What's wrong with my front camera on LG Optimus G Pro?

[AC Question]

The front camera on my android phone doesn't work. My friend has the exact same phone and his DOES work . Can someone help me ?!

 

[B. Diddy]

Welcome to Android Central! What happens when you try to switch between the rear and front facing cameras? Do you get an error? Does nothing show up? Do you even have the toggle button available in the Camera app?