Exhibit 10.1

AMENDMENT TO SECURED PROMISSORY NOTE

(William W. and Dieva L. Smith)

This AMENDMENT TO SECURED PROMISSORY NOTE (this “Amendment”) is made as of
March 25, 2017, by and between Smith Micro Software, Inc., a Delaware
corporation (the “Company”), and William W. Smith, Jr. and Dieva L. Smith,
JT/WROS (“Holder”), and amends that certain Secured Promissory Note, dated
February 7, 2017, issued by the Company to Holder in the principal amount of
$1,000,000 (the “Note”). Capitalized terms that are not otherwise defined in
this Amendment have the meanings given to such terms in the Note.

RECITALS

WHEREAS, the parties desire to extend the Maturity Date of the Note as set forth
herein.

NOW, THEREFORE, in consideration of the foregoing and for other good and
valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, the parties hereto agree as follows:

Section 1. Amendment to Note. Effective as of the date hereof, the Maturity Date
of the Note is hereby extended to June 26, 2017.

Section 2. Effect of Amendment. Except as expressly set forth in this Amendment,
no other changes or modifications to the Note are intended or implied by this
Amendment. To the extent of any conflict between the terms of this Amendment and
the Note, the terms of this Amendment shall control.

Section 3. Miscellaneous. This Amendment may be executed in one or more
counterparts, all of which taken together shall constitute one and the same
instrument, and any of the parties to this Amendment may execute this Amendment
by signing any such counterpart. Facsimile and electronically copied signatures
on this Amendment shall be deemed the equivalent of original signatures. This
Amendment shall be binding upon and inure to the benefit of the parties hereto
and their respective successors and permitted assigns.

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IN WITNESS WHEREOF, the parties hereto have executed or caused this Amendment to
be duly executed by their respective authorized representatives as of the date
first written above.

 

COMPANY: SMITH MICRO SOFTWARE, INC. By:   /s/ Steven M. Yasbek Name:   Steven M.
Yasbek Title:   Chief Financial Officer

 

HOLDER: William W. Smith, Jr. /s/ William W. Smith, Jr. Dieva L. Smith /s/ Dieva
L. Smith

 

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