T-Mobile Agrees to Sell $500,000,000 5.250% Senior Notes Due 2018

T-Mobile US, Inc.

(the “Company”) announced today that T-Mobile USA, Inc. (“T-Mobile USA”), a wholly-owned subsidiary, has agreed to sell $500,000,000 aggregate principal amount of its 5.250% Senior Notes due 2018 (the “Notes”) in a private offering. The offering is scheduled to close on August 21, 2013, subject to satisfaction of customary closing conditions. T-Mobile USA intends to use the net proceeds from this private offering for general corporate purposes. The Notes were offered only to qualified institutional buyers in reliance on Rule 144A and in offshore transactions pursuant to Regulation S under the Securities Act of 1933, as amended (the “Securities Act”). The Notes have not been registered under the Securities Act or any state securities laws and may not be offered or sold in the United States except under an effective registration statement or an applicable exemption from registration requirements or in a transaction not subject to the registration requirements of the Securities Act or any state securities laws. This release shall not constitute an offer to sell or the solicitation of an offer to buy any of these securities, nor shall it constitute an offer, solicitation or sale in any jurisdiction in which such offer, solicitation or sale is unlawful. About T-Mobile US, Inc.: As America's Un-carrier, T-Mobile US, Inc.

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 44 million wireless subscribers and provides products and services through 70,000 points of distribution. For more information, please visit http://www.t-mobile.com.