The bars drop to one, then to none, and the car goes quiet. Somebody checks their phone anyway, out of habit, and puts it straight back down. Most travel advice skips this part of the drive, because the honest answer is that almost nothing on a phone survives it. Streaming stops. Anything that generates something new stops. What is left is whatever you thought to bring and the people sitting next to you, and that turns out to be plenty once you know which things still work. This is a guide to the games that hold up with no signal, including the ones that need no phone at all, and what MileSmile keeps on the phone so it can carry on talking through a tunnel.

What stops working first

It helps to know what you are losing before you lose it. Streaming goes first, usually before the bars do, because video degrades while the connection is still technically alive. Music follows unless the album was downloaded. Maps keep showing your blue dot from GPS, which needs no mobile signal at all, but they cannot fetch a new route or a new tile, so a wrong turn in a dead zone is a wrong turn you keep.

The category people forget is anything that thinks. Every app that writes you a question, a summary, a joke or a route suggestion is sending your request to a server and waiting for the answer. With no signal there is nothing at the other end, so those apps do not degrade gracefully. They just sit there.

Which leaves two kinds of entertainment that survive: things that live entirely in people's heads, and things that were copied onto the phone before you left.

Games that never needed a signal

These cost nothing, work at any age mix, and have kept families going since long before mobile data. They are worth knowing properly rather than half remembering.

Twenty questions

One person thinks of a thing. Everyone else gets twenty yes-or-no questions to find it. The trick that makes it good rather than tedious is agreeing the category first, so a five-year-old picking "an animal" and a teenager picking "a concept" are playing fair. Good early questions narrow the field by half. Bad early questions guess.

The alphabet game

Pick a category, then go round the car naming something in it starting with A, then B, then C. Food, countries, bands, things you would find in a hotel room. The letters do the work of making it hard, and it ends naturally at Z instead of dragging.

The story chain

One sentence each, round and round, building a single story. The rule that saves it is that nobody may kill a character or end the story, so the pressure stays on inventing rather than on shutting the game down. Ten minutes of this with a seven-year-old produces something you will still be quoting at dinner.

Categories

Name a category and a letter. Everyone has to produce something in that category starting with that letter before the count of ten. Fast, loud, and forgiving, which is why it survives the fourth hour.

Number plates and road signs

Collect regions, or letters, or make a word out of the last three characters. It is the oldest car game there is and it works because the raw material keeps arriving whether you want it to or not.

Where the no-phone games run out

They all have the same weakness, and it is worth being blunt about it. Somebody has to host. One person has to remember the rules, keep score, decide who goes next and restart the game when it stalls, and that person is doing a job rather than playing.

In a car, the person most likely to end up hosting is the one who cannot look at anything. Drivers are usually the ones who know the games, so the driver narrates while everyone else plays, which is a slightly sad arrangement over four hours. Add a couple of children with a five-year age gap and a hosting job becomes a refereeing job.

The other failure is repetition. Twenty questions is excellent three times and thin by the tenth, because the family that plays it every trip has a well-worn set of answers. Novelty is the thing a group cannot manufacture from inside itself.

What a phone can still do with no bars

Everything a phone can offer in a dead zone was put there earlier. That is the whole rule, and it is why the prep matters more than the app.

Downloaded music and podcasts work. Photos work, and an old album is a better conversation starter than most things designed to be one. Offline maps work if you saved the region. Ebooks work. And a conversation game works, if it saved its questions to the phone in advance instead of fetching fresh ones from a server as you play.

That last one is the gap in this whole category. Search for games to play with no wifi and you get solitaire, Sudoku, 2048 and a hundred other ways for one person to pass time alone. They are fine. They are also the opposite of what you want in a car with four people in it, where the problem is not that anyone is bored on their own.

How MileSmile plays with no signal

MileSmile is a conversation game. It asks the group a question, someone answers, the rest argue about the answer, and it asks another one. To make that survive a dead zone, the questions have to already be on the phone, and if you want them read out loud, so does the voice.

So offline mode has two levels rather than one switch. Text saves the questions, so you can read them off the screen with nothing in the sky. Audio saves the questions and their recorded voice, which is the level that keeps Car Mode working: the app reads each question aloud and the driver moves to the next one with the buttons on the steering wheel, eyes forward, phone face down in the cupholder.

For a topic you made yourself, you set how deep to go. The app keeps between 20 and 100 questions ready, in steps of ten, and shows you a ring filling up as it saves them. For the ready-made decks it is simpler, because a deck is a fixed set: you download the whole thing, and you can keep up to 25 of them on the phone at once.

Audio is the part that takes room, so the app is direct about it. Where it can it tells you the rough size before starting, and Settings carries a row showing about how much space the downloaded audio is using, which clears the lot once you confirm. Deleting the audio leaves the saved questions alone, which is the right behaviour when you are clearing space at an airport gate.

Which parts are free

Downloading a ready-made deck's questions costs nothing. Keeping your own topics saved offline, and downloading the voice so Car Mode reads to you with no signal, are part of the paid plan. That is worth knowing before you plan a trip around it.

What still needs a connection

Being straight about the limits is more useful than a feature list.

The microphone button needs a signal. Tapping it and saying which game you want, or naming a new topic, or creating a team, all go through a server, so in a dead zone you pick from the screen instead. There is no wake word and no voice command for next or repeat during play, in or out of coverage.

Brand-new questions for a topic you never prepared need a signal too, because they are generated. And saved questions are a finite pile: play long enough through a genuinely long dead zone and the app tells you that you have reached the end of what it saved, and asks you to reconnect for more. The fix is not clever, it is just remembering to set the count higher before a long empty stretch.

What works where

The five minutes that decide the drive

All of this collapses into one habit. On the night before, or in the car park with the engine running, open the topic or deck you actually intend to play and switch it to audio. Let it fill while you load the boot. Before you pull away, check the row is not still telling you that some audio is missing.

Do the same for the music, the maps and one film for whoever is in the back. That is the entire preparation, and it is the difference between a dead zone that goes quiet and one where somebody is halfway through explaining what they would take to a desert island.

Then let the signal go. The best two hours of a long drive are usually the ones where nobody could have checked anything anyway.