Apple only allows restoration to iOS versions they currently "sign." If you are trying to install an older, unsigned version, the SHSH request will fail. Check if your firmware is signed on sites like ipsw.me .
If basic fixes fail, the issue usually stems from corrupted Apple communication drivers on your PC. Repair the Apple Driver via 3uTools
Sometimes the "Easy Flash" method in 3uTools glitches. A known workaround is to use the integrated iTunes engine within the app. Instead of "Easy Flash," select the iTunes Flash option within the 3uTools interface. how to fix error unable to request shsh on 3utools when new
Solution: If the version you want is unsigned, you available. 2. Update 3uTools to the Latest Version
If the firmware is unsigned, you cannot install it unless you have previously saved SHSH blobs for that exact device. Download the latest signed version instead. 2. Update 3uTools to the Latest Version Apple only allows restoration to iOS versions they
Did you download the firmware file or from an external site? Share public link
By following the fixes in this guide—updating the software, checking signing status, changing request sources, or using alternative tools like TSS Saver—you can successfully save SHSH blobs for any still-signed iOS version. Repair the Apple Driver via 3uTools Sometimes the
This comprehensive troubleshooting guide breaks down why this error occurs on new or recently updated devices and provides concrete steps to resolve it. What Causes the "Unable to Request SHSH" Error?
If the version is unsigned, your only option is to save blobs using a different method (see Fix #6) that relies on on-device nonce generation, or wait for a jailbreak that allows setting an apnonce.