GeoHot is making a buzz on the Internet with his new Blacksn0w to unlock 05.11.07 baseband on iPhone 3G and iPhone 3GS running iPhone 3.1.x firmware. Just after releasing the famous Blackra1n for Mac OS X and Windows to Jailbreak iPhone and iPod Touch With 3.1.2 Firmware GeoHot is almost on the verge of releasing the Blacksn0w tool.

GeoHot has mentioned on his blog that he has arbitrary code running on the baseband which clearly tells us that he will soon be releasing the Blacksn0w tool to unlock your iPhone baseband 05.11.07 running iPhone 3.1.x firmware.

GeoHot is very famous with his Blackra1n tool which is a 30 second tool to jailbreak iPhone or iPod Touch. If you are looking to just jailbreak your iPhone or iPod Touch then read the below posts

How to Jailbreak iPhone and iPod Touch With iPhone OS 3.1.2 Using Blackra1n on windows
How to Jailbreak iPhone and iPod Touch With 3.1.2 Firmware With Blackra1n for Mac OS X

But if you are looking to unlock your iPhone to use any SIM card then you need to jailbreak it using the PwnageTool. Below is the guide on how to unlock iPhone

Procedure to Jailbreak iPhone 3GS and 3G With 3.1.2 Firmware Using PwnageTool 3.1.4
How to Unlock iPhone 3GS and iPhone 3G with 3.1.2 Firmware Using Ultrasn0w