Exhibit 4.3

           

          

          
            


           

          

          T-MOBILE USA, INC.

           

          and

           

          T-MOBILE US, INC.

           

          and

           

          EACH OF THE SUBSIDIARY GUARANTORS FROM TIME TO TIME PARTY HERETO

           
            


           

          

          2.400% SENIOR SECURED NOTES DUE 2029

           

          TWENTY-FIRST 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

            	
              1

              

            
	 	 
	 	
              Section 1.01

            	
              Definitions.

            	
              1

              

            
	 	
              Section 1.02

            	
              Other Definitions.

            	
              3

              

            
	 	
              Section 1.03

            	
              Rules of Construction.

            	
              3

            
	 	 	 	 
	
              ARTICLE II THE NOTES

            	
              4

            
	 	 
	 	
              Section 2.01

            	
              Creation of the Notes; Designations.

            	
              4

            
	 	
              Section 2.02

            	
              Forms Generally.

            	
              4

            
	 	
              Section 2.03

            	
              Title and Terms of Notes.

            	
              5

            
	 	
              Section 2.04

            	
              Agreement to Guarantee.

            	
              6

            
	 	 	 	 
	
              ARTICLE III REDEMPTION AND PREPAYMENT

            	
              6

            
	 	 
	 	
              Section 3.01

            	
              Optional Redemption.

            	
              6

            
	 	 	 	 
	
              ARTICLE IV NOTE GUARANTEES

            	
              6

            
	 	 
	
              ARTICLE V COLLATERAL

            	
              6

            
	 	 
	
              ARTICLE VI MISCELLANEOUS

            	
              6

            
	 	 
	 	
              Section 6.01

            	
              Effect of the Twenty-First Supplemental Indenture.

            	
              6

            
	 	
              Section 6.02

            	
              Governing Law.

            	
              7

            
	 	
              Section 6.03

            	
              Waiver of Jury Trial.

            	
              7

            
	 	
              Section 6.04

            	
              No Adverse Interpretation of Other Agreements.

            	
              7

            
	 	
              Section 6.05

            	
              Successors.

            	
              7

            
	 	
              Section 6.06

            	
              Severability.

            	
              7

            
	 	
              Section 6.07

            	
              Counterparts.

            	
              7

            
	 	
              Section 6.08

            	
              Table of Contents, Headings, etc.

            	
              8

            
	 	
              Section 6.09

            	
              Beneficiaries of this Twenty-First Supplemental Indenture.

            	
              8

            
	 	
              Section 6.10

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

            	
              8

            
	 	
              Section 6.11

            	
              The Trustee.

            	
              8

            
	 	 	 	 
	
              EXHIBITS

            	 
	 	 	 	 


      	
              Exhibit A

            	
              Form of Initial Note

            


      

      

      
        i

        
          


      

      TWENTY-FIRST SUPPLEMENTAL INDENTURE (this “Twenty-First Supplemental Indenture”), dated as of December 6, 2021
        (the “Series 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, Section 2.01 of the Base Indenture permits the creation of the Notes of any Series with the terms and in the form permitted in Sections 2.02
        of the Base Indenture to be established in a supplemental indenture to the Base Indenture;

       

      WHEREAS, the Issuer has requested the Trustee to join with it and the Guarantors in the execution of this Twenty-First Supplemental Indenture in order
        to supplement the Base Indenture by, among other things, establishing the forms and certain terms of a Series of Notes to be known as the Issuer’s “2.400% Senior Secured Notes due 2029” and adding certain provisions thereto for the benefit of the
        Holders of the Notes of such Series;

       

      WHEREAS, the Issuer has furnished the Trustee with a duly authorized and executed Company Order dated December 6, 2021 authorizing the execution of
        this Twenty-First Supplemental Indenture and the issuance of the Notes established hereby; and

       

      WHEREAS, all things necessary to make this Twenty-First 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 Notes established hereby:

       

      ARTICLE I

      DEFINITIONS AND INCORPORATION BY REFERENCE

       

      Section 1.01          Definitions.

       

      (a) The Base Indenture, as amended and supplemented in respect of the Notes by this Twenty-First Supplemental Indenture is collectively referred to as
        the “Indenture.”  All capitalized terms which are used herein and not otherwise defined herein are defined in the Base Indenture and are used herein with the same meanings as in the Base Indenture.  If a
        capitalized term is defined both in the Base Indenture and this Twenty-First Supplemental Indenture, the definition in this Twenty-First Supplemental Indenture shall apply to the Notes established 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 this Series of Notes, the following definitions shall be added to Section 1.01 of the Base Indenture:

       

      “Existing T-Mobile Secured Notes” means the U.S. dollar-denominated senior secured notes issued by the Issuer
        on April 9, 2020, June 24, 2020, October 6, 2020, October 28, 2020 and August 13, 2021, as amended, restated, modified, renewed, refunded, replaced (whether upon or after termination or otherwise) or refinanced (including, in each case, by means of
        sales of debt securities) in whole or in part from time to time.

       

      (ii) With respect to this Series of 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 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 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.

       

      (iii) With respect to this Series of Notes, Article I of the Base Indenture shall be amended as follows:

       

      (1) The definition of “First Priority Debt Documents” shall be amended by replacing the words “Bridge Credit
        Documents” with the words “Bridge Credit Agreement Documents.”

       

      (2) The definition of “First Priority Notes” shall be amended by adding “(including, for the avoidance of
        doubt, the Existing T-Mobile Secured Notes)” at the end thereof.

       

      (3) Clause (8) of paragraph (b) of the definition of “Indebtedness” shall be amended to replace the word
        “Borrower” with the word “Issuer.”

