Apple strictly limits installations to currently signed iOS versions. If you are attempting to downgrade to an obsolete iOS version without previously saved local SHSH blobs, the installation will fail at 9% every single time. Check the firmware list directly inside the 3uTools window.
An outdated version of 3uTools may not support the latest iOS signing protocols, causing the SHSH request to fail. Similarly, corrupt or missing Apple Mobile Device USB drivers in Windows can prevent proper communication between your computer and iPhone, leading to the error.
An outdated copy of 3uTools might use legacy server protocols that Apple no longer recognizes. how to fix error unable to request shsh on 3utools when top
: You are attempting to install or downgrade to an older iOS version that Apple has stopped signing.
For older 32-bit devices (like the iPhone 4s), a jailbreak can sometimes help you install older firmware. Apple strictly limits installations to currently signed iOS
Comprehensive Guide: Fixing 3uTools "Unable to Request SHSH" Error
Follow this complete step-by-step troubleshooting guide to bypass the SHSH restriction and complete your firmware restoration successfully. 1. Verify Apple Signing Status An outdated version of 3uTools may not support
Example: tsschecker -d iPhone10,1 -e 0x1111111111111111 -i 15.7