Alternatively, download the newest version directly from the 3uTools Official Website 2. Verify iOS Signing Status
If the error occurs “when flashing,” try putting your device in before requesting SHSH.
If the communication between your device and the PC is faulty, the SHSH request may fail. tab in 3uTools. iTunes Utility Repair Driver
If none of the above works, provide the exact error text/message, your device model, iOS version, Windows version, 3uTools version, and whether you’re using DFU or normal mode — I’ll suggest next steps.
If the connection is unstable, go to the Toolbox tab in 3uTools and select iTunes Utility . Click Repair Driver to reinstall the necessary components for your PC to communicate with the iPhone.
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