my iphone6s was shown black screen
my iphone6s was shown black screen
my iphone6s was shown black screen
see the process below. Work all through it.
If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support
see the process below. Work all through it.
If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support
I would try a restart Force restart iPhone - Apple Support
my iphone6s was shown black screen