Dev Team Release the new Pwnage tool 3.1.3 for MAC, which helps you to Jailbreak your iphone 3GS with Firmware 3.1, read the tutorial here. To Unlock your iPhone 3GS, first you have to Jailbreak it. Once you have done this After that go to this Page and starting from Step-2 do all the steps [...]

Here is the tutorial which help you to Jialbreak your iPhone 3GS 3.1, but this is for Mac Users only not for the Windows Users. NOTE: PwnageTool will work for the iPhone 3GS if you have a jailbroken firmware 3.0 or 3.0.1. So read all the steps Carefully Before doing this. Note:- This one is [...]