AT&T on Friday offered customers of No. 4 US mobile provider T-Mobile a $200 credit to switch to its service on top of a phone trade-in that could be worth another $250, amping up competition between the two rivals.
AT&T, the No. 2 mobile provider, announced the promotion after T-Mobile spent months appealing to AT&T customers and in anticipation of a new competitive offer expected from the smaller company next week.