AT&T might be expanding FaceTime to unlimited data users

Plus previously unapproved devices

iPhone 4S

Fear not, AT&T users with grandfathered unlimited data plans or an iPhone 4S: FaceTime over cellular may be knocking on your door soon, at least according to one 4S owner.

MacRumors forum user kre62 reported that both his iPhone 4S and iPhone 5 - each on an unlimited data plan - now support iOS 6's FaceTime calling.

gave FaceTime to initially.

announced on Nov. 8 that it would open up FaceTime to those on tiered plans and not just its Mobile Share plan, though the service was only extended to 4G LTE phones. That meant the new iPhone 5 and certain iPads could experience FaceTime fun, but not the 4S.

Is it really happening?

kre62 recounted how FaceTime stumbled onto his unlimited data plan phones in a forum post.

"However I noticed today that I have FaceTime over cellular and I have an unlimited plan on my 5."

kre62 wrote he turned his 4S off and when it came back on, he noticed the FaceTime over cellular switch had flipped to "on," and both phones are working perfectly over cellular.

He also asked around and found a few coworkers also now have FaceTime, though he didn't specify what phones they owned or what plans they have.

Several other MacRumors forum users backed up kre62's experience after successfully receiving FaceTime, while others weren't so lucky.