Look at the "Easy Flash" tab in 3uTools. Next to each firmware version, you will see a status. If it says "Unsigned," you cannot request SHSH for it unless you have previously saved blobs for that specific device. Only attempt to flash "Signed" versions. 2. Update 3uTools to the Latest Version
Apple uses a digital signing system to control which iOS versions can be installed on iOS devices. When you try to fetch SHSH blobs, 3uTools contacts Apple's servers or third-party TSS (Ticker Server System) servers. The error typically triggers due to three main reasons:
If you are trying to flash a firmware that is , the fix is likely a simple one: update 3uTools, check your network, or try the Pro Flash method. These steps should resolve almost all temporary issues. i unable to request shsh 3utools fix better
If the firmware has a or says Signed , Apple is actively signing it.
If none of the above works, a more advanced approach involves forcing the device into a deeper recovery state. Look at the "Easy Flash" tab in 3uTools
Switch from a Wi-Fi connection to a stable USB tether or Ethernet.
You are trying to install an older iOS version that Apple has stopped signing. Apple permanently locks downgrades to older software. Only attempt to flash "Signed" versions
If you are trying to downgrade to an unsigned version without previously saved SHSH blobs, the process will fail. 3. Use "iTunes Flash" Instead of "Easy Flash"