I'm a member of a gym american drugstore makeup online T-Mobile US Inc. is still the No. 4 U.S. carrier, even with the gain of 8.9 million customers through its April 30 merger with MetroPCS. The combined company had 44 million customers at the end of the second quarter. The T-Mobile side of the company gained 1.1 million customers, including the 688,000 contract customers. The remaining gains were wholesale customers, such as alarm systems and cellular services under third-party brands. Excluding MetroPCS, T-Mobile did lose a net 10,000 contract-free, prepaid customers, but the company attributed that to customers switching to the more lucrative contract plans.