I got this phone from my brother already jailbroken and unlocked so I don't know much about it. It has Cydia on it, and something called SAM prefs. Last night I charged it, and when I woke up it said that Springboard had crashed and was running in Safe mode so I needed to restart it. I did. Now, it's searching for signal and I don't think it's going to find it. When I plugged it back it, it said in iTunes that my SIM card isn't recognized. Does that mean I have to do everything over again?