Exhibit 4.29

FOIA CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO CERTAIN INFORMATION IN THIS AGREEMENT. THIS INFORMATION HAS BEEN REDACTED AND DENOTED BY ASTERISKS [***].



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TWENTIETH AMENDMENT TO

AGREEMENT 319-I

THIS TWENTIETH AMENDMENT TO AGREEMENT NUMBER 319-I IS
ENTERED INTO THIS 1STDAY OF MARCH, 2011 (THE
EXECUTION DATE), BY AND BETWEEN HUGHES NETWORK SYSTEMS, LLC, A LIMITED LIABILITY COMPANY ORGANIZED AND EXISTING UNDER THE LAWS OF THE STATE OF DELAWARE WHICH SHALL HEREINAFTER BE REFERED AS THE CLIENT, SUCCESSOR
IN INTEREST TO HUGHES NETWORK SYSTEMS, A DIVISION OF HUGHES ELECTRONICS CORPORATION, AND AS THE OTHER PARTY SATELITES MEXICANOS, S.A. DE C.V., WHICH SHALL HEREINAFTER BE REFERED AS SATMEX, A CORPORATION
ORGANIZED AND EXISTING UNDER THE LAWS OF MEXICO (TOGETHER REFERRED AS THE PARTIES) PURSUANT TO THE FOLLOWING:

W
I T N E S S E T H

WHEREAS, on January 20, 2000, SATMEX and HUGHES ELECTRONICS CORPORATION, through theCLIENT, executed the agreement number 319-I, hereinafter the Agreement;

WHEREAS, on May 16, 2000, SATMEX
and HUGHES ELECTRONICS CORPORATION, through theCLIENTexecuted a First Amendment to the Agreement, in order to substitute transponder [***] for [***] and revise Exhibit C, Initial Loading Plan;

WHEREAS, on January 1, 2001, SATMEX and HUGHES ELECTRONICS CORPORATION, through theCLIENTexecuted a Second
Amendment to the Agreement, in which HUGHESsobligation to take the [***] transponders changed from [***] to [***] and its use term was reduced from [***] months to [***];

WHEREAS, on March 1, 2001, SATMEX and HUGHES ELECTRONICS CORPORATION, through theCLIENTexecuted a Third Amendment to the Agreement, in which HUGHESsobligation to take the [***] transponders changed from [***] to [***];

WHEREAS, on May 20, 2001, SATMEX and HUGHES
ELECTRONICS CORPORATION, through the CLIENTexecuted a Fourth Amendment to the Agreement, in which the Parties agreed to substitute transponder [***] for [***];

WHEREAS, on January 1, 2002, SATMEX and HUGHES ELECTRONICS CORPORATION, through theCLIENTexecuted a Fifth Amendment to the Agreement, in which the Parties
increased the [***] additional transponders;

WHEREAS, on February 3, 2003, SATMEXand HUGHES ELECTRONICS CORPORATIONexecuted a Sixth Amendment to the Agreement in which the Parties agreed to [***];

WHEREAS, on March 24, 2003,
SATMEXand HUGHES ELECTRONICS CORPORATIONthrough the CLIENTexecuted a Seventh Amendment to the Agreement in which, among others, the CLIENT increased [***];

WHEREAS, on May 1, 2003, SATMEXand HUGHES ELECTRONICS CORPORATIONthrough the CLIENTexecuted an Eighth
Amendment to the Agreement in which, among others, the CLIENT exercised the [***] increase option under the Second clause of the Seventh Amendment;

WHEREAS, on September 7, 2004, SATMEXand HUGHES ELECTRONICS CORPORATIONthrough the CLIENT executed a Ninth Amendment to the Agreement in which, among others,
theCLIENT increase [***] in Satmex 5 satellite, transponder [***];

WHEREAS, on June 14, 2005, SATMEX and Loral
Skynet (Loral Skynet) a division of Loral Spacecom Corp. entered into an Agreement for the end of life lease of the [***] transponder on Satmex 5, hereinafter the [***];



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WHEREAS, on September 7, 2005, SATMEX entered into a companys reorganization
under Mexican reorganization law called Concurso Mercantil according to sentence dictated by Judge Second of District in Civil Matter, in the Federal District of Mexico;

WHEREAS, on December 1, 2005, SATMEXand HUGHES ELECTRONICS CORPORATIONthrough theCLIENT executed a Tenth Amendment to the Agreement in which, among others,
theCLIENT[***], to result on a total capacity of [***], applying this capacity of [***] to CLIENTS Bottom of Social Cover Program (FONCOS);

