The means of communication would include pneumatic mail tubes, telephones, telegraphs, radios, and mechanically composed newspapers. -- Howard P. Segal, The Technological Utopians, in Joseph J. Corn (Ed.), Imagining Tomorrow: History, Technology and The American Future (Cambridge: MIT Press, 1986).
The magnetic interference can also cause problems with NFC performance on the new iPhones, and Apple has now started warning manufacturers in its MFi program with accessories supporting the devices to avoid magnets or metal.
AMPS cloning. Analogue mobile telephones were notorious for their lack of security. Casual listeners easily heard conversations as plain narrowband FM; eavesdroppers with specialized equipment readily intercepted handset Electronic Serial Numbers (ESN) and Mobile Directory Numbers (MDN or CTN, the Cellular Telephone Number) over the air.