REDWOOD CITY, Calif., September 5, 2001 - Openwave Systems, Inc. (Nasdaq:OPWV), the worldwide leader of open IP-based communications infrastructure software and applications, today announced immediate availability of version 3.0 of the Openwave Unified Messaging solution. This third generation solution is a critical component of Openwave's broad Messaging Services strategy. Based on IP industry standards, Openwave's Messaging Services enable communication service providers (CSPs) to deliver branded and customized messaging services tailored to specific customer segments with a single solution.

"Openwave Unified Messaging 3.0 is a key milestone in our strategy to provide a broad set of Messaging Services to our customers," said Marc Linden, group vice president and general manager at Openwave. "Openwave's Unified Messaging delivers a compelling experience to the end user, allowing them to finally realise the full potential of true unification-a crucial benefit for CSPs who must win in messaging services to retain customers in the Internet world."

With Unified Messaging 3.0, subscribers have the ability to access voice, fax and email messages from a single mailbox using a wireline or wireless phone, or Internet-enabled mobile phone or PC. Openwave's solution offers subscribers an easy to use application with a consistent user interface and fully integrated PIM. Openwave Unified Messaging enables "Voicemail Anywhere", allowing users to forward voice messages to anyone with an email address. In addition, users can "Reply-by-Voice" to any message, and can personalize the service so that they will be notified of urgent emails or voice messages via PC, telephone, or pager.

By allowing a CSP to quickly deploy customized and branded services, Openwave's VoiceXML-based Unified Messaging application enables CSP's to remain central to the subscriber relationship and offers an opportunity to increase revenue and reduce churn. Openwave's Unified Messaging offers CSPs a cost-efficient solution designed to use industry standard components for operational simplicity, and elimination of redundancy. Openwave's Unified Messaging is also designed to work with Cisco's AS5300 voice gateway and AS5350 and AS5400 universal gateways.

The Openwave Unified Messaging solution is based on Openwave's proven IP messaging infrastructure, which currently has more than 180 million licensed seats. Customers using Openwave Unified Messaging include ZoomTown, wholly owned Internet broadband subsidiary of Broadwing Inc; BT Genie and iBasis.

Openwave's Messaging Services, as well as each product individually, are designed to give CSPs the flexibility to offer subscribers a more compelling, easy-to-use, and personalized communications experience. All of Openwave's Messaging Services are built on an IP standards-based architecture with shared common elements and are designed to meet the needs of CSP's current and next generation messaging needs. Openwave's Messaging Services include generally available products: Unified Messaging, Email, Mobile Email; as well as Instant Messaging and Multimedia Messaging, which are expected to be available in the future.

About Openwave

Openwave Systems, Inc. (Nasdaq: OPWV) is a global leader in IP-based open communications infrastructure software and applications. Openwave is a global company headquartered in Redwood City, California. For more information please visit www.openwave.com.

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 business strategy, development plans and product offerings to respond to the needs of our current, new and potential customers, suppliers and strategic partners; (b) risks specifically associated with the integration of the businesses of Phone.com and Software.com and the ability to achieve the expected benefits of the merger (including but not limited to those risks associated with the ability to (i) integrate effectively the two companies' product lines, technology, operations and personnel, and (ii)) effectively manage a larger more geographically dispersed organization); (c) 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 or use of the Company's software; and (d) general risks of the Internet and wireless and wireline telecommunications sectors.

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 Openwave's Quarterly Report on Form 10-Q for the quarter ended December 31, 2000, Phone.com's and Software.com's most recently filed Annual Reports on Form 10-K, and Phone.com's registration statement on Form S-4 as filed on October 10, 2000. All documents also are available through the SEC's Electronic Data Gathering Analysis and Retrieval system (EDGAR) at www.sec.gov or from Openwave's Web site at www.openwave.com. The Company assumes no obligation to update the forward-looking statements included in this document.

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

For more information please contact:
Openwave Systems Inc.
Rowan Benecke
PR21
+1 415 369 8102
rowan_benecke@pr21.com

Openwave (Europe) Limited
Chris Cartwright
Bite Communications Ltd.
+44 20 8600 6729
chrisc@bitecomm.co.uk