I disguise myself as a civilian every day in an unmarked vehicle and I observe so many uses of phones behind the wheel that they’re difficult to count...
I remember one guy making a left turn at a busy intersection with his right hand holding his phone up to his ear. He even took the time to look back at the ass of a shapely woman crossing the street.
Years ago I saw a woman doing a crossword puzzle on her steering wheel while waiting at a light.