SAN FRANCISCO — T-Mobile US, the fourth-largest US cellphone carrier, lost thousands of customers over the past few years to rivals that offered cooler phones. But it appears to be getting its groove back.
The company Thursday said it had gained 1.1 million customers, including 685,000 contract subscribers, over its second quarter. That compares with losing 557,000 contract subscribers, the most valuable type of customer, in the same period a year ago. The uptick represents its largest customer growth in four years.