Exhibit A

JOINT FILING AGREEMENT

Pursuant to and in accordance with the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder (the “Exchange Act”) the undersigned hereby agree to the joint filing on behalf of each of them of any filing required by such party under Section 13 of the Exchange Act or any rule or regulation thereunder (including any amendment, restatement, supplement, and/or exhibit thereto) with respect to securities of Vivint Smart Home, Inc., a Delaware corporation, and further agree to the filing, furnishing, and/or incorporation by reference of this Agreement as an exhibit thereto. Each of them is responsible for the timely filing of such filings and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but none of them is responsible for the completeness or accuracy of the information concerning the other persons making the filing, unless such person knows or has reason to believe that such information is inaccurate. This Agreement shall remain in full force and effect until revoked by any party hereto in a signed writing provided to each other party hereto, and then only with respect to such revoking party. This Agreement may be executed in any number of counterparts all of which taken together shall constitute one and the same instrument.

Dated: January 27, 2020

313 ACQUISITION LLC
By: Blackstone Capital Partners VI L.P., its managing member
By: Blackstone Management Associates VI L.L.C., its general partner
By: BMA VI L.L.C., its sole member
By:	/s/ John G. Finley
Name: John G. Finley
Title:   Chief Legal Officer
BCP VOYAGER HOLDINGS LP
By: Blackstone Management Associates VI L.L.C., its general partner
By: BMA VI L.L.C., its sole member
By:	/s/ John G. Finley
Name: John G. Finley
Title:   Chief Legal Officer
BLACKSTONE CAPITAL PARTNERS VI L.P.
By: Blackstone Management Associates VI L.L.C., its general partner
By: BMA VI L.L.C., its sole member
By:	/s/ John G. Finley
Name: John G. Finley
Title:   Chief Legal Officer
BLACKSTONE FAMILY INVESTMENT PARTNERSHIP VI L.P.
By: BCP VI Side-by-Side GP L.L.C., its general partner
By:	/s/ John G. Finley
Name: John G. Finley
Title:   Chief Legal Officer
BCP VI SIDE-BY-SIDE GP L.L.C.
By:	/s/ John G. Finley
Name: John G. Finley
Title:   Chief Legal Officer

BLACKSTONE MANAGEMENT ASSOCIATES VI L.L.C.
By: BMA VI L.L.C., its sole member
By:	/s/ John G. Finley
Name: John G. Finley
Title:   Chief Legal Officer
BMA VI L.L.C.
By:	/s/ John G. Finley
Name: John G. Finley
Title:   Chief Legal Officer
BLACKSTONE HOLDINGS III L.P.
By: Blackstone Holdings III GP L.P., its general partner
By: Blackstone Holdings III GP Management L.L.C., its general partner
By:	/s/ John G. Finley
Name: John G. Finley
Title:   Chief Legal Officer
BLACKSTONE HOLDINGS III GP L.P.
By: Blackstone Holdings III GP Management L.L.C., its general partner
By:	/s/ John G. Finley
Name: John G. Finley
Title:   Chief Legal Officer
BLACKSTONE HOLDINGS III GP MANAGEMENT L.L.C.
By:	/s/ John G. Finley
Name: John G. Finley
Title:   Chief Legal Officer
THE BLACKSTONE GROUP INC.
By:	/s/ John G. Finley
Name: John G. Finley
Title:   Chief Legal Officer
BLACKSTONE GROUP MANAGEMENT L.L.C.
By:	/s/ John G. Finley
Name: John G. Finley
Title:   Chief Legal Officer
/s/ Stephen A. Schwarzman
Stephen A. Schwarzman