A little more than a year ago I purchased my first cell phone. Yes, I also have a home phone (used to be known as a land line). My home phone number is out there on my web site, has been for years, ever since I had NW Bell hook me up. They showed up less than two hours after I called to schedule service. But that was a holiday, so the tech apologized for the delay.
So I bought a cell two years ago so I could carry it as I get older. I supplied the number to a carefully drawn list of about 20 people, mostly family and a few important work associates. None of them ever call my android cell. But others do. I keep track, sometimes. Two weeks ago, between 8AM and 8PM on a single day my cell phone received 149 (!) calls.
To be clear, I didn't answer any of them. The recorded message assures the caller I'll return the call if they leave a name and number. They don't. The calls come from all over the world. Based on my known number, I expect them to be scams; calls about the adventures of my non-existent nephew, or brother, or aunt. Or they are advertiser calls about my expiring warranties on everything including my false teeth.
My point? When your mobile phone is in your possession, you are accessible: in your home, your office or factory floor, the hospital and your doctor's office. Yes, there are laws about privacy. Ever know anybody who broke a law?
Personally, I don't care if government or individuals can trace my movements by connecting to my GPS or my cell. My point is that privacy except in specific treated locations, is gone. That horse has left the barn. Know that and live your life accordingly.