I think you are wrong about the telephone. Early adopters included the rich, but the real go-getters were doctors (who gained greatly in efficiency in the days of house calls) and dry-goods merchants. Not poor, but hardly to be counted among the overprivileged.
And cowboys. At the XIT, the world's biggest ranch, cowboys carried handsets in their saddlebags with magnetos. They would hook them to the barbwire and were able to shout simple messages back to the ranchhouse. The first mobile phones, and these were adopted at least as early as, if not earlier than, the installation of phones in mansions.
~ Harry Eagar