Iphone 6s gets stuck in Apple logo
I have an old iphone 6S that somehow got suck in the Apple logo.
I don't have a backup to restore and I followed the instruction to update the phone SW. 'm OK getting this phone back to factory settings.
However, I either get an error code 9 or error code 4013
Any idea what I can do to get this phone back working?
iPhone 6s, iOS 15