              Section 3.02

            	
              Governing Law.

            	
              4

            
	 	
              Section 3.03

            	
              Waiver of Jury Trial.

            	
              4

            
	 	
              Section 3.04

            	
              No Adverse Interpretation of Other Agreements.

            	
              4

            
	 	
              Section 3.05

            	
              Successors.

            	
              4

            
	 	
              Section 3.06

            	
              Severability.

            	
              4

            
	 	
              Section 3.07

            	
              Counterparts.

            	
              5

              

            
	 	
              Section 3.08

            	
              Table of Contents, Headings, etc.

            	
              5

            
	 	
              Section 3.09

            	
              Beneficiaries of this Twenty-Third Supplemental Indenture.

            	
              5

            
	 	
              Section 3.10

            	
              No Personal Liability of Directors, Officers, Employees and Stockholders.

            	
              5

            
	 	
              Section 3.11

            	
              The Trustee.

            	
              5

            


      

      

      
        i

        
          


      

      TWENTY-THIRD SUPPLEMENTAL INDENTURE (this “Twenty-Third Supplemental Indenture”), dated as of December 6, 2021
        (the “Additional Notes Issue Date”), among T-Mobile USA, Inc., a Delaware corporation (the “Issuer”), T-Mobile, US, Inc., a
        Delaware corporation (“Parent,” as a guarantor), and the other guarantors party hereto (together with Parent, the “Guarantors”) and Deutsche Bank Trust Company
        Americas, a New York banking corporation, as Trustee.

       

      WHEREAS, the Issuer has heretofore executed and delivered an Indenture, dated as of April 9, 2020 (the “Base
          Indenture”), among the Issuer, Parent and the Trustee, providing for the issuance from time to time of one or more Series of the Issuer’s Notes;

       

      WHEREAS, the Issuer, the Guarantors and the Trustee have heretofore entered into a Nineteenth Supplemental Indenture, dated as of August 13, 2021 (the
        “Nineteenth Supplemental Indenture”) to the Base Indenture (the Base Indenture, as amended and supplemented from time to time, including pursuant to the Nineteenth Supplemental Indenture, being referred to
        herein as the “Original Indenture,” and as further amended and supplemented by this Twenty-Third Supplemental Indenture, being referred to herein as the “Indenture”)
        establishing the terms of the Issuer’s 3.400% Senior Secured Notes due 2052 (the “Notes”);

       

      WHEREAS, acting pursuant to a Company Order delivered to the Trustee in accordance with the terms of the Original Indenture, the Trustee authenticated
        and delivered Notes for original issue in an aggregate principal amount of $1,300,000,000 on August 13, 2021 (the “Existing Notes”);

       

      WHEREAS, under Section 2.03 of the Nineteenth Supplemental Indenture, the aggregate principal amount of the Notes to be issued may be increased, and
        such Series may be reopened for issuances of additional Notes, upon delivery to the Trustee of a Company Order without the consent of any Holder of Notes;

       

      WHEREAS, the Issuer has furnished the Trustee with a duly authorized and executed Company Order dated December 6, 2021, authorizing and directing the
        Trustee to issue and authenticate $1,500,000,000 in aggregate principal amount of Notes (the “Additional Notes”), constituting an additional issuance of Notes, fungible with the Existing Notes and
        consolidated with and forming a single Series with the Existing Notes; and

       

      WHEREAS, all things necessary to make this Twenty-Third Supplemental Indenture a valid, binding and enforceable agreement of the Issuer, the Guarantors
        and the Trustee and a valid supplement to the Base Indenture have been done.

       

      NOW, THEREFORE, the Issuer, 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 Additional Notes established hereby:

       

      

      
        
          


      

      
      ARTICLE I

      DEFINITIONS AND INCORPORATION BY REFERENCE

       

      Section 1.01          Definitions.

       

      (a)          All capitalized terms which are used herein and not
          otherwise defined herein are defined in the Original Indenture and are used herein with the same meanings as in the Original Indenture.  If a capitalized term is defined in both the Original Indenture and this Twenty-Third Supplemental Indenture,
          the definition in this Twenty-Third Supplemental Indenture shall apply to the Additional Notes authenticated hereby (and any Note Guarantee in respect thereof).

