The infamous iPhone Dev-Team has updated its PwnageTool for Mac to make it compatible with the new iPhone 3.1.2 firmware which was released last week. This latest version of PwnageTool can jailbreak the original iPhone (Edge), iPhone 3G, iPhone 3GS and iPod touch (1G and 2G) running on iPhone firmware 3.1.2. Follow the step-by-step instructions below to jailbreak your iPhone with firmware 3.1.2.