This might help explain why your grandparents can’t figure out how to use that gosh darn smart phone. Back in 1936 they needed an AT&T newsreel to tell them how to operate the “new” dial telephone. It features a young girl doing the demonstration as an announcer walks you through it. He explains in great detail how to recognize a dial tone, a ringing signal, and a busy signal. He even tells you how to dial each numeral.