T-Mobile USA : Migration of MetroPCS Customers to Nationwide 4G HSPA+ and LTE Network Ahead of Schedule

T-Mobile USA : Migration of MetroPCS Customers to Nationwide 4G HSPA+ and LTE
                          Network Ahead of Schedule

 Migration of MetroPCS Customers to Nationwide 4G HSPA+ and LTE Network Ahead
                                 of Schedule

  First devices connecting to 4G HSPA+ and LTE network become available for
 MetroPCS customers, offering a consistently outstanding wireless experience

BELLEVUE, Wash. - June 14, 2013 - Just six weeks after completing the
combination of T-Mobile USA and MetroPCS, T-Mobile US, Inc. (NYSE: TMUS) today
announced the migration of MetroPCS customers onto its 4G HSPA+ and LTE
network is ahead of planned schedule. This migration will provide customers of
both brands deeper LTE deployment and faster network performance - delivering
on the benefits of the combined company.

"The moment that NYSE bell rang on May 1, we put it into high gear and hit the
gas," said John Legere, president and chief executive officer of T-Mobile US,
Inc. "We've already begun moving MetroPCS customers to our blazing-fast
network. The best part is as they upgrade their phones, their wireless
experience immediately gets better."

The company is making HSPA+ and LTE compatible devices available to MetroPCS
customers as well as allowing them to bring their own unlocked compatible
HSPA+ or LTE phone, providing them the opportunity to upgrade to a powerful 4G
network. With approximately 60 percent of MetroPCS customers upgrading their
phones every year, it is expected that migration of customers will continue at
a rapid pace. The company expects full customer migration to be complete by
the end of 2015.

MetroPCS customers in Boston, Las Vegas and Hartford, Conn. can now purchase
two new HSPA+ Android(TM)-powered cutting-edge smartphones running on a
nationwide 4G network, the LG Optimus L9^TM and Samsung Galaxy Exhibit^TM. On
June 17, MetroPCS will also make available a refreshed version of the Samsung
Galaxy S® III, which will take advantage of 4G LTE in addition to a nationwide
4G HSPA+ network^1.

Additionally, MetroPCS launched a "Bring Your Own Phone" program in these
markets, as well as Dallas, giving customers the option to bring their own
compatible unlocked phone to gain access to the 4G HSPA+ and LTE network.

Migrating MetroPCS customers will also benefit customers of T-Mobile. As
customers leave the MetroPCS network, the freed up spectrum can then be added
to the company's growing 4G LTE network. Deploying the company's spectrum on a
single network provides a path to double its initial super-fast 4G LTE
deployment (to 20+20 MHz of 4G LTE) in approximately 90 percent of the top 25
metro areas planned for 2014 and beyond.

Indeed, just two weeks after becoming one company, T-Mobile leveraged the
compatibility of existing MetroPCS 4G LTE handsets and enabled them to connect
to its 4G LTE network in Las Vegas. This allowed the company to combine
MetroPCS' 4G LTE spectrum with T-Mobile's spectrum, doubling the LTE spectrum
deployment in Las Vegas and dramatically increasing data speeds for both
T-Mobile and MetroPCS customers with capable devices. As the company's 4G LTE
network expands to more cities, T-Mobile will continue to migrate MetroPCS
customers with 4G LTE-capable handsets and leverage MetroPCS' spectrum to
deepen the combined company's LTE coverage.

Independent third party tests of the company's 4G LTE in Las Vegas conducted
before and after the addition of MetroPCS spectrum show that its 4G LTE has
the fastest average download speeds in the city, with an increase of nearly 50
percent.

^1 Coverage not available everywhere. Broad LTE coverage planned for 2013.
Capable device and qualifying service required for 4G HSPA+ and LTE. LTE is a
trademark of ETSI.



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 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
operates its flagship brands, T-Mobile and MetroPCS. It currently serves
approximately 43 million wireless subscribers and provides products and
services through 70,000 points of distribution. For more information, please
visit: http://www.t-mobile.com.

Contacts:
Media Relations
425-378-4002
mediarelations@t-mobile.com

Investor Relations
212-424-2959
investor.relations@telekom.com

Forward-Looking Statements
This press release includes "forward-looking statements" within the meaning of
the U.S. federal securities laws. Any statements made herein that are not
statements of historical fact, including statements about T-Mobile US, Inc.'s
expected network modernization and other advancements, expected migration of
MetroPCS customers, expected product offerings, and projected synergies, are
forward-looking statements. Generally, forward-looking statements may be
identified by words such as "anticipate," "expect," "suggests," "plan,"
"believe," "intend," "estimates," "targets," "views," "may," "will,"
"forecast," and other similar expressions. The forward-looking statements
speak only as of the date made, are based on current assumptions and
expectations, and involve a number of risks and uncertainties. Important
factors that could affect future results and cause those results to differ
materially from those expressed in the forward-looking statements include,
among others, the following: our ability to compete in the highly competitive
U.S. wireless telecommunications industry; adverse conditions in the U.S. and
international economies and markets; our ability to successfully integrate the
MetroPCS and T-Mobile businesses and realize expected synergies and other
benefits from the recent combination; our significant capital commitments and
the capital expenditures required to effect our business plan; our ability to
adapt to future changes in technology, enhance existing offerings, and
introduce new offerings to address customers' changing demands; changes in
legal and regulatory requirements, including any change or increase in
restrictions on our ability to operate our network; our ability to
successfully maintain and improve our network, and the possibility of
incurring additional costs in doing so; major equipment failures; severe
weather conditions or other force majeure events; disruptions of our key
supply relationships; and other risks described in our filings with the
Securities and Exchange Commission, including those described in our Current
Report on Form 8-K filed with the Securities and Exchange Commission on May 8,
2013. You should not place undue reliance on these forward-looking statements.
We do not undertake to update forward-looking statements, whether as a result
of new information, future events or otherwise, except as required by law.

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