Now FaceTime over Cellular on AT&T will be available to all iOS device owners, including those with unlimited data, by next month.
Today AT&T announced an update to its pre-loaded video chat app policy (emphasis added):
For video chat apps that come pre-loaded on devices, we currently give all OS and device makers the ability for those apps to work over cellular for our customers who are on Mobile Share or Tiered plans. Apple, Samsung and BlackBerry have chosen to enable this for their pre-loaded video chat apps. And by mid-June, we’ll have enabled those apps over cellular for our unlimited plan customers who have LTE devices from those three manufacturers.
Throughout the second half of this year, we plan to enable pre-loaded video chat apps over cellular for all our customers, regardless of data plan or device; that work is expected to be complete by year end.
Today, all of our customers can use any mobile video chat app that they download from the Internet, such as Skype.
Many LTE Apple device owners with unlimited data have already reported that the feature is usable, so it’s worth checking to see. FaceTime over Cellular can be enabled by opening the Settings app and navigating to FaceTime > Use Cellular Data.