       

      (b)          Section 1.01 of the Base Indenture shall be amended to
          add new definitions thereto in appropriate alphabetical sequence, replace certain definitions in their entirety and to modify certain definitions, as follows:

       

      (i)          With respect to the Additional
          Notes, the definition of “Registration Rights Agreement” shall be replaced in its entirety with the following definition:

       

      “Registration Rights Agreement” means (i) the Registration Rights Agreement, dated as of the Additional Notes
        Issue Date, among the Issuer, Parent, the Subsidiary Guarantors, Barclays Capital Inc., Credit Suisse Securities (USA) LLC and Goldman Sachs & Co. LLC, for themselves and as representatives of the initial purchasers, as such agreement may be
        amended, modified or supplemented from time to time and (ii) with respect to the issuance of Notes of any Series issued after the Additional Notes Issue Date and issued in a transaction exempt from the registration requirements of the Securities
        Act, the registration rights agreement, if any, among the Issuer, any guarantors party thereto and the initial purchasers of such Series of Notes.

      

      

      Section 1.02          Other
            Definitions.

       

      	
              Term

            	
              Defined in Section

            
	
              “Additional Notes”

            	
              Recitals

            
	
              “Additional Notes Issue Date”

            	
              Recitals

            
	
              “Base Indenture”

            	
              Recitals

            
	
              “Guarantors”

            	
              Recitals

            
	
              “Indenture”

            	
              Recitals

            
	
              “Issuer”

            	
              Recitals

            
	
              “Nineteenth Supplemental Indenture”

            	
              Recitals

            
	
              “Parent”

            	
              Recitals

            
	
              “Twenty-Third Supplemental Indenture”

            	
              Recitals

            


      

      

      Section 1.03          Rules of
            Construction.

       

      Unless the context otherwise requires:

       

      (1)          a term has the meaning assigned to
          it;

       

      
        -2-

        
          


      

      (2)          an accounting term not otherwise
          defined has the meaning assigned to it in accordance with GAAP;

       

      (3)          “or” is not exclusive;

       

      (4)          words in the singular include the
          plural, and in the plural include the singular;

       

      (5)          “will” shall be interpreted to
          express a command;

       

      (6)          provisions apply to successive
          events and transactions;

       

      (7)          “including” means “including,
          without limitation”;

       

      (8)          references to sections of or rules
          under the Securities Act will be deemed to include substitute, replacement or successor sections or rules adopted by the SEC from time to time;

       

      (9)          all references, in any context, to
          any interest or other amount payable on or with respect to the Notes of any Series shall be deemed to include an Additional Interest pursuant to the Registration Rights Agreement; and

       

      (10)        the phrases “in writing” or
          “written” as used herein shall be deemed to include PDFs, e-emails and other electronic means of Transmission, unless otherwise indicated.

       

      ARTICLE II

      THE ADDITIONAL NOTES

       

      Section 2.01          Terms of Additional Notes.

       

      The Additional Notes shall have the terms set forth in Section 2.03 of the Nineteenth Supplemental Indenture except as modified by the following:

       

      (a)          The aggregate principal amount of Additional Notes
          which shall be authenticated and delivered on the Additional Notes Issue Date under the Indenture shall be $1,500,000,000;

       

      (b)          The Additional Notes issued on the Additional Notes
          Issue Date will be issued at an issue price of 99.422% of the principal amount thereof.

       

      Section 2.02          Agreement
            to Guarantee.

       

      The Guarantors hereby agree, jointly and severally, to unconditionally guarantee the Issuer’s obligations under the Additional Notes and the Indenture
        on the terms and subject to the conditions set forth in the Indenture including but not limited to ARTICLE X of the Base Indenture.

       

      

      
        -3-

        
          


      

       

      ARTICLE III

      MISCELLANEOUS

       

      Section 3.01          Effect of
            the Twenty-Third Supplemental Indenture.

       

      (a)          This Twenty-Third Supplemental Indenture is a
          supplemental indenture within the meaning of Section 2.02 of the Base Indenture, and the Original Indenture shall (notwithstanding Section 12.12 of the Base Indenture or Section 3.04 hereof) be read together with this Twenty-Third Supplemental
          Indenture and shall have the same effect over the Additional Notes, in the same manner as if the provisions of the Original Indenture and this Twenty-Third Supplemental Indenture were contained in the same instrument.

