Making Case for T-Mobile Deal, Sprint Says Customers Are Fleeing

Sprint Corp. has been unable to turn the corner in its core business, the company said as it told regulators its purchase by T-Mobile US Inc. would set up a stronger competitor to mobile industry leaders AT&T Inc. and Verizon Communications Inc.

Sprint, the smallest of the top four U.S. nationwide providers, offers a poor network experience that is sending customers fleeing at an increasing rate, the carrier told the Federal Communications Commission in a Sept. 21 meeting, according to a filing posted Sept. 26 on the agency’s website.

The company’s revenue is dropping, it can’t do much more cost ...