Split face on phone how to fix it

[Android Central Question]

How to fix it

 

[Rukbat]

A face is split? Or the screen is split? If the screen, one app is split somehow? Or you have two apps on the screen at the same time? (If it's the last one, keep hitting the back button until you're back at a single screen.)

 

[B. Diddy]

Welcome to Android Central! It'd help to know which phone you have.