Openwave and Montavista Partner to Offer Complete Solution for Advanced Mobile Phones with Linux

First to Market with Integrated Suite of Mobile Phone Software for Linux-based Phones

REDWOOD CITY, Calif. - March 23 , 2004 - Openwave Systems Inc. (Nasdaq: OPWV), the leading provider of open software products and services for the communications industry, and MontaVista Software Inc., the company powering the embedded revolution, today announced they will cooperate to further develop the emerging ecosystem around advanced Linux-based phones. Using integrated, portable software platforms to help manufacturers perfect the user experience, Openwave and MontaVista Software will continue to optimize Openwave Phone Suite Version 7 (V7) for MontaVista® Linux® Consumer Electronics Edition (CEE) . Each company will begin co-marketing to bring a powerful, yet flexible, software solution for Linux-based phones to their respective customers immediately.

Since September 2003, V7 has been tested against and is interoperable with MontaVista® Linux® CEE. CEE includes advanced features like Dynamic Power Management, rapid boot, execute-in-place and tight integration with supported hardware platforms. Leading phone manufacturers such as Motorola have already announced next generation handsets and development efforts based on MontaVista Linux.

Today, Openwave and MontaVista Software are working to bring together the security, control and rapid innovation of Linux with the mobile industry's open standards. This agreement will permit operators and manufacturers to take charge of their software future by promoting greater understanding of the advantages of Linux and the role that integrated software environments play in ongoing service development. Openwave and MontaVista are cooperating to further integrate their respective solutions, allowing manufacturers to more efficiently manage the addition and integration of new service enabling software. The two companies also plan to work to drive the evolution of third party applications necessary to deliver complete Linux-based phones . Manufacturers and operators now have a clear path from today's mass-market phones to high-function Linux phones that support an accelerating pace of operator service development.

"We are excited to strengthen our relationship with Openwave to further enable the mobile Linux ecosystem," said Sheila Baker, vice president, Marketing, MontaVista Software, Inc. "Both MontaVista Software and Openwave are proud to deliver best-in-class software designed to enhance the mobile phone experience and this agreement shows our commitment to do just that."

"This announcement proves that we are committed to supporting the evolving needs of our customers as they develop high function phones," said Rob Williams, general manager of client software group, Openwave. "Working with MontaVista, a leading provider of embedded Linux, allows us to take advantage of the rapid innovations in the Linux community."

Openwave will demonstrate Openwave Phone Suite Version 7 (V7) and MontaVista® Linux® Consumer Electronics Edition (CEE) using a Texas Instruments Innovator (OMAP 1510) at CTIA. Come see us at the Openwave booth #1417 in Hall B2 throughout the show.

About MontaVista Software Inc.
MontaVista Software is a leading global supplier of systems software and development tools for intelligent connected devices and associated infrastructure. MontaVista powers the embedded revolution by providing Open Source GNU/Linux-based software solutions. Founded in 1999 by real-time operating system pioneer James Ready, MontaVista offers a family of products that address software developer needs encompassing applications ranging from communications infrastructure to consumer electronics. MontaVista products include MontaVista Linux Professional, Consumer Electronics and Carrier Grade Editions. MontaVista DevRocket, a powerful integrated development environment, delivers state-of-the-art development tools across all the product editions. MontaVista Graphics offers a rich GUI development tools platform.

Headquartered in the heart of Silicon Valley, in Sunnyvale, Calif., MontaVista Software is a privately held company funded by leading investors such as Alloy Ventures, US Venture Partners, RRE Ventures, WR Hambrecht + Co., IBM, Intel Capital, Sony, Panasonic (Matsushita), Toshiba America and Yamaha Corporation. For more information about MontaVista Software, please visit .

About Openwave
Openwave Systems Inc. (Nasdaq: OPWV) is the leading independent provider of open software products and services for the communications industry. Openwave's breadth of products, including mobile phone software, multimedia messaging software (MMS), email, location and mobile gateways, along with its worldwide expertise enable its customers to deliver innovative and differentiated data services. Openwave is a global company headquartered in Redwood City, California. For more information please visit .

Cautionary Note Regarding Forward Looking Statements
This release contains forward-looking statements relating to expectations, plans or prospects for Openwave Systems Inc. that are based upon the current expectations and beliefs of Openwave's management and are subject to certain risks and uncertainties that could cause actual results to differ materially from those described in the forward-looking statements. In particular, the following factors, among others, could cause actual results to differ materially from those described in the forward-looking statements: (a) the ability to make changes in our development plans and product offerings to respond to the needs of our current, new and potential customers, suppliers and strategic partners; (b) risks associated with the development and licensing of software generally, including potential delays in software development and technical difficulties that may be encountered in the development, porting, or use of our software; (c) the willingness and ability of handset manufacturers and communication service providers to invest in and rapidly adopt new software and technology; (d) the ability to successfully partner with other companies; (e) the ability to acquire additional companies and technologies and integrate such acquisitions; (f) increased global competition; and (g) technological changes and developments.
For a detailed discussion of these and other cautionary statements, please refer to the risk factors discussed in filings with the U.S. Securities and Exchange Commission ("SEC"), including but not limited to the Company's Annual Report on Form 10-K for the fiscal year ended June 30, 2003, the Company's Quarterly Report on Form 10-Q for the quarter ended December 31, 2003, and subsequently filed reports. All documents also are available through the SEC's Electronic Data Gathering Analysis and Retrieval system (EDGAR) at or from Openwave's Web site at The Company assumes no obligation to update the forward-looking statements included in this document.

Openwave and the Openwave logo are trademarks and or registered trademarks of Openwave Systems Inc. All other trademarks are the properties of their respective owners.


MontaVista Software
Joe Samagond
Director of Marketing and Corporate Communications
MontaVista Software
Phone: (408) 328-9234

Patricia Colby
PR Strategy and Business Development
Pacifico, Inc.
Phone: (408) 293 8600 x340

Openwave Systems Inc.
Candace Locklear
Phone: (650) 480 4316