Looks like At&t kept their promise. Customers are reporting that FaceTime is up and running over a cellular connection, no WiFi needed. The majority of users with early access are either iPhone 5 users or have a grandfathered Unlimited data plan. Full rollout could take us to Q1 of 2013.
BGR has confirmed on two iPhone 5 handsets tied to unlimited data plans that FaceTime has indeed been enabled. After rebooting the iPhones Wednesday morning, Use Cellular Data for FaceTime was activated and a test call connected successfully over AT&T’s LTE network. BGR has also learned that some iPhone 4S handsets have FaceTime over cellular enabled despite not being compatible with AT&T’s LTE network.
To check if FaceTime over cellular was activated on your handset, reboot and then browse to Settings > General > Cellular. Scroll down to see if the FaceTime toggle is now on — if it is, FaceTime will now work over cellular data connections.
As for what happens to subscribers who switched off of unlimited data plans or other less expensive options in order to have access to FaceTime over cellular networks, it remains unclear if the carrier will allow users to switch back.
