MetroPCS and Jibe Mobile to Open Rich Communications Services

to All North American Wireless Subscribers

Jibe’s Global Communications Cloud Enables joyn™ by MetroPCS Subscribers to Invite Friends on Any Network in Canada, Mexico and the U.S. to Share and Experience Enriched Mobile Services

BARCELONA February 26, 2013 — MetroPCS Communications, Inc. (NYSE: PCS) and Jibe Mobile (www.jibemobile.com), the Silicon Valley cloud-based global communications provider, today announced that Jibe’s Global Communications Cloud will enable MetroPCS subscribers to connect with friends and family across any network in North America using the unified and intuitive features of Rich Communication Services (RCS).

joyn™ is a certification trade mark of the GSMA and the consumer facing-brand for Rich Communication Services. When consumers see the joyn brand they will know that the device is RCS enabled, which means it automatically ‘knows and shows’ ways to share with contacts via chat, video, call or files, at any moment in time, regardless of the network or device used.

Last year, MetroPCS became the first U.S. mobile operator to offer RCS 5.0 services on a 4G LTE network under the joyn brand and has now joined leading global operators in receiving provisional GSMA joyn accreditation.

“Our goal with joyn by MetroPCS was to give consumers a new intuitive and unified communications experience and we are excited about the potential that now exists, through Jibe, for subscribers outside the MetroPCS network to adopt and experience the full range of features and services made possible by RCS,” said Roger Linquist, CEO and Chairman, MetroPCS. “We are committed to working with operators and over-the-top providers to demonstrate the benefits of joyn, ensure that true interoperability from any device and carrier is achieved and ultimately see mass adoption of RCS services on a scale similar to SMS or text services.”

Jibe enables subscribers to invite contacts in their address books who are on any North American network to download a joyn™-compliant client onto their phone, tablet, or device and begin connecting with enriched services like Wi-Fi calling and video calling, enhanced instant messaging or chat and simplified content sharing. The downloadable client helps bridge the interoperability gap and address the fundamental challenge of mass adoption by enabling carriers that have yet to deploy RCS to offer joyn’s enriched features to their subscribers.

“MetroPCS’ adoption of Jibe Mobile is a major step forward in advancing our commitment to help bridge the worlds of traditional standards-based telecommunications and Silicon Valley-style rapid application development to let carriers and developers connect, and ultimately enhance, the experience of mobile consumer and business subscribers around the world,” said Amir Sarhangi, CEO, Jibe Mobile.

Services are expected to rollout later this year.

About MetroPCS

Dallas-based MetroPCS Communications, Inc. (NYSE: PCS) is a provider of no annual contract, unlimited wireless communications service for a flat rate. MetroPCS is the fifth largest facilities-based wireless carrier in the United States based on number of subscribers served. With Metro USA(SM), MetroPCS customers can use their service in areas throughout the United States covering a population of over 280 million people. As of December 31, 2012 MetroPCS had approximately 8.9 million subscribers. For more information please visit www.metropcs.com.

About Jibe Mobile

Jibe Mobile, the global communications cloud company, provides an open technology platform for the new era of telephony. Bridging the worlds of traditional standards-based telecommunications and Silicon Valley-style rapid application development, Jibe is empowering phone companies, developers, and consumers everywhere to build the world’s next global phone network. The Silicon Valley cloud-based communications provider, Jibe has developed the world’s first open technology platform leveraging the most advanced telecom industry standards — including GSMA joyn™ and RCS 5 — and open APIs enabling developers to rapidly incorporate real-time, ‘rich communications’ into mobile applications. Jibe Mobile is headquartered in Mountain View with offices in London, Düsseldorf and Tokyo. www.jibemobile.com