My fiance's iphone is 3gs 3.1.2 was jailbreaked by blackrain and yesterday it phone got frozen so she had to restart then she got tried to jailbreak it again by blackrain on mac and it didnt work, the picture of gehot stays on the phone , she tried to restore the firmware 3.1.2 costume and the original one but itune refuse and giving her the message that the firmware is not identical .Then she tried a costume build 3.1.3 by pwange tool and it gave her error 1600 and 1604 . we google everything and we tried everything , and because she is on mac its difficult to do saurik server thingy.

So if someone please have an idea post here