Syniverse Announces Participation at Upcoming Investor Conferences

Syniverse Corporation, the "world's most connected company"^TM and the premier global technology provider of mission-critical mobile platforms for carriers and enterprises, announced that executives from the Company will participate in the following upcoming investor conferences.

In August 2021, Syniverse announced their plan to go public through a merger agreement with M3-Brigade Acquisition II Corp. (NYSE: MBAC). Upon closing of the transaction, Syniverse will be listed on the New York Stock Exchange under the ticker "SYNV."

Details of the December conferences are as follows:

• December 2: Wells Fargo Virtual 5^th Annual TMT Summit

Andrew Davies, CEO of Syniverse will participate in a fireside chat at 11:20 EST on December 2^nd. The Company will also be conducting virtual meetings with investors at the conference.

• December 7: Barclays Global Technology, Media, and Telecommunications Conference

Simeon Irvine, CFO of Syniverse will participate in a fireside chat at 14:25 EST on December 7. The Company will also be conducting virtual meetings with investors at the conference.

A livestream and a webcast link to a recording of each event will be made available and posted to the M3 Brigade Acquisition II Corp. ("MBAC") investor relations website shortly afterwards.

About Syniverse

Syniverse is a leading global provider of unified, mission-critical platforms enabling seamless interoperability across the mobile ecosystem. Syniverse makes global mobility work by enabling consumers and enterprises to connect, engage, and transact seamlessly and securely. Syniverse offers a premier communications platform that serves both enterprises and carriers globally and at scale. Syniverse's proprietary software, protocols, orchestration capabilities and network assets have allowed Syniverse to address the changing needs of the mobile ecosystem for over 30 years. Syniverse continues to innovate by harnessing the potential of emerging technologies such as 5G, IoT, RCS and CPaaS for its customers.

Information About the Proposed Business Merger and Where to Find It

In connection with the proposed transaction, MBAC has filed a preliminary proxy statement and plans to file a definitive proxy statement with the SEC. MBAC'S STOCKHOLDERS AND OTHER INTERESTED PERSONS ARE ADVISED TO READ, WHEN AVAILABLE, THE PRELIMINARY PROXY STATEMENT, THE AMENDMENTS THERETO, AND THE DEFINITIVE PROXY STATEMENT AND DOCUMENTS INCORPORATED BY REFERENCE THEREIN FILED IN CONNECTION WITH THE PROPOSED TRANSACTION, AS THESE MATERIALS WILL CONTAIN IMPORTANT INFORMATION ABOUT MBAC, SYNIVERSE AND THE PROPOSED TRANSACTION. When available, the definitive proxy statement will be mailed to the stockholders of MBAC as of a record date to be established for voting on the proposed transaction. Stockholders will also be able to obtain copies of the preliminary proxy statement, the definitive proxy statement and other documents filed with the SEC that will be incorporated by reference therein, without charge, once available, at the SEC's website at http://www.sec.gov, or by directing a request to: M3-Brigade Acquisition II Corp., 1700 Broadway ? 19th Floor, New York, New York 10019.

Participants in the Solicitation

MBAC and its directors and executive officers may be deemed participants in the solicitation of proxies of MBAC's stockholders with respect to the proposed transaction. A list of those directors and executive officers and a description of their interests in MBAC will be filed in the proxy statement for the proposed transaction and available at www.sec.gov. Additional information regarding the interests of such participants will be contained in the proxy statement for the proposed transaction when available.

Syniverse and its directors and executive officers may also be deemed to be participants in the solicitation of proxies from the stockholders of MBAC in connection with the proposed transaction. A list of the names of such directors and executive officers and information regarding their interests in the proposed transaction will be included in the proxy statement for the proposed business combination.

No Offer or Solicitation

This press release shall not constitute a solicitation of a proxy, consent, or authorization with respect to any securities or in respect of the proposed transaction. This press release shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any states or jurisdictions in which such offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of such state or jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of section 10 of the Securities Act of 1933, as amended.