AT&T has announced that it will begin allowing FaceTime over Cellular at no additional charge for customers with an LTE device on any tiered data plan. Apple added the ability to use FaceTime over a cellular data connection in iOS 6, however AT&T originally announced that only customers on Mobile Share plans would have access to the new feature on the AT&T network, a move that sparked a complaint to the FCC. Notably, AT&T is the only…