I found a 02 sim card in my spare room(of all places) so i stuck that in and the phone started to operate abit more, so i then did that spiritjb and it worked first time, then it made me download cydia? and where im at now is the phone works as in i can see all the menus and go on the internet/set up wifi etc, but i put my three sim back in and theres no signal at all, and the phone doesnt seem to pick it up?

Is there there some settings i need to play about with or is it because Spirit did not unlock it and i still need to do it?