Before mobile/cell phones became so prevalent, my son answered our home phone. It was a friend of his on the other end who in mid chat asked my son "Where are you?" To which my son (eyes rolling in exasperation) replied, "I don't know, what number did you call?"
Last week I counted 17 people on mobile phones on my 5 minute walk in and out of shopping mall to our car. It was after 5pm so the shops were about to close and not many people around at all. But 17 had phone glued to ear. Well 2 were talking using bluetooth head set.