Front camera on iPhone 5c has stopped working?

The front camera on my phone has stopped working.

Sometimes it's just a black screen, other times it's a frozen blurred image.
Bottom line is, I can't take pictures using the front camera.

How can I fix this?

This really is clearly the hardware malfunction that should be fixed or exchanged. The truth that numerous iPhone users upon that Message board thread have observed exactly the same concern is dubious, indicating the hardware downside.
You might recall which some early apple iphone 5 models additionally had loose battery packs that could jiggle about in the apple iphone enclosure and create noise. Therefore it may not surprise me personally if a digital camera was also reduce on some versions. Countless this stuff get created, several thousand will certainly have imperfections.