Shares of T-Mobile (TMUS) - Get Report were halted in after-hours trading for about 30 minutes on Wednesday after the wireless company reported earnings of 67 cents per share, easily topping analysts' expected second quarter financial results of 38 cents per share.

CEO John Legere touted the carrier's second quarter results, while ripping rivals AT&T Inc. (T) - Get Report , Verizon Communications Inc. (VZ) - Get Report  and Sprint Corp. (S) - Get Report .

T-Mobile gained 3.2% to $63.95 after hours. The stock was halted at the close but resumed trading at 4:35 PM EST. 

For the quarter T-Mobile reported revenue of $10.2 billion, topping Wall Street expectations of $9.8 billion, according to FactSet. 

T-Mobile added 1.3 million total net subscribers, its 17th consecutive quarter of adding more than one million customers. The carrier also gained 786,000 in net branded postpaid phone subscriptions, topping forecasts of 596,000.

The company plans to open 1,500 T-Mobile stores and 1,500 MetroPCS stores this year. "We could be the fastest growing retailer in America," Legere said.

Legere has a no-holds barred policy regarding T-Mobile's competitors on earnings calls, as TheStreet noted earlier.

"AT&T is focused on big time M&A and fine with losing a couple hundred thousand post paid subscribers this quarter and every quarter," said Legere on Tuesday, while also critiquing Verizon's marketing of its new unlimited plans. He noted that the two largest wireless carriers have seen their network performance drop as they offered service. "Both Verizon and AT&T are completely choking," he said.

"Sprint has been giving away phone service for free, like literally giving it away," he said, in reference to Sprint's offer to subscribers of other carriers.

Legere said he would give cable "a hall pass for now," but later called Comcast Corp.'s (CMCSA) - Get Report wireless resale agreement with Verizon "sh***y." 

Comcast launched its Xfinity Mobile wireless offering in the second quarter, reselling Verizon's service. Comcast and Charter Communications Inc. (CHTR) - Get Report also held talks with Sprint about reviving a dormant resale agreement, spurring speculation that the carriers could take a stake in T-Mobile's potential merger partner. 

In reference to the swirling merger rumors, Legere noted the "the anonymous source fax machine to" that had generated deal speculation. 

In addition to the cable companies potentially entering wireless, Leger noted that Inc. (AMZN) - Get Report and Dish Network Corp. (DISH) - Get Report have reportedly held partnership talks.

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