Press Release - 2005

LOS ANGELES--(BUSINESS WIRE)--Global wireless entertainment publisher JAMDAT Mobile Inc. (NASDAQ:JMDT) announced today that it will cooperate with ATI Technologies Inc., one of the leading providers of graphics, video and multimedia products for desktop, workstation and notebook PCs, digital televisions, cell phones and game consoles, to develop new 3D wireless entertainment applications.

"3D games are an important part of the future of mobile gaming and by working with ATI, a leader in the 3D graphics space, we will continue to offer the most sophisticated games for wireless, with enhanced graphics and faster run times," said Mitch Lasky, Chairman and CEO of JAMDAT Mobile Inc. "Our current 3D titles -- 'JAMDAT Bowling 3D' and 'Tony Hawk's Pro Skater: 3D Mobile Edition' -- are already immensely popular with consumers. Through our relationship with ATI, we intend to publish 3D products that push the boundaries of innovation and fun."

"JAMDAT has driven the mobile market to new heights by developing titles that consistently remain at the forefront of wireless technology," said Neal Robison, Director of ISV Relations, ATI Technologies Inc. "We are elated that JAMDAT will continue to push visual quality and performance with their content by supporting ATI's Imageon(R) 3D graphics in full hardware 3D gaming."

(C)2005 JAMDAT Mobile Inc. JAMDAT, JAMDAT Mobile and the bubbles logo are trademarks of JAMDAT Mobile Inc. All other trademarks are the property of their respective owners.

About ATI Technologies
ATI Technologies Inc. is the world leader in the design and manufacture of innovative 3D graphics and digital media silicon solutions. An industry pioneer since 1985, ATI is the world's foremost visual processor unit (GPU) provider and is dedicated to delivering leading-edge performance solutions for the full range of PC and Mac desktop and notebook platforms, workstation, set-top and digital television, game console and handheld device markets. With 2004 revenues of US $2 billion, ATI has more than 2,700 employees in the Americas, Europe and Asia. ATI common shares trade on NASDAQ (ATYT) and the Toronto Stock Exchange (ATY).

About JAMDAT Mobile
JAMDAT Mobile Inc. is a global publisher of wireless entertainment applications, including games, ring tones, images and other content. JAMDAT's application portfolio is based on original and licensed intellectual properties and includes JAMDAT Bowling, Tetris(R), Downtown Texas Hold 'Em, Lemonade Tycoon(R), Bejeweled(R), The Lord of the Rings(R), Tony Hawk's(R) Underground and Scrabble(R). JAMDAT distributes its applications through wireless carriers around the world. For more information, please visit www.jamdat.com.

Safe Harbor Statement -- JAMDAT Mobile Inc.
This press release may include forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including statements related to anticipated revenues, expenses, earnings, operating cash flows, the outlook for JAMDAT's markets and the demand for its products. Factors that could cause JAMDAT's actual results to differ materially from these forward-looking statements include its ability to integrate the acquisition of Blue Lava Wireless, anticipated growth in the handset market, its ability to effectively market and sell products in diverse market segments, its reliance on a limited number of products and third-party vendors and distributors, its ability to expand studio operations, increases in fulfillment costs, disruptions to information technology systems, unpredictable events and circumstances relating to international suppliers, increased competition, government regulatory action and general economic conditions. Please refer to JAMDAT's reports and filings with the Securities and Exchange Commission for a further discussion of these risks and uncertainties. Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date they are made. JAMDAT undertakes no obligation to update publicly any forward-looking statements to reflect new information, events or circumstances after the date they were made or to reflect the occurrence of unanticipated events.

Contact Information

JAMDAT Mobile Inc.
Dena Cook, 310-566-2283
dena.cook@zenogroup.com