Why is there a red light on my iPhone 5c?

There's a tiny red light on my iPhone 5c near the earpiece and front camera. Why and what is it?

Dunnu!

Spies are watching and recording you. Oh wait, no, that's simply the proximity sensor that detects when you have your ear to the earpiece.

That's not a light. That's one of the sensors & it is reflected in light which is why it may look like a light, but again it is not. Could be the ambient light sensor which is what auto dims the display or it could be the proximity sensor which is what turns the display off when using the phone feature.

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