T-Mobile Adds 1 Million Customers in Escalating Mobile Fight

T-Mobile US Inc. posted better-than-expected subscriber growth in the third quarter, but the shares fell as investors focused on the increasing competition for new customers among the top wireless companies.

T-Mobile, the No. 2 US carrier, added 1 million new mobile phone subscribers in the three months ended Sept. 30, the company said in a statement on Thursday, easily beating the 852,000 additions that analysts had expected. Revenue, however, came in fractionally below estimates.