       

      (4) Clause (3) of the definition of “Investment Grade Event” shall be replaced in its entirety with the
        following: “the (i) guarantees by, or direct obligation of, the Guarantors with respect to the Credit Agreement and the Existing T-Mobile Secured Notes have been released or would be released simultaneously with an Investment Grade Event Election
        and (ii) Liens securing the Obligations under the Existing T-Mobile Secured Notes and the Obligations under the Credit Agreement (including related secured interest rate agreements) have been released or would be released simultaneously with an
        Investment Grade Event Election.”

       

      
        -2-

        
          


      

      (5) The definition of “Notes Documents” shall be amended to (i) insert the words “the Existing T-Mobile
        Secured Notes, the guarantees of the Existing T-Mobile Secured Notes,” after the words “the Note Guarantees,” and (ii) insert the words “and the Existing T-Mobile Secured Notes” after the words “or documents entered into in connection with the
        Notes”.

       

      (6) Clause (7) of the definition of “Permitted Liens” shall be amended to replace the words “date of the
        consummation of the Merger” with the words “Series Issue Date”.

       

      (7) Clause (12) of the definition of “Permitted Liens” shall be amended to delete the words “(including the
        Notes and the Note Guarantees and loans outstanding under the Bridge Credit Agreement)”.

       

      (8) The definition of “Transactions” shall be amended by replacing the word “Notes” with the words “$19.0
        billion of Existing T-Mobile Secured Notes on April 9, 2020” immediately before the words “in connection with the refinancing of the Bridge Credit Agreement and the use of proceeds thereof” in clause (vi) thereof.

       

      (9) The definition of “Unsecured SPV Holdco” shall be amended by adding the words “the obligations under the
        Existing T-Mobile Secured Notes and” after the words “other than a Guarantee that is subordinated in right of payment to such SPV Holdco’s Guarantee of”.

       

      Section 1.02          Other
            Definitions.

       

      	
              Term

            	
              Defined in Section

            
	
              “Additional Notes”

            	
              2.03

            
	
              “Base Indenture”

            	
              Recitals

            
	
               “Guarantors”

            	
              Recitals

            
	
              “Indenture”

            	
              1.01

            
	
              “Issuer”

            	
              Recitals

            
	
              “Parent”

            	
              Recitals

            
	
              “Series Issue Date”

            	
              Recitals

            
	
              “Twenty-First Supplemental Indenture”

            	
              Recitals

            


      

      

      Section 1.03          Rules of
            Construction.

       

      Unless the context otherwise requires:

       

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

       

      (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;

       

      
        -3-

        
          


      

      (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 NOTES

       

      Section 2.01          Creation of
            the Notes; Designations.

       

      In accordance with Section 2.01 of the Base Indenture, the Issuer hereby creates a Series of Notes issued pursuant to the Indenture.  The Notes of this
        Series shall be known and designated as the “2.400% Senior Secured Notes due 2029” of the Issuer.  The Notes of this Series shall be entitled to the benefits of the Note Guarantee of each Guarantor signatory hereto, or that may hereafter execute a
        supplemental indenture in accordance with Section 4.09 of the Base Indenture, each such Note Guarantee to be governed by Article X of the Base Indenture (including, without limitation, the provisions for release of such Note Guarantee in respect of
        the Notes of this Series pursuant to Section 10.04 of the Base Indenture).

       

      Section 2.02          Forms
            Generally.

       

      (a)          General.  The Notes of this Series and the
          Trustee’s certificate of authentication will be substantially in the form of Exhibit A hereto.  The Notes of this Series may have notations, legends or endorsements required by law, stock exchange rule or usage.  Each Note of this Series
          will be dated the date of its authentication.  The Notes of this Series shall be in minimum denominations of $2,000 and integral multiples of $1,000.

       

      The terms and provisions contained in the Notes of this Series will constitute, and are hereby expressly made, a part of this Twenty-First Supplemental
        Indenture and the Issuer, the Guarantors and the Trustee, by their execution and delivery of this Twenty-First Supplemental Indenture, expressly agree to such terms and provisions and to be bound thereby.  However, to the extent any provision of
        any such Note conflicts with the express provisions of this Twenty-First Supplemental Indenture, the provisions of this Twenty-First Supplemental Indenture shall govern and be controlling.

       

      
        -4-

        
          


      

      (b)          Global Notes.  Notes of this Series issued in
          global form will be substantially in the form of Exhibit A hereto (including the Global Note Legend thereon and the “Schedule of Exchanges of Interests in the Global Note” attached thereto).  Notes of this Series issued in definitive form
          will be substantially in the form of Exhibit A hereto (but without the Global Note Legend thereon and without the “Schedule of Exchanges of Interests in the Global Note” attached thereto).  Each Global Note will represent such of the
          outstanding Notes of this Series as will be specified therein and each shall provide that it represents the aggregate principal amount of outstanding Notes of this Series from time to time endorsed thereon and that the aggregate principal amount
          of outstanding Notes of this Series represented thereby may from time to time be reduced or increased, as appropriate, to reflect exchanges and redemptions.  Any endorsement of a Global Note to reflect the amount of any increase or decrease in
          the aggregate principal amount of outstanding Notes of this Series represented thereby will be made by the Trustee or the Notes Custodian, at the direction of the Trustee, in accordance with instructions given by the Holder thereof.

       

      Section 2.03          Title and
            Terms of Notes.

       

      The aggregate principal amount of Notes of this Series which shall be authenticated and delivered on the Series Issue Date under the Indenture shall be
        $500,000,000; provided, however, that subject to the Issuer’s compliance with Section 4.06 of the Base Indenture, the Issuer from time to time, without giving
        notice to or seeking the consent of the Holders of Notes of this Series, may issue additional notes (the “Additional Notes”) in any amount having the same terms as the Notes of this Series in all respects,
        except for the issue date, the issue price, the initial interest payment date and rights under a related registration rights agreement, if any.  Any such Additional Notes shall be authenticated by the Trustee upon receipt of a Company Order to that
        effect, and when so authenticated, will constitute “Notes” for all purposes of the Indenture and will (together with all other Notes of this Series issued under the Indenture) constitute a single Series of
        Notes under the Indenture; provided that if such Additional Notes are not fungible with the Notes of this Series for U.S. federal income tax purposes, as applicable, as determined by the Issuer, such
        Additional Notes may have a separate CUSIP number.

