March 27, 2008

                                POWER OF ATTORNEY

        KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints each of Stephen L. Ritchie, P.C., Jody S. Gale, Paul Zier and Thomas N.
Blanchard signing singly, the undersigned's true and lawful attorney-in-fact to:
(i) execute for and on behalf of the undersigned, in the undersigned's capacity
as an officer and/or director and/or owner of greater than 10% of the
outstanding Common Stock of Syniverse Holdings, Inc., a Delaware corporation
(the "Company"), Forms 3, 4, and 5 in accordance with Section 16(a) of the
Securities Exchange Act of 1934 and the rules thereunder as well as a
Schedule 13D or Schedule 13G and any amendments thereto; (ii) do and perform any
and all acts for and on behalf of the undersigned which may be necessary or
desirable to complete and execute any such Form 3, 4, or 5 and Schedule 13D or
Schedule 13G and any amendments thereto and timely file such form with the
United States Securities and Exchange Commission and any stock exchange or
similar authority, including the New York Stock Exchange; and (iii) take any
other action of any type whatsoever in connection with the foregoing which, in
the opinion of such attorney-in-fact, may be of benefit to, in the best interest
of, or legally required by, the undersigned, it being understood that the
documents executed by such attorney-in-fact on behalf of the undersigned
pursuant to this Power of Attorney shall be in such form and shall contain such
terms and conditions as such attorney-in-fact may approve in such
attorney-in-fact's discretion.

        The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary, or proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted. Each of the undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934.

        This Power of Attorney shall remain in full force and effect until each
of the undersigned is no longer required to file Forms 3, 4, and 5 or
Schedule 13D or Schedule 13G with respect to the undersigned's holdings of and
transactions in securities issued by the Company unless earlier revoked by each
of the undersigned in a signed writing delivered to the foregoing
attorneys-in-fact.

        IN WITNESS WHEREOF, the undersigned have caused this Power of Attorney
to be executed as of the date first written above.

                                        /s/ Robert J. Gerrard, Jr.
                                        ---------------------------------------
                                        Name: Robert J. Gerrard, Jr.