What do either of them do?
On iOS 4.1 3G Unrestrictor has major issues for me. When me and a friend attempted to use it I would call him and hit FaceTime. He had to also hit the FaceTime button as he got no alert he was getting a FaceTime call from me. If either one of us tried to just straight up FaceTime with no call it just showed up on the other persons phone as a missed call with no ringing or anything. Very annoying!!!
Are you on limera1n or GP? Do you have the newest version of 3GuN? It works fine for me...