Via 9to5Mac:
Like it does with the iOS Personal Hotspot feature, U.S. carrier AT&T appears set to control and charge for the iOS 6 FaceTime over Cellular feature. This iOS 6 enhancement brings the formally WiFi only iOS device video calling feature into a more useful state, letting people use the feature practically anywhere they may be.
If the future of cell phone bills is a flat data fee, AT&T is laying the groundwork to make it expensive.
