T-Mobile Says Customer Growth Recovered After Data Hack

T-Mobile US Inc.’s third-quarter profit slipped as higher costs and a lull in new customer additions following a headline-grabbing hack sapped its bottom line.

The company said it added 673,000 phone subscribers in the closely watched market for postpaid wireless service during the September-ended quarter. The tally lagged behind AT&T Inc., which reported a net gain of 928,000 such subscribers, over the same span.