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T-Mobile and MetroPCS Continue to Expand Consumer Choice, Will Offer New 8.1 on ’s Upcoming Lumia 635

BELLEVUE, Wash. – April 2, 2014 – Immediately on the heels of ’s .1 unveiling today, T-Mobile US, Inc. (NYSE: TMUS) has announced the company will offer up its Redmond neighbor’s latest mobile OS as part of its ongoing commitment to deliver greater freedom and choice for American wireless consumers – starting with Nokia’s new Lumia 635 coming this summer.

The Lumia 635 will be the first device sold in the powered out of the box by the very latest Windows Phone 8.1 , introduced earlier today at Microsoft’s 2014 Build developers conference in San Francisco.

T-Mobile US today also announced that, come summer, T-Mobile and MetroPCS will be the best places to get the very first with the new Windows Phone OS for a low upfront cost and with zero service contract, zero overages (while on its wicked-fast network), zero hidden device costs, and zero upgrade wait. And only T-Mobile and MetroPCS customers can experience the next-gen Lumia 635 on America’s fastest nationwide 4G LTE network.

“The Un-carrier’s all about removing crazy restrictions and delivering total wireless freedom and flexibility,” said Jason Young, senior vice president of Marketing at T-Mobile. “With Windows Phone, we can offer customers another great choice in mobile platforms. And we’re excited to bring to both T- Mobile and MetroPCS customers the combination of next-gen , great features and fresh design that Nokia’s latest Windows Phone has to offer.”

The Lumia 635 will build on all the qualities and benefits that made its predecessor – the Lumia 521 – so popular among American wireless customers. According to T-Mobile US, first-time smartphone buyers were particularly drawn to the Lumia 521 for its extraordinary ease-of-use and its budget-friendly price point, making it the best-selling Windows Phone device ever for T-Mobile.

“With all the advanced features the Lumia 635 has to offer – like its quad core processor, beautiful 4.5 inch screen and most advanced Windows Phone OS – we fully expect Nokia’s latest smartphone to do as well or better than its predecessor,” Young added.

The company said the Nokia Lumia 635 will deliver:

 An uncompromised Windows Phone 8.1 experience with fast quad core processor, bright colorful design with changeable shells and 4.5” ClearBlack screen.  -fast 4G LTE makes it quicker and easier to connect with the and things you love online.  The same apps and experiences as high end Lumia’s including free Global maps and navigation, free Nokia MixRadio streaming, and Nokia Camera.

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 Live Tiles for instant information from apps, one easy swipe to important notifications with Action Centre, , OneDrive, and faster ways to connect with Word Flow and Whatsapp and Instagram  A more personal and proactive assistant with

In addition, T-Mobile US announced that, starting this summer, the Windows Phone 8.1 update will also be available for T-Mobile’s Nokia Lumia 521 and owners, as well as for MetroPCS customers who own the Nokia Lumia 521.

Further information, including specific device availability and pricing will be shared as those details are available.

For more information on the new Nokia Lumia 635 at T-Mobile, visit http://www.t-mobile.com/cell- phones/windows-phones/nokia-lumia-635.

About T-Mobile US, Inc.: As America's Un-carrier, T-Mobile US, Inc. (NYSE: "TMUS") is redefining the way consumers and businesses buy wireless services through leading product and service innovation. The company's advanced nationwide 4G and expanding 4G LTE network delivers outstanding wireless experiences for customers who are unwilling to compromise on quality and value. Based in Bellevue, Wash., T-Mobile US provides services through its subsidiaries and operates its flagship brands, T-Mobile and MetroPCS. It currently serves approximately 46.7 million wireless subscribers and provides products and services through 70,000 points of distribution. For more information, please visit http://www.t-mobile.com.

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Media Contacts T-Mobile US Media Relations [email protected]

Investor Relations 877-281-TMUS OR 212-358-3210 [email protected]

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