Flat black circles on top of traffic signal control boxes, which are large, gray or painted metal boxes, typically found at street corners.

  The Acyclica device casts a fake Wi-Fi network and tracks phones that try to join the network in passing cars. Since each phone has a unique identifier …, different Acyclica installations can track your personal location as you pass them in the city.

Is iOS latest susceptible on default settings? w/“Rotating” “Private Wi-Fi Address“