Great news for AT&T users who have been frustrated about the company's stance on handling FaceTime over Cellular. The carrier just expanded availability of the feature, but there's still a catch: you'll need an LTE device on a tiered data plan. To date, that would include the iPhone 5 (not the iPhone 4S or earlier) as well as the newer iPad devices with LTE. Of note, you don't necessarily have to be in an LTE area to make use of FaceTime over Cellular, but the phone itself has to support it. Strange, but that's how it's structured for now. This applies to iOS 6 users, and the carrier hopes to roll the functionality out to customers within the next eight to ten weeks. Perhaps as its LTE network expands, it'll be expanded to even more phones and plans.