eSIM Thailand 2026: Avoid roaming charges & browse affordably
eSIM Thailand 2026: Avoid roaming charges & surf affordably
Short answer: Yes, a Thailand eSIM is worth it. Thailand is not part of the EU roaming zone. If you use your German SIM card to surf in Thailand, you can quickly rack up costs of 10–15 euros per day. A VoiSim Thailand eSIM, by contrast, costs 6 dollars for 1 GB (7 days) or 13 dollars for 10 GB (30 days). Activation via QR code in 60 seconds; network: AIS 5G and TrueMove 4G.
View Thailand eSIM data packages →
What does roaming in Thailand cost with a German SIM?
Thailand is a popular travel destination for German vacationers. Bangkok, Chiang Mai, Phuket, Koh Samui, Krabi – the islands and cities attract hundreds of thousands of people every year. But when it comes to the internet, things often get tricky once you arrive.
German mobile providers do not include Thailand in their EU flat rates. In concrete terms, this means:
- Telekom MagentaMobil: 14.99 euros per day for the DayPass option. For 14 days in Thailand, that’s almost 210 euros.
- Vodafone: 12.99 euros per day. Two weeks cost around 182 euros.
- O2: 9.99 euros per day, though only 1 GB is at high speed. After that, speeds are throttled to 32 kbit/s – virtually useless for anything other than WhatsApp text messages.
Anyone who just keeps surfing without a daily option will quickly pay double-digit amounts per megabyte with all three providers. A few Instagram stories and checking Google Maps once for your hotel address, and you’ve already spent 20–30 euros without even realizing it.
A look at the Telefonica roaming price list shows: outside the EU, prices are often around 12 euros per MB. A typical 5 MB WhatsApp check can then cost 60 euros. That is not a typo.
The Thailand eSIM from VoiSim: Prices & Packages
VoiSim offers six Thailand data packages. All operate on the AIS 5G network (the strongest provider nationwide) with TrueMove 4G as a fallback. Activation is via a QR code that you receive by email.
| Data volume | Validity | Price |
|---|---|---|
| 1 GB | 7 days | $6 |
| 3 GB | 15 days | $7 |
| 5 GB | 30 days | $9 |
| 10 GB | 30 days | $13 |
| 20 GB | 30 days | $21 |
| 50 GB | 180 days | $52 |
The packages are data-only (no phone number). WhatsApp, iMessage, Signal, and all messengers work as usual over the data connection. Your German number remains in the device – you can still be reached on it for calls and SMS.
Compare Thailand eSIM data packages now →
Which package is right for me?
The choice depends primarily on your travel style:
1–2 weeks beach vacation (hotel with Wi-Fi): For most of the time, you will be on hotel Wi-Fi. When out and about, you need data for Maps, WhatsApp, and restaurant searches. 1 GB or 3 GB is more than enough for 7–14 days.
Round trip (Bangkok – Chiang Mai – Khao Sok – Krabi): As soon as you are on the move, navigation, hotel communication, Booking.com, Instagram, and Google Translate will consume mobile data. 5 GB or 10 GB is a safe middle ground for a 2–3 week round trip.
Workation, digital nomad, or longer stay: If you are working in Thailand, you need data for Zoom, the cloud, Slack, and laptop hotspots. On top of that, there is evening streaming and social media. 20 GB or 50 GB (180 days) is the right choice for 1–6 months.
How to set up your Thailand eSIM
- Purchase before your trip: Select your package on the Thailand eSIM product page. You will receive the QR code by email immediately.
- Scan the QR code: Install the eSIM while on Wi-Fi at home. Activation starts automatically as soon as you are connected to the network in Thailand.
- After landing: Turn on data roaming for the eSIM. Deactivate data roaming for your German SIM card. Done.
Check if your smartphone is eSIM-compatible beforehand: View compatible devices. Most iPhones from the XS/XR onwards and Samsung Galaxy models from the S20 onwards support eSIM. Google Pixel, Huawei, and many current mid-range devices are also compatible.
Thailand eSIM vs. local SIM card: Which is better?
There are stalls for AIS, TrueMove, and dtac at the airport in Bangkok. A local prepaid SIM costs about 300–500 Baht (8–14 euros) for 15–30 days with 10–20 GB. That sounds cheap, but there are catches:
- Mandatory registration: You must present your passport. This takes 10–15 minutes at the counter.
- New number: You get a Thai phone number. Your German contacts will no longer reach you on WhatsApp via your usual number.
- Language: The activation pages and apps are often in Thai or English.
- Opening hours: If you arrive at night, the counters are closed. Then you are left without internet.
The eSIM solves all four problems: no registration, no new number you have to explain, instructions in German/English, and you install it on Wi-Fi before departure.
What about WhatsApp, Google Maps, and banking?
Everything that runs via the internet works with the Thailand eSIM just like at home:
- WhatsApp: Chats, groups, calls – everything is normal. Your number stays the same. More about this in the WhatsApp eSIM guide.
- Google Maps: Navigation, public transport routes, restaurant reviews. Saving maps offline on Wi-Fi beforehand saves data.
- Banking apps: Online banking and transfers work. You need your German SIM, which remains active in parallel, for TAN/SMS authorization.
- Video streaming: YouTube, Netflix, TikTok – it all works. If you stream in the hotel in the evening, make sure you have enough GB planned.
Fact check: AIS 5G network coverage in Thailand
AIS is Thailand's largest mobile operator with the best nationwide coverage. 5G coverage is concentrated in Bangkok, tourist areas, and larger cities. In rural areas and on remote islands, the network switches back to 4G/LTE. This is sufficient for all normal applications.
TrueMove 4G takes over in regions where AIS signal is weaker. In practice, you will barely notice this – the eSIM automatically selects the best available network.
Practical tips for saving on mobile internet in Thailand
- Install before the trip, not at the airport. This way, setup is stress-free, and you don't have to hunt for Wi-Fi after landing.
- Deactivate data roaming for your German SIM. This is the most common mistake: the eSIM is active, but the German SIM continues to surf in the background and accumulates roaming charges.
- Use offline maps. Bangkok, Chiang Mai, Phuket, and Krabi can be downloaded in Google Maps beforehand. It saves data and works without a network.
- Pause automatic backups. iCloud, Google Photos, WhatsApp backups, and app updates can consume hundreds of MB in the background without you noticing.
VoiSim tip: You can install your Thailand eSIM while still at home and set it up at your leisure. After landing, simply turn it on – no stressful search for a shop or Wi-Fi hotspot at the airport.