UPDATE : A new version of custom firmware 3.1 for iPhone 2G/3G/3GS is now available here!
Free your iPhone 3G 3.0 from Apple’s chain by jailbreaking your iPhone which provides you with various customization features and even unlock feature which Apple and your official carrier hate! There are various options available to achieve this level of customization on your iPhone such as download firmware files, bootloader files, jailbreak/unlock tools such as Redsn0w/Pwnage or QuickPwn.

If you are not the one to download all the various files and just want the ultimate result, …

iPhone Dev-Team delivers again in style! All the basebands for iPhone 2G, 3G released till June ’09 are unlockable by software means, thanks to the super famous yellowsn0w. Pwnage tool and QuickPWN are being worked upon to be ready for the D-day! Please throw away the turbo sims and refrain from buying into their propaganda! The entire jailbreak community will be able to upgrade to the latest in Apple’s offering – the revolutionary iPhone 3.0 software which managed to sneak in the most awaited features – MMS, tethering, Copy/Paste and …

For a change, I published 3 videos which definitely enables a total noob to unlock his/her iPhone without much difficulty. Latest Firmware via iTunes (2.2), QuickPwn (Jailbreak) and yellowsn0w via Cydia/installer (Unlock) hold the three key steps for a successful unlock.
Before proceeding further, make sure you are equipped with the following :
1) Strictly iPhone 3G Updated to 2.2 firmware via iTunes (2G iPhones have a different process – BootNeuter from Cydia).
2) Intel Mac (10.5.6 s/w update) or Windows machine. [Mac users, make sure DFU mode is enabled (10.5.6 s.w update …