WHEREAS, on January 20, 2006, SATMEXand HUGHES ELECTRONICS CORPORATIONthrough theCLIENT executed an Eleventh Amendment to the Agreement in which, among
others, theCLIENT restructured [***] on Satmex 5 satellite and extended the term from [***] through [***];

WHEREAS, on
February 1, 2006, SATMEXand HUGHES ELECTRONICS CORPORATIONthrough theCLIENT executed a Twelfth Amendment to the Agreement in which, among others, the Parties agreed to [***] the term of the contracted
capacity in Satmex 5 satellite, under certain [***] commitment terms; and

WHEREAS, on September 15, 2006, SATMEXand
HUGHES ELECTRONICS CORPORATIONthrough theCLIENT executed a Thirteenth Amendment to the Agreement in which, among others, the Parties agreed to[***] the space segment capacity on Satmex 6 satellite.

WHEREAS, on August 1st,2008, SATMEXand HUGHES ELECTRONICS CORPORATIONthrough theCLIENT executed a Fourteenth
Amendment to the Agreement in which, among others, the Parties agreed to [***].

WHEREAS, on
February 1st,2009, SATMEXand HUGHES
ELECTRONICS CORPORATIONthrough theCLIENT executed a Fifteenth Amendment to the Agreement in which, the Parties agreed to [***]; to result a [***].

WHEREAS, on July 1st,2009, SATMEXand HUGHES ELECTRONICS CORPORATIONthrough theCLIENT executed a Sixteenth Amendment to the Agreement in which, the Parties agreed to [***] in Satellite
Satmex 5, [***] in order to result a [***].

WHEREAS, on October 1st,2009, SATMEXand HUGHES ELECTRONICS CORPORATIONthrough theCLIENT executed a Seventeenth Amendment to the Agreement in which, the Parties agreed to [***] on Satmex 5 and Satmex 6 satellites.

WHEREAS, on July 1st,2010, SATMEXand HUGHES ELECTRONICS CORPORATIONthrough theCLIENT executed an Eighteenth Amendment to the Agreement in which, the Parties agreed to [***] of SATMEX 6
satellite starting on [***].

WHEREAS, on August 1st,2010, SATMEXand HUGHES ELECTRONICS CORPORATIONthrough theCLIENT executed an Nineteenth
Amendment to the Agreement in which, the Parties agreed to [***] in Satmex 5 satellite, transponders [***] and in Satmex 6, transponders [***], in order to result a [***].

NOW THEREFORE, in consideration of the foregoing and mutual covenants contained in this Nineteenth Amendment, the Parties agree as follows:

A G R E E M E N T

FIRST.The CLIENTand SATMEX agree to [***] the satellite capacity in Satmex 6 satellite, transponders [***] in order to result a
[***].



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Therefore, the transponders related to the [***] are as follows:



| | a) | The [***] increases as follows:
| | -- | -------------------------------



|          |  |       |       |        |       |       |                          |              |  |                         
|--------- |  | ----- | ----- | ------ | ----- | ----- | ------------------------ | ------------ |  | ------------------------
|Satellite |  | Band  |       | Region |       | Txdrs |                          | BandwidthMHz |  | Period                  
|          |  |       |       |        |      
|Satmex 5  |  | [***] |       | [***]  |       | [***] |                          | [***]        |  | From [***] through [***]
|          |  |       |       |        |      
|Satmex 6  |  | [***] |       | [***]  |       | [***] |                          | [***]        |  | From [***] through [***]
|          |  |       | [***] |        | [***] |       | From [***] through [***]
|          |  |       | [***] |        | [***] |       | From [***] through [***]
|          |  |       | [***] |        | [***] |       | From [***] through [***]



| | b) | [***] for Satmex 5 satellite:
| | -- | -----------------------------



|          |  |       |  |       |  |                                       |  |                        
|--------- |  | ----- |  | ----- |  | ------------------------------------- |  | -----------------------
|Satellite |  | Band  |  | Txdrs |  | BandwidthMHz                          |  | Period                 
|          |  |       |  |      
|Satmex 5  |  | [***] |  | [***] |  | [***]                                 |  | From [***], until [***]
|          |  | [***] |  | [***] |  | It was effective from [***], to [***]
|          |  | [***] |  | [***] |  | From [***] until [***]               
|          |  | [***] |  | [***] |  | It was effective from [***], to [***]



