In olden times, there were no mobile phones. For serious!
These were halcyon days, before Bindi Irwin was born, when you had to walk into a bank to get money out for the weekend, and when having a Down's Syndrome baby was a surprise every time. Everyone was high on Liquid Paper and high jeans, and Kathleen Turner wasn't an overweight man. Good times.
Movies and television shows were still made back then, although downloading them meant tipping your television out of a wheelbarrow. Lots and lots of movies were made that didn't have mobile phones in them (although unfortunately some of them did include Kathleen Turner). If mobile phones had been around, a lot of movies would be entirely different:
Picnic At Hanging Rock
Exterior: Hanging Rock and surrounds. Ringtone (Madonna's "Like A Virgin") is heard. Miranda answers.
Edith: Hi, Miranda. It's Edith. Where are you? What are you doing?
Miranda: Oh, me and the girls are just going to drop some acid, throw our corsets off the cliff, turn into lizards and crawl into a crevice. Come with?
Edith: Wait… you're dropping out.
Miranda: Yeah, no kidding.
Interior: Big ugly church. Ringtone (Simon & Garfunkel's "Scarborough Fair") is heard. Elaine answers.
Benjamin: Hi, it's Ben. Don't marry that twat.
Elaine: Stop bonking my mother.
Elaine: Awesome. See you on the bus.
Interior: Room decorated with red velvet and palm trees. Ringtone ("I'm Dreaming Of A White Christmas") is heard. Tony answers.
Gina: Hi, Tony. I'm gonna marry Manny, 'kay? So don't shoot him or nothin'.
Tony: Thass okay. Say hello to my leedle friend.
Gina: Sure! Put him on.