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If you are on a laptop, ensure it is plugged into a wall outlet. Cable Integrity:
If your phone has a history of using cheap car chargers, the internal U2 charging chip may be damaged. This chip regulates USB communication; if it’s failing, the device will be "unable to restore." Summary Checklist Swap the cable for an original Apple Lightning/USB-C cable. Move to a rear USB port on your PC. Update 3uTools to the latest version. Enter DFU Mode before clicking "Flash." Turn off your Antivirus. 3utools error unable to restore idevice--75-
In rare cases, the physical memory chip on the motherboard is failing. How to Fix 3uTools Unable to Restore iDevice (-75) If you are on a laptop, ensure it
due to insufficient storage, a failing battery, or corrupted memory partitions. Move to a rear USB port on your PC
If you continue to get error -75 even after these steps, it is possible your device has a failed NAND flash component, requiring hardware repair.
Check your to ensure no Apple servers (like gs.apple.com ) are being redirected. 5. Rule Out Hardware Failure
If the preliminary checks didn't work, proceed with the following technical solutions in order.