[Reuters] AT&T offers T-Mobile users up to $450 credit to switch - 01/03/14 03:31 PM
NEW YORK (Reuters) - AT&T Inc on Friday offered customers of No.4 U.S. mobile provider T-Mobile U.S. Inc 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.