T-Mobile Honored as One of the “World’s Most Ethical Companies”

March 20, 2014

Sixth Consecutive Year Recognized For Ethical Leadership Across 41 Industries and 5 Continents

BELLEVUE, Wash. - March 21, 2014 - T-Mobile US, Inc., (NYSE: TMUS) today announced that it has been recognized by the Ethisphere Institute, an independent center of research promoting best practices in corporate ethics and governance, as a 2014 World's Most Ethical Company®.

As America's Un-carrier, T-Mobile has shaken up the wireless industry over the last year, freeing customers from onerous contracts, packing in more services, and unleashing more ways to use our service. While we continue to upset the apple carts of the old phone companies and change the rules of the industry, we will never compromise on doing things with integrity and a commitment to operating our business in the highest ethical manner.

“This recognition is a reflection of our employees’ constant attention to doing things the right way,” said John Legere, President and CEO of T-Mobile. “Americans are tired of the complexities and restrictions that the old-guard phone companies have foisted on everyone, and we’re moving fast to rip that all down, but ethics will always be the foundation of everything we do for our customers, our vendor partners, and our shareholders."

This is the sixth consecutive year that T-Mobile has been honored with this award, which recognizes organizations that continue to raise the bar on ethical leadership and corporate behavior. T-Mobile is the only United States-based company in the telecommunications services industry honored this year, and each of the last six years.

"The entire community of World's Most Ethical Companies believe that customers, employees, investors and regulators place a high premium on trust and that ethics and good governance are key in earning it," said Ethisphere's Chief Executive Officer, Timothy Erblich. "T-Mobile joins an exclusive community committed to driving performance through leading business practices. We congratulate everyone at T-Mobile for this extraordinary achievement."

The World's Most Ethical Company assessment is based upon the Ethisphere Institute's Ethics Quotient(TM) framework. The Ethics Quotient framework has been developed over years of effort to provide a means to assess an organization's performance in an objective, consistent and standardized way. The information collected provides a comprehensive sampling of definitive criteria of core competencies, rather than all aspects of corporate governance, risk, sustainability, compliance and ethics. The Ethics Quotient framework and methodology was determined, vetted and refined by the expert advice and insights gleaned from Ethisphere's network of thought leaders and from the World's Most Ethical Company Methodology Advisory Panel.

Scores are generated in five key categories: ethics and compliance program (25%), reputation, leadership and innovation (20%), governance (10%), corporate citizenship and responsibility (25%) and culture of ethics (20%).

The full list of the 2014 World's Most Ethical Companies can be found at http://ethisphere.com/worlds-most-ethical/wme-honorees/.

About T-Mobile USA, 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 https://www.t-mobile.com.

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T-Mobile Contact:

T-Mobile USA Media Relations