One of the drawbacks to FaceTime was that unless you had a jailbroken iOS device, making FaceTime calls was only possible over WiFi connections. Well it looks like if you wanted to make FaceTime calls over cellular networks, you might have to start paying for it – at least as far as AT&T customers are concerned. The folks at 9to5 Mac have discovered that when attempting to enable FaceTime over cellular, they were greeted with the message above. According to AT&T who released a statement to the website, “We’re working closely with Apple on the new developer build of iOS6 and we’ll share more information with our customers as it becomes available.” While it was not stated explicitly, it has been speculated that just like the Personal Hotspot feature, AT&T might be interested in charging users an additional fee for making FaceTime calls over cellular. After all, with the amount of data consumed for video calls, it we have to agree that it does not seem like a stretch that AT&T might want to cash in on that. However it seems that when they tried to enable that feature on a Verizon iPad WiFi + Cellular device, they were not met with any message and was enabled with no issue.