After announcing the other week that it would extend FaceTime to all iPhone 5 owners, no matter their data plan, AT&T has started rolling out the video-chat service to even more customers, according to anecdotal reports on MacRumors. AT&T has not confirmed this — and it may not last forever — but iPhone 4S users and those with unlimited data plans say they can now FaceTime not only while connected to wireless Internet, but while out and about in the data-only wilds. From Forum user kre62 who has an iPhone 4S and an iPhone 5 with an unlimited data plan, both previously exempt from this feature:

I just turned off my other phone, a 4S and turned it back on, only to find the switch flipped to ON for facetime over cellular. Both phones work perfectly over cellular. 

I also checked a few coworkers phones, all now have FT over cellular.

I have separately confirmed this with someone who has an iPhone 4S with an unlimited data plan.

MacRumors's Arnold Kim suspects that AT&T is rolling out this functionality, which is why some people have started to see it while others haven't. But a sadder possibility is that this is all a big mistake related to the announcement from last week that extended FaceTime to all LTE device users with a tiered data-plan. The wireless company said that would take 8-10 weeks to implement. Perhaps it got some wires crossed somewhere (because that is how they turn on and off these things, of course). Just in case, we'd suggest assuming that worst-case-scenario until any official word from AT&T. In the meantime, send Thanksgiving wishes to everyone you know using FaceTime over data. Might as well take advantage.