Popular Wireless Voting / Interactive Activities Defined by TCS' Proven 'Short Code' Messaging Technology

ANNAPOLIS, Md.--June 7, 2005--TeleCommunication Systems, Inc. (TCS) (NASDAQ: TSYS), a global leader in location and mission critical wireless data technology, today announced that the U.S. Patent and Trademark Office has issued patent number 6,891,811 titled "Short Messaging Service Center Mobile-Originated To HTTP Internet Communications." This patent is the fourth issued to TCS in 2005 with a total of 34 patents issued. TCS has over 80 additional patent applications pending in the United States and jurisdictions throughout the world.

TCS' "Short Messaging Service Center Mobile-Originated To HTTP Internet Communications" patent describes methods by which users can send short messages from wireless handsets to external applications using a variety of Internet Protocol (IP) methods, including HyperText Transfer Protocol (HTTP) Internet Protocol and Short Messaging Peer-to-Peer (SMPP) and includes the use of Pre-Defined Addresses. The patent claims also describe methods in which a reply text message is sent back from the application to the user's wireless device. Protocol conversions and broadcasting to multiple Uniform Resource Locators (URLs) are also addressed.

The patent's technology provides the basis for wireless users to interact with web sites to participate in popular voting/polling and search/fact-finding activities. Recent cell phone voting campaigns have generated millions of text messages, with Cingular recently announcing that "American Idol" recorded over 41 million text messages during the show's 12-week voting period. Search tools, such as Google's recently announced Short Message Service (SMS), can use the methods described by the patent to receive inquiries and deliver information to a wireless device. Such campaigns and services have been described as the turning point for U.S. wireless carriers looking for a catalyst to generate recurring text-messaging revenues.

These interactive wireless solutions typically prompt the user to send a message from a handheld wireless device to a pre-defined address such as a short code that requires translations from their originating format to the prevailing SMS languages of the Internet - HTTP and SMPP. A re-translated message is sometimes sent back to the wireless device in a readable format. While the wireless user is oblivious to the technology behind the data translations, the end result is a user-friendly experience and increased repeat usage of the text messaging functionality.

TCS' technology continues to provide the necessary wireless data tools to give the user a positive, useful and viral experience, expanding users' demand for messaging services and, therefore, carriers' revenue avenues.

"TCS' wireless technology patents are fruits of our pioneer role in short text messaging in the United States," said Maurice B. Tose, Chairman, President and CEO of TeleCommunication Systems. "Our investments in technology continue to result in an ever-expanding patent portfolio that protects those investments, offers revenue-generating value to our customers, presents competitive advantages for our partners, as well as royalty and license opportunities from other users of our company's intellectual property," Tose stated.

ABOUT TELECOMMUNICATION SYSTEMS, INC.

TeleCommunication Systems, Inc. (TCS) (NASDAQ:TSYS) is a leading provider of mission critical wireless data solutions to carriers, enterprise and government customers. TCS' wireless data offerings include location-based Enhanced 9-1-1 and commercial services, messaging and location service infrastructure for wireless operators, real-time financial market data and alerts for investment professionals, mobile asset tracking and proof of delivery applications, Mobeo(TM) mobile office service; and encrypted deployable communication systems. For more information visit www.telecomsys.com.

This announcement contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities and Exchange Act of 1934, as amended.

These statements are based upon TCS' current expectations and assumptions that are subject to a number of risks and uncertainties that would cause actual results to differ materially from those anticipated.

The actual results realized by the Company could differ materially from the statements made herein, depending in particular upon the risks and uncertainties described in the Company's filings with the Securities and Exchange Commission (SEC). These include without limitation risks and uncertainties relating to the Company's financial results and the ability of the Company to realize royalty revenue on licensed technology.

Existing and prospective investors are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. The Company undertakes no obligation to update or revise the information in this press release, whether as a result of new information, future events or circumstances, or otherwise.