Sprint Uses Core Mobility to Help Power PCS Ready Link

Market Wire, November, 2003

Sprint (NYSE: PCS) (NYSE: FON) which operates the largest all-digital, all-PCS nationwide network, has announced that Core Mobility's Communication Client is one key element of its nationwide PCS Ready Link service. The new Sprint nationwide walkie-talkie-style service called PCS Ready Link that gives customers a quick, convenient way to communicate one-on-one or to groups of up to five with the simple push of a button. Ideal for short, "get in, get out" conversations, PCS Ready Link is an efficient and cost-effective way to quickly access co-workers, clients, suppliers, family and friends anywhere on the enhanced Sprint Nationwide PCS Network. The new service makes its debut on two new PCS Vision Ready Link Phones by Sanyo, including a rugged and clamshell design, complementing an already robust suite of wireless voice and data products to help increase productivity for mobile workers and individuals.

"Sprint is focused on being a leader and innovator of advanced products and services that are customer friendly, easy to use and work the same nationwide," said Oliver Valente, VP of Technology Development, Sprint. "PCS Ready Link is designed to meet the needs of customers that want a quick, cost-effective way to share information, check status and alert others. By implementing the Core Mobility Communication Client we can meet these customer needs."

Ready Link uses Core's standards-based Communication Client as the basis for the handset implementation. With numerous optimizations for buffering, data compression, and latency, the Communication Client delivers great user experience over Sprint's nationwide CDMA 1XRTT network. By supporting a SIP (Session Initiation Protocol) standard-compliant network, the Communication Client guarantees that Ready Link is open and extensible, enabling Sprint to add compelling new features quickly.

Konstantin Othmer, CEO and founder of Core Mobility, says, "By working closely with Sprint and other vendors, we have been able to make Ready Link a great product. The Communication Client enables an open, standards-compliant interface while shaving seconds off start-up time and in-call delays. We are proud of our role helping Sprint deliver a markedly better user experience than competitive solutions."

Core Mobility

Core Mobility delivers enhanced communication solutions, including innovative voice services and unparalleled service management products to wireless carriers. By focusing on optimizing end-to-end service quality, including user experience and network performance, Core Mobility creates compelling products that enhance revenue generation of wireless networks and services. Headquartered in Palo Alto, CA, Core Mobility is privately funded and can be found at www.coremobility.com.

Contacts: Nancy Sherrer, Sprint 913-794-2942 nsherr02@sprintspectrum.com Suzanne Lammers, Sprint 913-794-2946 slamme01@sprintspectrum.com Steve Roskowski, Core Mobility 650-566-6643 rosko@coremobility.com