In 3uTools, the "Unable to restore iDevice (-75)" error typically indicates a communication or hardware-level interruption during the flashing process. It often points to insufficient power delivery, faulty connection hardware, or software interference. Common Causes
Change USB Ports: 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. 3utools error unable to restore idevice75 link
or iTunes (ensure it is the version from Apple's website, not the Microsoft Store). Apple Support Community ERROR: Unable to restore iDevice(-75). - Apple Community In 3uTools, the "Unable to restore iDevice (-75)"
DFU Mode: If a standard restore fails, put your device into DFU (Device Firmware Update) mode and try flashing again. This performs a deeper reset. In 3uTools, go to Flash & JB > Easy Flash