why is my phone all white and have a black line in the middle?

[iMore Question]

my phone crashed tonight, I was on an app calling one of my friends and it froze and my phone went all white and has a black line close to the middle of the screen. what happened and how do I get it to come back on?

 

[Rob Phillips]

Welcome to iMore! Reset your device by holding the power button and home button down simultaneously until you see the Apple boot logo. If that doesn't work please join the forum and reply in this thread.