Hi all.... sorry but I dont have the strength - as I lay in bed with the flu - to read all the posts about this so here is the question. I have the 3GS version 3.1.2 (7D11) - jailbroken and unlocked using Blackrain - baseband 05.11.07 Bought this in US but now in Italy. I want to upgrade to OS4 and unlock again so I can use my local SIM card. Can I do this, and where the most used - successfull- guide? Thank you, E.