Press Release

PalmSource Broadens Product Portfolio

New Software Products Available for all Phones and Mobile Devices

3GSM WORLD CONGRESS, CANNES, France, Feb. 14, 2005 — PalmSource, Inc. (NASDAQ: PSRC), provider of Palm OS®, a leading operating system powering next generation phones and mobile devices, today announced it has expanded its product portfolio with the addition of four new software products for mobile phones. With the recent acquisition of China MobileSoft (CMS), PalmSource's product line now includes software for smartphones, feature phones and mobile devices at all price points.

PalmSource acquired CMS as part of its strategy to further extend the Company's leadership as a software provider for phones and mobile devices worldwide. The combination of Palm OS and the new software products enables PalmSource to provide one of the broadest lines of mobile software in the industry, powering mobile phones at all price points in all regions of the world.

CMS provides mobile device manufacturers and ODMs complete, integrated software platforms and user–friendly applications. With the acquisition of CMS, PalmSource now has 10 licensees shipping CMS software on over 30 phone models in China. In the future, PalmSource plans to give the phone applications and phone software the Palm OS look–and–feel and data compatibility, extending the industry–leading Palm OS ease–of–use to all classes of mobile phones worldwide.

"Our strategy is to provide customers a full spectrum of operating system software and applications for phones and mobile devices," said David Nagel, president and CEO of PalmSource, Inc. "In addition to Palm OS® Garnet and Palm OS® Cobalt, we are now providing customers with operating system software for both smartphones and feature phones. We're also offering three new versions of one of the most popular applications for phones–MMS (Multimedia Messaging Service), an email client and a micro browser."

Available now, the new product offerings from PalmSource are:

• PalmSource™ mFone for Smart Phones
  A complete Smart Phone platform that includes everything from the GUI, to device drivers, network protocols, development tools, and end–user applications such as a browser, PIM functions, email, SMS, MMS, MP3 players, games. mFone for Smart Phones is designed to run on Linux operating system distributions.

• PalmSource™ Feature Phone
  A Man Machine Interface (MMI) for Feature Phones that includes a GUI engine and applications such as phone dialer, SMS, MMS, Address Book, PIM, and WAP browser, essentially all that is needed for a Feature Phone user interface. mFone for Feature Phones is designed to run on any Real Time Operating System (RTOS) such as Nucleus and VRTX.

• PalmSource™ mMMS
  An enhanced short message service for mobile phones that enables transmission of graphics, video clips, and sound files. This version developed by PalmSource is a full–featured MMS client for Smart Phones, Feature Phones, and other wireless devices. It is designed to enable users to easily and efficiently receive, send, browse, create, and edit multimedia messages on handheld terminals. It complies with the OMA 2.0 MMS standard and can be ported to most Smart Phone, Feature Phone or wireless device.

• PalmSource™ mBrowser
  A multi–mode micro browser optimized for Smart Phones, Feature Phones, and other wireless devices. The browser is designed to be compact, fast, and supports both WAP (Wireless Application Protocol) and HTML. By supporting multiple standards, this WAP browser from PalmSource is significantly more useful than many micro browsers because it can access all Internet content, not just WAP enabled sites.

About PalmSource
PalmSource, Inc. is the company behind Palm OS®, a leading operating system powering mobile information devices. Approximately 38 million Palm Powered™ handhelds and smartphones have been sold to date worldwide. Industry leaders Aceeca, AlphaSmart, Fossil, Garmin, GSL, Kyocera, Lenovo, palmOne, QTech, 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 Powered Economy. More information about PalmSource is available at www.palmsource.com, www.palmsource.co.uk, www.palmsource.fr, www.palmsource.de, www.palmsource.com/es and www.palmsource.com.cn.

CAUTIONARY NOTE REGARDING 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 regarding our acquisition of China Mobile Soft; our strategy to further extend our leadership as software provider for phones and mobile devices worldwide; and the features and functions of our products. 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 successfully integrate the acquisition of China MobileSoft; our ability to successfully execute our strategy; our ability to identify and meet end users, device manufacturers and ODM requirements; market acceptance of our new product offerings; our ability to deliver a full spectrum of operating system software and applications for phones and mobile devices on schedule and in time to meet market demands; 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 Annual Report on Form 10–K for the period ended May 28, 2004 and our Quarterly Reports on Form 10–Q for the periods ended August 27, 2004 and November 26, 2004. 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.

Copyright © 2005, PalmSource, Inc. PalmSource, Palm OS, Palm Powered, and certain other trademarks and logos appearing on this press release are trademarks or registered trademarks of PalmSource, Inc. or its affiliate in the United States, France, Germany, Japan, the United Kingdom, and other countries. These marks may not be used in connection with any product or service that does not belong to PalmSource, Inc. (except as expressly permitted by a license with PalmSource, Inc.), in any manner that is likely to cause confusion among customers, or in any manner that disparages or discredits PalmSource, Inc., its licensor, its subsidiaries or affiliates. All other brands and trademarks used herein are or may be trademarks of, and are used to identify other products or services of, their respective owners. All rights reserved.