When encountering the "3utools error unable to restore idevice--75-" issue, it typically indicates a problem during the restore process of an iDevice using 3uTools. This error can occur due to various reasons such as:
Try iTunes restore — if iTunes succeeds, use it; if it fails with an Apple error code, use that to target troubleshooting (e.g., 14 — USB issues, 9/4013/4014 — hardware/communication). 3utools error unable to restore idevice--75-
"It's a Solder bridge issue. Take it to an electronics shop and they'll reflow the solder" Facebook·Asta Staria ERROR: Unable to restore iDevice(-75). - Apple Community When encountering the "3utools error unable to restore