[ame]http://www.youtube.com/watch?v=ATWIGsKJrIY[/ame]
This video is to show you how to further fix your Facetime if you are still having problems after the Cydia update. It is really simple to fix, it requires you to get on WiFi, enable Facetime, and reboot your phone. Nothing will be erased in the process. After you do this, you will have your Facetime fully working.