Guide
Internet at the airport: free Wi-Fi, local SIM or eSIM
Internet at the airport you fly from, during a layover and right after landing: what free airport Wi-Fi can’t do, how to get online without SMS and what not to do on an open network.
Internet at the airport comes in three kinds: free Wi-Fi behind a login page, a local SIM from a desk in arrivals, and mobile data you switched on before you left home. The third is the most predictable: an eSIM installed before departure works the second you turn off airplane mode, whether or not the airport’s portal likes your phone number. Airport Wi-Fi almost always wants an SMS code, an email or a boarding pass, and a SIM from the desk takes a passport and time in line.
Is there free Wi-Fi at the airport, and what are the catches?
Nearly every major airport has free Wi-Fi, but free here means no charge, not no conditions. To get online you normally sign in on a separate page — the mechanism is called a captive portal. Terms vary by airport and change over time, and you find them out on the spot.
- SMS sign-up: the portal asks for a phone number and texts you a code. While roaming, that text can be slow or never arrive.
- Time limits: sessions run for a set period, after which you have to sign in again.
- Login page and captcha: until you open the portal in a browser, your phone thinks it’s online while no data moves.
- Congestion: at peak hours, and during delays, thousands of people share one network.
- Zones: the network airside, in arrivals and at the parking garage can differ, and you may have to sign in twice.
A common scene: your phone joins the airport network, the Wi-Fi icon is on, and nothing loads. That usually means the sign-in page didn’t open on its own: open any website in a browser, and if the portal doesn’t appear, forget the network and reconnect. Until you’re past the portal, mail and messengers won’t work.
How to get online at the airport without SMS
Connecting to airport Wi-Fi without SMS works in some places and not others. Some airports let you sign in by email, boarding pass number, airline account or a plain “I agree” button, and some hand out a code at the information desk or in a lounge. The mix differs by airport and changes over time.
If the portal insists on an SMS code and your number is roaming, look for a network without a login, try the Wi-Fi in a cafe or lounge, or ask at the information desk. None is guaranteed, and that’s the weakness of the “I’ll sort it out when I get there” plan: you learn the terms exactly when you can no longer change anything.
Airport Wi-Fi, a SIM from the desk, or an eSIM set up in advance
The most reliable option at an airport is an eSIM set up in advance: data comes on the moment you turn off airplane mode, with no portal and no line. Airport Wi-Fi and a SIM from the desk can work too, but they depend on conditions on the ground. Here’s how they compare.
| Criterion | Airport Wi-Fi | Local SIM from the desk | eSIM installed in advance |
|---|---|---|---|
| When you get online | After signing in on the portal | After the paperwork and activation at the desk | The moment you turn off airplane mode |
| What you need | A phone number, email or boarding pass — depends on the airport | Passport, sometimes a form and time for registration | A compatible phone and a profile installed at home |
| Lines and wait time | Usually minutes, unless the portal won’t open | Luck of the draw: long lines after night arrivals | No line |
| Local number | No | Yes | Usually no: MoreSim plans are data-only, with no phone number |
| Works outside the airport | No | Yes | Yes |
| Works on a layover in a third country | Only that airport’s Wi-Fi | No, if the SIM is for another country | Yes, with a plan for that country or a regional one |
| What can go wrong | SMS never arrives, session expires, network congested | Desk closed at night, missing paperwork | Phone doesn’t support eSIM — check that in advance |
Why you should install an eSIM at home, not in departures
Install your eSIM at home, on your own Wi-Fi, a day or two before the flight. Setting up a profile from a QR code needs a stable connection and a couple of unhurried minutes, and the departures hall offers neither. If something goes sideways, at home you fix it calmly. At the airport, you don’t.
Buying early costs you nothing: the plan starts counting from your first connection in the destination country, not from payment or installation. With MoreSim the QR code arrives in the chat in about 30 seconds, you pay with Telegram Stars from any country, right in the bot (bank card and SBP payments currently work with cards issued in Russia), and the compatibility check in @moresim_bot is also easier to run at home.
Give the line an obvious name — “Turkey”, “Egypt”, “Thailand” — when you install it. After a red-eye, a labeled line takes a second to pick instead of hunting through “SIM 2” and “eSIM”, and with a layover and several profiles the names save you twice.
What happens to an eSIM in airplane mode
In airplane mode an installed eSIM profile doesn’t go anywhere: airplane mode turns off the phone’s radios, it doesn’t remove the line. After landing you switch it off and the line returns exactly as it was, same name, same settings. That holds on both iPhone and Android.
Switching a line off and deleting the profile are not the same thing. A deleted eSIM profile usually can’t be reinstalled from the same QR code, so don’t poke at settings mid-flight “just in case”; if a profile does get deleted, contact support first rather than buying a new plan. If there’s no network after landing, toggle airplane mode once more before you start digging through menus.
If there’s still no data, check three things in order: whether the right line is selected for mobile data, whether data roaming is on for it, and whether mobile data is off on your home SIM. That covers most cases; the rest are in our guide to what to do when an eSIM isn’t working.
