The developers of 3uTools are aware of these server-related errors and have released fixes in newer versions. According to the official 3uTools team, updating to resolved this error for many users by updating how the software communicates with Apple.
: If the error persists in Recovery Mode, try putting your device into DFU (Device Firmware Update) Mode before starting the flash. What are SHSH Blobs?
Every time Apple releases a new iOS version, it stops signing the older version after a brief grace period. When 3uTools displays the "Unable to request SHSH" error, it means the software cannot secure the required cryptographic signature to validate the iOS installation file (.ipsw) you are trying to use. i unable to request shsh 3utools fix install
Browse your computer for the .shsh or .shsh2 file corresponding to your device's ECID and the exact iOS version you are trying to install.
To resolve the "I unable to request SHSH, 3uTools fix install" issue, try the following step-by-step solutions: The developers of 3uTools are aware of these
Aggressive security software can intercept the data packets 3uTools sends to request the SHSH blob.
If it’s red (unsigned), you must download and flash the latest signed version instead. How to Fix 3uTools 9% ERROR Unable to request SHSH Latest What are SHSH Blobs
If you want to troubleshoot further, tell me your , the iOS version you want to install, and if you have saved blobs in the past. I can give you the exact steps for your device. Share public link
Troubleshooting: How to Fix "Unable to Request SHSH" in 3uTools