version (limited to iPhone 4 and older devices). In late 2011, the iPhone Dev Team added features to redsn0w that include the ability to save SHSH blobs with APTickets and stitch them into custom firmware in order to restore a device to iOS 5 or later. Replaying SHSH blobs for newer devices (iPad 2 and later) is not always possible, because there are no boot ROM (hardware level) exploits available for these devices. As of October 2012, redsn0w includes features for restoring newer devices between different versions of iOS 5, but it cannot downgrade newer devices from iOS 6 to iOS 5. See also Hardware restrictions References Apple Inc. software IOS jailbreaking Hardware restrictions