--- title: "Buying a SIM at the airport: what to know first | Gigapass" description: "It is the old habit and it has a catch. What to ask at the counter, what to check before you walk away, and the destinations where it is a bad idea." url: https://getgigapass.com/en/blog/buy-sim-at-the-airport markdown: https://getgigapass.com/en/blog/buy-sim-at-the-airport.md lang: en site: Gigapass generated: 2026-10-24 languages: es: https://getgigapass.com/blog/comprar-una-sim-en-el-aeropuerto de: https://getgigapass.com/de/blog/sim-am-flughafen-kaufen it: https://getgigapass.com/it/blog/comprare-sim-in-aeroporto fr: https://getgigapass.com/fr/blog/acheter-une-sim-a-l-aeroport pt: https://getgigapass.com/pt/blog/comprar-sim-no-aeroporto nl: https://getgigapass.com/nl/blog/simkaart-vliegveld-kopen ja: https://getgigapass.com/ja/blog/kuukou-sim-kounyuu ko: https://getgigapass.com/ko/blog/gonghang-yusim zh-hans: https://getgigapass.com/zh-hans/blog/jichang-sim-ka pl: https://getgigapass.com/pl/blog/kupno-karty-sim-na-lotnisku sv: https://getgigapass.com/sv/blogg/kopa-simkort-pa-flygplatsen no: https://getgigapass.com/no/blogg/kjope-simkort-pa-flyplassen da: https://getgigapass.com/da/blog/kobe-simkort-i-lufthavnen tr: https://getgigapass.com/tr/blog/havalimaninda-sim-almak ru: https://getgigapass.com/ru/blog/sim-v-aeroportu zh-hant: https://getgigapass.com/zh-hant/blog/jichang-sim-ka-hant ar: https://getgigapass.com/ar/mudawana/shira-sim-matar he: https://getgigapass.com/he/blog/sim-bisde-hateufa index: https://getgigapass.com/llms/en.txt --- # Buying a SIM at the airport: when it works out and when it doesn't > It is the old habit and it has a catch. What to ask at the counter, what to check before you walk away, and the destinations where it is a bad idea. [Home](https://getgigapass.com/en) › [Blog](https://getgigapass.com/en/blog) › Buying a SIM at the airport: when it works out and when it doesn't Comparisons It is the old habit and it has a catch. What to ask at the counter, what to check before you walk away, and the destinations where it is a bad idea. **Tomás Berruezo** 10 Aug 2026 6 min Photo by Adhitya Sibikumar on Unsplash In this article › When it works out › When it goes badly › The five questions at the counter › What to do with your usual card Buying the card on arrival works, and it works less well than people remember. Memory keeps the times it went fine and forgets the queue at dawn, the closed counter and the plan that turned out not to be the one it seemed. ## When it works out - In destinations where the process is simple and several counters compete with each other. - When you land during business hours and are not in a rush. - On long stays, where a local tariff beats any travel plan. - If your phone does not support eSIM, in which case it is the natural option. ## When it goes badly - Flights that land at dawn, which is when half the long-haul arrivals come in. - Countries with compulsory registration and paperwork, where activation is not immediate. - Airports with a single counter, which is where tourist prices go through the roof. - When you need data the moment you walk out, to order a transfer or find the hotel. ## The five questions at the counter If you do buy there, these five avoid almost every disappointment. 1. How many days does it last and from when does it count? 2. How many gigabytes is it and what happens when they run out? 3. Does it work across the whole country or only in this region? 4. Does it include calls and messages, or is it data only? 5. Can it be topped up, and how? And one check before you leave the counter: that the phone is actually browsing with the card in. That is the moment to fix it, not two hours later at the hotel. ## What to do with your usual card When you put the local card in, yours comes out of the phone if there is only one tray. Keep it in a fixed place, always the same one, and not in a trouser pocket: coming home without it is more common than it sounds, and getting the number back takes days. With an eSIM that problem does not exist, because your line never moves out of the phone. The comparison of the three ways to have data abroad is in [eSIM, pocket wifi or local SIM](https://getgigapass.com/en/blog/pocket-wifi-or-esim). The airport currency exchange counters and the SIM card counters share a habit: they are the most expensive in the country. For long stays it pays to wait for a shop in town. Know where you're going? Pick your destination, days and data. Install it before you leave and pay once. [See destinations](https://getgigapass.com/en#destinos) Tomás BerruezoPlans and small print Thirty years reading operator terms, first for work and now out of habit. If something is billed separately, he finds it. ## Frequently asked questions **Is buying a SIM at the airport a good idea?** It works well in destinations with a simple process and an arrival during business hours. It goes worse at dawn, in countries with compulsory registration, or if you need data the moment you step out. **What do I ask at the counter?** Days and from when they count, gigabytes and what happens when they run out, whether it covers the whole country, whether it includes calls and whether it can be topped up. **Is it cheaper than an eSIM?** Sometimes yes, especially on long stays, and sometimes no: airport counters tend to have tourist prices. **What do I do with my usual card?** Keep it in the same safe place every time. It is the most common loss of the trip, and getting the number back takes days. **And if my phone doesn't support eSIM?** Then the local card is the natural option, along with your operator's roaming bundle or a rented portable router. ## Keep reading - [Comparisons](https://getgigapass.com/en/blog/sim-card-europe) | SIM card for Europe: what you need depending on where you're from | 6 min - [Comparisons](https://getgigapass.com/en/blog/international-sim) | What an international SIM is and how it differs from a travel eSIM | 6 min - [Comparisons](https://getgigapass.com/en/blog/best-esim-for-thailand) | Best eSIM for Thailand: islands, cities and days to spare | 7 min