Okay so I have an iPhone 3G that someone tried to unlock on 3.0 with ultrasn0w. I am using a mac with Tiger. I want to avoid using Windows if possible becuase I dont have a windows machine. I have DFU restored it with an AT&T sim in it (active with iphone 3g plan) and it won't pick up a signal, and when i connect it to itunes on my mac it says theres an error with a long number and wont connect. what can i do without having to use a windows machine.