This is the most frequent cause. If a cable isn't MFi-certified or has internal fraying, it can drop the connection the moment the restore process puts a high load on the data transfer.
A: Possibly. If you use "Retain User Data" flashing (iTunes Update mode), you might keep data. However, if the error is caused by filesystem corruption, a full restore (wipe) is the only fix.
Use Recovery/DFU modes correctly:
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).
This paper examines the error message "3uTools error unable to restore idevice--75--" encountered by users of 3uTools when attempting to restore or update iOS devices. It synthesizes probable causes, diagnostic steps, and practical fixes based on how 3uTools, iTunes/Firmware restore workflows, and Apple device restore mechanisms operate. The goal is to provide a comprehensive, actionable resource to help technicians and advanced users identify the root cause of the error and successfully complete device restores while minimizing data loss and device risk.
Temporarily disable or third-party antivirus (like Avast or Norton).