I get unknown error code 9006 every time I try to update my XR and my 7 through iTunes I have to download over wifi to each device to get update. Why doesn't iTunes work properly. I also have 2 iPad pro's with same issue.
Whats the fix for unknown error code 9006 updates through I tunes. Isn't the whole idea with Apple is to update through your iMac if you have one to save all data from phones?
iPhone XR