Judging by a new warning dialog in iOS 5.1.1, Apple may finally be preparing to enable FaceTime calls over 3G networks. Although some clues have suggested that this may happen as early as June of last year, the warning message found in iOS 5.1.1 is unique.
Enabling the use of FaceTime over 3G would almost certainly be left up to individual wireless carriers, but officially enabling the feature to work is a great step in the right direction – and if one carrier decides to enable it, the rest will likely follow.
As noted by The Verge (via iDevice) the error dialog only shows up when turning off 3G. The ability to use FaceTime over 3G would come as a very welcome feature to those who don’t have constant access to a WiFi network, but would still like to use the service.