First and foremost, for those of you who are on iOS 5.0.1 already, you are out of luck. Now those of you who are still on iOS 5.0, you can now save not only your SHSH blobs but also your APtickets, which are used in Apple’s new firmware verification process. What exactly does this mean? It means that if you are on iOS 5.0 right now, and for some reason you need to restore (it updates to iOS 5.0.1) then you can have the option to downgrade back to iOS 5.0 granted you have used iFaith to save your APticket before you restored.

It should be noted that if you are on iOS 5.0.1 already, you CANNOT downgrade to iOS 5.0.

This is mainly for people who have saved their APtickets on iOS 5.0 as they will be the only ones who can downgrade back from iOS 5.0.1 to iOS 5.0.

Detailed Information

An APticket is a piece of information, almost like a screenshot. When you use Apple’s iOS 5.0 firmware, your device has an APticket saved for iOS 5.0. When you update to iOS 5.0.1, our APticket changes to an iOS 5.0.1 APticket. This is how Apple keeps you from downgrading.

By using iFaith, you can not only save your SHSH blobs, but also your current iOS 5.0 APticket. This allows you to use the APticket you had for iOS 5.0 to downgrade back to iOS 5.0 from iOS 5.0.1 since your iOS 5.0 APticket is still valid. Now if you don’t save your APticket when you are on iOS 5.0, ten your new APticket is the one given to you by iOS 5.0.1, which means that you don’t have an APticket for iOS 5.0. Since you don’t have one, you cannot downgrade back to iOS 5.0 from iOS 5.0.1. In this case, iOS 5.0.1 would be the lowest you could go.

Currently, iFaith only supports Windows, as iH8sn0w is a Windows user himself. He is also the famous developer behind Sn0wbreeze, which is the Windows-only jailbreak tool. At this point in time, there isn’t any information regarding a Mac version and its release.

Download iFaith 1.4 for Windows

iFaith release notes:

iFaith v1.4 Release notes:
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* Now dumps iOS 4.4.x (Apple TV 2)/5.0.x apticket + SHSH blobs!
* Dumping is MUCH faster.
* Full Windows XP support.
* Major code improvements.
* Bug fixes.

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** DOES NOT SUPPORT A5 DEVICES YET! **
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Now available at: http://iH8sn0w.com
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// iH8sn0w

“You gotta believe in the voltage that lives inside us,
So lets buckle up and break our walls down. (Whooooaahhoo)”
– @Skrillex

We recommend dumping your SHSH and APtickets if you’re on iOS 5.0. It will give you the option to downgrade back to iOS 5.0 anytime after you have used the software utility.

Sources: iH8sn0w