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Shsh Blobs May 2026
SHSH blobs (also known as SHSH2 blobs or digital signatures) are unique files that Apple uses to control which iOS versions you can install on your device. By saving these "signatures" while Apple is still officially "signing" a firmware version, you can potentially downgrade or restore to that version later using tools like FutureRestore, even after Apple stops signing it. How SHSH Blobs Work
The Lowdown on SHSH Blobs: A Guide for iOS Users shsh blobs
Apple "signs" iOS versions for a very short window (usually 1-2 weeks after a new release). Once the signing window closes, you cannot downgrade. SHSH blobs (also known as SHSH2 blobs or
You don’t need to be jailbroken to save blobs, but you do need to do it immediately while the window is open. Common community tools include: Device-specific: Blobs from one device cannot work on
Downgrading iOS: If a new update makes your phone slow or you dislike the features, you can only go back to an older version if you have saved the blobs for that specific version while it was still being signed.
- Device-specific: Blobs from one device cannot work on another (due to ECID).
- Version-specific: Blobs for iOS 14.3 only work for that exact build.
- Replayability: On older devices (A5–A11 chips), blobs can be replayed without modification. On A12+ (iPhone XS and newer), additional nonce entropy makes replay difficult without a bootrom exploit.