I'm looking for a permanent way to disable all outgoing calls from a deactivated phone. Obviously, once the phone is deactivated, no regular outgoing calls can be made. However, 911 calls will still go through. I am hoping to be able to comfortably hand the phone to my son so he can play games, etc. on it (previously downloaded apps.) But I don't want any accidental 911 calls going out. Any ideas? I've read several other threads but haven't seen anything that specifically addresses this concern. Thanks.