Press Release

PalmSource and Sprint Collaborate To Drive Growth of the Smart Device Market

PalmSource Signs Sprint as Charter Member of Palm Powered MobileWorld Program

LAS VEGAS, Nev., Nov. 17, 2003, COMDEX Booth #10448 - PalmSource, Inc. (NASDAQ: PSRC) provider of Palm OS®, a leading operating system powering next generation mobile devices and smartphones, and Sprint, (NYSE: FON, PCS) which operates the largest 100-percent digital, nationwide PCS wireless network in the United States, today announced that Sprint is the first mobile operator to be signed as a charter member of the Palm Powered MobileWorld program. The program, announced separately today, will enable Sprint to offer their Palm Powered™ PCS Vision Smart Device customers the most comprehensive selection of enterprise and consumer applications.

According to IDC (2002), the converged mobile device market is the fastest growing, revenue-producing segment of the phone market. The Palm Powered MobileWorld program is designed to enable mobile operators, infrastructure providers and software developers to take advantage of the increased revenue opportunities created by Palm Powered converged mobile devices.

As a charter member of the Palm Powered MobileWorld program, Sprint will collaborate with PalmSource in several areas including cooperative marketing and leveraging the more than 275,000-strong Palm OS developer community to meet the needs of key vertical markets. This collaboration effort will enable Sprint to offer their customers one of the largest and most user-friendly catalogs of mobile applications for Palm Powered PCS Vision Smart Devices.

"I am delighted to welcome Sprint as the charter member of the Palm Powered MobileWorld program," said David Nagel, president and CEO of PalmSource. "Sprint has been a long-standing supporter of Palm Powered smart devices, and we look forward to continue innovating with Sprint in order to deliver the industry's best and most user-friendly wireless products and services to our joint customers."

"With the launch of highly successful Palm Powered PCS Vision Smart Devices such as the Treo 600 by Handspring and the SPH-i500 by Samsung, Sprint has extended its leadership in innovation and integration to the smart devices category," said Phil Bowman, vice president of business marketing, PCS division of Sprint. "We look forward to leveraging PalmSource's strength in key vertical markets and platform innovation to help meet the need for custom-tailored wireless solutions on smart devices that allow our business customers to be more effective and more competitive."

More information regarding the Palm Powered MobileWorld program can be found at www.palmsource.com/partners.

About Sprint
Sprint is a global integrated communications provider serving more than 26 million customers in over 100 countries. With approximately 70,000 employees worldwide and nearly $27 billion in annual revenues, Sprint is widely recognized for developing, engineering and deploying state-of-the-art network technologies, including the United States' first nationwide all-digital, fiber-optic network and an award-winning Tier 1 Internet backbone. Sprint provides local communications services in 39 states and the District of Columbia and operates the largest 100-percent digital, nationwide PCS wireless network in the United States. For more information, visit www.sprint.com.

About PalmSource
PalmSource, Inc. is the company behind Palm OS, a leading operating system for mobile information devices. More than 30 million Palm Powered handhelds and smartphones have been sold to date worldwide. Industry leaders Aceeca, AlphaSmart, Fossil, Garmin, GSL, HuneTec, Kyocera, Lenovo, palmOne, PerComm, Samsung, Sony, Symbol Technologies and Tapwave license Palm OS to create diverse mobile devices that meet unique customer needs. Palm OS has given rise to a large community of users, enterprises, developers and manufacturers, who together make up the Palm economy. More information about PalmSource is available at http://www.palmsource.com, http://www.palmsource.co.uk, http://www.palmsource.fr, http://www.palmsource.de and http://www.palmsource.com.cn.

Palm OS is a registered trademark and Palm Powered is a trademark of Palm Trademark Holding Company, LLC. Other brands may be trademarks of their respective owners.

Forward-Looking Statements
This press release contains forward-looking statements that involve risks and uncertainties, as well as assumptions that, if they never materialize or prove incorrect, could cause our results to differ materially from those expressed or implied by such forward-looking statements. Such forward-looking statements include, without limitation, statements related to the growth of converged devices and wireless market and our ability to benefit from any growth in the mobile device and smart phone markets. The risks and uncertainties that could cause our results to differ materially from those expressed or implied by such forward-looking statements include, without limitation, our ability to compete with existing or new competitors, our ability to successfully penetrate new markets or the ability of new markets to grow as we anticipate, general economic conditions in the U.S. and abroad and other risks and uncertainties contained in our public announcements, reports to stockholders and other documents filed with and furnished to the Securities and Exchange Commission, including our Quarterly Report on Form 10-Q for the period ended August 29, 2003. All forward-looking statements in this press release are based on information available to us as of the date hereof, and we assume no obligation to update these forward-looking statements.