OmniSky and BackWeb Collaborate to Provide Next-Generation Automatic Software and Content Delivery to OmniSky Customers

SAN FRANCISCO – June 5, 2001– OmniSky Corporation (Nasdaq: OMNY), a global provider of award-winning wireless applications and services, and BackWeb Technologies, Inc. (Nasdaq: BWEB), a leading provider of push communications infrastructure for e-businesses, today announced that they will work together to provide automatic software and content delivery to subscribers of OmniSky's wireless e-mail and Internet service. This collaboration is the first wireless update solution and will significantly enhance the upgrade experience for OmniSky customers by simplifying and accelerating the process of upgrading software and content. In addition, the solution will enable better integration of the OmniSky service into corporate environments, while simultaneously reducing OmniSky technical support costs.

This collaboration will significantly enhance the upgrade experience for OmniSky customers by simplifying and accelerating the process of upgrading software and content.

Using BackWeb's technology and its own proprietary technology, OmniSky is building an end-to-end, personalized, proactive solution for delivering software, content, and information updates from OmniSky servers to subscribers' mobile devices. BackWeb's Polite® technology provides the means to automatically deliver software upgrades and content updates in a seamless and timely manner to subscribers' PCs. To extend the BackWeb solution to wireless devices, OmniSky is developing a proprietary software conduit that allows synchronization between a PC and a handheld device. OmniSky expects this new combined solution to result in greater customer satisfaction, better integration of its service into corporate environments, and reduced technical support costs.

"By using BackWeb's robust push technology to automate software and content delivery, the upgrade process will be noticeably faster and easier for our individual subscribers as well as corporate customers," said Elan Amir, chief technology officer at OmniSky. "This is a flexible and scalable solution that allows us to significantly enhance our service for mobile professionals and enterprise customers, while at the same time reducing overall costs."

"OmniSsky is making strategic use of its network to streamline and automate the delivery of valuable content to its worldwide customer base," said Erez Lorber, vice president of business development of BackWeb Technologies. "Using BackWeb's technology, OmniSky provides a competitive advantage by ensuring that no matter where individual or corporate customers are located, the company can deliver the right information to the right peopleits customers at the right time."

Subscribers will regularly receive updates on their OmniSky-enabled devices when synchronizing their handheld units with their PCs. For example, when a new software update is available, it will be "pushed" to the subscriber's PC. The next time the user "syncs" the handheld device with the PC, it will be automatically updated with the new software. Similarly, content can also be pushed to users. For example, each time a synchronization is performed, users of OmniSky's forthcoming location-based services will automatically receive updated information about restaurants and events in cities that they frequent.

BackWeb Foundation™ technology offers a highly scalable and secure information delivery solution, supporting techniques for targeted delivery of selected content to individual users. The technology will enable OmniSky to proactively push very large amounts of data to large numbers of users. Information and upgrades can be sent in the background without degrading the performance of users' foreground networking applications.

OmniSky plans to incorporate push capabilities using BackWeb technology into the next version of its service expected to be released late this summer.

About OmniSky
OmniSky (Nasdaq: OMNY) is a leading global provider of wireless applications and services for users of mobile devices. OmniSky's award-winning service offers mobile professionals access to up to six e-mail accounts, including corporate e-mail via Microsoft Outlook as well as POP3 e-mail, the ability to search and surf the Internet, a broad range of optimized Web content, and the ability to securely conduct e-commerce transactions. The OmniSky service is available on the Palm V and Palm Vx, Handspring Visor Platinum, Visor Prism and Visor Edge, HP Jornada 520/540 Series Pocket PCs, the Compaq iPAQ Pocket PC, and soon on the Casio E-125 and HP Pavilion Notebook PCs, and can be purchased online or in over 1,500 retail outlets across the U.S. Service coverage includes over 167 major metropolitan areas within the United States, encompassing over 172 million people. OmniSky also offers its service outside of the U.S. through U.K. and German beta programs and has plans to expand into additional international markets this year.

In 2001, OmniSky will offer its proprietary wireless applications and services, including Communications, Content Delivery, and Location-Based Services to telecommunications carriers, online service providers, hardware manufacturers, and other third parties. OmniSky willintends to enable these companies to offer differentiated wireless data solutions on any mobile device, from WAP-compliant cell phones to PDAs and laptop computers, and on the most widely available wireless networks, such as CDPD, CDMA, GSM and GPRS.

OmniSky is headquartered in San Francisco. For more information visit www.omnisky.com or call 415/764-2200.