If a new iOS update introduces bugs, slows down your device, or breaks a jailbreak you were using, you can use saved blobs to downgrade back to a previous, more stable, or jailbreakable firmware.
Understanding SHSH Blobs: The Definitive Guide to iOS Downgrading and Device Freedom
Even if you think you will never downgrade, Use the TSS Saver website. It takes 30 seconds. One day, a jailbreak for your current version might drop after Apple stops signing it. If you have the blobs, you can use a tool like FutureRestore to jump back.
What is it on right now, and what version do you want to install? shsh blobs
However, this also means that if a new iOS update degrades your battery life or introduces bugs, you are permanently trapped on that version once the signing window closes—unless you saved your blobs ahead of time. How Blobs Allow iOS Downgrades
Saving blobs allows you to "capture" this authorization while it is active, allowing you to use it later, even after Apple has closed the signing window. Why Are SHSH Blobs Important?
to "trick" your device into installing that firmware even after Apple has closed the signing window. This is essential for: Downgrading: Returning to a version that supports a jailbreak. Saving a Version: If a new iOS update introduces bugs, slows
If the latest signed SEP firmware is structurally incompatible with the older iOS version you want to downgrade to, the restore will fail or break core security hardware features. As a result, even with perfectly saved SHSH blobs, modern downgrades are largely limited to versions that share SEP compatibility with currently signed firmware.
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However, the Tiva Signing mechanism has made it more challenging for users to jailbreak or downgrade their devices, as it's more difficult to obtain and verify SHSH blobs. One day, a jailbreak for your current version
For the technically inclined, SHSH blobs are deeply rooted in cryptography. The system relies on a challenge-response authentication.
Save the resulting .shsh2 files in a safe location (e.g., Google Drive, Dropbox, or a local backup). How to Use SHSH Blobs
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