[blankito350]

i have an iphone 3g 2.2.1, modem firmware 2.30.03... the thing is that i CANT get it work with at&t, i tried to activate thought itunes but it says an error "not valid sim card"..i tried with 2 different simcards.
b) i jailbroke it, restore it via itunes and DFU mode and nothing happends still getting 1 little signal bar and no carrier name. this is my setting screen shot (NULL)(NULL) << note this thing on carrier setting...right now have the att simcard

[dejawoo]

uncheck the activate box on quickpwn...

[smirkis]

restore via itunes to 2.2.1 fresh not in dfu mode.

when its done activate via itunes

then go in quickpwn and jailbreak and uncheck activate

[blankito350]

itunes says that the simcard is not valid... i dont know whats going on here.. someone says that ATT lock the iphone to just read one simcard at a time. this is an used iphone, so i dont have the first simcard installed on it.... any suggestion?