       

      (b)          In all other respects, the Original Indenture is
          confirmed by the parties hereto as supplemented by the terms of this Twenty-Third Supplemental Indenture.

       

      Section 3.02          Governing
            Law.

       

      THIS TWENTY-THIRD SUPPLEMENTAL INDENTURE AND THE ADDITIONAL NOTES WILL BE GOVERNED BY THE LAWS OF THE STATE OF NEW YORK.

       

      Section 3.03          Waiver of
            Jury Trial.

       

      EACH PARTY HERETO HEREBY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY
        LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS TWENTY-THIRD SUPPLEMENTAL INDENTURE.

       

      Section 3.04          No Adverse
            Interpretation of Other Agreements.

       

      Subject to Section 3.01, this Twenty-Third Supplemental Indenture may not be used to interpret any other indenture, loan or debt agreement of the
        Issuer, Parent or its Subsidiaries or of any other Person.  Subject to Section 3.01, any such other indenture, loan or debt agreement may not be used to interpret this Twenty-Third Supplemental Indenture.

       

      Section 3.05          Successors.

       

      All agreements of the Issuer in this Twenty-Third Supplemental Indenture and the Additional Notes will bind its successors.  All agreements of the
        Trustee in this Twenty-Third Supplemental Indenture will bind its successors.  All agreements of each Guarantor in this Twenty-Third Supplemental Indenture will bind its successors, except as otherwise provided in Section 10.04 of the Base
        Indenture.

       

      Section 3.06          Severability.

       

      In case any provision in this Twenty-Third Supplemental Indenture or in the Additional Notes is invalid, illegal or unenforceable, the validity,
        legality and enforceability of the remaining provisions will not in any way be affected or impaired thereby.

       

      
        -4-

        
          


      

      Section 3.07          Counterparts.

       

      This Twenty-Third Supplemental Indenture may be executed in any number of counterparts and by the parties hereto in separate counterparts, each of
        which when so executed will be deemed to be an original and all of which taken together will constitute one and the same agreement.  The exchange of copies of this Twenty-Third Supplemental Indenture and of signature pages by electronic (including
        PDF) transmission shall constitute effective execution and delivery of this Twenty-Third Supplemental Indenture as to the parties hereto and may be used in lieu of the original Twenty-Third Supplemental Indenture for all purposes.  Signatures of
        the parties hereto transmitted by electronic (including PDF) transmission shall be deemed to be their original signatures for all purposes.

       

      Section 3.08          Table of
            Contents, Headings, etc.

       

      The Table of Contents and headings of the Articles and Sections of this Twenty-Third Supplemental Indenture have been inserted for convenience of
        reference only, are not to be considered a part of this Twenty-Third Supplemental Indenture and will in no way modify or restrict any of the terms or provisions hereof.

       

      Section 3.09          Beneficiaries


            of this Twenty-Third Supplemental Indenture.

       

      Nothing in this Twenty-Third Supplemental Indenture or in the Additional Notes, expressed or implied, shall give to any Person, other than the parties
        hereto and their successors hereunder, and the Holders of the Additional Notes, any benefit or any legal or equitable right, remedy or claim under this Twenty-Third Supplemental Indenture.

       

      Section 3.10          No Personal
            Liability of Directors, Officers, Employees and Stockholders.

       

      No past, present or future director, officer, member, manager, partner, employee, incorporator or stockholder of the Issuer or any Guarantor, as such,
        will have any liability for any obligations of the Issuer or the Guarantors under the Additional Notes, this Twenty-Third Supplemental Indenture, the Note Guarantees in respect of the Additional Notes, or for any claim based on, in respect of, or
        by reason of, such obligations or their creation.  Each Holder of the Additional Notes by accepting an Additional Note waives and releases all such liability.  The waiver and release are part of the consideration for issuance of the Additional
        Notes.

       

      Section 3.11          The
            Trustee.

       

      The Trustee shall not be responsible or liable for the validity or sufficiency of, or the recitals in, this Twenty-Third Supplemental Indenture and all
        of the provisions contained in the Original Indenture in respect of the rights, privileges, immunities, powers and duties of the Trustee and the Agents shall be applicable in respect of the Additional Notes and of this Twenty-Third Supplemental
        Indenture as fully and with like effect as set forth in full herein.

