Filed by DISH Network Corporation

pursuant to Rule 425 under the Securities Act of 1933

and deemed filed pursuant to Rule 14a-12

under the Securities Exchange Act of 1934

Subject Company: Sprint Nextel Corporation

Commission File No.: 001-04721

Statement by DISH DBS Corporation in Connection with the Marketing of its Notes on May 14, 2013, included on DISH Network Corporation’s Current Report on Form 8-K dated May 14, 2013

In connection with the marketing of the notes by DISH DBS, DISH DBS made the following statement:  “DISH Network has had multiple meetings and communications with the advisors to the Special Committee of the Board of Directors of Sprint, as well as with senior members of Sprint’s management team.  DISH Network has provided information and documentation in response to all of their questions and is unaware of any items that remain outstanding.”

Press Release, “DISH Network Announces Debt Offering,” dated May 14, 2013

DISH Network Announces Debt Offering

ENGLEWOOD, Colo.—(BUSINESS WIRE)— May 14, 2013—DISH Network Corporation (NASDAQ: DISH) (“DISH Network”) today announced that its subsidiary, DISH DBS Corporation (“DISH DBS”), plans to offer, subject to market and other conditions, approximately $2.5 billion aggregate principal amount of its senior notes. The net proceeds of the offering will be placed into escrow.  The net proceeds from the sale of the notes in this offering will be released from escrow to make a cash distribution to DISH Network to finance a portion of the cash consideration for DISH Network’s proposed merger with Sprint Nextel Corporation (“Sprint”).  If the proposed merger with Sprint does not occur on or prior to the escrow end date, or if DISH DBS elects at any time on or prior to the escrow end date, DISH DBS will redeem all of the notes.

The notes will only be offered and sold to qualified institutional buyers in accordance with Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”) and in offshore transactions in accordance with Regulation S under the Securities Act.  The notes being offered have not been and will not be registered under the Securities Act or the securities laws of any other jurisdiction.  The notes may not be offered or sold in the United States absent registration or an applicable exemption from registration requirements.  This press release does not constitute an offer to sell or a solicitation of an offer to buy any of the notes; nor shall there be any sale of these notes in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful.

Cautionary Statement Concerning Forward-Looking Statements

Certain statements contained herein may constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995.  Such forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause the actual results, performance or achievements of DISH Network Corporation to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. More information about such risks, uncertainties and other factors is set forth in DISH Network Corporation’s Disclosure Regarding Forward-Looking Statements included in its recent filings with the Securities and Exchange Commission (the “SEC”), including its annual report on Form 10-K for the year ended December 31, 2012 and any subsequent quarterly reports on Form 10-Q.  Risks and uncertainties relating to the proposed transaction include, without limitation, the risks that: Sprint Nextel Corporation will not enter into any definitive agreement with DISH Network Corporation or the terms of any definitive agreement will be materially different from those described above; the parties will not obtain the requisite financing or regulatory approvals for the proposed transaction; the proposed transaction will not be consummated for any other reason; management’s attention will be diverted from ongoing business operations; and the anticipated benefits of the transaction will not be realized.  The forward-looking statements speak only as of the date made, and DISH Network Corporation expressly disclaims any obligation to update these forward-looking statements.

Additional Information About the Proposed Transaction and Where to Find It

This communication relates to a business combination transaction with Sprint Nextel Corporation proposed by DISH Network Corporation, which may become the subject of a registration statement filed with the SEC. This communication is not a substitute for the joint proxy statement/prospectus that DISH Network Corporation and Sprint Nextel Corporation would file with the SEC if any agreement is reached or any other documents that

DISH Network Corporation or Sprint Nextel Corporation may send to shareholders in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE JOINT PROXY STATEMENT/PROSPECTUS AND ALL OTHER RELEVANT DOCUMENTS IF, AND WHEN, THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION. All such documents, if filed, would be available free of charge at the SEC’s website (http://www.sec.gov).  In addition, investors and security holders may obtain free copies of such documents filed by DISH Network Corporation with the SEC by directing a request to: DISH Network Corporation, 9601 S. Meridian Boulevard, Englewood, Colorado 80112, Attention: Investor Relations.  This communication shall not constitute an offer to buy or solicitation of an offer to sell 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.

Participants

DISH Network Corporation and its directors and executive officers may be deemed, under the rules of the SEC, to be participants in any solicitation of shareholders of DISH Network Corporation or Sprint Nextel Corporation in connection with the proposed transaction. Investors and security holders may obtain information regarding the names, affiliations and interests of the directors and executive officers of DISH Network Corporation in its annual report on Form 10-K for the year ended December 31, 2012, which was filed with the SEC on February 20, 2013, and its proxy statement for the 2013 annual meeting of shareholders, which was filed with the SEC on March 22, 2013. These documents can be obtained free of charge at the SEC’s website (http://www.sec.gov) and from Investor Relations at DISH Network Corporation at the address set forth above. Additional information regarding the interests of these participants will also be included in any proxy statement/prospectus and other relevant documents to be filed with the SEC in connection with the proposed transaction when they become available.