Infrared cell phone or smartphone sensor

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• An infrared sensor can be used to identify user movements for gesture recognition.

This is used to make sure you are you. So, the person (government or criminal) worldwide would use this sensor to know that it is you (rather than another person using this phone). So, they have two ways to know whether it is you using this phone. First is the fingerprint sensor if you use one on an Iphone to open your phone for use instead of a password or number and 2nd is this infrared sensor that detects similar types of movements that a single person often uses.

Everyone moves differently so this would be a way for governments and criminals to detect who exactly has this phone in their possession at this given moment at what location here on earth.

They don't have to put a chip in you to find out where they are like you do your dog or cat for someone to know who they are so you can re-locate lost pets at the SPCA when their dog or cat tags get lost and animals run away. Instead of putting a physical chip in you like they do U.S. Soldiers now on the back of their necks, they use your cell phone as your chip locator instead.

So governments learned well from UFOS who have been chipping people for thousands to millions of years already when they visited here from other times and places.