[decimon]

Be mindful of this and don’t take your phone with you while you are going to a location that you don’t want someone - anyone to know.

What if you frequent legitimate establishments in proximity to illegitimate ones? Might someone draw inference from that?

[bitterohiogunclinger]

I always send my cellphone in the opposite direction whilst I’m engaging in illicit journeys. It took a while to train it, but was worth the effort.

[taxcontrol]

Or suppose that at the time in question, your phone is somewhere else and your PC calls your number and someone else answers it. Might that be “cover”?