AT&T will enable FaceTime over Cellular at no extra charge for iOS 6 customers with an LTE device on any tiered data plan.
AT&T will also continue to offer FaceTime over Cellular to customers with any AT&T Mobile Share plan, as well as FaceTime over Wi-Fi, which has always been available for all customers. AT&T expects to roll out this functionality to customers over the next eight to ten weeks.
http://www.att.com
