Important Additional Information
In connection with the proposed transaction, T-Mobile US, Inc.
(T-Mobile) has filed a registration statement on Form S-4 (File No. 333-226435), which was declared effective by
the U.S. Securities and Exchange Commission (the SEC) on October 29, 2018, and which contains a joint consent solicitation statement of T-Mobile and Sprint Corporation (Sprint),
that also constitutes a prospectus of T-Mobile (the joint consent solicitation statement/prospectus), and each party will file other documents regarding the proposed transaction with the SEC.
INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE JOINT CONSENT SOLICITATION STATEMENT/PROSPECTUS AND OTHER RELEVANT DOCUMENTS FILED WITH THE SEC WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. The documents filed by T-Mobile may be obtained free of charge at T-Mobiles website, at www.t-mobile.com, or at the SECs website, at
www.sec.gov, or from T-Mobile by requesting them by mail at T-Mobile US, Inc., Investor Relations, 1 Park Avenue, 14th Floor, New York, NY 10016, or by telephone
at 212-358-3210. The documents filed by Sprint may be obtained free of charge at Sprints website, at www.sprint.com, or at the SECs website, at
www.sec.gov, or from Sprint by requesting them by mail at Sprint Corporation, Shareholder Relations, 6200 Sprint Parkway, Mailstop KSOPHF0302-3B679, Overland Park, Kansas 66251, or by telephone at 913-794-1091.
No Offer or Solicitation
This communication shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in
any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting
the requirements of Section 10 of the U.S. Securities Act of 1933, as amended.
Cautionary Statement Regarding Forward-Looking Statements
This communication contains certain forward-looking statements concerning T-Mobile, Sprint and the proposed transaction
between T-Mobile and Sprint. All statements other than statements of fact, including information concerning future results, are forward-looking statements. These forward-looking statements are generally
identified by the words anticipate, believe, estimate, expect, intend, may, could or similar expressions. Such forward-looking statements include, but are not
limited to, statements about the benefits of the proposed transaction, including anticipated future financial and operating results, synergies, accretion and growth rates, T-Mobiles, Sprints and
the combined companys plans, objectives, expectations and intentions, and the expected timing of completion of the proposed transaction. There are several factors which could cause actual plans and results to differ materially from those
expressed or implied in forward-looking statements. Such factors include, but are not limited to, the failure to obtain, or delays in obtaining, required regulatory approvals, and the risk that such approvals may result in the imposition of
conditions that could adversely affect the combined