Downgrade iOS 4.2.1 GM To Previous iOS Firmware Versions

In case you have realized that upgrading your existing iOS to iOS 4.2.1 GM is a big mistake, then you can downgrade it back to your preferred iOS firmware. You can do that by visiting the link I am about to share below which contains step-by-step instructions to downgrade to the previous iOS version.

But before going to the instructions, I'd like to suggest that you can jailbreak iOS 4.2.1 GM on iPhone 4, 3GS, 3G and iPod using Redsn0w 0.9.6b2, but it won't benefit you much considering Cydia is currently not working with the iOS.

Let's get to the point and visit the instructions page to downgrade iOS 4.2.1 to iOS 4.1, 4.0.2 & 4.0.1 for all iDevices.

Good luck guys!

Posted in: Downgrade