T-Mobile, the country's No. 3 wireless carrier, will pay $48 million for not clearly telling customers how "unlimited" data plans weren't really, well, unlimited.
The Federal Communications Commission said Wednesday that T-Mobile had a policy to slow down the speeds of customers who were the heaviest data users. But the company didn't let customers know how much data used would trigger the lower speed.
The FCC says T-Mobile started doing a better job with disclosures in June 2015.