--- title: "Internet in Thailand: coverage, local SIM and eSIM" description: "Better coverage than expected and a simple local process. Where the signal fails, what the phone is used for there and what two weeks use." url: https://getgigapass.com/en/blog/internet-in-thailand markdown: https://getgigapass.com/en/blog/internet-in-thailand.md lang: en site: Gigapass generated: 2026-10-24 languages: es: https://getgigapass.com/blog/internet-en-tailandia-para-viajeros de: https://getgigapass.com/de/blog/internet-in-thailand it: https://getgigapass.com/it/blog/internet-in-thailandia fr: https://getgigapass.com/fr/blog/internet-en-thailande pt: https://getgigapass.com/pt/blog/internet-na-tailandia nl: https://getgigapass.com/nl/blog/internet-in-thailand ja: https://getgigapass.com/ja/blog/tai-internet ko: https://getgigapass.com/ko/blog/taeguk-internet zh-hans: https://getgigapass.com/zh-hans/blog/taiguo-wangluo pl: https://getgigapass.com/pl/blog/internet-w-tajlandii sv: https://getgigapass.com/sv/blogg/internet-i-thailand no: https://getgigapass.com/no/blogg/internett-i-thailand da: https://getgigapass.com/da/blog/internet-i-thailand tr: https://getgigapass.com/tr/blog/tayland-da-internet ru: https://getgigapass.com/ru/blog/internet-v-tailande zh-hant: https://getgigapass.com/zh-hant/blog/taiguo-shangwang ar: https://getgigapass.com/ar/mudawana/al-internet-fi-tayland he: https://getgigapass.com/he/blog/internet-be-tailand index: https://getgigapass.com/llms/en.txt --- # Internet in Thailand: cities, islands and long transfers > Better coverage than expected and a simple local process. Where the signal fails, what the phone is used for there and what two weeks use. [Home](https://getgigapass.com/en) › [Blog](https://getgigapass.com/en/blog) › Internet in Thailand: cities, islands and long transfers Destinations Better coverage than expected and a simple local process. Where the signal fails, what the phone is used for there and what two weeks use. **Rubén Ortega** 10 Aug 2026 7 min Photo by Alejandro Cartagena on Unsplash In this article › Coverage, by area › What the phone is used for in Thailand › Local SIM, roaming or eSIM › What you will use › Three things for the trip Thailand is one of the countries in Southeast Asia where staying connected is easiest: the network is good, the local process is simple and there is wi-fi in almost every place to stay. What changes the trip is the transfers. ## Coverage, by area | Where | What to expect | | --- | --- | | Bangkok and Chiang Mai | Wide 4G and 5G | | Tourist islands | Good in the towns and on the main beaches | | Boat crossings | Comes and goes, and disappears mid-crossing | | Mountainous interior of the north | Patchy | | National parks | Little or none | ## What the phone is used for in Thailand Three things: maps, transport and messaging with the places you stay. A good share of the bookings for transfers, excursions and small hotels is handled by messaging, so running out of data mid-trip complicates daily life more than at a European destination. The translator comes out less than you would think in the tourist areas and quite a lot in the north and in the markets. ## Local SIM, roaming or eSIM The local SIM is easy to buy and there are counters at the airports, so here the eSIM does not win on the errand avoided as much as at other destinations. It wins by giving you data from minute one, with no dawn queue and without taking your own card out of the phone. A European plan's roaming treats Thailand as an international zone, so it is worth looking at what yours includes before assuming anything. Which plan fits a trip of this kind is in [how to choose the best eSIM for Thailand](https://getgigapass.com/en/blog/best-esim-for-thailand). ## What you will use Between 200 and 400 MB a day if you keep it practical, and between 500 MB and 1 GB if you also use social media normally. Posting video daily, more. ## Three things for the trip 1. Download the maps of Bangkok, of the islands and of the routes between them. 2. Save the addresses in Thai in a note, because that is what you show a taxi driver. 3. Before a boat crossing, have the ticket and the address of the next place to stay downloaded. The weather rules more than the coverage: in the rainy season there are occasional power cuts on small islands, and with them goes the accommodation's wi-fi. Your own data keeps working. Leaving soon? Pick the days and the data you need. Install it before you leave and pay once. [See plans](https://getgigapass.com/en/thailand) Rubén OrtegaAsia and the Middle East He left for three months in Southeast Asia and came back four years later. He writes about the places where sorting out a local line is half the trouble. ## Frequently asked questions **Is coverage good in Thailand?** Yes in the cities and on the tourist islands, with wide 4G and 5G in Bangkok and Chiang Mai. It fails on boat crossings, in the mountainous interior and in national parks. **Is it easy to buy a local SIM in Thailand?** Yes, there are counters at the airports and the process is simple. In exchange you have to queue and take your own card out of the phone. **How many gigabytes do I need for two weeks?** Between 3 and 6 GB with practical use and between 8 and 15 if you post photos and videos daily. **Does the phone work on the islands?** Yes in the towns and on the main beaches. On the crossings between islands the signal comes and goes, so download beforehand what you need. **Is a translator needed?** In tourist areas, little; in the north and in markets it helps quite a lot. With Thai downloaded it works offline. ## Keep reading - [Comparisons](https://getgigapass.com/en/blog/best-esim-for-thailand) | Best eSIM for Thailand: islands, cities and days to spare | 7 min - [Destinations](https://getgigapass.com/en/blog/arriving-in-bangkok) | You have just landed in Bangkok: internet, transport and money | 7 min - [Destinations](https://getgigapass.com/en/blog/internet-in-china) | Internet in China: what works, what does not and how to arrive ready | 9 min