I'm selling my iPhone, and would like to keep it on the same firmware (4.0). It's a 3GS. When I Option+click Restore in iTunes, and find the ipsw file (Downloaded from iClarified) for the 4.0 3GS one, It says: "This iPhone ___ could not be restored. This device is not eligible for the requested build" What could be the problem? I'm jailbroken using jailbreakme, and I'm unlocked using UltraSnow, but other than actually jailbreaking and unlocking, I haven't done anything else. EDIT: The ipsw I downloaded is 8A923, and so is my iPhone. My baseband is 05.13.04, and I'd like to keep it at that if possible, for unlocking purposes.