eASY. Just log in to iTunes, update to most recent firmare which will be 3.1.2 Exit iTunes after completion and run Blackra1n and you are good. When the phone reboots. Blackra1n icon should be there on your phone. Just click on it and select Cydia and sn0w. You iphone will be jaibroken and unlocked after reboot and cydia will be right there.