Thailand is one of the favorite destinations for Spanish and Latin American travelers: postcard beaches, Buddhist temples, incredible gastronomy, and an unparalleled nightlife. But there's something that can ruin the experience — running out of internet or paying astronomical roaming bills upon return.
In this guide, we explain exactly which eSIM to choose for 10 days in Thailand, how much data you need according to your travel style, and how to activate it in minutes before boarding your flight.
1. Why use an eSIM in Thailand (and not your roaming plan)
International roaming with Spanish or Latin American operators in Thailand can cost you high daily rates. For a 10-day trip, the cost for mobile data alone can be very significant on your bill.
The traditional alternative was to buy a physical SIM at Bangkok airport. It worked, but you had to queue, show your passport, and handle your phone's SIM. With an eSIM for Thailand, everything is simpler:
- You buy it from home, before traveling
- It's installed by scanning a QR code
- You don't touch the physical SIM (you can keep your Spanish number active)
- It activates automatically upon arrival in Thailand
- Price: competitive for 10 days, depending on the plan
If your phone is eSIM compatible (iPhone XS or later, Samsung Galaxy S20+, Pixel 3+), there's no reason to keep paying for roaming.
2. How many GB do you need for 10 days in Thailand?
The amount of data you need depends on how you use your phone during the trip. Here's a quick guide:
| Type of Use | Recommended GB | Traveler Profile |
|---|---|---|
| Basic (WhatsApp, maps) | 5–8 GB | Minimalist traveler, uses WiFi in hotels |
| Moderate (social media, photos) | 10–15 GB | Regular traveler, posts on Instagram |
| Intensive (video calls, streaming) | 20 GB or unlimited | Digital nomad, streamer, remote work |
Our recommendation for 10 days: the 15–20 GB plan covers most travelers without worry. If you work remotely or make many video calls, consider the unlimited plan.
An important fact: in Thailand, hotel, cafe, and restaurant WiFi is generally good, which significantly reduces your eSIM data consumption.
3. eSIM plan comparison for Thailand 10 days
On PuraSim, you'll find several eSIM plans for Thailand. Here we explain the key differences:
| Plan | Data | Validity | Ideal for |
|---|---|---|---|
| Basic TH | 5 GB | 15 days | Travelers with frequent WiFi access |
| Standard TH | 10 GB | 15 days | Most travelers |
| Premium TH | 20 GB | 30 days | Intensive users, remote work |
| Unlimited TH | Unlimited* | 15 days | Digital nomads, streaming |
*Unlimited plans may experience throttling after a high volume of daily consumption.
If you're combining Thailand with other Southeast Asian countries (Vietnam, Cambodia, Malaysia), consider a regional eSIM plan for Asia that covers your entire trip with a single eSIM.
4. How to install and activate your eSIM for Thailand
Installing an eSIM is easier than it seems. The entire process takes less than 5 minutes:
- Buy your eSIM on PuraSim and receive an email with your QR code
- Go to your phone's Settings → Mobile Data (or Cellular) → Add Data Plan
- Scan the QR code you received via email
- Name the plan (e.g., "Thailand") and save
- Upon arrival in Bangkok, activate the eSIM data plan — it connects automatically
An important tip: install the eSIM before leaving home, with WiFi available. Once at the airport or on the plane, it's more complicated. For step-by-step instructions according to your phone model, consult our eSIM installation guide.
Remember to also disable data roaming on your primary SIM to avoid accidental charges while using the eSIM.
5. Connectivity tips for your trip to Thailand
Beyond choosing the right plan, here are practical tips to make the most of your internet in Thailand:
- Bangkok has excellent 4G/5G coverage: in the city center and tourist areas, you'll have good speed constantly
- The southern islands (Koh Samui, Koh Tao): coverage is good in the main beach areas, but it may fail in the island's interior or very remote beaches
- Chiang Mai and the north: good coverage in the city and tourist areas; in mountain trekking, there may be areas without signal
- Download offline maps: use Google Maps or Maps.me to download maps of the cities you visit — it will save you data and work without a signal
- Airplane mode + WiFi: in hotels with good WiFi, activate airplane mode and connect only via WiFi to preserve eSIM data
- Share connection: you can share the eSIM as a hotspot with other travelers or with your tablet
For more information on how to prepare your connectivity before traveling, read our guide on the best eSIMs for travel in 2026.
Frequently asked questions about eSIM for Thailand
How many GB do I need for 10 days in Thailand?
For moderate use (maps, social media, messaging) for 10 days, we recommend a minimum of 10 GB. If you make frequent video calls or stream, opt for 20 GB or unlimited data.
Does the eSIM work throughout Thailand?
PuraSim eSIMs have coverage in Bangkok, Chiang Mai, Phuket, Koh Samui, and practically the entire urban and tourist network. In very remote rural areas, the signal may be limited.
Can I use WhatsApp and Google Maps with the eSIM?
Yes, without any problem. WhatsApp, Google Maps, Instagram, and any app work normally with the eSIM active.
How long does it take for the eSIM for Thailand to activate?
Installation and activation are immediate. You receive the QR by email, and in less than 5 minutes, you have data on your phone. Coverage activates upon arrival in Thailand.
Do I need to unlock my phone to use an eSIM?
Your phone must be eSIM compatible (iPhone XS or later, Samsung Galaxy S20 or later, among others) and unlocked from the operator. Most phones purchased unlocked or SIM-free are compatible.
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View Thailand eSIM plans
