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Anime And Manga
- Averted in Dragon Ball. Future Trunks remarks that the GPS in his watch is not functioning properly because the satellites it is supposed to rely on have not been built yet. However, he can make it work on an older type of satellite.
- In the Mega Man NT Warrior manga, Lan and Megaman.EXE discover an ancient ruin on the internet that belongs to a civilization that existed upwards of thirty thousand years prior to the story, maintained by a being called Pharaohman; keep in mind that it takes place somewhere in 20XX.
- Implied vaguely throughout Digimon.
- Outright stated in Digimon Xros Wars, but it isn't certain if this confirms it for any of the other Digimon installments.
- No Game No Life: whatever is keeping Sora and Shiro in Disboard is also powering their technology - they never have to charge their smartphone or tablet. It's implied that whatever gave the Old Gods their divinity is technological in nature, so that makes sense.
- Lampshaded in Axis Powers Hetalia when America takes out his laptop to check Google Maps... in 1942.
England "We can't Google stuff in 1942, you asshat!"
- The protagonist of the My Little Pony: Friendship Is Magic fic Through The Eyes Of Another Pony discovers that his smartphone still has internet access in another world, completely inexplicably. To the author's credit, at least it's not just there solely for coolness; the Internet access is used to jump-start a plot peripety, and then disappears.
- The Elements of Harmony and the Savior of Worlds also uses cellphone-signal-in-Equestria as a plot point, as it turns out that radio signals are capable of passing through the Rainbow Bridge from G1, which Twilight and Rainbow Dash accidentally reopened in Chapter 1. (Long Story.) It turns out that this works both ways, and people in Kentucky can now pick up Equestrian local radio, throwing a large wrench into Megan's plan to make the general public aware of the fact she has a doorway to Another Dimension in her backyard in a somewhat controlled manner.
- The "mirror net" in Empath: The Luckiest Smurf is basically the medieval Europe fantasy version of the Internet using magic mirrors. In "Smurfette's Inner Beauty", Hogatha uses a social network called Magebook in order to find a date.
Films — Live-Action
- Whoopi Goldberg's character in the TV film A Knight in Camelot could access the Web while in The Middle Ages. This doesn't even get into the lack of electricity...
- Lampshaded in Enchanted. Shortly after Nancy goes to Andalasia, she gets a call on her cell phone. She says, "Rather good reception here," then throws it away.
- Suggested in The Smurfs 2 that the Web existed as far back as medieval Europe, with Social Smurf talking about a social network called Smurfbook.
- Inverted in Dirk Gently's Holistic Detective Agency, where the telephone never works, except when the apartment containing it is in another place or time. Of course, the person at the other end is always in the "present" that the apartment left. Also, when the phone is finally repaired, the time machine stops working.
- Seen literally in Macroscope, where the great information network kills anyone advanced enough to read it and primitive enough to still have violent tendencies, as a way of keeping the AOLers out of Usenet, as it were.
- Somewhat averted in the Axis of Time series by John Birmingham. Computers on the task force of warships from Twenty Minutes into the Future that arrives in 1942 are limited to whatever websites were stored in their local cache memories. Which, however, is pretty much anything the plot demands.
- Leading to a scene where Stalin berates his subordinates because they're citing "old Wikipedia articles" when he wants up-to-date information.
- They are able to use futuristic tablets to send and receive messages. However, this is because they don't rely on an outside network and instead rely on Quantum Mechanics Can Do Anything.
- Inverted in the Harlan Ellison story "Jeffty is Five." The title character has Psychic Powers that the viewpoint character at first thinks allows him to modify radios and television to pick up shows from the '30s and '40s. Then he notices that they are new episodes of those shows, that is, they are episodes that theoretically would have been produced had the shows survived to the present day. Jeffty also gets new issues of defunct magazines and comics in the mail with new stories written by long-dead authors.
- Averted in the Michael Crichton novel Timeline. A character mentions that if they would have brought a TV or computer back to the times of the Hundred Years War, there would be no signal to receive and no electric current to power any of them.
- In The Company Novels, the eponymous Company maintains operatives at most periods of human history and allows them considerable leeway and cheap comforts (albeit because their nominal administrators lack the subjective time or understanding to know most of what the operatives are doing). As a result, communication technologies such as radio and broadcast TV tend to be widely used throughout human history right up to the point where they get invented and regular people could start noticing them, and the broadcasters have eclectic tastes. No Internet (no need), but any outside time-travelers who brought a radio or TV along would likely be picking up modern programs for any definition of "modern".
- Inverted in one Dave Barry column, where he talks about his car's radio being so old it played Winston Churchill speeches.
- Played with in The Future of Us by Jay Asher and Carolyn Mackler. Josh and Emma are friends who load AOL onto their computers in 1996 and lo and behold, Facebook is their homepage.
- In James Blish's novella "Beep", every message sent by Subspace Ansible is preceded by the eponymous annoying noise. The space patrol figured out that the beep comprises every message that has ever been — and ever will be — sent, in a very compressed form. Which accounts for that service's remarkable record of effectiveness.
Live Action TV
- The Doctor in Doctor Who managed to make an ordinary Nokia 3200 cellphone capable of calling through time. Possibly justified by the TARDIS acting as a relay station. No word yet on what the roaming charges are...
- Parodied in The Young Ones when the house travels back in time to the Middle Ages and the TV is showing Jester Balowski's Medieval Torture Hour.
Jester Balowski: We'll be right back after this break. (He breaks the contestant's arm.)
