[Yo-Yo]

Later that year, on November 18, 1963, Bell Telephone officially rolled out push-button telephones to the public. A push-button interface meant customers no longer had to wind a rotary dial and wait for it to spin back when dialing each number.

And ushered in the era of "phreaking."

2600, man!

[ProtectOurFreedom]

"Phone Phreaking" -- there's a direct connection from direct digital dialing to our latest Apple devices...The Definitive Story of Steve Wozniak, Steve Jobs, and Phone Phreaking by Phil Lapsley, February 20, 2013, The Atlantic. It all started when Steve Wozniak happened to pick up a copy of Esquire from his mother's kitchen table the day before starting classes at Berkeley in the fall of 1971.

[Dr. Sivana]

So did you use a Cap’n Crunch whistle or a Commodore 64?

[Rebelbase]

2600 published a phone booth photo my son took in the Bahamas around 2000 or so.