Help ! Error 1600 on Restore from Custom ipsw
i have an iphone 3G from a friend and dont know what firmware was on it when i received it....
It is now restored to factory settings using "iPhone1,2_2.2.1_5H11_Restore"
Now, Its on the "Slide for emergency" screen, but the signal bars are visible on top (it doesnt say 'no signal').
Can i assume that its been unlocked before and the baseband is unlocked ??
Also, i made a custom ipsw with "activate" unchecked.
But now, when i enter dfu and try to restore from the custom ipsw, i get an error 1600 :(
big thanks ....