: You can only flash iOS versions that Apple is currently signing. Check status sites like to ensure the firmware you've downloaded is still valid. Use iTunes Flash Mode : In 3uTools, try switching from "Easy Flash" to the iTunes Flash
The "Unable to request SHSH" error on 3uTools for a new device or new iOS version almost always means or the 3uTools database isn’t updated yet . Always check signing status first—if it’s unsigned, no tool can fix it. If it is signed, update 3uTools, switch servers, or manually fetch blobs via a browser-based TSS saver. how to fix error unable to request shsh on 3utools when new
A faulty lightning or USB-C cable can cause data timeouts at the critical 9% authorization stage. Disable VPN/Firewall: : You can only flash iOS versions that