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REDWOOD CITY, Calif. (September 1, 1999) ¾ Phone.com, Inc. (Nasdaq:PHCM), and Siemens today announced that Mannesmann Mobilfunk has awarded Siemens a contract to implement a commercial WAP (Wireless Application Protocol) platform. Under the terms of the agreement, Siemens will provide Mannesmann Mobilfunk a turnkey solution, including the Phone.com™ UP.Link™ server suite, which will allow Mannesmann Mobilfunk, the leader in the German cellular market, to provide new wireless Internet service offerings to its mobile customers starting in September 1999. Being a turn-key provider Siemens provides a complete WAP solution comprising infrastructure systems, WAP platform and WAP applications.

Siemens will integrate Phone.com's UP.Link server solution in Mannesmann Mobilfunk's GSM network which will enable Mannesmann Mobilfunk to offer mobile customers with WAP-capable mobile phones access to a variety of D2 information services. The services will be accessed through mobile phones equipped with a WAP-compatible microbrowser. The Wireless Application Protocol (WAP) is an open, global specification that empowers mobile users with wireless devices to easily access and interact with information and services. WAP standards make it possible for wireless devices to quickly access Web sites and optimize the information displayed. Also, the access to standard HTML web sites is possible via automatic translation. Through WAP, the user cannot only access typical Web sites such as Sports, News and Email on the public Internet, but also have available protected, corporate application specific information over the wireless network.

The user can, for instance, check the cost, length and time of call. Furthermore, WAP enables a multitude of services, from games to PIM functionality such as calendar and address book, which can be accessed through a mobile phone. WAP based services are also an ideal way to open and combine the many possibilities for IN (Intelligent Network) innovative mobile applications.

Beside the typical GSM data communication available today on mobile networks, GPRS represents the future packet data service, which will enhance WAP-based services. GPRS is expected to be available commercially next year.

Siemens has been a system supplier to Mannesmann Mobilfunk since 1993 and installed digital Switching Stations for voice and data services (GPRS), Base Stations, and system solutions for IN into the D2 Network. Siemens is a provider of the complete GSM systems. This is made possible by the rich product portfolio, from manufacturing to delivering a turnkey solution, mobile devices, switching stations and transmission systems. Siemens also offers comprehensive experience in planning, building and operating GSM systems. As a worldwide leader, Siemens has already provided GSM systems to more than 120 network operators in over 65 countries.

About Siemens, Information and Communication Networks Group
The Information and Communications business segment is part of Siemens, a global powerhouse in electrical engineering and electronics with more than $66 billion in sales. Information and Communications consists of the three groups Information and Communication Networks (60,000 employees, $13 billion sales), Information and Communication Products (33,000 employees, $11 billion sales) and Siemens Business Services (20,000 employees, $3.9 billion sales).

Information and Communication Networks is one of the world's leading suppliers of end-to-end solutions for voice, data and mobile networks. Information and Communication Networks provides products, systems, solutions, servicing and support for setting up, operating and maintaining complete corporate and carrier networks. It also offers ancillary services ranging from network planning and financial consultancy through startup support to user training. Further information on this Siemens Group can be found on the Internet at http://www.siemens.com/ic/networks/.

About Phone.com
Phone.com, Inc. is a leading provider of software that enables the delivery of Internet-based services to mass-market wireless telephones. Using its software, wireless subscribers have access to Internet- and corporate intranet-based services, including Email, news, stocks, weather, travel and sports. In addition, subscribers have access via their wireless telephones to network operators' intranet-based telephony services, which may include over-the-air activation, call management, billing history information, pricing plan subscription and voice message management. Phone.com is headquartered in Silicon Valley, California and has regional offices in London and Tokyo. Visit http://www.phone.com for more information.

Except for the historical information contained herein, the matters discussed in this news release are forward-looking statements involving risks and uncertainties that could cause actual results to differ materially from those in such forward-looking statements. Potential risks and uncertainties include, but are not limited to, Phone.com's limited operating history, potential fluctuations in Phone.com's operating results, uncertainties related to the Phone.com's long sales cycle and reliance on a small number of customers, Phone.com's dependence on the acceptance of its products by network operators and wireless subscribers, Phone.com's ability to adequately address the rapidly-evolving market for delivery of Internet-based services through wireless telephones, the need to achieve widespread integration of Phone.com's browser in wireless telephones, competition from companies with substantially greater financial, technical, marketing and distribution resources and the ability of Phone.com to manage a complex set of engineering, marketing and distribution relationships. Further information regarding these and other risks is included in Phone.com's prospectus dated June 10, 1999 and in its other filings with the Securities and Exchange Commission.

For further information:

Contact Phone.com Worldwide Public Relations

Günter Gaugler
81359 München
+49 89 722 36798 [email protected]


Tom Phillips
+1 (202) 434-4820 [email protected]