According to MuscleNerd, an instrumental developer in the iOS-hacking community and arguably the face of the iPhone Dev Team, the next Redsn0w release will introduce downgrade support for newer iOS-based devices!
For those of you who are unaware, Apple changed the method used to sign firmwares for iOS 5 and up some time ago, thus rendering previous methods of downgrading useless on newer iOS-based devices.
Aside from iH8sn0w’s Tweets about a month ago that mentioned utilizing an “apticket” loophole to downgrade A5 (iPhone 4S and iPad 2) and A5X (3rd-generation iPad) devices, the promise of downgrading new devices was looking pretty grim; until now.
As for the ability to restore and stitch “on the fly”, Redsn0w will be able to grab SHSH blobs (which will still be required for downgrading, even on the new devices), merge them with a corresponding IPSW of your choosing and downgrade your device inside a single interface.
Unfortunately, as usual, there isn’t a set release date for this upcoming Redsn0w release – stay tuned for complete coverage.