Best eSIM by destination → Thailand
Best eSIM for Thailand (2026)
Thailand sits outside EU roaming rules, so UK networks charge some of their highest daily rates there — £6 to £8 a day on most networks. A travel eSIM sidesteps that entirely: buy online in minutes, install it before you fly, and land with data from $3.90.
And whatever shape the trip takes — a Bangkok long weekend, temples and night markets in Chiang Mai, or island-hopping between Phuket and the Gulf islands — the maths is the same. We compared the two providers worth considering for Thailand below. Both are data-only (no Thai phone number), both install alongside your existing SIM, and both beat roaming on price for any trip longer than a day or two.
Best eSIM for Thailand: Roafly — 10GB for $10.00, valid 30 days, on the TrueMove H and DTAC networks, hotspot included. Buy and install it before you fly; the plan only starts counting down when you first connect in Thailand.
See Roafly Thailand plansThailand eSIM comparison
Prices checked 20 October 2026, from the providers' own pages. Always confirm the final price before you buy.
| Provider | Data | Validity | Price | Hotspot allowed | Calls or data-only | |
|---|---|---|---|---|---|---|
| Roafly | 1–50GB | 7–180 days | From $3.90 | Yes — from your allowance, no separate hotspot quota | Data only — no phone number; use WhatsApp/FaceTime for calls | View plans |
| Dingo | Country plans — sizes shown in the Dingo app | See app | See app | Check the plan terms in the app | Data only — no phone number or SMS; the app also sells a separate pay-as-you-go calling balance | View plans |
Roafly's Thailand plans in full
| Data | Validity | Price | Per GB |
|---|---|---|---|
| 1GB | 7 days | $3.90 | $3.90 |
| 2GB | 14 days | $5.50 | $2.75 |
| 3GB | 30 days | $6.50 | $2.17 |
| 5GB | 30 days | $7.50 | $1.50 |
| 10GB | 30 days | $10.00 | $1.00 |
| 20GB | 30 days | $16.00 | $0.80 |
| 50GB | 10 days | $18.00 | $0.36 |
| 50GB | 180 days | $49.00 | $0.98 |
Two plans worth a second look: the 50GB / 10-day plan ($18.00) is the cheapest per-GB data Roafly sells anywhere, built for a short, heavy trip — and the 50GB / 180-day plan ($49.00) covers a whole season. Dingo sells its Thailand plans inside the Dingo app rather than on a public price page, so open the app to see its current sizes and prices before deciding.
Best eSIM for Thailand by traveller type
Best overall — Roafly 10GB / 30 days ($10.00)
Covers a normal one-to-two-week holiday comfortably at exactly $1.00 per GB, and the 30-day validity means you are covered even if your dates shift.
Best cheap option — Roafly 1GB / 7 days ($3.90)
Enough for a short city break if you are mostly on hotel Wi-Fi: maps, messaging and light browsing. The lowest entry price of any Thailand eSIM we could verify.
Best for heavy data — Roafly 20GB / 30 days ($16.00)
For hotspotting a laptop, daily video calls, or sharing one plan between two phones. At $0.80 per GB it is superb value — and if your trip is short and intense, the 50GB / 10-day plan at $18.00 drops the per-GB price to $0.36.
Best for a long trip — Roafly's 50GB / 180-day plan ($49.00)
Staying for a season? One plan covers six months, so you are not buying twice. One honest caveat: Thai tourist SIMs and visas have their own time limits, and a long stay usually involves a visa run or extension — the eSIM will outlast most tourist visas, which is exactly what you want, but plan the paperwork side separately.
Best if you also need to make real calls — Dingo
The eSIM itself is data-only like the rest, but Dingo's app bundles a pay-as-you-go internet calling balance alongside it, so you can ring landlines and non-WhatsApp numbers without a second app. Check its Thailand plan sizes and prices in the app.
Coverage and speed in Thailand — honestly
Roafly's Thailand eSIM connects to TrueMove H and DTAC — the combined True network that Thai customers use, not a throttled tourist band. Expect 4G/LTE everywhere tourists go (Bangkok, Chiang Mai, Phuket, the Gulf and Andaman coasts) and widespread 5G in Bangkok and the bigger cities. Roafly states full speeds with no daily limits on its fixed plans. Both the Andaman and Gulf coasts are well served around the resorts and ferry ports; the crossings between islands remain the patchy bit.
The honest caveats:
- Small islands drop off. Away from the main beaches and piers, signal on the smaller islands fades on every network — eSIM or local SIM alike. Download offline maps before boat trips.
- The northern mountains are thin. The Mae Hong Son loop and rural stretches between towns have patchy coverage; cities and main highways are fine.
- Speeds vary with congestion. Bangkok at rush hour and full-moon-party Koh Phangan are slower than a quiet beach town. That is true of every provider.
Neither provider asks for ID verification or a passport scan to buy — a genuine advantage over airport SIM desks, where Thai law requires your passport to register the SIM.
How much data do you actually need?
