A mobile phone

From Harriet Craig (dir. Vincent Sherman, 1950). Harriet (Joan Crawford) to her husband Walter (Wendell Corey):

“Walter, maybe you’d better not call me. Heaven knows where I’ll be from minute to minute. But I can always reach you. And if you’re not at home or the office, you will leave word where you are, won’t you?”

“I’ll carry a phone around with me.”

He could never have imagined.