this device is not registed as a part of the iPhone developer program (but it is )
i register my udid to my account today and all i get is that stupid message
plz help thnx
iPhone 4S, iOS 6 Beta 1
Just Restore 5.1.1 (from DFU) and the press Option (or Shift in PC) + Update (Not Restore) and then select 6.0 FW it will PASS!!!