Alright my cousin has a 3GS running on 4.0.2 and every time she puts the sim card in and tries to connect to the internet the phone gets hot and shuts off. I'm lost on this one I'm gonna try to upgrade it to 4.3.3 and maybe restore it. Anyone have any idea what to do??? EDIT: Also the sim card works in other phones. And it will go online via WiFi without the sim card.