In the age of the Internet, one should never, at least theoretically, have to rely upon that ancient technological device, the land line, again. Everything in the world, and some things not of this world, for instance, the voice of Siri — the digital polymath who will tell you how to conduct a burial of your recently murdered family member; where to find a divorce attorney or a hot fudge sundae in Bangalore; and will demur politely if asked questions of a more delicate sort, such as, “How do I tell my mother-in-law that she has halitosis?” — is available online, as distant as the click of a mouse or the brush of a fingertip against the glass screen.