Select at the bottom (Note: This erases data; backup first). Click Flash . How to Flash Unsigned iOS Versions (Advanced Users)
You are trying to install an iOS version that Apple is no longer "signing" (authorizing). Apple usually stops signing older versions shortly after a new update is released, making downgrades difficult or impossible. 3utools error unable to request shsh hot
Apple must actively sign an iOS version for 3uTools to fetch the SHSH blob. Open the tab in 3uTools. Look at the firmware list for your device. Select at the bottom (Note: This erases data; backup first)
If none of the above works, the most reliable method is to entirely. Use the dedicated TSS saver by tihmstar. Apple usually stops signing older versions shortly after
The error in 3uTools typically occurs during the flashing process (often at 9%) when the software cannot retrieve a digital signature from Apple's servers to authorize the firmware installation . This signature, known as an SHSH blob , is required for every restore or update. Why this happens
The "Unable to Request SHSH" error in 3uTools typically occurs during the flashing or restoring process when the software fails to communicate with Apple's servers to verify firmware signatures