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 company or the expected benefits of the proposed transaction, or the failure to
satisfy any of the other conditions to the proposed transaction on a timely basis or at all; the occurrence of events that may give rise to a right of one or both of the parties to terminate the business combination agreement; adverse effects on the
market price of T-Mobiles or Sprints common stock and on T-Mobiles or Sprints operating results because of a failure to
complete the proposed transaction in the anticipated timeframe or at all; inability to obtain the financing contemplated to be obtained in connection with the proposed transaction on the expected terms or timing or at all; the ability of T-Mobile, Sprint and the combined company to make payments on debt or to repay existing or future indebtedness when due or to comply with the covenants contained therein; adverse changes in the ratings of T-Mobiles or Sprints debt securities or adverse conditions in the credit markets; negative effects of the announcement, pendency or