I had a cell phone for one day...
...and, like the series 80 FPS parts, I threw it in the bay.
I will never own a cell phone. My LCPO told me I had to get one, and I told him he could put me on his plan, and pay the bill in his name, and hand me the phone, and I would leave it in my desk at work. I took the EDR out of my cars and truck, and all the "wireless" connections out of my computers.
Unless you were unusually motivated, you'd have a hard time tracking me and mine. I haven't even got a cordless phone.
Hell! My paintball team uses scrambled bone-resonence voiceducers. Nobody spies on us!
I am concerned more about getting the chip involuntarily through a vaccine or PPD test. I watch carefully, but I doubt I'd know if they did it during my "flu shot" every fall. (another one I have refused 8 out of nine times)
Like I said, they'd have to be unusually motivated.