There's so many jailbreaks and unlock method i'm not even sure which one is up to date that works and is reliable for iPhone 3G iOS 3.1.2 or probably 4.1? It's at 4.2.1 at the moment. Can anyone guide me what the best method for this jailbreak & unlock version. Before I was using blackrain & blacksn0w. Also, what are the steps to start downgrading? I have my 4.1, 4.0 shsh save on cydia. Not sure how to retrieve it to downgrade?