      

      

      [Signatures on following page]

      

      

      
        -5-

        
          


      

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

       

      	 	
              T-MOBILE USA, INC.

            	 
	 	 	 
	 	
              By: 

            	/s/ Johannes Thorsteinsson	 


      	 	
              Name:

            	
              Johannes Thorsteinsson

            
	 	
              Title:

            	
              Senior Vice President, Treasury & Treasurer

            


      

      

      	 	
              T-MOBILE US, INC.

            	 
	 	 	 
	 	
              By: 

              

            	/s/ Johannes Thorsteinsson	 


      	 	
              Name:

            	
              Johannes Thorsteinsson

            
	 	
              Title:

            	
              Senior Vice President, Treasury & Treasurer

            


      

      

      [Twenty-Third Supplemental Indenture]

       

      

      
        
          


      

      ALDA WIRELESS HOLDINGS, LLC

      AMERICAN TELECASTING DEVELOPMENT, LLC

      AMERICAN TELECASTING OF ANCHORAGE, LLC

      AMERICAN TELECASTING OF COLUMBUS, LLC

      AMERICAN TELECASTING OF FORT MYERS, LLC

      AMERICAN TELECASTING OF FT. COLLINS, LLC

      AMERICAN TELECASTING OF GREEN BAY, LLC

      AMERICAN TELECASTING OF LANSING, LLC

      AMERICAN TELECASTING OF LOUISVILLE, LLC

      AMERICAN TELECASTING OF MEDFORD, LLC

      AMERICAN TELECASTING OF MONTEREY, LLC

      AMERICAN TELECASTING OF REDDING, LLC

      AMERICAN TELECASTING OF SANTA BARBARA, LLC

      AMERICAN TELECASTING OF SEATTLE, LLC

      AMERICAN TELECASTING OF SHERIDAN, LLC

      AMERICAN TELECASTING OF YUBA CITY, LLC

      APC REALTY AND EQUIPMENT COMPANY, LLC

      ASSURANCE WIRELESS OF SOUTH CAROLINA, LLC

      ASSURANCE WIRELESS USA, L.P.

      ATI SUB, LLC

      BROADCAST CABLE, LLC

      CLEAR WIRELESS LLC

      CLEARWIRE COMMUNICATIONS LLC

      CLEARWIRE HAWAII PARTNERS SPECTRUM, LLC

      CLEARWIRE IP HOLDINGS LLC

      CLEARWIRE LEGACY LLC

      CLEARWIRE SPECTRUM HOLDINGS II LLC

      CLEARWIRE SPECTRUM HOLDINGS III LLC

      CLEARWIRE SPECTRUM HOLDINGS LLC

      CLEARWIRE XOHM LLC

      FIXED WIRELESS HOLDINGS, LLC

      FRESNO MMDS ASSOCIATES, LLC

      IBSV LLC

      LAYER3 TV, LLC

      METROPCS CALIFORNIA, LLC

      METROPCS FLORIDA, LLC

      METROPCS GEORGIA, LLC, each as a Guarantor

       

      

      	 	
              By: 

            	/s/ Johannes Thorsteinsson	 


      	 	
              Name:

            	
              Johannes Thorsteinsson

            
	 	
              Title:

            	
              Senior Vice President, Treasury & Treasurer

            


      

      

      [Twenty-Third Supplemental Indenture]

      

      

      
        
          


      

      METROPCS MASSACHUSETTS, LLC

      METROPCS MICHIGAN, LLC

      METROPCS NEVADA, LLC

      METROPCS NEW YORK, LLC

      METROPCS PENNSYLVANIA, LLC

      METROPCS TEXAS, LLC

      NEXTEL COMMUNICATIONS OF THE MID-ATLANTIC, INC.

      NEXTEL OF NEW YORK, INC.

      NEXTEL RETAIL STORES, LLC

      NEXTEL SOUTH CORP.

      NEXTEL SYSTEMS, LLC

      NEXTEL WEST CORP.

