Downgrade Iphone — 4s To Ios 5 !full!

The iPhone 4s introduced a major security hurdle: the (or SHSH blob). Unlike the iPhone 4 (which had a hardware exploit allowing permanent downgrades), the 4s uses a chain of trust that requires Apple’s signature for each restore. Without a saved SHSH blob from the time iOS 5 was being signed , a standard downgrade is impossible.

If you saved your digital signatures (SHSH blobs) for iOS 5.x back in 2011–2012, you can perform a permanent, untethered downgrade. downgrade iphone 4s to ios 5