AT&T recently raised activation fees for customers who buy phones on contract, and T-Mobile's CEO John Legere took the chance to call them out on Twitter.

While T-Mobile removed activation fees, AT&T increases them. But, of course, this is part of AT&T's plan. “Customers looking for a great value can get it with AT&T Next and Mobile Share Value plans,” AT&T says. “With AT&T Next, customers can get a new device every year for $0 down, plus no activation, financing or upgrade fees. Customers choosing a 2-year contract plan will experience a four-dollar activation fee increase beginning June 8. Customers on 2-year plans choosing to upgrade to a new device will experience a four-dollar upgrade fee increase beginning June 8.”

[via BGR]