TinyUmbrella allows you to take backups of SHSH blobs (ECID SHSH) to let you downgrade to older iOS versions.
He has provided the following information on his blog:
TinyUmbrella now has support for saving 5.1 SHSH for Apple TV 3 and the iPad 3 (all versions). As of now we still cannot restore them but we are working on getting that working from a bunch of angles. I’ll let you know more when I do.
SHSH blobs of iPad 2, the new iPad, Apple TV 3 and iPhone 4S are not useful currently as they can’t be used to downgrade to older version, but it is still a good idea to save SHSH blobs as they could end up being useful in the future.
You can download the latest version of TinyUmbrealla from Semaphore’s blog.Like this post? Share it!