       

      (a)          The Notes of this Series issued on the Series Issue
          Date will be issued at an issue price of 99.934% of the principal amount thereof.

       

      (b)          The principal amount of the Notes of this Series is
          due and payable in full as set forth in Exhibit A.

       

      (c)          The rate or rates at which the Notes shall bear
          interest, the date or dates from which such interest shall accrue, the interest payment dates on which any such interest shall be payable and the regular record date for any interest payable on any interest payment date, in each case, shall be as
          set forth in the form of the Note as set forth in Exhibit A.

       

      (d)          Other than as provided in Article III of this
          Twenty-First Supplemental Indenture, the Notes of this Series shall not be redeemable.

       

      (e)          The Notes of this Series will initially be evidenced
          by one or more Global Notes issued in the name of Cede & Co., as nominee of The Depository Trust Company.

       

      
        -5-

        
          


      

      (f)          The terms and provisions of Appendix A of the
          Base Indenture shall apply to the Notes of this Series.

       

      Section 2.04          Agreement
            to Guarantee.

       

      The Guarantors hereby agree, jointly and severally, to unconditionally guarantee the Issuer’s obligations under the 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.

       

      ARTICLE III

      REDEMPTION AND PREPAYMENT

       

      Section 3.01          Optional
            Redemption.

       

      The Notes of this Series may be redeemed, in whole, or from time to time in part, subject to the conditions and at the redemption prices set forth in
        Section 5 of the form of Note set forth in Exhibit A hereto, which are hereby incorporated by reference and made part of this Twenty-First Supplemental Indenture, together with accrued and unpaid interest, if any, thereon to, but not
        including, the redemption date, and in accordance with Article III of the Base Indenture.

       

      ARTICLE IV

      NOTE GUARANTEES

       

      With respect to this Series of Notes, clause (a)(1) of Section 10.04 in Article X of the Base Indenture shall be amended by inserting the words “and
        under the Existing T-Mobile Secured Notes” after “under the Credit Agreement”.

       

      ARTICLE V

      COLLATERAL

       

      With respect to this Series of Notes, clause (9) of Section 13.03 in Article XIII of the Base Indenture shall be replaced in its entirety with the
        following: “as to any Collateral at such time as such Collateral does not secure the Obligations under the Existing T-Mobile Secured Notes, the Obligations under the Credit Agreement (including related secured interest rate agreements) (or such
        Collateral will no longer secure the Obligations under the Existing T-Mobile Secured Notes or under the Credit Agreement (including related secured interest rate agreements), substantially concurrently with such release of Liens on such
        Collateral),”.

       

      ARTICLE VI

      MISCELLANEOUS

       

      Section 6.01          Effect of
            the Twenty-First Supplemental Indenture.

       

      (a)          This Twenty-First Supplemental Indenture is a
          supplemental indenture within the meaning of Section 2.02 of the Base Indenture, and the Base Indenture shall (notwithstanding Section 12.12 thereof or Section 6.04 hereof) be read together with this Twenty-First Supplemental Indenture and shall
          have the same effect over the Notes of this Series, in the same manner as if the provisions of the Base Indenture and this Twenty-First Supplemental Indenture were contained in the same instrument.

       

      
        -6-

        
          


      

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

       

      Section 6.02          Governing
            Law.

       

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

       

      Section 6.03          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-FIRST SUPPLEMENTAL INDENTURE.

       

      Section 6.04          No Adverse
            Interpretation of Other Agreements.

       

      Subject to Section 6.01, this Twenty-First 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 6.01, any such other indenture, loan or debt agreement may not be used to interpret this Twenty-First Supplemental Indenture.

       

      Section 6.05          Successors.

       

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

       

      Section 6.06          Severability.

       

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

       

      Section 6.07          Counterparts.

       

      This Twenty-First 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-First Supplemental Indenture and of signature pages by electronic (including
        PDF) transmission shall constitute effective execution and delivery of this Twenty-First Supplemental Indenture as to the parties hereto and may be used in lieu of the original Twenty-First 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.

       

      
        -7-

        
          


      

      Section 6.08          Table of
            Contents, Headings, etc.

       

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

       

      Section 6.09          Beneficiaries









            of this Twenty-First Supplemental Indenture.

       

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

       

      Section 6.10          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 Notes of this Series, this Twenty-First Supplemental Indenture, the Note Guarantees, or for any claim based on, in respect of, or by reason of, such obligations
        or their creation.  Each Holder of the Notes of this Series by accepting a Note of this Series waives and releases all such liability.  The waiver and release are part of the consideration for issuance of the Notes of this Series.

       

      Section 6.11          The
            Trustee.

       

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

      

      

      [Signatures on following page]

      

      

      
        -8-

        
          


      

      IN WITNESS WHEREOF, the parties hereto have caused this Twenty-First 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-First 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-First 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-First 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-First 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-First Supplemental Indenture]

           

              

        

      

      
        
          


      

      
      Exhibit A

       

      [Form of Face of Initial Note]

       

      [Insert the Global Notes Legend, if applicable pursuant to the provisions of the Indenture]

       

      
        THIS NOTE IS A GLOBAL NOTE WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF THE DEPOSITARY OR A
          NOMINEE OF THE DEPOSITARY. THIS NOTE IS EXCHANGEABLE FOR NOTES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE
          BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY, BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH A SUCCESSOR
          DEPOSITARY.

