News Release

JAMDAT Mobile Launches 3D Bowling For Verizon Wireless V CAST Customers

3D Version of Popular Bowling Game Now Available Exclusively on the Nation's First 3G Consumer Wireless Broadband Multimedia Service

January 31, 2005

Jeffrey Nelson
Jeffrey.Nelson@VerizonWireless.com
908-306-4824Dena Cook
JAMDAT Mobile Inc.
dena.cook@zenogroup.com
310-566-2283

LOS ANGELES and BEDMINSTER, NJ — Global wireless entertainment publisher JAMDAT Mobile Inc. (NASDAQ: JMDT) and Verizon Wireless, the nation's leading wireless provider, announced today the availability of JAMDAT 3D Bowling on V CAST, the nation's first true 3G wireless broadband consumer multimedia service. V CAST enables customers to view crystal clear graphics for 3D games and short content because it runs on Verizon Wireless' Evolution-Data Optimized (EV-DO) network — the only widely available wide-area wireless broadband network in the United States. The V CAST coverage area, which mirrors the Verizon Wireless EV-DO network, is available in more than 30 major metropolitan markets and covers more than 75 million people.

JAMDAT 3D Bowling allows players to transform their mobile phones into virtual bowling alleys, with new, state-of-the-art 3D graphics. The high-tech graphics engine enables gamers to see straight down the lane and change camera views while they bowl. With the new wide selection of lanes, balls and pin colors and multiplayer options, JAMDAT 3D Bowling is the most complete bowling experience outside the neighborhood bowling alley.

"JAMDAT 3D Bowling takes one of the most popular video games to a whole new level with an incredible 3D gameplay experience on V CAST from Verizon Wireless," said Mitch Lasky, Chairman and CEO of JAMDAT Mobile Inc. "JAMDAT continues to be at the forefront of gameplay innovation and third-generation multimedia services are the next step in wireless entertainment."

V CAST's array of hot new multimedia programming is located in the Get It Now® virtual store — customers can access video from favorite news, sports and entertainment providers in the getVIDEO shopping aisle and check out new cutting-edge 3D games, including JAMDAT 3D Bowling, in the getGAMES aisle. V CAST also gives customers unlimited airtime to browse and view applications in the other familiar Get It Now shopping aisles — such as getTONES and getGOING.

For $15.00 monthly access added to their Verizon Wireless calling plan, customers get the V CAST VPak which includes unlimited access to a wide array of more than 300 daily updated video clips from leading content providers. Unlimited basic video clips are included, but application download fees will still apply for 3D games, premium video clips, and all other Get It Now applications. JAMDAT 3D Bowling is available in the getGAMES shopping aisle of the Get It Now virtual store for $2.49 monthly access or $8.99 for unlimited use purchase. There are no airtime charges to download JAMDAT 3D Bowling or stream and watch other V CAST short content. For a limited time, customers who sign up for V CAST will receive two months of service free. Verizon Wireless V CAST customers also receive monthly access and unlimited browsing on Verizon Wireless' Mobile Web 2.0SM news and information service. In addition, customers can choose from premium video clips, available at additional cost that will include music videos and more.

V CAST customers can play JAMDAT 3D Bowling on the new 3G-capable VX8000 phone that allows customers to download content with just a few clicks and experience outstanding clarity and sharpness. The LG VX8000 is available to Verizon Wireless customers for $199.99 after $70 rebate with a two-year customer agreement. For more information about Verizon Wireless products and services, visit a Verizon Wireless Communications Store, call 1-800-2 JOIN IN or go to www.verizonwireless.com.  

For additional handset availability, please refer to JAMDAT's Game Finder at www.jamdat.com.  

(EDITORS: High-resolution images of JAMDAT 3D Bowling on V CAST are available online. Log on to www.verizonwireless.com/multimedia to preview and request images.)

About Verizon Wireless
Verizon Wireless owns and operates the nation's most reliable wireless network, serving 43.8 million voice and data customers. Headquartered in Bedminster, NJ, Verizon Wireless is a joint venture of Verizon Communications (NYSE:VZ) and Vodafone (NYSE and LSE: VOD). Find more information on the Web at www.verizonwireless.com. To receive broadcast-quality video footage of Verizon Wireless operations, log on to the Verizon Wireless Multimedia Library at www.verizonwireless.com/multimedia.  

About JAMDAT Mobile
JAMDAT Mobile Inc. (NASDAQ: JMDT) 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, Lemonade Tycoon(TM), Bejeweled, The Lord of the Rings®, Tony Hawk's® Underground and Scrabble®. 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 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.

©2005 JAMDAT Mobile Inc. JAMDAT, JAMDAT Mobile and the bubbles logo are trademarks of JAMDAT Mobile Inc.

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