| | c) | [***] for Satmex 6 satellite:
| | -- | -----------------------------



|          |       |       |       |       |                                        |                        |  |       
|--------- | ----- | ----- | ----- | ----- | -------------------------------------- | ---------------------- |  | ------
|Satellite |       | Band  |       | Txdrs |                                        | BandwidthMHz           |  | Period
|          |       |       |      
|Satmex 6  |       | [***] |       | [***] |                                        | From [***] until [***]
|          | [***] |       | [***] |       | It was effective until [***]          
|          | [***] |       | [***] |       | It was effective from [***]           
|          | [***] |       | [***] |       | It was effective from [***], to [***].
|          | [***] |       | [***] |       | From [***] until [***]                



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FOIA CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO CERTAIN INFORMATION
IN THIS AGREEMENT. THIS INFORMATION HAS BEEN REDACTED AND DENOTED BY ASTERISKS [***].



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From [***], all the SATMEX 5 transponders currently on a [***] will be part of the [***].

Note: SATMEX will not unreasonably refuse CLIENTs request to change the assigned fixed transponder to another fixed transponder from
time to time. The intent of the Parties pursuant this Clause is that CLIENT is committing to a full [***] month term for [***] transponders, but the actual assigned transponders may [***] during the term hereof.

SECOND.Both Parties agree to modify in its entirety the Third Clause of the Seventeenth Amendment, in order to set forth the current price for
the capacity, which from the Execution Date of this Twentieth Amendment will be in accordance with the following table:



|               |  |       |  |                     |       |  |           |   |       | 
|-------------- |  | ----- |  | ------------------- | ----- |  | --------- | - | ----- | 
|[***]          | 
|Satellite      |  | MHz   |  | Price per 
MHz(USD) |       |  | USD/Month |  
|Satmex 5       |  | [***] |  | $                   | [***] |  |           | $ | [***] | 
|Satmex 6       |  | [***] |  | $                   | [***] |  |           | $ | [***] | 
|Satmex 6 [***] |  | [***] |  | $                   | [***] |  |           | $ | [***] | 



|               |  |       |  |                     |       |  |           |   |       | 
|-------------- |  | ----- |  | ------------------- | ----- |  | --------- | - | ----- | 
|[***]          | 
|Satellite      |  | MHz   |  | Price per 
MHz(USD) |       |  | USD/Month |  
|Satmex 5       |  | [***] |  | $                   | [***] |  |           | $ | [***] | 
|Satmex 6       |  | [***] |  | $                   | [***] |  |           | $ | [***] | 
|               |  |       | 
|TOTAL CAPACITY |  | [***] |  |                     |      |  |           | $ | [***] | 

THIRD.The term of this Twentieth Amendment shall commence from the Execution Date and shall terminate in
accordance with the terms and conditions set forth in the Seventeenth Amendment.

FOURTH.All notices to be provided under the
Amendments and/or the Agreement shall be in accordance with the terms and conditions set forth in the Seventeenth Amendment.

FIFTH.This Amendment, the underlying commercial relationship between the Parties, and all collateral matters relating thereto, shall be governed by, and construed in accordance with Section 33 of the Agreement.

SIXTH.Except as specifically amended hereby, the terms and conditions of the Agreement and its past Amendments, shall remain in full force and
effect in accordance with its terms.

This Twentieth Amendment is signed in counterparts, one copy remaining in possession of each Party, as
of the Execution Date first written above.



|                                     |  |  |  |                                            
|------------------------------------ |  |  |  | -------------------------------------------
|FOR THECLIENT HUGHES NETWORK SYSTEMS |  |  |  | FORSATMEX SATÉLITES MEXICANOS, S.A. DE C.V.
|                                     |  | 
|/s/    Philip K.
OBrien             |  |  |  | /s/    Patricio E.
Northland               
|PHILIP K. OBRIEN VICE PRESIDENT     |  |  |  | PATRICIO E. NORTHLAND GENERAL DIRECTOR     



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FOIA CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO CERTAIN INFORMATION
IN THIS AGREEMENT. THIS INFORMATION HAS BEEN REDACTED AND DENOTED BY ASTERISKS [***].



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SIGNATURE PAGE OF THE TWENTIETH AMENDMENT TO AGREEMENT NUMBER 319-I EXECUTED BY AND BETWEEN HUGHES
NETWORK SYSTEMS AND SATELITES MEXICANOS, S.A. DE C.V.



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