Best eSIM for Thailand (2026)
Checked 2026-06.
As of June 2026, the simplest way to get online in Thailand without roaming fees is a travel eSIM you install before you fly: Airalo is our pick for the widest coverage (it runs on AIS, the strongest national network) and the option of a plan with voice minutes, while Saily is the cheapest for light data-only use.
Airalo's Thailand plans use AIS, the network with the best rural and island coverage, and it's the rare provider that offers a data-plus-voice bundle for calling hotels, Grab drivers or restaurants. For most travelers that breadth is worth a small premium over Saily's cheaper data-only tiers.
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| Option | Data | Validity | Price | Notes |
|---|---|---|---|---|
| Airalo (our pick) | 1 GB–Unlimited (e.g. 10 GB) | 7–30 days | from ~$4.50; 10 GB/30d ~$11; unlimited from ~€8.50 | Runs on AIS (best rural/island coverage). Optional 50 GB + 100 min dtac voice bundle (~€9/10d) — rare among eSIMs. Auto-activates on arrival. |
| Saily | 1 GB–30 GB (+ unlimited) | 5–30 days | 1 GB/7d ~$2.99; 5 GB/30d ~$7.99; 20 GB/30d ~$19.99 | Cheapest for light data-only use. No local number/SMS. 'Unlimited' capped ~5 GB/day then throttled. |
| Carrier roaming (home plan) | Varies / daily pass | Per trip | ~$5–15/day; ~$50–120 for a week | Easiest (no setup) but by far the most expensive. Keeps your number. Worth it only for very short trips. |
| Local SIM (AIS / TrueMove tourist) | 15–20 GB typical | 7–30 days | ~$8–11 | Cheap, but requires a kiosk visit and passport registration on arrival. No data until you buy in-country. |
Thailand has three big mobile networks — AIS, TrueMove H and dtac — and coverage is excellent in Bangkok, Chiang Mai, Phuket and the main tourist islands, with AIS generally the strongest once you leave the cities. Airalo's Thailand data plans run on AIS (its voice bundle uses dtac), while Saily is data-only on a local partner network. Both deliver fast 4G/5G in populated areas; on remote islands and in national parks any network can drop to slow data, so don't expect flawless coverage everywhere.
Set the eSIM up before you leave home: buy the plan in the app, install the eSIM over Wi-Fi, and it activates automatically when you land and connect to a Thai network (so you have data the moment you clear the airport). You'll need an eSIM-capable, carrier-unlocked phone — most iPhone XS and newer, and recent Pixel, Samsung Galaxy and other flagships qualify. Keep your physical SIM in the phone for calls and texts on your home number, and switch the eSIM on for data.
For data sizing, light use (Google Maps, WhatsApp, ride apps, a little browsing) runs roughly 0.3–0.5 GB per day, so a 1–2 week trip is comfortable on 5–10 GB. If you stream video, hotspot a laptop or post a lot of photos and video, budget closer to 1–1.5 GB per day or pick an unlimited tier. Note that 'unlimited' plans from both providers are throttled after a daily fair-use cap (around 5 GB/day on Saily; Airalo doesn't publish its exact threshold), so they're best for heavy-but-not-extreme use.
On price and validity (checked June 2026, USD/EUR ranges): Airalo Thailand starts from around $4–5 for small data packs, with a popular 10 GB / 30-day plan near $11 and unlimited tiers from roughly €8.50 (3 days) up to €44 (30 days); it also has a 50 GB + 100-minute / 10-day dtac bundle around €9 if you want voice. Saily is cheaper at the small end — about $2.99 for 1 GB / 7 days, $7.99 for 5 GB / 30 days, and around $19.99 for 20 GB / 30 days — but it's data-only with no local number or SMS. Live prices change, so check each provider's page before buying.
Thailand-specific gotcha: the country requires SIM/eSIM registration, but with a travel eSIM the provider handles it — you don't queue at a counter or hand over your passport. That convenience is the main reason to skip a local physical SIM, which is cheap (AIS/TrueMove tourist SIMs run ~$8–11 for 15–20 GB) but means a kiosk visit and passport registration on arrival. A travel eSIM is the better choice if you want to land already connected.
For your exact trip, run the eSIM vs roaming cost calculator (your destination, days and data, ranked by total cost).
FAQ
Does an eSIM work in Thailand?
Yes. Thailand's networks (AIS, TrueMove H, dtac) fully support eSIM, and providers like Airalo and Saily run on these networks. You just need an eSIM-capable, unlocked phone — most iPhone XS and newer, and recent Pixel/Samsung flagships.
How much data do I need for a trip to Thailand?
For maps, messaging and ride apps, plan on about 0.3–0.5 GB per day, so 5–10 GB covers most 1–2 week trips. If you stream video or hotspot other devices, budget 1–1.5 GB per day or choose an unlimited plan.
Can I keep my phone number with a travel eSIM?
Yes. Keep your physical SIM in the phone for calls and texts on your home number, and use the travel eSIM only for data. Airalo and Saily's Thailand plans are data-focused, though Airalo offers one bundle with Thai voice minutes.
Should I activate the eSIM before or after I arrive in Thailand?
Install it before you fly while you have Wi-Fi, then let it activate automatically when you land and connect to a Thai network. That way you have data the moment you leave the airport, with no kiosk visit or passport registration.