Mitsubishi Electric, one of the world's leading manufacturers of mobile handsets, and Phone.com, Inc. (Nasdaq: PHCM), a leading provider of mobile Internet software and services, announced today that they have initiated a project to verify the interoperability between their products. Wireless Application Protocol (WAP) interoperability tests will be conducted between Phone.com™'s UP.Link™ Server and Trium's Geo-@ (WAP) from Mitsubishi Electric France.

The intent of these tests is to enhance the compatibility of the two companies' WAP-based products and services, ensuring that they will operate together independent of the manufacturer. The tests are an important step for both companies in further establishing WAP as a truly global standard for mobile data communication. Phone.com has been undertaking interoperability testing for WAP-compatible products and services with several vendors, and offers its test facility to WAP product developers, vendors, and operators in an effort to reduce interoperability testing time.

Mr. Yamanaka, president director general of MEF, said "We are delighted to be working with Phone.com on this project. By providing a connection to the Internet through a mobile phone, we will empower end-users with a handset that offers an easy solution to everyday life. Our first WAP product, the Geo-@ (WAP), is both an advanced information gathering tool and an essential accessory for consumers and business users."

"Interoperability is an important step to effective WAP deployment in the mass market," said Jeff Damir, vice president of business development for Phone.com. "As one of the co-founders of the WAP Forum, we are committed to ensuring maximum interoperability for all suppliers of WAP equipment."