         

      

      
        [Insert Restricted Notes Legend, if applicable pursuant to the provisions of the Indenture]

         

      

      
        THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), OR THE SECURITIES LAWS OF ANY STATE
          OR OTHER JURISDICTION AND NEITHER THIS SECURITY NOR ANY INTEREST OR PARTICIPATION HEREIN MAY BE REOFFERED, SOLD, ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR OTHERWISE DISPOSED OF IN THE ABSENCE OF SUCH REGISTRATION OR UNLESS SUCH TRANSACTION IS
          EXEMPT FROM, OR NOT SUBJECT TO, SUCH REGISTRATION. THE HOLDER OF THIS SECURITY, BY ITS ACCEPTANCE HEREOF, AGREES ON ITS OWN BEHALF AND ON BEHALF OF ANY INVESTOR ACCOUNT FOR WHICH IT HAS PURCHASED SECURITIES, TO OFFER, SELL OR OTHERWISE TRANSFER
          SUCH SECURITY, PRIOR TO THE DATE (THE “RESALE RESTRICTION TERMINATION DATE”) THAT IS [IN THE CASE OF RULE 144A NOTES: ONE YEAR AFTER THE LATER OF THE ORIGINAL ISSUE DATE HEREOF, THE ORIGINAL ISSUE DATE OF THE ISSUANCE OF ANY ADDITIONAL NOTES AND
          THE LAST DATE ON WHICH THE ISSUER OR ANY AFFILIATE OF THE ISSUER WAS THE OWNER OF THIS SECURITY (OR ANY PREDECESSOR OF SUCH SECURITY),] [IN THE CASE OF REGULATION S NOTES: 40 DAYS AFTER THE LATER OF THE ORIGINAL ISSUE DATE HEREOF AND THE DATE ON
          WHICH THIS SECURITY (OR ANY PREDECESSOR OF SUCH SECURITY) WAS FIRST OFFERED TO PERSONS OTHER THAN DISTRIBUTORS (AS DEFINED IN RULE 902 OF REGULATION S) IN RELIANCE ON REGULATION S] ONLY (A)(1) TO THE ISSUER OR ANY SUBSIDIARY THEREOF, (2) PURSUANT
          TO A REGISTRATION STATEMENT THAT HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT, (3) FOR SO LONG AS THE SECURITIES ARE ELIGIBLE FOR RESALE PURSUANT TO RULE 144A UNDER THE SECURITIES ACT, TO A PERSON IT REASONABLY BELIEVES IS A “QUALIFIED
          INSTITUTIONAL BUYER” AS DEFINED IN RULE 144A PURCHASING FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS GIVEN THAT THE TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A, (4) IN AN OFFSHORE TRANSACTION
          COMPLYING WITH RULE 903 OR RULE 904 OF REGULATION S UNDER THE SECURITIES ACT, (5) TO AN INSTITUTIONAL “ACCREDITED INVESTOR” WITHIN THE MEANING OF RULE 501 OF REGULATION D UNDER THE SECURITIES ACT IN A TRANSACTION EXEMPT FROM THE REGISTRATION
          REQUIREMENTS OF THE SECURITIES ACT OR (6) PURSUANT TO ANOTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND (B) IN ACCORDANCE WITH ALL APPLICABLE SECURITIES LAWS OF THE STATES OF THE UNITED STATES AND OTHER
          JURISDICTIONS. THIS LEGEND WILL BE REMOVED UPON THE REQUEST OF THE HOLDER AFTER THE RESALE RESTRICTION TERMINATION DATE.

         

        
          
            	Exhibit A-1


          

          
            


        

        BY ITS ACQUISITION OF THIS SECURITY OR ANY INTEREST HEREIN, THE HOLDER WILL BE DEEMED TO HAVE REPRESENTED AND WARRANTED THAT EITHER (I) NO
          PORTION OF THE ASSETS USED BY SUCH HOLDER TO ACQUIRE OR HOLD THIS NOTE OR ANY INTEREST HEREIN CONSTITUTES THE ASSETS OF ANY (A) EMPLOYEE BENEFIT PLAN THAT IS SUBJECT TO TITLE I OF THE U.S. EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS
          AMENDED (“ERISA”), (B) PLAN, INDIVIDUAL RETIREMENT ACCOUNT OR OTHER ARRANGEMENT THAT IS SUBJECT TO SECTION 4975 OF THE U.S. INTERNAL REVENUE CODE OF 1986, AS AMENDED (THE “CODE”) OR PROVISIONS UNDER ANY OTHER FEDERAL, STATE, LOCAL, NON-U.S. OR
          OTHER LAWS OR REGULATIONS THAT ARE SIMILAR TO SUCH PROVISIONS OF ERISA OR THE CODE (COLLECTIVELY, “SIMILAR LAWS”), OR (C) ENTITY WHOSE UNDERLYING ASSETS ARE CONSIDERED TO INCLUDE “PLAN ASSETS” (WITHIN THE MEANING OF 29 C.F.R. SECTION 2510.3-101
          (AS MODIFIED BY SECTION 3(42) OF ERISA) AND ANY SIMILAR LAWS) OF ANY SUCH PLAN, ACCOUNT OR ARRANGEMENT DESCRIBED IN CLAUSE (A) OR (B) ABOVE (EACH OF (A), (B) AND (C), A “PLAN”), OR (II)(A) THE ACQUISITION, HOLDING AND SUBSEQUENT DISPOSITION OF
          THIS SECURITY OR ANY INTEREST HEREIN WILL NOT CONSTITUTE A NON-EXEMPT PROHIBITED TRANSACTION UNDER SECTION 406 OF ERISA OR SECTION 4975 OF THE CODE OR A SIMILAR VIOLATION UNDER ANY APPLICABLE SIMILAR LAWS AND (B) NONE OF THE ISSUER, THE
          APPLICABLE INITIAL PURCHASER(S) OF THE SECURITY NOR ANY OF THEIR AFFILIATES, IS, BY HAVING MADE ANY ORAL OR WRITTEN STATEMENT REGARDING THE SECURITY, UNDERTAKING TO PROVIDE IMPARTIAL INVESTMENT ADVICE, OR TO GIVE ADVICE IN A FIDUCIARY CAPACITY,
          IN CONNECTION WITH THE PLAN’S PURCHASE, HOLDING OR DISPOSITION OF THE SECURITY.

