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I tried to restore my iPhone 6s, but the iPhone restarts at about 50% and automatically goes into recovery mode. The recovery fails with the error: "The iPhone" iPhone "could not be restored. An unknown error has occurred (9).". My iPhone also no longer starts normally, but jumps into recovery mode without pressing the buttons. I've tried several lightning cables. To restore it, I tried iTunes and 3utools on multiple computers.
iPhone 6s
First, reboot your computer and iPhone
Make sure all virtualization apps like Parallels or VMWare are closed as these apps might interrupt the computer’s ability to communicate via USB, especially if they are not configured properly, or outdated.
If there are some security software or anti-virus apps, firewall on your computer that can block access to the Apple servers, try to disable these tools temporarily.
Sounds like you have jailbroken your device, since you cannot downgrade software on the iPhone. Older versions of iOS are no longer signed for activation and would not work. And a restore from backup does not restore and older version of iOS.
I now solved this issue by recovering my iPhone with an old version of ios
Thank you for your help
Like I said, I tried to recover on multiple PCs without virtualization apps or VMWare. I also disabled windows firewall and anti-virus apps. Downloading the drivers didn't work either.
iPhone recovery not working
