To fix the error on 3uTools, you must update 3uTools to its latest version, verify that Apple is actively signing your selected firmware version, and ensure a stable network connection to Apple's verification servers . This error typically stops your flashing progress abruptly at 4%, 9%, or 19% , indicating that the program cannot fetch the digital signature (SHSH blob) required to validate the iOS installation. Why the "Unable to Request SHSH" Error Happens

Go to Flash & JB -> Pro Flash , select your firmware, and try to flash again. Alternative Methods: Saving and Using Local SHSH Blobs

: For advanced users, you can try manually requesting an AP ticket by copying your device's and using an external service like to check for available signatures. Troubleshooting Checklist

Are you attempting to on your device?

), 3uTools cannot request the SHSH blobs because Apple's servers will not provide them. Check Network Stability

Visit an authoritative verification tool like IPSW.me or check the Smart Flash section directly within 3uTools.

: Your PC has an unstable internet connection, or local security software is blocking 3uTools from communicating with Apple’s verification servers.

DFU (Device Firmware Update) mode offers deeper access and can bypass standard recovery state issues.

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.

: Ensure you have the latest version of iTunes installed on your PC, as 3uTools relies on its drivers. Are you attempting to to an older iOS version, or are you to the most recent one?

This is the most common reason. Once Apple stops signing a specific iOS version (often when a new version is released), you cannot install it through official means. 3uTools will try, fail, and show the error. This is Apple's security measure to prevent downgrading to older, potentially less secure versions.