        

        

      

      
        [Insert Additional Restricted Notes Legend for Notes Offered in Reliance on
            Regulation S, if applicable pursuant to the provisions of the Indenture]

         

            

      

      
        BY ITS ACQUISITION HEREOF, THE HOLDER HEREOF REPRESENTS THAT IT IS NOT A U.S. PERSON NOR IS IT PURCHASING FOR THE ACCOUNT OF A U.S. PERSON AND IS
          ACQUIRING THIS SECURITY IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH REGULATION S UNDER THE SECURITIES ACT.

         

      

      
        
          	Exhibit A-2


        

        
          


      

      [Insert Definitive Notes Legend, if applicable pursuant to the provisions of the Indenture]

       

      IN CONNECTION WITH ANY TRANSFER, THE HOLDER WILL DELIVER TO THE REGISTRAR AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER INFORMATION AS SUCH TRANSFER AGENT MAY
        REASONABLY REQUIRE TO CONFIRM THAT THE TRANSFER COMPLIES WITH THE FOREGOING RESTRICTIONS.

       

      
        [Restricted Notes Legend for Definitive Notes, if applicable pursuant to the provisions of the Indenture]

        

        

      

      
        THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), OR THE SECURITIES LAWS OF ANY STATE
          OR OTHER JURISDICTION. NEITHER THIS SECURITY NOR ANY INTEREST OR PARTICIPATION HEREIN MAY BE REOFFERED, SOLD, ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR OTHERWISE DISPOSED OF IN THE ABSENCE OF SUCH REGISTRATION OR UNLESS SUCH TRANSACTION IS
          EXEMPT FROM, OR NOT SUBJECT TO, SUCH REGISTRATION.

         

      

      
        
          	Exhibit A-3


        

        
          


      

      CUSIP [          ]

      ISIN [          ]

       

      [RULE 144A] [REGULATION S] [GLOBAL] NOTE

       

      2.400% Senior Secured Notes due 2029

       

      

      
        	 	
                No.

                

              	 	 	
                $

              


      

       

      

      T-MOBILE USA, INC.

       

      promises to pay to ___________________ or registered assigns, the principal sum [set forth on the Schedule of Exchanges of Interests in the
        Global Note attached hereto]1 [__________________ DOLLARS]2 on March 15, 2029.

       

      Interest Payment Dates: March 15 and September 15.

       

      Record Dates:  March 1 and September 1.

       

      Additional provisions of this Note are set forth on the other side of this Note.

       

      

      1 Insert in Global Notes only.

      2 Insert in Definitive Notes only.

       

      

      
        
          	Exhibit A-4


        

        
          


      

      	
              Dated:

              

            	 	 


       

      

      	
              T-MOBILE USA, INC.

            	 


      

      

      	
              By:

            	 	 
	 	
              Name:

            	 
	 	
              Title:

            	 


      

      

      
        
          	Exhibit A-5


        

        
          


      

      This is one of the Notes referred to

      in the within-mentioned Indenture:

       

      DEUTSCHE BANK TRUST COMPANY AMERICAS,

      as Trustee

       

      	
              By:

            	 	 


      	 	
              Authorized Signatory

            	 


      

      

      
        
          	Exhibit A-6


        

        
          


      

      [Form of Reverse Side of Initial Note]

       

      2.400% Senior Secured Notes due 2029 (the “Notes”)

       

      Capitalized terms used herein have the meanings assigned to them in the Indenture referred to below unless otherwise indicated.

       

      (1)          INTEREST.

       

      Interest (computed on the basis of a 360-day year comprised of twelve 30-day months) shall accrue on the principal amount of this Note from and
        including December 6, 2021 until maturity at a rate per annum equal to 2.400%.

       

      The Issuer promises to pay interest and Additional Interest, if any, semi-annually in arrears on March 15 and September 15 of each year, or if any such
        day is not a Business Day, on the next succeeding Business Day (each, an “Interest Payment Date”).  Interest on the Notes will accrue from the most recent date to which interest has been paid or, if no
        interest has been paid, from the date of issuance; provided that if there is no existing Default in the payment of interest, and if this Note is authenticated between a record date referred to on the face
        hereof and the next succeeding Interest Payment Date, interest shall accrue from such next succeeding Interest Payment Date; provided further that the first Interest
        Payment Date shall be September 15, 2022.  If an Interest Payment Date or the maturity date falls on a day that is not a Business Day, the related payment of principal or interest will be made on the next succeeding Business Day as if made on the
        date the payment was due, and no interest shall accrue for the intervening period.

       

      (2)          METHOD OF PAYMENT.

       

      The Issuer will pay interest on the Notes (except defaulted interest) to the Persons who are registered Holders of Notes at the close of business on
        the March 1 or September 1 next preceding the Interest Payment Date, even if such Notes are canceled after such record date and on or before such Interest Payment Date, except as provided in Section 2.14 of the Base Indenture with respect to
        defaulted interest.  The Notes will be payable as to principal, premium, if any, and interest at the office or agency of the Issuer maintained for such purpose within the City and State of New York, or, at the option of the Issuer, payment of
        interest may be made by check mailed to the Holders at their addresses set forth in the books and records of the Registrar; provided that payment by wire transfer of immediately available funds will be
        required with respect to principal of and interest and premium, if any, on, all Global Notes and all other Notes the Holders of which will have provided wire transfer instructions to the Issuer or the Paying Agent.  Such payment will be in such
        money of the United States of America as at the time of payment is legal tender for payment of public and private debts. [The Holder of a Definitive Note is not required to surrender such Definitive Note to the Trustee in order to receive payment
        of principal at maturity.  Such Definitive Note, after payment has been made, shall be cancelled without the requirement of presentation.]3

       

      

      3 Insert in Definitive Notes only.

       

      

      
        
          	Exhibit A-7


        

        
          


      

      (3)          PAYING AGENT AND
            REGISTRAR.

