Downgrading iOS 4.2.1 to 4.1, 4.0.2, 4.0.1 on iPhone, iPod touch and iPad

With the release of iOS 4.2.1, many iPhone, iPad and iPod users upgraded to it. But as Cydia is still broken so jailbreaking does not makes sense. Here is a guide that will help you in downgrading back to 4.1, 4.0.2, 4.0.1. Steps: First of all, you need to have “SHSH blobs” for the firmware

How to Downgrade iOS 4.2 to 4.1 / 4.0.2 / 4.0.1 on the iPhone 4, 3G, 3GS and iPad

IOS 4.2 has been officially released. Like the IOS 4.1 and IOS 4.0.2, the new IOS 4.2 when you can not jailbreak. In addition, upgrading to a new baseband, making it impossible to unlock it with the current version of Ultrasn0w. So if you have a jailbroken and unlocked iDevice, it is best to stay away this new firmware until