Lumia 520 red light while making/receiving calls

I noticed there is a small red light blinking on top of screen just near the speaker, where you hear the voice while calling. This happens while making/receiving call, a small red light blinks/stays on near speaker.
Sometimes the light goes off when i press the lock button while making calls.
Solved!
Go to Solution.

Hi Joi7,
Welcome to the forum!
What you're seeing is the proximity sensor of the device. This will activate once you receive or make a call. The main purpose of the proximity sensor is to disable the screen whenever you put the phone near your ear. This is to prevent you from accidentally disconnecting the call. This also works just by covering the sensor using your hand or any object. This feature is available to all other Nokia touch screen devices. Hope this helps. Let us know if you have another concern.

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