Rough real-world usage, per hour of active use:
- Google Maps / navigation: 5–10MB
- WhatsApp and messaging: next to nothing
- Instagram / Facebook browsing: 100–200MB
- Video calls (WhatsApp, FaceTime): 250–500MB
- Streaming video in HD: around 1GB
As a rule of thumb for a week in Thailand:
- Light week (maps, messaging, hotel Wi-Fi in the evenings): 2–3GB
- Normal week (social media, photos, some video): 5GB
- Heavy week (hotspot use, daily video calls, two devices): 10–20GB
When in doubt, size up one tier. The jump from 5GB to 10GB on Roafly is $2.50 — cheaper than any top-up or second purchase mid-trip.
How to install your Thailand eSIM
Do this at home on Wi-Fi, before you fly. It takes about five minutes.
- Check your phone. Dial
*#06#— if you see an EID number, your phone supports eSIM. It also needs to be carrier-unlocked. - Buy your plan. Pick your data amount and pay online; your QR code arrives by email within minutes.
- Install it. iPhone: Settings → Mobile Service → Add eSIM → scan the QR code. Android: Settings → Network / Connections → SIMs → Add eSIM → scan. The Thailand plan sits alongside your normal SIM — nothing gets removed.
- When you land, switch the Thailand eSIM line on, turn Data Roaming ON for the eSIM line, and set it as your data line. Roaming on the eSIM line is included in the plan price — there are no extra charges.
- Keep your home SIM switched on for calls, texts, WhatsApp and bank security codes. Only your data routes through the eSIM.
Your plan's validity starts when the eSIM first connects to a network in Thailand — not when you buy or install it. Installing early costs you nothing, and it means you skip the airport SIM queues entirely.
eSIM vs roaming vs local SIM in Thailand
| Option | What a week costs | The catch |
|---|---|---|
| Travel eSIM (Roafly 5–10GB) | $7.50–$10.00 total | Data only — calls go over WhatsApp |
| UK roaming | EE £6/day (£42 a week) · O2 £7/day (£49) · Three £7/day (£49) · Vodafone £8/day (£56) · Sky £2/day (£14) | Daily charges stack fast; Thailand is outside every UK network's inclusive EU roaming |
| Local tourist SIM (airport desk) | From 299 baht (~$8.50) for an ~8-day tourist package | Passport registration is legally required, airport queues at busy times, and your home SIM comes out — though you do get a Thai number |
Roaming daily charges and airport SIM prices checked October 2026. Irish travellers: Thailand is outside EU roaming for Irish networks too, so the same logic applies — an eSIM is usually far cheaper than your network's Thailand rates.
Thailand is the closest contest on this site, honestly: the airport tourist SIM is genuinely cheap. The eSIM still wins for most people — it is the same money or less, it is working before the plane doors open, your home number stays live for bank codes, and there is no passport photocopy or queue. Roaming, as ever, is the expensive way to do any of it: a fortnight costs £84–£112 on EE, O2, Three or Vodafone.
Thailand eSIM FAQs
What is the cheapest eSIM for Thailand with 10GB of data?
Roafly's 10GB plan — 30 days' validity for $10.00 (checked October 2026) — is the cheapest 10GB Thailand eSIM we could verify on a public price page. Dingo's prices live inside its app, so it is worth a quick in-app check before you buy.
What is the best eSIM for Thailand for iPhone?
Any plan on this page works on iPhone XS/XR and newer, provided the phone is carrier-unlocked. Our pick is Roafly's 10GB plan: install it in Settings → Mobile Service → Add eSIM before you fly, and it connects automatically when you land.
Can I buy an eSIM for Thailand before I travel?
Yes — and you should. Both Roafly and Dingo plans only start counting down when the eSIM first connects to a network in Thailand, so buying and installing a week early wastes no validity and saves you the airport SIM queue.
Does an eSIM for Thailand include a phone number?
No. Travel eSIMs for Thailand are data-only: no Thai number and no SMS. Make calls over WhatsApp, FaceTime or Messenger, and keep your home SIM active for texts and bank codes. Dingo's app also sells a separate pay-as-you-go calling balance alongside its eSIM data. If a Thai (+66) number genuinely matters — some local apps and delivery services ask for one — that is the one thing an airport tourist SIM gives you that an eSIM does not.
What is the best eSIM for Bangkok?
The same country plans — Bangkok has Thailand's strongest coverage, including widespread 5G. For a city break, Roafly's 5GB plan (30 days, $7.50) covers maps, transit apps, translation and social media comfortably.
What is the best eSIM for Thailand for 7, 14 or 30 days?
7 days: 1GB for $3.90 if you are light on data, 2GB for $5.50 for normal use. 14 days: 5GB for $7.50, or 10GB for $10.00 if you hotspot or video-call daily. 30 days: 10GB for $10.00, or 20GB for $16.00 for heavy use. All Roafly prices, checked October 2026.
The verdict
For most trips to Thailand, Roafly's 10GB plan at $10.00 is the one to buy: a week's roaming on most UK networks costs four to five times more, it installs in five minutes before you fly, and the hotspot is included. Pick Dingo instead if you want a calling balance in the same app as your data — and check its in-app Thailand prices first, because they are not published on the web.
Get the Roafly 10GB Thailand plan — $10.00
Prices on this page were checked on 20 October 2026 and can change — confirm the final price with the provider before you buy. This page contains affiliate links; see ouraffiliate disclosure. More destinations:best eSIM by destination.