       

      Initially, Deutsche Bank Trust Company Americas, the Trustee under the Indenture, will act as Paying Agent and Registrar.  The Issuer may change any
        Paying Agent or Registrar without notice to any Holder.  The Issuer or any of its Subsidiaries may act in any such capacity.

       

      (4)          INDENTURE.

       

      The Issuer issued the Notes pursuant to an Indenture dated as of April 9, 2020 (the “Base Indenture”) among
        the Issuer, the Guarantors and the Trustee, as amended and supplemented with respect to the Notes by the Twenty-First Supplemental Indenture dated as of December 6, 2021 (the “Twenty-First Supplemental Indenture”;









        the Base Indenture, as amended and supplemented with respect to the Notes by the Twenty-First Supplemental Indenture, the “Indenture”).

      

      

      The terms of the Notes include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act.  The
        Notes are subject to all such terms, and Holders are referred to the Indenture and to the Trust Indenture Act for a statement of such terms.  To the extent any provision of this Note conflicts with the express provisions of the Indenture, the
        provisions of the Indenture shall govern and be controlling.  The Notes are senior secured obligations of the Issuer.  The Indenture does not limit the aggregate principal amount of Notes that may be issued thereunder.

      

      

      The Issuer’s obligations under the Notes are unconditionally guaranteed on a senior secured basis, to the extent set forth in the Indenture and the
        Security Documents, by each of the Secured Guarantors and on a senior unsecured basis by each of the Unsecured Guarantors to the extent set forth in the Indenture.

      

      

      (5)          OPTIONAL REDEMPTION.

       

      Prior to January 15, 2029, the Notes will be redeemable, in whole or in part, at the Issuer’s option, at any time or from time to time, on at least 10
        days’ but not more than 60 days’ prior notice to the holders of the Notes, at a redemption price equal to the greater of:

       

      •         100% of the principal amount thereof;
          or

       

      •          the sum, as calculated by the Issuer,
          of the present values of the remaining scheduled payments of principal and interest on the Notes being redeemed (assuming that such Notes matured on  January 15, 2029), exclusive of interest accrued to, but not including, the redemption date,
          discounted to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at a rate equal to the sum of the applicable Treasury Rate (as defined below) plus 20
          basis points (any excess of the amount described in this bullet point over the amount described in the immediately preceding bullet point, the “Make-Whole Premium”).

       

      On or after January 15, 2029, the Notes will be redeemable, in whole or in part, at the Issuer’s option, at any time or from time to time, on at least
        10 days’ but not more than 60 days’ prior notice to the holders of the Notes, at a redemption price equal to 100% of the principal amount thereof.

       

      
        
          	Exhibit A-8


        

        
          


      

      We will also pay the accrued and unpaid interest on the principal amount being redeemed to, but not including, the redemption date.

       

      “Comparable Treasury Issue” means the United States Treasury security selected by an Independent Investment
        Bank as having a constant maturity comparable to the remaining term (“Remaining Life”) of the Notes (assuming that the Notes matured on January 15, 2029) that would be utilized, at the time of selection and
        in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Notes (assuming that the Notes matured on January 15, 2029).

       

      “Comparable Treasury Price” means, with respect to any redemption date, (1) the average of the Reference
        Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest Reference Treasury Dealer Quotations, or (2) if the Independent Investment Bank obtains fewer than four such Reference Treasury Dealer Quotations, the
        average of all such quotations.

       

      “Independent Investment Bank”
        means one of the Reference Treasury Dealers that the Issuer appoints to act as the Independent Investment Bank from time to time.

       

      “Reference Treasury Dealer” means (1) each of Barclays Capital Inc., Credit Suisse Securities (USA) LLC and Goldman Sachs & Co. LLC and their respective successors, unless any of them
          ceases to be a primary U.S. Government securities dealer in New York City (a “Primary Treasury Dealer”), in which case we will substitute another Primary Treasury Dealer and (2) any other Primary Treasury Dealer(s) the Issuer selects.

      

      

      “Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury
        Dealer and any redemption date, the average, as determined by the Independent Investment Bank, of the bid and asked prices for the applicable Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in
        writing to the Independent Investment Bank by such Reference Treasury Dealer at 5:00 p.m., New York City time, on the third business day preceding such redemption date.

      

      

      “Treasury Rate” means, with respect to any redemption date, (i) the yield, calculated as the average of the five most recent daily rates published in the statistical release(s) designated “H.15” or any
          successor publication which is published by the Board of Governors of the Federal Reserve System and which establishes yields on actively traded U.S. Treasury securities adjusted to constant maturity under the caption “Treasury Constant
          Maturities,” for the maturity corresponding to the Comparable Treasury Issue (if no maturity is within three months before or after January 15, 2029, yields for the two published maturities most closely corresponding to the Comparable Treasury Issue shall be determined and the Treasury Rate shall be interpolated or extrapolated from such yields on a straight line basis, rounding to
            the nearest month); or (ii) if the release referred to above (or any successor release) is not published during the week preceding the calculation date or does not contain the yields referred to above, the rate per annum equal to the
            semi-annual equivalent yield to maturity of the Comparable Treasury Issue, calculated using a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such redemption
            date. The Treasury Rate will be calculated at 5:00 p.m. (New York City time) on the third business day preceding such redemption date. As used in the immediately preceding sentence and in the definition of “Reference Treasury Dealer Quotations”
            above, the term “business day” means any day that is not a Saturday, Sunday or other day on which commercial banks in New York City are authorized or obligated by law or executive order to close.