- Parodied on the Venezuelan sketch show Radio Rochela where a character travels to the 19th century and tries to use her cellphone. The response? An automatic voice saying "We sorry, but the reception is unavailable until the next century."
- Subverted on Supernatural with both cell phones and the Web.
- Inverted on Eerie Indiana—one of the weird things the main character collected over the course of that series was an old-fashioned radio that only played music from the 1940s.
- The entire premise of the educational series Newscast From The Past, with each episode giving a dateline from sometime in the Middle Ages, and complete with "commercial breaks" advertising things that would have been in vogue at the time (although they still subscribed to the idea that Europe demanded spices to cover up the taste of bad meat).
- In a remarkable pre-Internet example (at least what seems to be an example of this trope), in the Star Trek episode "City on the Edge of Forever", Spock, using what he even refers to as "stone knives and bearskins", is able to access newspaper clips and VIDEO (well, film footage) of two different histories (which are futures from 1930) with his tricorder!
- According to Heroes, the internet has not only always existed, but is sentient.
- The premise of the historical tv skit series History Bites is "What if Television had been around for the past 5000 years?", and gleefully mixed historical information with modern pop culture, such as Martha Stewart's advice on how to use pot-pourri to mask the smell of plague victims.
- Averted in Journeyman, where the main character's cell phone refuses to work in the past. Instead, be finds his old phone from The '80s.
- Done deliberately on Fringe with the mysterious number stations. It is mentioned that when Marconi first activated his radio they were already transmitting.
- Played straight in comedy sketch show Armstrong and Miller. A random guy goes back in time to meet a famous inventor and gives a spiel about the enlightened future, only when the scientist starts asking questions (such as "how do these radio waves work?") he realises he doesn't know the answer. Cue "What sort of a future is this?", so he pops back to the future, brings back a laptop and shows the inventor some porn. Answer: a good one.
- Terry Jones & Michael Palin's pre-Monty Python's Flying Circus show The Complete and Utter History of Britain posited a world where then-modern TV broadcasts were made of all of history's greatest events, and how that might have played out — such as Henry V's post-Battle of Hastings in the locker room talking like it was a cricket match.
- Phil of the Future once featured a gadget called the Giggle which was said to have made the Internet obsolete. It recorded all known knowledge and was constantly updating, knowing everything up to the year Phil came from, 2121. Phil and Keely use the Giggle to look into Keely's future. At first it shows Keely with a successful career as a news reporter, but after failing a test and getting her AV lab privileges suspended, the Giggle shows a Bad Future. It reverts back to news reporter after Phil helps Keely pass another test and regain her privileges.
- Possibly the most spectacular example occurs in the Old World of Darkness setting's Mage: The Ascension game. A Technocrat faction of Magi called the Virtual Adepts discovered that the lowest levels of the Internet accidentally connected to a part of the spirit-world called the Digital Web, allowing skilled hackers to manipulate reality by sending data through the Internet.
- Note that within the setting, the Virtual Adepts manage this trope twice, as on top of discovering that the internet had its own spirit-world and so had always existed, they had in fact already invented a primitive text-only internet (roughly equivalent to Usenet) back in the 19th century. And as an aspect of the setting was that the internet as the mundanes experience it has always been a considerably backwards version compared to the version of the internet used by the VA, then if a mundane went back in time to WW1 or WW2 with the right equipment they might have full access to an equivalent of TV Tropes. Or their equipment would explode from Paradox. Or it wouldn't work. We don't recommend you test it.
- In the Xenosaga series, the futuristic internet (the Unus Mundus Network) had always existed but could not be accessed until a network was layered onto it. The Unus Mundus ("one world") Network is some sort of hyperspace/collective unconscious/something network that's always existed, but they hadn't started using it for FTL web browsing until relatively recently. There's no implication that you could go back in time to see data from the future. It is also God and represents the theory of a universal collective unconsciousness.
- Played dead straight in Sly Cooper: Thieves In Time. Not only is Bentley able to access the internet on his computer no matter how far back in time the gang goes, but much like Dr. Who, the Grizz, who has traveled back to 10000 B.C, is able to talk to le Paradox back in the present using a cell phone. Likewise, Dimitri, back in the present, is able to contact the gang no matter how far back they go.
- Hand Waved in We're Back! A Dinosaur's Story.
- Inverted in The Simpsons; when Lisa sets up Grandpa's old radio in the living room and turns it on, it plays the Glenn Miller Orchestra and FDR's "infamy" speech.
- Averted in the Futurama episode "Roswell That Ends Well," where upon being sent back in time to 1947, the Planet Express ship crashes because the satellite network that it relies on around Earth to navigate doesn't exist yet.
- Also in an inversion of this, their chronometer, that should work fine in the past, is turned into a pin-up calendar.
- Happens a few episodes of Time Squad with both internet and radio.
- In the DuckTales episode where Bubba the Caveduck has his debut, Huey, Dewey and Louie introduce him to rock'n'roll. By bringing a radio into the stone age.
- Some versions of Liberty's Kids include short news reports — television news reports — delivered by Benjamin Franklin (voiced by Walter Cronkite) as a Framing Device.
- The iPhone in The Way of the Metagamer works perfectly within the Medieval world of Dungeons & Dragons.
- Inverted in Homestuck. The entire planet is destroyed by meteors, the homes of the SBURB/SGRUB players are transported into the game itself, and yet the Internet still works fine.
- mezzacotta has apparently been going for over ten million-million years note .