A magnetometer detects the direction of magnetic north and, in conjunction with GPS, determines the user's location.
So, a magnetometer detects your location within 2 to 3 feet anywhere on earth with your cell phone. So, anyone with this information could come to this location and kill you by any means they thought necessary.
So, this is something to think about when you carry around a cell phone or smart phone on your person anywhere on earth.
However, it is important to note Cell phones and smart phones are a weapon. They are sort of like carrying a gun in many ways and I see them as better than carrying a gun for self protection.
Often if you just hold one up to your head and pretend to talk on one this protects you from assailants who are afraid you might identify them to whoever you are talking to so they would be found out eventually and put in jail or executed. So, in this sense a Cell phone is BETTER than a gun in keeping you safe in most of the world.
However, it is also important to know that your cell phone cannot make calls without this GPS locator working. Because it could never connect the phone calls without GPS technology while you are moving from place to place around the world.
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