Sprint Nextel is dropping the Nextel part of its name as it completes a deal with Tokyo-based SoftBank that gives the Japanese company majority ownership of the third-largest U.S. wireless carrier.

The company will retain its ticker symbol "S" on the New York Stock Exchange and go by the simplified name Sprint Corp. SoftBank is spending $21.6 billion, including a cash infusion of $5 billion, to acquire control of the carrier.

The name change turns the page on an ugly chapter for the U.S. company, which spent $36 billion on Nextel Communications only to write off most of the purchase price after struggling to integrate the two companies' networks. For billionaire SoftBank founder Masa­yoshi Son, the acquisition will help fulfill his ambition of making the company the world's biggest mobile phone operator.

"This spurs expectations for further growth, even though there's some risk," said Tomoaki Kawasaki, an analyst at Iwai Cosmo Holdings Inc. in Tokyo. "Son also wants to earn from content on the Internet in the U.S."

Sprint CEO Dan Hesse will remain at the helm of the newly minted company. Son, 55, will serve as chairman, while SoftBank board member Ronald Fisher will be vice chairman. Sprint shut down the Nextel system this year.

SoftBank, the third-largest Japanese carrier, won a bidding war with Dish Network Corp. for Sprint when it raised its takeover bid.