Long layover in a third country: do you need a plan for it?
On a layover your destination plan doesn’t work: you’re in a different country. A short connection inside the transit zone usually gets by on airport Wi-Fi, but eight hours in Istanbul, Dubai or Bangkok without a connection is noticeable, especially if you head into the city.
You have three options: make do with airport Wi-Fi, buy a separate plan for the layover country, or take a regional plan whose country list covers both the transit stop and the destination. The last suits routes with two or three countries; as of October 2026, the MoreSim catalog has no worldwide plans. The only reliable way to confirm the transit country is included is the country list on the plan card.
- The day before you fly, look at the route: where the layover is, how long it lasts and whether you leave the transit zone.
- If the layover is long, pick a plan for that country or a regional one in advance, install every profile at home over Wi-Fi and label the lines.
- Download boarding passes, bookings and a map of the transfer airport for offline use.
- After landing, turn off airplane mode and set that country’s line for mobile data; with no plan, join the airport Wi-Fi and message whoever is waiting for you right away.
- Before the onward flight, switch your data line to the destination country.
Buying a SIM card at the arrivals airport: desk, passport, line
A local SIM from the arrivals airport works well if you want a local number. Carrier desks are usually in baggage claim or just past the exit into the public area. In most countries you need a passport, because the SIM is registered to its owner. Rules depend on the country and change — check before you travel.
- Lines: after several night arrivals in a row they can be long, and your transfer may not wait.
- Opening hours: not every airport has a 24-hour desk, and red-eye flights are common.
- Paperwork: a passport almost everywhere, sometimes a form or a local address.
- Swapping cards: the plastic SIM has to go in and your home SIM has to go somewhere, and at an airport that happens on your lap.
An eSIM and a local SIM don’t get in each other’s way: the eSIM runs as a second line, your home SIM stays in the phone, and you can pick up a local card later in town. MoreSim plans are data-only, with no phone number: you can call over messaging apps where the country doesn’t restrict them, and bank texts keep arriving on your home SIM. If it’s a local number you need, a local SIM is the way to get one.
Staying safe on open airport networks
Open airport Wi-Fi is a shared network running through equipment that isn’t yours. Encryption in modern sites and apps removes most of the risk, but some remains: fake access points with lookalike names, spoofed sign-in pages and plain carelessness in a pre-flight rush.
- Don’t open banking apps or online banking — save that for mobile data.
- Don’t enter card details or make payments.
- Don’t agree to install a “certificate” or profile offered by a sign-in page.
- Don’t join a network called something like “Free Airport WiFi” when the airport advertises a different official network.
- Turn off auto-join for open networks, or your phone will latch onto lookalike hotspots elsewhere.
Rule of thumb: on an open network, read; pay and sign in to important accounts over mobile data, which doesn’t route you through someone else’s login page. If you have no data of your own at the airport, save the banking for the hotel.
If your eSIM is installed and there’s still no data after landing, MoreSim support answers via /support in @moresim_bot, a ticket in your account or email — airport Wi-Fi is usually enough for that.
FAQ
Is there internet at the airport?
Most large airports have free Wi-Fi, but almost always behind a login page that wants a phone number, an email address, a boarding pass number or just a tick box. The most predictable internet at an airport is your own: an eSIM installed before you fly works the moment you turn off airplane mode.
How do I connect to airport Wi-Fi without SMS?
Sometimes: some airports offer email sign-in, a boarding pass number, an airline account login or a simple “I agree” button, and some hand out access at an information desk. The options depend on the airport and change over time, which is why “I’ll sort it out when I land” is a weak plan.
Why isn’t airport Wi-Fi working even though my phone is connected?
Usually the sign-in page hasn’t opened by itself. Your phone sees the network and thinks it’s online, but no traffic passes until you complete the login. Try opening any website in a browser — the portal normally pops up. If it doesn’t, forget the network and reconnect.
Can I buy a SIM card at the arrivals airport?
Yes, many airports have carrier desks, usually in baggage claim or just past the exit into the public area. In most countries you need a passport, because SIMs are registered to their owner. Factor in the line after night arrivals and the opening hours, and check document rules before you travel.
Do I need data during a layover in another country?
For a short connection inside the transit zone, airport Wi-Fi is usually enough. For a long layover, or if you leave the airport, you need your own data: a destination plan doesn’t work there. Get a plan for the layover country or a regional one whose country list covers your whole route.
Should I install my eSIM at home or at the airport?
At home, on your home Wi-Fi, a day or two before you fly. Installing a profile from a QR code needs a stable connection and a couple of calm minutes, and the departures hall gives you neither. Installing early costs nothing: the plan starts counting on first connection in the destination country, not when you buy it.
What happens to an eSIM in airplane mode?
Nothing: airplane mode switches off the phone’s radios, it doesn’t delete the profile, and after landing the line comes back with the same name and settings. Don’t delete the profile “just in case”: a deleted eSIM profile usually can’t be reinstalled from the same QR code. If that happens, contact support first rather than buying a new plan.