Looking for a clear answer in this. If i hook my ipad 2 up to my mac and go to system profiler and USB i see serial number info but am not sure if on of the long numbers listed is my UDID. When I compare it to my iPhone 4's UDID, theres nothing that seems to march the format well enough to be sure which is the UDID. I want to make 100% sure I have the right string so I can register it. Will it be after a specific prefix or section?