FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * WILCOCK PAUL A   2. Issuer Name and Ticker or Trading Symbol SYNIVERSE HOLDINGS INC [SVR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Executive Officer (Last) (First) (Middle) C/O SYNIVERSE HOLDINGS, INC., 8125 HIGHWOODS PALM WAY 3. Date of Earliest Transaction (Month/Day/Year) 03/31/2008 (Street) TAMPA, FL 33647 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock, par value $0.001 per share 03/31/2008   F   2,116 D $ 16.66 133,341 D   Common Stock, par value $0.001 per share 03/31/2008   D(1)   24,000 D $ 0 109,341 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Stock Options (right to buy)

$ 16.6

03/31/2008

D(2)

26,666

(2)

05/12/2016

Common Stock

26,666

(3)

13,334 (4)

D

Stock Options (right to buy)

$ 16.6

03/31/2008

A(2)

26,666

(2)

12/31/2008

Common Stock

26,666

(3)

26,666 (2)

D

Stock Options (right to buy)

$ 12.04

03/31/2008

D(5)

13,333

(5)

05/11/2017

Common Stock

13,333

(3)

26,667 (4)

D

Stock Options (right to buy)

$ 12.04

03/31/2008

A(5)

13,333

(5)

12/31/2008

Common Stock

13,333

(3)

13,333 (5)

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
WILCOCK PAUL A C/O SYNIVERSE HOLDINGS, INC. 8125 HIGHWOODS PALM WAY TAMPA, FL 33647			Executive Officer

Signatures

/s/ Jody S. Gale under a Power of Attorney		04/02/2008
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Pursuant to Mr. Wilcock's separation agreement, unvested shares of restricted stock were forfeited.
(2)	The reported transaction involved an amendment to an outstanding option to purchase 40,000 shares, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. Mr. Wilcock's separation agreement provides that with respect to 13,333 options, previously set to vest on May 12, 2008, will now vest on March 31, 2008. The 13,333 options now vesting on March 31, 2008 and the 13,333 options that previously vested on May 12, 2007 were set to expire 90 days following Mr. Wilcock's termination from the Company will now expire on December 31, 2008.
(3)	Per SEC instruction, column left blank.
(4)	The remaining options will expire according to the terms of the Stock Option Award Agreement and the 2006 Long-Term Equity Incentive Plan.
(5)	The reported transaction involved an amendment to an outstanding option to purchase 40,000 shares, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. Mr. Wilcock's separation agreement provides that with respect to 13,333 options, previously set to vest on May 11, 2008, will now vest on March 31,2008. The options, previously set to expire 90 days following his termination from the Company, now expire on December 31, 2008.

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