Unlock iPhone 3G running 4.2.1(8C148)BB/MF 05.15.04 w/out Jailbreak or IPSW restore.

[Tanzir]

Hello,
I have been trying to unlock an iPhone 3G running iOS4.2.1(8C148) with a BB/MF:05.15.04. But the ironic part about this is, I don't want to Jailbreak this phone which surely means I won't have repo666.ultrasn0w on Cydia to do that. And along with that, I am also willing to find a way to unlock this phone w/out restoring to a new/custom firmware which means no redsn0w either.. And all these solutions are need to be done using either Windows or through a Wifi network. My phone is locked on At&T carrier and it's outside of US right now so that's the reason it needs to be unlocked, and the good part about it is w/out putting in any SIM.. I am still being able to access the phone, no iTunes emergency screen showing up yet. So all I need to do right now is just find a way to unlock it and It'd be good to go, I hope!
Please reply me if there's a possible solution for this.
Thanks a lot for your time.

[planktonika]

AFAIK, you're out of luck. Jailbreak is the only way you'll unlock it.

[Tanzir]

AFAIK, you're out of luck. Jailbreak is the only way you'll unlock it.

Yeah this really seems to be pretty messed up having an iOS 4.2.1 on 05.15.04.
Now I am trying to find a way how to keep my GPS alive after the Jailbreak and Unlock. This is so ridiculous!