People walk past a Sprint store in New York in this December 17, 2012, file photo. Sprint Nextel Corp said on May 21, 2013, it raised its buyout offer for wireless service provider Clearwire Corp 14 ... more 

People walk past a Sprint store in New York in this December 17, 2012, file photo. Sprint Nextel Corp said on May 21, 2013, it raised its buyout offer for wireless service provider Clearwire Corp 14 percent to $3.40 per share, just hours before shareholders were set to vote on the company's original offer. REUTERS/Andrew Kelly/Files (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) less