Thailand is one of the most popular Asian destinations for Spanish travelers, and also one of the easiest for connectivity. 4G coverage in tourist areas is excellent, and eSIM allows you to be connected as soon as you land at Bangkok's Suvarnabhumi Airport.
Thailand Coverage and Operators
| Local Operator | Coverage | Technology | eSIM Compatible |
|---|---|---|---|
| AIS | ✅ National (best coverage) | 4G/5G | ✅ |
| DTAC | ✅ National | 4G | ✅ |
| True Move H | ✅ National | 4G/5G | ✅ |
Data Speed in Thailand
Recommended eSIM Plan for Thailand
| Trip Duration | Recommended GB | Estimated Cost | Who it's for |
|---|---|---|---|
| 3–5 days (getaway) | 8 GB | €8–12 | Occasional traveler |
| 7–10 days (week) | 15 GB | €12–18 | Typical tourist |
| 2–4 weeks (backpacker) | 25 GB | €18–28 | Backpacker |
| 1–3 months (nomad/surfer) | Monthly plan 50 GB | €25–40 | Nomad or long stay |
Our recommendation: Thailand 15 GB plan for 10 days at €12–18. Activate from home before leaving.
How to activate eSIM in Thailand
- Purchase the plan on purasim.com before leaving Spain
- Scan the QR received by email (at home, with WiFi)
- Upon landing, activate the data plan in Settings → Mobile Data
- The eSIM automatically connects to the best available operator
Comparison of connectivity options
| Option | 7-day Cost | Speed | Management |
|---|---|---|---|
| Spanish operator roaming | €50–120 | Normal | No management |
| Local SIM card | €8–20 | Very good | Requires in-store procedures |
| PuraSIM eSIM | €10–20 | Very good | 100% digital, from Spain |
| Hotel WiFi + hotspots | €0 data | Variable | External dependency |
Conclusion
For trips to Thailand, PuraSIM's eSIM is the most convenient option: it's purchased and installed from Spain, and upon landing in Bangkok, you have data without waiting. The cost is similar to a local SIM but without the time wasted searching for phone stores at your destination.
Frequently Asked Questions
Is there 5G in Thailand?
Yes, AIS and True Move H have 5G coverage in Bangkok and major cities. For most tourist areas, 4G LTE is more than sufficient.
Does eSIM work on the islands (Koh Samui, Koh Phangan, Koh Phi Phi)?
Yes, with good coverage on the main islands. In more remote beaches or the interior of smaller islands, it may be 3G or irregular.
How many GB do I need for Thailand?
For 10 days with normal use: 10–15 GB. For nomads working from Chiang Mai: 25–30 GB/month.
Does eSIM work on the Bangkok-Chiang Mai (high-speed train) route?
The Bangkok-Chiang Mai high-speed line is still under construction (expected opening 2027). Current conventional trains have variable 4G coverage.
Do I need a VPN in Thailand?
Generally not necessary. Thailand blocks some websites, but services travelers use (Google, Instagram, YouTube) are available without a VPN.
