(b) Now simultaneously hold the Home button and keep the two buttons pressed for 10 seconds: (a) Hold the Power button on iOS device down for 3 seconds: You can follow these simple steps to put your iPhone in DFU mode:

Step 4: You will now need to put your iOS device into the DFU mode. Step 3: Turn off your iOS device and connect it your computer. Step 2: Download iOS 5.x.x firmware file for your iPhone 4/iPhone 3GS from this link or for iPod touch 4g from this link. Step 1: Download RedSn0w 0.9.15b3 (RedSn0w 0.9.15 beta 3) from this link. Here are the step-by-step instructions to downgrade your iOS device using Redsn0w: Please note that when you restore from backup, you will only see only iOS 5.x.x or lower compatible backups.

Since the method restores your iPhone with iOS 5.x.x, you need to go through the process of setting up your iPhone from the backup, which can take sometime.This method will work only if you’ve saved your SHSH blobs for iOS 5.x.x either using TinyUmbrella or had jailbroken your iPhone when it was running iOS 5.x.x and launched Cydia at least once, which would have cached the SHSH blobs on its servers.It is currently not possible to downgrade the newer iOS devices such as iPhone 4S, iPad 2 and iPad 3. This guide is meant for iPhone 4, iPhone 3GS and iPod Touch 4G users.In this guide, we show you how to downgrade your iPhone 4, iPhone 3GS or iPod touch 4G from iOS 6.0 to iOS 5.x.x using Redsn0w. IPhone Dev team released a new version of Redsn0w over the weekend, which makes it a lot easier to downgrade pre-A5 devices such as iPhone 4, iPhone 3GS and iPod touch 2G from iOS 6.0 to iOS 5.x.x using the direct restore option.

Latest version of redsn0w for ios 6.1