Hello everyone, I purchased an iphone for my girlfriend. It was unlocked and jailbroken already and had the Installer 3.0. She didn't want to re-type all her contacts so she tried snycing it through iTunes on her lap top (Window's XP). I really don't know what happened but now the iPhone says "NO SIM card installed, Insert an unlocked and valid SIM to activate iPhone" Can someone guide me to the correct information to get this iPhone up and running again. I greatly appreciate it. Thank's guys!