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Aggressive firewall settings or antivirus tools can block the 3uTools execution client. Temporarily shut down your firewall before trying to flash the device again.

When flashing an iPhone or iPad, 3uTools contacts Apple's servers to request an APTicket/SHSH blob tailored to your device's unique ECID. The request typically fails at the 9% mark due to three main factors:

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Before tweaking any software settings, confirm that Apple is actively signing the iOS version you want to install.

If "Easy Flash" fails, try using the iTunes engine within 3uTools.

Delete those lines entirely or put a # symbol in front of them to comment them out. Save the file and restart your computer. 4. Temporarily Disable Firewall and Antivirus

Security software often flags 3uTools’ SHSH request as suspicious because it mimics network traffic to Apple’s validation servers (gs.apple.com).

to an older iOS version that is no longer signed, the request will fail because Apple's servers will not issue the necessary certificate. Check sites like

Relaunch the application and try the flashing process again. 2. Switch Flashing Modes If the "Easy Flash" mode fails, try using the iTunes Flash utility within 3uTools. Navigate to the Flash & JB iTunes Flash instead of the default "Easy Flash" option.