Jailbreak and unlock iPhone 3G 8GB firmware 3.1.3?

I tried snowbreeze, Spirit, and he would try to redsn0w, but it does not support restoring 3.1.3 ipsw. Nothing worked. It always causes an error. I really really need to jailbreak and unlock since I'm on the carrier T-Mobile. The release is just fine, just please someone help me with this! I'm going crazy here! AAAA! = @ @ @ If it's too difficult to explain here, please send me an email using jkmyay@yahoo.com

You do can not unlock a 3g running 3.1.3. You'll have to wait to see if a release for iOS4 is developed.

Spirit Jailbreak for iPhone iPod iPad 3.1.3.avi