after finally getting my firmware downgraded, i went to jailbreakme.com after cydia was installed i tried to use blacksn0w to unlock. BIG MISTAKE! i swiftly learned the importance of baseband when it crashed my iphone. i had to restore, redowngrade to 3.1.3 and re-jailbreak my phone. now it looks like i need to ultrasn0w 1.0-1 to unlock but i'm hesitant. i dont want to crash my 3G again! their website says its good on 3G baseband 05.13.04 (iOS 4.0/4.0.1). does anyone know if it will work on 3G baseband 05.13.04 (3.1.3)?? thanks for your time!