T-Mobile is Back as an Official Partner of Major League Baseball

Un-carrier customers get big league benefits including a full, free
season of MLB.TV Premium, a $109.99 value

And T-Mobile is now the official title sponsor of the T-Mobile Home
Run Derby and new T-Mobile Junior Home Run Derby

BELLEVUE, Wash.–(BUSINESS WIRE)–T-Mobile [NASDAQ: TMUS] and Major League Baseball (MLB) today announced
three more years of sweet fan perks and big league moments with the
return of the Un-carrier as an official sponsor of MLB. To celebrate the
expanded partnership, the Un-carrier is going big and giving customers a
full, free year’s subscription to MLB.TV Premium—America’s No. 1 live
streaming sports service. And, this year, T-Mobile will be the title
sponsor of both the T-Mobile Home Run Derby during All-Star Week and the
T-Mobile Junior Home Run Derby, a new youth competition for boys and
girls.

“For the last three years MLB has been with us every step of the way as
we have re-written the rules of wireless. This year we’re doubling down
– and expanding the relationship even further to include the Home Run
Derbies and free MLB.TV for customers,” said John Legere, president and
CEO of T-Mobile. “This isn’t just some corporate sponsorship. It’s the
combined effort of two passionate teams bringing even more amazing perks
and game-changing moves to baseball fans over the next three years!”

T-Mobile Simple Choice customers on qualifying plans can sign up during
Opening Week, April 3-10, to get a full, free year’s subscription to
MLB.TV Premium – a $109.99 value – and watch every out-of-market
regular season game live on their T-Mobile devices. With 2,430 games in
the regular season, that’s over 7,000 hours of streaming baseball you
can Binge
On – on America’s fastest 4G LTE network – without burning up any of
your high-speed data. For the 2016 season, MLB.TV Premium also comes
with a free subscription to At Bat Premium, the No.1 selling sports app
in the Apple App Store (a $19.99 value), together with great features,
including your choice of home or away broadcasts, multi-game viewing and
more.

“T-Mobile is a great partner that brings an exceptional level of
commitment and imagination to MLB,” said Bob Bowman, MLB President,
Business and Media. “We are thrilled to deepen our productive
relationship with T-Mobile, and with the offer to provide free MLB.TV to
T-Mobile customers, I’m certain baseball fans share our sentiment.”

T-Mobile will also be title sponsor of the Home Run Derby during
All-Star Week and the Junior Home Run Derby, a new nationwide
competition for boys and girls across the U.S. Working in partnership
with youth organizations like Boys & Girls Clubs of America and other
national baseball and softball organizations, the T-Mobile Junior Home
Run Derby will include local home run competitions in age divisions 12 &
under and 14 & under, across the nation for the first time this season.
Regional winners will advance to compete in a final home run competition
during 2016 All-Star Week in San Diego. With its involvement in the
T-Mobile Junior Home Run Derby, T-Mobile is also a sponsor of PLAY BALL,
MLB’s program to encourage widespread participation in both formal and
informal baseball activities especially focused on youth.

In the past year alone, the Un-carrier has more than doubled the
footprint of its LTE network, rolled out T-Mobile Wideband LTE to over
268 markets and T-Mobile Extended Range LTE – which carries 2x farther
from the tower and 4x deeper into buildings − in 300 markets nationwide.
With America’s fastest 4G LTE Network, T-Mobile’s got just about every
baseball fan covered from Yankee Stadium to Dodger Stadium and
everywhere in between. Fans can take in every baseball moment,
everywhere they live, work and play, all season long on the network that
does data better.

For more about the MLB.TV Premium offer and T-Mobile’s renewed
partnership with Major League Baseball, visit www.t-mobile.com/mlb.

Limited time offers; subject to change. Compatible device required. Must
be connected to T-Mobile’s network to sign up for MLB.TV. At Bat Premium
App available at Google Play or Apple App Store. Binge On:
Detectable video typically streams at DVD quality (480p or better) with
Binge On. You may disable Binge On at any time, but will lose Binge On
benefits.

About T-Mobile

As America’s Un-carrier, T-Mobile US, Inc. (NASDAQ: TMUS) is redefining
the way consumers and businesses buy wireless services through leading
product and service innovation. The Company’s advanced nationwide 4G LTE
network delivers outstanding wireless experiences to more than 63
million customers who are unwilling to compromise on quality and value.
Based in Bellevue, Washington, T-Mobile US provides services through its
subsidiaries and operates its flagship brands, T-Mobile and MetroPCS.
For more information, please visit http://www.t-mobile.com.

About Major League Baseball

Major League Baseball (MLB) is the most historic professional sports
league in the United States and consists of 30 member clubs in the U.S.
and Canada, representing the highest level of professional baseball.
Major League Baseball is the best-attended sport in North America, and
since 2004, MLB has enjoyed its best-attended seasons in the history of
the game, with each regular season eclipsing the 73 million mark. Now
led by Commissioner Robert D. Manfred, Jr., MLB currently features
record levels of labor peace, competitive balance and industry revenues,
as well as the most comprehensive drug-testing program in American
professional sports. MLB remains committed to making an impact in the
communities of the U.S., Canada and throughout the world, perpetuating
the sport’s larger role in society and permeating every facet of
baseball’s business, marketing and community relations endeavors. With
the continued success of MLB Advanced Media and MLB Network, MLB
continues to find innovative ways for its fans to enjoy America’s
National Pastime and a truly global game. For more information on Major
League Baseball, visit www.MLB.com.

Contacts

T-Mobile Media Contacts
T-Mobile US Media Relations
MediaRelations@T-Mobile.com
or
T-Mobile
Investor Relations
877-281-TMUS OR 212-358-3210
investor.relations@t-mobile.com
or
Major
League Baseball
Matt Bourne, 212-931-7882
matt.bourne@mlb.com
or
MLB
Advanced Media
Matt Gould, 212-485-8959
matthew.gould@mlb.com