Check cable and ports:
In the world of iOS restoration, error codes are signals from the low-level communication between your computer, 3uTools, and the iPhone’s bootloader (iBSS, iBEC, or Recovery mode). Error -75 specifically points to . 3utools error unable to restore idevice--75-
Hardware diagnosis:
How to Fix 3uTools Error "Unable to Restore iDevice (-75)" Seeing the error message in 3uTools can be incredibly frustrating. This error typically occurs mid-way through a flashing or restoration process, leaving your iPhone or iPad stuck in Recovery Mode or a boot loop. Check cable and ports: In the world of
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. This error typically occurs mid-way through a flashing
If your computer has older USB 2.0 ports (usually black, whereas USB 3.0 ports are blue), try using them. Some older iOS devices struggle to maintain a stable DFU/Recovery connection over USB 3.0 during flashes. 2. Update 3uTools and iTunes Components