Physical damage or degradation to the device's storage chip can prevent the firmware from being written properly.
Use an original Apple cable or a high-quality MFi-certified one.
Before applying a fix, it is essential to understand why 3uTools terminates the installation process. Error -75 surfaces due to three primary bottlenecks: 3utools error unable to restore idevice--75-
In common parlance: Your computer and iPhone are speaking different languages, or your iPhone’s storage area is refusing to accept the new data.
A: If you're still encountering issues, seek assistance from online forums, professional support services, or the 3uTools community for further guidance and support. Physical damage or degradation to the device's storage
If you're using a beta version of 3uTools or a specific feature (like "Easy Flash"), try a standard restore or use iTunes to see if the issue persists.
Launch on your computer and make sure it is updated to the latest version. Error -75 surfaces due to three primary bottlenecks:
If the device power-cycles unexpectedly during the flash, it will trigger error -75.
Disable interfering software: