Push button phones were around before the 80s. I remember using them at a relative's house in the early 70s, and they were quite common by the late 70s.
True. “Touch Tone” dialing was common place technology well before the 70’s came to a close.
Ya, I remember a rich relative that didnt mind wasting the additional 70 cents per month or whatever it was for the fancy phone. I remember it was quite the big deal in our house at the time, “the way some people throw money away.”
Touch tone was out LONG before the 80s. It did result in an upcharge on the phone bill if you elected for touch tone.