Running an outdated version of 3uTools can lead to compatibility issues with newer iOS versions. Check for updates in the bottom right corner of 3uTools.
Error -75 is frequently caused by a physical connection drop. Even if the cable looks fine, it might not be maintaining the data transfer speeds required for a full restore.
3uTools provides a guide for your specific model on how to enter DFU mode under the section. 5. Check the IPSW Firmware File 3utools error unable to restore idevice75 link
Avoid using USB hubs or front-panel ports on a PC. Plug the cable directly into the motherboard ports on the back of your computer.
If you are getting the error while in standard Recovery Mode, try switching to . Running an outdated version of 3uTools can lead
Alternatively, download the IPSW file directly from a trusted source like ipsw.me and use the button in 3uTools to select it manually. 6. Update 3uTools and iTunes
Select . This will reinstall the necessary Apple drivers without requiring a full iTunes reinstallation. 3. Disable Antivirus and Firewall Even if the cable looks fine, it might
Sometimes, security software flags the restore process as a suspicious data transfer and "cuts the link," leading to Error -75.