I dislike alarmist stories like this. Of course cell phone companies know where your phone is pretty much all the time. The phone wouldn’t work otherwise.
This is not the same, though, as knowing where YOU are. We are not our phones.
Amazingly enough, it is possible to set your phone down and go somewhere else without it. People used to do it all the time, I’ve heard. As such, the records held by cell phone companies are of extremely limited usefulness in tracking anyone with a brain, especially if you consider the ease by which pay-as-you-go- phones and the internet can be used for anonymous communications, to name two easily accessible alternatives.
It is also possible, believe it or not, to turn your phone off from time to time, or, even, to place it in a so-called ‘flight mode’ or ‘airplane mode’ that disables cellular transmission.