Hi,
I have a iphone 3G with 2.2.1 and baseband 2.30.03. Its locked and not jailbroken with AT&T. I wanna jailbreak it and unlock it.
Thanks to dev-team, This is what I did to unlock my iphone
1. I updated iphone 3G to 3.0 using itunes.
2. I used pawnagetool 3.0 and created a custom ipsw.
3. I restored my iphone with this custom ipsw
whoala! I got the cydia and the icy icons on my iphone.
Then followed instructions from dev-team to get ultraSn0w from cydia and unlocked the phone works like a charm!!