T-Mobile US, Inc. (NYSE:TMUS) (“T-Mobile”) announced today that T-Mobile USA, Inc. (“T-Mobile USA”), a wholly-owned subsidiary, has agreed to sell $1,000,000,000 aggregate principal amount of 6.125% Senior Notes due 2022 and $1,000,000,000 aggregate principal amount of 6.500% Senior Notes due 2024 in a registered public offering. The notes offering is scheduled to close on November 21, 2013, subject to satisfaction of customary closing conditions. T-Mobile expects to use the net proceeds from this offering for general corporate purposes, including capital investments, enhancing its financial flexibility and opportunistically acquiring additional spectrum in private party transactions and/or government auctions. J.P. Morgan Securities LLC, Credit Suisse Securities (USA) LLC, Deutsche Bank Securities Inc., Citigroup Global Markets Inc., Goldman, Sachs & Co., RBC Capital Markets, LLC and RBS Securities Inc. are the joint book-running managers for the notes offering. The issuer has filed a registration statement (including a prospectus) with the Securities and Exchange Commission (“SEC”) for the notes offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and the related prospectus supplement and other documents the issuer will file with the SEC for more complete information about the issuer and the notes offering. You may get these documents for free by visiting EDGAR on the SEC Web site at http://www.sec.gov . Alternatively, the issuer, any underwriter or any dealer participating in the notes offering will arrange to send you the prospectus and related prospectus supplement if you request it by contacting: J.P. Morgan Securities LLC, 383 Madison Avenue, 3rd Floor, New York, NY 10179, Attention: Syndicate Desk, telephone: 800-245-8812; Credit Suisse Securities (USA) LLC, Attention: Max McClusky, Eleven Madison Avenue, New York, NY 10010, email: firstname.lastname@example.org ; Deutsche Bank Securities Inc., Attention: Prospectus Group, 60 Wall Street, New York, New York 10005-2836, by telephone at +1 (800) 503-4611 or by email at email@example.com ; Citigroup Global Markets Inc., c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York 11717, Attn: Prospectus Department, Telephone: 1-800-831-9146, Email: firstname.lastname@example.org ; Goldman, Sachs & Co., Prospectus Department, 200 West Street, New York, NY 10282, telephone: 1-866-471-2526, facsimile: 212-902-9316 or by emailing email@example.com ; RBC Capital Markets, LLC, Three World Financial Center, 200 Vesey Street, 10th Floor, New York, NY 10281-8098, telephone: 877-280-1299; or RBS Securities Inc., 600 Washington Blvd., Stamford, CT 06901, Attention: High Yield Debt Capital Markets Syndicate, telephone 1-866-884-2071. Forward-Looking Statements This news 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 the expected closing of the notes offering and the intended use of the notes’ proceeds, are forward-looking statements. Generally, forward-looking statements may be identified by words such as “anticipate,” “expect,” “suggests,” “plan,” “project,” “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: market disruptions, banking moratoriums or other difficulties in executing the notes offering; 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 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; and other risks described in our filings with the Securities and Exchange Commission. 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.