Hello everyone, been away from the jailbreak, iphone scene, for a while, so really need advise. I have an iphone 3gs, running version 4.0.1 and modem firmware 05.13.04. I haven't got a clue, what method I used to jailbreak it, and unlock the device. I now want to update it, to latest ios software, which I believe is 5.1.1, my dilemma, is can i preserve the unlock, and proceed to jailbreak, as well please.?