T-Mobile US Inc. continued to add customers in the third quarter and told investors the cost-cutting plan it launched in the wake of its Sprint Corp. takeover is running ahead of schedule.
The Bellevue, Wash., company said its recent merger with rival Sprint will yield $1.2 billion of annual savings next year. That figure included more than $600 million from avoided network expenses and about $500 million from lower costs, mostly by closing legacy Sprint shops.
T-Mobile…