      

      

      
        
          	Exhibit A-9


        

        
          


      

      The Trustee shall have no responsibility for calculating the redemption price for the Notes.

      

      

      Unless the Issuer defaults in the payment of the redemption price, interest will cease to accrue on the Notes or portions thereof
        called for redemption on the applicable redemption date. At or before 10:00 a.m. (New York time) on the redemption date, the Issuer will deposit with the Trustee or a paying agent money sufficient to pay the redemption price of and accrued interest
        on the Notes to be redeemed on such date. If less than all of the Notes are to be redeemed, the Notes to be redeemed shall be selected in accordance with the procedures of DTC.

      

      

      For the avoidance of doubt, the requirement to pay any Make-Whole Premium shall not arise in connection with any recovery of
        amounts due as a result of any breach of any covenant contained in the Indenture or the applicable Notes except where the transaction resulting in such breach was consummated with the intent to breach such covenant.

      

      

      (6)          MANDATORY REDEMPTION.

       

      The Issuer is not required to make mandatory redemption or sinking fund payments with respect to the Notes.

       

      
        (7)          NOTICE OF REDEMPTION.

         

        Notice of redemption will be sent at least 10 days but not more than 60 days before the redemption date to each Holder whose
          Notes are to be redeemed, except that redemption notices may be sent or mailed more than 60 days prior to a redemption date if the notice is issued in connection with a defeasance of the Notes or a satisfaction and discharge of the Indenture.
          Notes in denominations larger than $2,000 may be redeemed in part but only in whole multiples of $1,000, unless all of the Notes held by a Holder are to be redeemed. In connection with any redemption of Notes, any such notice of redemption may,
          at the Issuer’s discretion, state that such redemption is subject to one or more conditions precedent, including, but not limited to, completion of an equity offering, other offering, issuance of Indebtedness or other corporate transaction or
          event. In addition, if such notice of redemption is subject to satisfaction of one or more conditions precedent, such notice may state that, in the Issuer’s discretion, the redemption date may be delayed until such time as any or all such
          conditions shall be satisfied (or waived by the Issuer in its sole discretion), or such redemption may not occur and such notice may be rescinded in the event that any or all such conditions shall not have been satisfied (or waived by the Issuer
          in its sole discretion) by the redemption date (whether the original redemption date or the redemption date so delayed).

         

      

      
        
          
            	Exhibit A-10


          

          
            


        

        
        (8)          REPURCHASE AT THE OPTION OF HOLDER.

      

       

      If there is a Change of Control Triggering Event, the Issuer will be required to make a Change of Control Offer to each Holder to repurchase all or any
        part (equal to $2,000 or an integral multiple of $1,000 in excess thereof) of such Holder’s Notes at a purchase price in cash equal to 101% of the aggregate principal amount thereof plus accrued and unpaid interest, if any, on the Notes repurchased
        to, but not including, the date of purchase, subject to the rights of Holders on the relevant record date to receive interest due on the relevant Interest Payment Date for periods prior to such repurchase date pursuant to Section 4.08 of the Base
        Indenture. Within 30 days following any Change of Control Triggering Event, the Issuer will send a notice to each Holder and the Trustee describing the transaction or transactions and identifying the Rating Event that together constitute the Change
        of Control Triggering Event, offering to repurchase Notes on the Change of Control Payment Date specified in the notice, which date will be no earlier than 10 days and no later than 60 days from the date such notice is sent and setting forth the
        procedures governing the Change of Control Offer as required by the Indenture.

       

      (9)          REGISTRATION RIGHTS. 

       

      The Holder of this Note is entitled to the benefits of a Registration Rights Agreement, including with respect to Additional
        Interest, pursuant to which, subject to the terms and conditions thereof, the Issuer and the Guarantors are obligated to consummate the Registered Exchange Offer, whereby the Exchange Notes, having terms identical in all material respects to the
        Notes (except that the Exchange Note will not contain terms with respect to transfer restrictions or Additional Interest) will be offered in exchange for surrender of the Notes.

       

      (10)        DENOMINATIONS,
            TRANSFER, EXCHANGE.

       

      The Notes are in registered form without coupons in minimum denominations of $2,000 and integral multiples of $1,000. The transfer of Notes may be
        registered and Notes may be exchanged as provided in the Indenture. The Registrar and the Trustee may require a Holder, among other things, to furnish appropriate endorsements and transfer documents and the Issuer may require a Holder to pay any
        taxes and fees required by law or permitted by the Indenture. The Issuer need not exchange or register the transfer or exchange of any Note or portion of a Note selected for redemption, except for the unredeemed portion of any Note being redeemed
        in part. Also, the Issuer need not exchange or register the transfer of any Notes (i) for a period beginning at the opening of business 15 days immediately preceding the sending of notice of redemption of Notes selected for redemption and ending at
        the close of business on the day such notice is sent or (ii) during the period between a record date and the corresponding Interest Payment Date.

       

      (11)        PERSONS DEEMED
            OWNERS.  The registered Holder of a Note may be treated as its owner for all purposes.

       

      (12)        AMENDMENT,
            SUPPLEMENT AND WAIVER.  The Indenture, the Intercreditor Agreement, the Security Documents, the Notes and the Note Guarantees may be amended, supplemented or waived as provided in Article IX of the Base Indenture and in the Intercreditor
          Agreement and the Security Documents where applicable.

