3uTools offers different flashing modes. Quick Flash is faster but less thorough. Pro Flash uses a different verification method.
Understanding exactly why this process fails helps target the correct remedy. Error -75 indicates a critical breakdown in communication right before firmware execution begins. The most common structural causes include: 3utools error unable to restore idevice--75-
Corrupted system drivers can trick the host machine into misreading the device. 3uTools offers different flashing modes
Corrupted physical memory or an inability to update the NAND firmware can block 3uTools from executing the restore script. 3utools error unable to restore idevice--75-
In Apple's internal error mapping: