If you've gone through extensive troubleshooting and still see an error, then you should contact Apple support for more comprehensive hardware troubleshooting options.

What Causes iPhone Error 4013 Could Not Restore? iPhone Error 4013, also known as "The iPhone could not be restored. An unknown error occurred (4013)," can be ...

No need to be worried about your iPhone as Dr.Fone is here to help! Are you having issues with your iPhone? Maybe you're having problems troubleshooting its iOS system, removing the iPhone stuck ...