FaceTime is a video calling technology using the camera in the iPhone 4. Before that, this technology worked only through Wi-Fi and only between two owners of the iPhone 4. Now FaceTime can also work on 3G networks. Unblock this feature is very simple. Just download the updated version of the Fring application. Unlike the previous version, the updated application can recognize not only the rear cameras of the iPhone, but also the front ones. Also, you can now organize video chat rooms, update Facebook status, get contact information from Twitter and much more. As before, the Fringe can be downloaded for free, but the developers are not responsible for any "lags" in video communications on 3G networks. All questions to your operators.