9to5Mac also reports that some of Apple's most important carriers also have versions of iOS 5 in hand for testing. One person claiming to be in on the iOS 5 testing with the carriers notes that the software is fast, stable, and very polished indicating that it is very near launch ready, if not already set for launch. One of the key features reportedly specifically being tested is FaceTime over 3G. The feature is being tested, but it's not clear if it will be offered to end users. The iPhone had tethering capability long before the feature was offered.