Detailed Tutorials On How To Downgrade Any iPhone
If you already know it all about downgrading and are just looking for guides and tutorials, then scroll down to find instructions on how to Downgrade.
Simply look for the firmware version you want to downgrade and the type of iPhone you have, then click on the link to see a detailed tutorial.
iPhone 4S Downgrading Guides
iPhone 4 Downgrading Guides
iPhone 3GS Downgrading Guides
iPhone 3G Downgrading Guides