I recently bought an iphone used, unlocked. The latest firmware was not installed so I installed then was going to unlock the phone once updated. Well, I didn't realize that izphone is still working on the latest firmware. So, I can't use my sim card and the phone is now basically useless unless I can maybe reinstall the earlier version (from somewhere?trusted source?) and try to unlock again. I'm on an iMac 10.4.11 so any recommended downloads should be compatible. I Anyone following me here? I hope this makes sense and some kind soul with the knowledge to help me will come along!