How to Jailbreak iPhone 3G OS 3.1 with PwnageTool 3.1 (Mac)

In this guide you will learn how to jailbreak iPhone 3G running iPhone OS 3.1 with the help of PwnageTool. First of all you've to create custom ipsw, which will help to jailbreak iPhone 3G and will also allow to install applications on your iPhone device and then you will be able to unlock iPhone [...]