If you are on a laptop, ensure it is plugged into a wall outlet. Cable Integrity:
Error code patterns such as “--75--” are not formally documented by Apple nor 3uTools; they are diagnostic markers emitted by 3uTools mapping to a particular failure stage. Similar numeric error patterns in restore tools often point to USB/communication interruptions, timing issues, or low-level device responses indicating that the restore operation aborted. 3utools error unable to restore idevice--75-