This step-by-step tutorial will show you the details about how to jailbreak your iPhone 3GS with OS Firmware 3.1.2 using PwnageTool 3.1.4 for Mac OS X. PwnageTool is a Mac and Mac only tool. There is no equivalent for Windows and no one knows yet when such a tool for Windows will be released.
One thing you need to know is that jailbreaking is different from unlocking. This guide only teaches you how to jailbreak your iPhone. (Read our another post Difference Between Jailbreaking and Unlocking
if you are not …