okay, i updated to 3.0, and i had some old .ipa from the 2.2.1 firmware, those are cracked. so then i connected my phone to my laptop, synced it, and itunes told me some apps are not gona be added. so okay. but i restarted my iPhone, and its stuck at the Apple screen for about 2 mins. then the rotating wheel appears and freezes up. i put it into DFU and restored it, and now rejailbreaked it, its working fine now. BUT I DONT HAVE A OFFICAL SIM, so how do i know if its bricked or not??