Connect across Thailand on AIS, DTAC, and True Move H networks. From Bangkok's Sukhumvit to Phuket's beaches, Chiang Mai's temples, and the islands of Koh Samui and Koh Tao. Instant-activation eSIM — works the moment you land at Suvarnabhumi or Don Mueang.
5G ready Hotspot included Keep your home line 24/7 humans
Change your mind within 7 days and we refund in full — as long as the eSIM is unused or under 100 MB, so you can install it and check it connects first. A plan that genuinely fails is refunded any time. Details.
Pick data amount and validity. Pay with card, Apple Pay, or Google Pay.
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Scan the QR code
We email a QR code instantly. Scan it in Settings — installed in under 60 seconds. No app needed.
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Land online in Thailand
Your phone connects to local networks automatically when you arrive. No SIM swap, no kiosk. Hotspot included.
Network
Coverage & connectivity.
Networks we run on in Thailand
AIS5GDTAC5GTrue Move4G
Your device connects to the strongest available network automatically — no manual setup.
Bangkok Chiang Mai Phuket Pattaya Khon Kaen
Thailand has excellent 4G/LTE coverage in all major cities and tourist destinations. AIS operates the widest national network with 5G deployed in Bangkok and expanding to major provincial capitals. DTAC and True Move H provide competitive coverage and often better speeds in resort areas. Bangkok's BTS Skytrain, MRT subway, and expressways have full connectivity throughout. Phuket, Koh Samui, and Koh Phangan have reliable 4G in town centers and beach zones — ferry crossings between islands may have intermittent service on the water. Northern mountain regions around Chiang Rai and Pai have 4G in towns but may thin out in remote river valleys. Koh Tao and smaller islands typically have adequate LTE at resorts but weaker signals at offshore dive sites.
Plan size
How much data do you need?
Pick your travel style and trip length — we'll suggest the right Thailand plan, no guessing.
Does the eSIM work in Phuket, Koh Samui, and Koh Tao?
Yes. All major Thai islands have 4G in resort and town areas. More remote parts of smaller islands may have weaker signals — perfectly normal for island destinations.
Will this work on Thai trains and the Bangkok BTS?
Yes. The Bangkok BTS Skytrain and MRT have full 4G coverage at stations and between above-ground stops. Long-distance State Railway trains have 4G in populated areas.
Are WhatsApp and LINE available in Thailand?
Yes. All messaging and VoIP apps work normally — WhatsApp, LINE, Facebook Messenger, FaceTime, and Zoom.
Do I need to register the eSIM with my passport?
No. As an eSIM, there is no physical registration process. Flysimio activates without any passport or ID submission on your part.
Is Thailand eSIM cheaper than buying at Suvarnabhumi airport?
Yes, substantially. Airport SIM vendors at Suvarnabhumi charge tourist-premium rates. Flysimio connects to the same AIS/DTAC network at significantly lower cost.
What is an eSIM?
An eSIM (embedded SIM) is a digital SIM built into your phone. Instead of a physical card, you scan a QR code and your plan installs instantly — no SIM tray needed.
Is my phone eSIM-compatible?
iPhone XS (2018) and newer, most Android flagships from 2020+, and all Samsung Galaxy S21+ devices support eSIM. Check our compatibility page for the full device list.
How do I install the eSIM?
After purchase, we email a QR code. On iPhone: Settings → Cellular → Add eSIM → Scan QR Code. On Android: Settings → Network & Internet → SIMs → Add eSIM. The whole process takes under 60 seconds.
Can I keep my regular SIM while using this eSIM?
Yes. Most phones support dual SIM (physical + eSIM). Keep your home number for calls and SMS — use Flysimio for data abroad. You control which SIM handles what in your phone Settings.
Does the eSIM include a hotspot (tethering)?
Yes, all Flysimio plans include mobile hotspot at no extra charge. Share your data connection with laptops, tablets, or other devices freely.
What happens when my data runs out?
You can top up data from your account dashboard at any time. Top-ups are applied instantly — no need to buy a new eSIM or wait.
Can I get a refund?
