The following step by step guide will help you downgrade your iPhone with firmware 3.1 to firmware 3.0.1. For those of you who upgraded to iPhone 3.1 may have found your device to be locked and un-jailbreakable as the tools for jailbreaking and unlocking are not out yet for iPhone OS 3.1. Fortunately, there is still a way to downgrade your phone from firmware 3.1 to 3.0.1. I have tried it on my iPhone 3G and it works perfectly on it.

Complete step by step guide on how to enable the hidden Camera Roll, Video Editing capabilities and Video uploading to YouTube options of iPhone 3GS in your iPhone 3G and iPhone 2G.