Hidden led lights that are seen only by camera on my 3 adroid devices I accidentally found something hidden on the main screen of my android devices. 1-4 blinking led lights that canot be seen with the naked eye but can be seen using the camera app. The location color and intensity of hidden lights vary phone to phone. Can anyone tell me what they are for? Ifound nothing in searches.
Those are proximity sensor and  light sensor they emit infrared light that's why you can't see them with nacked eyes. They are located near the top area of the front side of the phone. More can be read here