T-Mobile Chief Executive Officer John Legere believed there's no stopping his company from toppling Sprint as the third largest wireless carrier in the United States at the end of the year, the T-Mobile boss said in a recent interview with CNET.com executive editor Roger Cheng.

Legere, the man instrumental for T-Mobile's rise as a powerhouse in the industry, is very much optimistic of achieving company's goal, as sales and demand continue to skyrocket this year.

Backed by their announcement of setting the highest record gross in company's history (2.7 million customers) last August, T-Mobile is expected to gain more with the latest of the Uncarrier Program (Uncarrier 7.0) taking a shot in the arm from the company's partnership with Apple.

"For T-Mobile's next "Uncarrier" act, the company is broadening its Wi-Fi calling and text message feature, thanks in part to Apple's decision to include the feature in the latest iPhone," CNET.com reported.

On the other hand, rival carrier Sprint is suddenly showing signs of life since the arrival of new CEO Marcelo Claure, who launched aggressive offers like their iPhone specific plan that cuts the cost of their cheapest rate by $10.

Legere lauded Sprint top-honcho for coming up with genius move to stop the bleeding of the company that struggled mightily in the previous months. However, he thinks it won't be enough to stop a running locomotive like T-Mobile from surpassing them.

"It's a totally different situation," Legere said of Sprint's recent growth. "They're trying to get to the point where they want to stop the bleeding. They have a long way to go before their network is competitive."

"When your network isn't up to par, you have to compete on price," he said. "If you could, you would do that later. If customers come in because of price and the network's not right, they're going to leave."

Sprint and T-Mobile were on the verge of a merger with Sprint parent company SoftBank purchasing T-Mobile mother Deutsche Telekom, but the deal was unfortunately blocked by regulators.