Yes. We offer a full refund within 7 days of purchase. Contact contact@flysimio.com with your order number.
How long is the eSIM valid for?
You have 6 months from your purchase date to activate the eSIM. Once activated, the plan validity period (e.g., 7 days, 30 days) begins counting down.
Will the eSIM work at the airport when I land?
Yes — as long as you installed the eSIM before your flight, it activates automatically when your phone connects to a local network on landing. No Wi-Fi required for activation.
What if the QR code doesn't scan?
If the QR code won't scan, you can enter the activation code manually — we include both in the email. You can also contact our 24/7 support team and we'll resend or manually provision your eSIM.
eSIM in Thailand
The complete guide.
Best eSIM for travel to Thailand
A great Thailand eSIM needs strong coverage, honest pricing, and instant setup. Flysimio connects to AIS, DTAC, and True Move H — the networks that cover Bangkok, Chiang Mai, and Phuket, plus the islands of Koh Samui and Koh Tao — with 5G in the major cities. Plans are prepaid with no contract and no roaming surprises, so the price you see is what you pay. Your QR code arrives by email seconds after checkout and installs in under a minute, every plan includes free mobile hotspot, and there's a 7-day money-back guarantee. Land at Suvarnabhumi or Don Mueang already connected — no airport SIM counter, no passport registration.
How to set up a Thailand eSIM (step by step)
Getting online in Thailand takes about two minutes. First, confirm your phone supports eSIM — iPhone XS (2018) and newer and most Android flagships from 2020 qualify. Choose your Thailand plan on Flysimio and pay with card, Apple Pay, or Google Pay; your QR code arrives by email within seconds. On Wi-Fi before you fly, open Settings → Cellular → Add eSIM (iPhone) or Network & Internet → SIMs → Add eSIM (Android) and scan it — a manual code is included too. Unlike a local SIM, there's no passport registration. Keep your home line as default until arrival; when you land at Suvarnabhumi, Don Mueang, or Phuket, your Flysimio line connects automatically.
How much data do you need in Thailand?
Most travellers over-buy. For maps, messaging, and email, roughly 300 MB a day is plenty, so a 3–5 GB plan covers a week in Bangkok comfortably. Add social media, photos, and music and you'll want about 700 MB a day — a 10 GB plan suits a two-week trip from the city to the islands. Heavy streamers, video callers, and anyone tethering a laptop should plan for 1.5 GB or more per day or choose an unlimited daily plan. Not sure? The calculator above matches your travel style and trip length to a size, and you can top up mid-trip if you run low on Koh Samui.
Using a Thailand eSIM on iPhone and Android
Flysimio runs as a second line beside your usual SIM, so you keep your home number for calls and texts while your Thai data flows over the eSIM — standard dual-SIM behaviour on iPhone XS and later and most Android phones from 2018. After installing, set the Flysimio eSIM as your cellular-data line and turn on Data Roaming for that line only; it simply lets the eSIM connect to Thai networks, with no roaming fees. Keep your home SIM on for messages and calls, or switch it off to avoid your carrier's charges. If you're unsure about your model, the compatibility page confirms it before you buy.
Hotspot, calls, and texts on a Thailand data eSIM
Every Flysimio Thailand plan includes mobile hotspot at no extra cost and without throttling, so you can tether a laptop or tablet or share with a travel companion and use your full allowance freely. As a data-only eSIM it has no Thai phone number, but that rarely matters: WhatsApp, LINE, FaceTime, and Google Meet handle calls and messages over data, and your home number stays reachable on your primary SIM. You stay connected from Bangkok to the islands without the per-minute charges of traditional roaming.
Short Thailand trips vs. long stays
For a few days in Bangkok or a quick island getaway, a small 1–5 GB plan on a 7-day validity is the most economical choice. For a two-week trip combining the city, the north, and the islands — or a longer stay — a 10–20 GB plan or an unlimited daily option lets you navigate, stream, and share without watching a meter. Because Flysimio gives you six months to activate, you can buy before you leave and the validity only starts when your eSIM first connects in Thailand. No contract, nothing to cancel — the plan stops when it's done, and you can top up or rebuy for your next trip.
