We bet you've noticed it before. And we bet you've wracked your brain to work out its purpose, before giving up and accepting it as just another unknowable part of the universe.
Well finally the secret behind its meaning has been revealed – and we're here to fill you in. That little hole isn't actually anything to do with the camera, it is a teeny, tiny microphone.
Before you go into meltdown, thinking secret spies have been eavesdropping on you, it is actually there to help.
The little mic has been positioned on the back of your iPhone to help improve the overall quality when using apps such as FaceTime. The designers at Apple thought people might hold their phone in a slightly obscure way.
This mic is one of three and has been on all iPhones since the 5S model was introduced, but it is only now that people are finally discovering what it is for.
Nifty, right?