       

      
        
          	Exhibit A-11


        

        
          


      

      (13)        DEFAULTS AND
            REMEDIES.  If an Event of Default occurs (other than an Event of Default relating to certain events of bankruptcy, insolvency or reorganization of the Issuer, any of its Significant Subsidiaries or any group of Subsidiaries that, taken
          together, would constitute a Significant Subsidiary) and is continuing, the Trustee or the Holders of at least 30% in principal amount of the outstanding Notes, in each case, by notice to the Issuer, may declare the principal of, premium, if any,
          and accrued but unpaid interest, if any, on all the Notes to be due and payable; provided that no such declaration may be made with respect to or as a result of any action taken, and reported publicly or
          to holders of Notes, more than two years prior to such declaration. If an Event of Default relating to certain events of bankruptcy, insolvency or reorganization of the Issuer, any of its Significant Subsidiary or any group of Subsidiaries that,
          taken together, would constitute a Significant Subsidiary occurs, the principal of, premium, if any, and interest on all the Notes shall become immediately due and payable without any declaration or other act on the part of the Trustee or any
          Holders. Under certain circumstances, the Holders of a majority in principal amount of the outstanding Notes may rescind any such acceleration with respect to the Notes and its consequences. The requirement to pay any Make-Whole Premium shall not
          arise in connection with any recovery of amounts due as a result of any breach of any covenant contained in the Indenture, this Supplemental Indenture or the applicable Notes except where the transaction resulting in such breach was consummated
          with the intent to breach such covenant.

       

      (14)        TRUSTEE DEALINGS
            WITH ISSUER.  The Trustee, in its individual or any other capacity, may become the owner or pledgee of Notes and may otherwise deal with the Issuer or any Affiliate of the Issuer with the same rights it would have if it were not Trustee.

       

      (15)        NO RECOURSE AGAINST
            OTHERS.  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 Notes, the Indenture, the Intercreditor Agreement, the Security Documents, the Note Guarantees or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder by accepting a Note waives and
          releases all such liability. The waiver and release are part of the consideration for the issuance of the Notes.

       

      (16)        AUTHENTICATION. 










          This Note will not be valid until authenticated by the manual, facsimile or electronic (including PDF) signature of the Trustee or an authenticating agent.

       

      (17)        ABBREVIATIONS. Customary abbreviations may be used in the name of a Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT
        (= tenants by the entireties), JT TEN (= joint tenants with right of survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts to Minors Act).

       

      (18)        CUSIP NUMBERS.
          Pursuant to a recommendation promulgated by the Committee on Uniform Security Identification Procedures, the Issuer has caused CUSIP numbers to be printed on the Notes and the Trustee may use CUSIP numbers in notices of redemption as a
          convenience to Holders. No representation is made as to the accuracy of such numbers either as printed on the Notes or as contained in any notice of redemption, and reliance may be placed only on the other identification numbers placed thereon.
          No redemption will be affected by any defect in or omission of such numbers.

       

      
        
          	Exhibit A-12


        

        
          


      

      (19)        GOVERNING LAW. 









          THIS NOTE WILL BE GOVERNED BY THE LAWS OF THE STATE OF NEW YORK.

       

      The Issuer will furnish to any Holder upon written request and without charge a copy of the Indenture.  Requests may be made to:

       

      T-Mobile USA, Inc.

      12920 SE 38th Street

      Bellevue, Washington 98006

      Attention: General Counsel

      Fax: (425) 383-7040

      

      

      
        
          	Exhibit A-13


        

        
          


      

      ASSIGNMENT FORM

       

      To assign this Note, fill in the form below:

       

      
        	
                 

              	(I) or (we) assign and transfer this Note to: 

                	

              


         

      (Insert assignee’s legal name)

       

      

      
        


      (Insert assignee’s soc. sec. or tax I.D. no.)

      
        
          

           

          

          
            

             

            

          

          

           

          

          


      

      (Print or type assignee’s name, address and zip code)

       

      	 	  and irrevocably appoint	 	 to transfer this Note on the books of the Issuer.  The agent may substitute another to act for him.


       

      

    

    
      
        	 	Date:

                	 	 


      

      

      

      
        	
                 

              	Your Signature:   

                	
                 

              	
                 

              


      

      

      

      (Sign exactly as your name appears on the face of this Note)

       

      

      
        	
                 

              	Signature Guarantee*: 

                	
                 

              	
                 

              


        

      

      * Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor acceptable to the Trustee).

       

      
        
          	Exhibit A-14


        

        
          


      

      OPTION OF HOLDER TO ELECT PURCHASE

       

      If you want to elect to have this Note purchased by the Issuer pursuant to Section 4.08 of the Base Indenture, check the box below:

       

      ☐  Section 4.08

       

      If you want to elect to have only part of the Note purchased by the Issuer pursuant to Section 4.08 of the Indenture, state the amount you elect to
        have purchased:

       

      $

       

      
        	
                 

              	Date:

                	

              	
                 

              


      

       

      

      
        	
                 

              	Your Signature:

                	

              	
                 

              


      

      (Sign exactly as your name appears on the face of this Note)

       

      

      
        	
                 

              	Tax Identification No.:

                	

              	
                 

              


      

       

      

      
        	
                 

              	Signature Guarantee*: 

                	

              	
                 

              


      

      

      * Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor acceptable to the Trustee).

       

      
        
          	Exhibit A-15


        

        
          


      

      SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL NOTE*

       

      The initial outstanding principal amount of this Global Note is $[_________].

       

      The following exchanges of a part of this Global Note for an interest in another Global Note or for a Definitive Note, or exchanges of a part of
        another Global Note or Definitive Note for an interest in this Global Note, have been made:

       

      	 	
              
                Date of

                Exchange

              

            	 	
              
                Amount of

                decrease in

                Principal

                Amount of this

                Global Note

              

            	 	
              
                Amount of

                increase in

                Principal

                Amount of this

                Global Note

              

            	 	
              
                Principal

                Amount of this

                Global Note

                following such

                decrease

                (or increase)

              

            	 	
              
                Signature of

                authorized

                officer of

                Trustee or

                Notes Custodian

              

            	 
	 	 	 	 	 	 	 	 	 	 	 
	 	 	 	 	 	 	 	 	 	 	 


      

      

      	*	
              This schedule should be included only if the Note is issued in global form.