Iphone 11
I dropped my phone outside in the 29 degrees weather and my phone screen is fully black and will not work
and it also has lines going across the screen .
iPhone 13 Pro Max, iOS 17
I believe the technical term for what happened is “it broke”.
Make an appointment at the Genius Bar of your local Apple Store or take it to your local authorized service provider and have it checked. They will explain your options.