      NSAC, LLC

      PCTV GOLD II, LLC

      PEOPLE’S CHOICE TV OF HOUSTON, LLC

      PRWIRELESS PR, LLC

      PUSHSPRING, LLC

      SIHI NEW ZEALAND HOLDCO, INC.

      SPEEDCHOICE OF DETROIT, LLC

      SPEEDCHOICE OF PHOENIX, LLC

      SPRINT (BAY AREA), LLC

      SPRINT CAPITAL CORPORATION

      SPRINT COMMUNICATIONS COMPANY L.P.

      SPRINT COMMUNICATIONS COMPANY OF NEW HAMPSHIRE, INC.

      SPRINT COMMUNICATIONS COMPANY OF VIRGINIA, INC.

      SPRINT COMMUNICATIONS, INC.

      SPRINT CORPORATION

      SPRINT EWIRELESS, INC.

      SPRINT INTERNATIONAL COMMUNICATIONS CORPORATION

      SPRINT INTERNATIONAL HOLDING, INC.

      SPRINT INTERNATIONAL INCORPORATED

      SPRINT INTERNATIONAL NETWORK COMPANY LLC

      SPRINT PCS ASSETS, L.L.C.

      SPRINT SOLUTIONS, INC.

      SPRINT SPECTRUM REALTY COMPANY, LLC

      SPRINT/UNITED MANAGEMENT COMPANY, each as a Guarantor

       

      

      	 	
              By: 

            	/s/ Johannes Thorsteinsson	 


      	 	
              Name:

            	
              Johannes Thorsteinsson

            
	 	
              Title:

            	
              Senior Vice President, Treasury & Treasurer

            


      

      

      [Twenty-Third Supplemental Indenture]

      
        
          


      

      TDI ACQUISITION SUB, LLC

      T-MOBILE INNOVATIONS LLC

      T-MOBILE LICENSE LLC

      T-MOBILE NORTHEAST LLC

      T-MOBILE PUERTO RICO HOLDINGS LLC

      T-MOBILE PUERTO RICO LLC

      T-MOBILE RESOURCES LLC

      T-MOBILE SOUTH LLC

      T-MOBILE WEST LLC

      TMUS INTERNATIONAL LLC

      TRANSWORLD TELECOM II, LLC

      TVN VENTURES LLC

      USST OF TEXAS, INC.

      UTELCOM LLC

      VMU GP, LLC

      WBS OF AMERICA, LLC

      WBS OF SACRAMENTO, LLC

      WBSY LICENSING, LLC

      WCOF, LLC

      WIRELINE LEASING CO., INC., each as a Guarantor

       

      

      	 	
              By: 

            	/s/ Johannes Thorsteinsson	 


      	 	
              Name:

            	
              Johannes Thorsteinsson

            
	 	
              Title:

            	
              Senior Vice President, Treasury & Treasurer

            


      

      

      SPRINTCOM, INC.

      SPRINT SPECTRUM LLC

      T-MOBILE FINANCIAL LLC

      T-MOBILE LEASING LLC, each as a Guarantor

      

      

      	 	
              By: 

            	/s/ Johannes Thorsteinsson	 


      	 	
              Name:

            	
              Johannes Thorsteinsson

            
	 	
              Title:

            	
              Assistant Treasurer

            


      

      

      T-MOBILE CENTRAL LLC, as a Guarantor

      

      

      	 	
              By: 

            	/s/ Johannes Thorsteinsson	 


      	 	
              Name:

            	
              Johannes Thorsteinsson

            
	 	
              Title:

            	
              Vice President & Treasurer

            


      

      

      [Twenty-Third Supplemental Indenture]

      

      

      
        
          


      

      	 	
              DEUTSCHE BANK TRUST COMPANY AMERICAS, as Trustee

            
	 	 
	 	 	
              By:

            	
              
                /s/ Jeffrey Schoenfeld

              

            	 
	 	 	
              Name:

            	
              Jeffrey Schoenfeld

            
	 	 	
              Title:

            	
              Vice President

            
	 	 	 	 
	 	 	
              By:

            	
              
                /s/ Luke Russell

              

            	 
	 	 	
              Name:

            	
              Luke Russell

            
	 	 	
              Title:

            	
              Vice President

            


      

      

      
        [Twenty-Third Supplemental Indenture]