It might not be possible.
http://jailbreak-me.info/jailbreak-and-unlock-wiza..
Your iphone is jailbreakable at this version, but for the unlock I'm not so sure.
http://blog.iphone-dev.org/ for detailed information
For unlocking you could just wait for ultrasn0w to come out with a solution for your baseband (which might not happen), or try one of those "factory unlock" websites. unfortunatly I believe most (if not all) are scams.
2012-09-16 18:22:08