They said: “Mr Watson, come here, I want to see you.”

What this question usually refers to

When people ask “what did they say on the first phone call” , they are almost always referring to the very first successful telephone call made by Alexander Graham Bell to his assistant Thomas Watson on 10 March 1876. During that lab test in Boston, Bell spoke the now-famous line, and Watson, in a nearby room, heard the words clearly through the experimental telephone.

Why this line is famous

  • It is widely quoted in history of science books as the first intelligible sentence transmitted over a telephone.
  • The phrase has become a symbol of the birth of modern voice communication technology.

Other “first phone calls” people mean

Sometimes “first phone call” might instead refer to other milestones:

  • First mobile (cell) phone call: In 1973, engineer Martin Cooper called a rival at Bell Labs from a handheld Motorola prototype on a New York street.
  • First UK mobile call: On 1 January 1985, Michael Harrison rang his father, Vodafone’s chairman, saying something like “Hi Dad, it’s Mike. Happy New Year. This is the first ever call on a UK mobile network.”

If you meant a different “first phone call” (for example, the first call between two specific people, or in a TV show or forum story), share more details and it can be narrowed down.