I have finally got an IPhone 3g from an O2 store which happened to have two left, so can now use my phone contract properly again!

Anyway, what you get with the jailbreak for the 3g IPhone is the installer app to install non apple-sanctioned software. At the moment not a huge amount is available, but this will definately expand over time.

There is however an openSSH shell, a pacman emulator, and a NES emulator, which more than makes this upgrade worthwhile!

Lets get started! So first you need to download PwnageTool. Currently at 2.0.1. you can download it direct from the authors here or here or here

You will need a copy of the firmware for the phone for the install. There should already be one on your system, if there is not, the IPhone 3G firmware is available here.

What the PwnageTool does is create a new backup to restore the Iphone with. It creates a new .ipsw file for you. So follow the instructions on the screen to create this .ipsw

When PwnageTool is finished, it will open up ITunes. At this point you must restore from this new backup PwnageTool created. To do this press and hold down the “alt” key and click on “restore” in ITunes. This will bring up a file selection, select the new .ipsw you just created and restore!