- Jul 19, 2015
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Every time I unlock my phone, a red light flashes at the right of the Nokia logo (maybe a sensor). I don't know why, can someone tell me what does it do?
Probably the proximity sensor.
I see a flashing red light on my 640, on the right side if the front camera, but not when unlocking its when the screen is offCan't promise anything, but it may just be checking to make sure you didn't somehow pocket-unlock. I'm not seeing that behavior on my 640 though.