so yeah ive retty much ruined two perfectly good iphone 4's trying to update to ios 5 update goes through fine, udid is registered but than it says my sim is unsupported, after that there is no way to make the phone work again ive tried dfu mode, restoring back to ios 4.3.3 and the same error message comes up sim us unsupported, sim works fine in other phones, doing this on a pc, anyone have any ideas!!! please help!