[2025 Edition] The Ultimate Guide to SIM Cards & eSIMs in Thailand – AIS, DTAC, Saily & More Compared!
If you’re planning a trip to Thailand, one essential thing you shouldn’t forget is reliable internet access. Whether you’re navigating with Google Maps, booking a Grab ride, or sharing your adventures on Instagram, having stable connectivity is key. That’s where SIM cards and eSIMs come in.
In this guide, we compare five of the most popular SIM and eSIM providers for Thailand—including AIS, DTAC, TrueMove H, Saily, and Happi eSIM. Each has its unique strengths, and we’ll help you find the one that matches your travel style. Plus, we’re sharing a $5 discount code for Saily—don’t miss it!
目次
1. Why Use a SIM or eSIM in Thailand?
While public Wi-Fi is available in Thailand, it’s often unreliable, especially when you’re on the move. Having your own SIM card or eSIM ensures smooth connectivity throughout your trip.
Benefits include:
- Much cheaper than international roaming
- Access to maps, translation apps, and ride-hailing services
- Instant access to social media and messengers
- eSIMs let you activate everything before arrival—no physical SIM swap needed
If your phone supports eSIM, it’s one of the fastest and most convenient ways to get connected the moment you land.
2. The Big 3: AIS, DTAC, and TrueMove H
AIS
Thailand’s largest mobile network, AIS offers great coverage and fast speeds. It’s widely available at airports, with easy setup and support in English.
- Popular Plan:
7 days, unlimited data (first 5GB at high speed) + local calls – ($8.50 USD)
DTAC
Another favorite among tourists, DTAC offers solid urban coverage and affordable tourist SIM packs. Known for value and good customer support.
- Popular Plan:
8 days, 15GB high-speed data – ($7 USD)
TrueMove H
Great for city explorers, TrueMove offers reliable internet and access to numerous partner Wi-Fi hotspots around Bangkok and major tourist hubs.
- Popular Plan:
10 days, 30GB – ($8.50 USD)
All three providers have airport counters for easy purchase and activation with your passport.
3. Saily: A Rising Star for Travelers Using eSIM
Saily is a fast-growing eSIM provider popular among digital nomads and short-term travelers. With Saily, there’s no need to change your physical SIM—just download the eSIM and activate in minutes.
- Highlights:
・Instant setup via mobile app
・Flexible plans from 1 to 30 days
・Available for Thailand only or multi-country packages across Asia - Sample Plans:
7 days / 3GB – ~$5.50 USD
15 days / 5GB – ~$9 USD - ✅ Exclusive Coupon Code:
Use promo code DOMUEH5022 when purchasing via the app or website to get $5 off your eSIM plan! (Conditions apply)
If you want instant connectivity right after landing, Saily is a hassle-free solution.
4. Happi eSIM: Affordable & Flexible for Short-Term Trips
Happi eSIM is another solid option, offering competitive pricing for travelers who need short-term, flexible data packages. Their website-based system delivers a QR code instantly to your email.
- Sample Plans:
5 days / 3GB – ~$5 USD
10 days / 6GB – ~$9 USD
Ideal for those who want basic internet access without breaking the bank.
5. Which SIM is Best for Your Travel Style?
| Travel Style | Best Option | Why |
|---|---|---|
| First-time visitors | AIS / DTAC | Available at the airport, easy setup |
| Staying mostly in cities | DTAC / TrueMove H | Reliable coverage and speed |
| Minimalist traveler | Saily / Happi eSIM | No SIM swap needed, eSIM setup in minutes |
| Multi-country traveler | Saily (Asia package) | Use one eSIM across multiple countries |
| Budget-focused | Happi eSIM | Great value for short stays |
Conclusion
Staying connected while traveling in Thailand makes everything from sightseeing to communication easier and safer. While local SIM cards are still widely used, eSIMs are rapidly becoming the go-to choice for their convenience and flexibility.
If you’re looking for a simple, reliable, and affordable option, Saily stands out as one of the best—with the added bonus of $5 off using the promo code DOMUEH5022.
Pick the plan that suits your needs and enjoy a stress-free, well-connected trip to Thailand!
