Thailand has some of the best eSIM prices in the world and one of the strongest mobile networks in Southeast Asia. If you arrive without data, Bangkok’s airports have AIS, True and DTAC counters at arrivals — but they require your passport and usually have a queue. An eSIM bought before you fly solves all of that before you leave home.
This guide covers everything you need to decide before buying: which network to use, how much data for your trip, coverage zone by zone, and what the same plans cost at the main competitors.
Thailand’s mobile networks: AIS, True and DTAC
Thailand has three main carriers. Unlike many destinations where network choice barely matters, here there are real differences depending on where you’re going.
AIS has the widest rural coverage and the strongest signal on the islands. If your trip includes remote areas — Koh Lanta, northern Chiang Rai, Doi Inthanon National Park — AIS outperforms the others. It also has the most extended 5G network in Bangkok.
True (merged with DTAC since 2023) has excellent coverage in Bangkok and the main tourist destinations (Phuket, Krabi, Koh Samui, Chiang Mai). For the typical traveler moving between cities and popular beaches, True is completely sufficient.
DTAC now operates on the same infrastructure as True since the merger. Many products still sell under the DTAC brand but share towers with True.
Most international eSIMs, including MolaHop, automatically route through the strongest available network in each area. You don’t need to manually select a carrier — your phone connects to the best signal.
How much data do you actually need in Thailand
Thailand is a destination where data consumption varies more than most countries depending on your trip type. Two variables change everything: how often you use Grab, and how good the WiFi is at your accommodation.
Grab is the most important app in Thailand. Taxis, motorbike taxis, food delivery — everything runs through Grab. No data means no cheap transport in Bangkok.
WiFi quality at hostels and hotels in Thailand is inconsistently good. In Bangkok, city hotels usually have solid connections. On the islands — Koh Phangan, Koh Tao, Koh Chang — WiFi can be slow or nonexistent in areas away from the main beach strip.
Realistic estimates by trip type:
Bangkok and main cities, 7–10 days (BTS Skytrain, Grab, Google Maps, Instagram, WhatsApp): 5–8 GB. The city has excellent coverage and map usage is constant — Bangkok’s street layout without GPS is genuinely confusing even for locals.
Island hopping route, 10–14 days (Phuket → Krabi → Koh Phi Phi → Koh Samui or similar): 8–15 GB. Ferry tickets are bought online, rented motorbikes need maps constantly, and WiFi at more remote beaches is unreliable.
Northern route, Chiang Mai and mountain villages (temples, trekking, elephant sanctuaries): 5–10 GB. Less Grab, more maps in low-signal areas. Download Google Maps offline before heading into mountain routes.
Long trip of 21+ days or digital nomad: unlimited or 20GB minimum. If you’re working remotely, MolaHop’s unlimited plan is charged per day, which makes it the most flexible option — activate only the days you actually need it.
Coverage zone by zone
Bangkok. 5G coverage across the entire city. The BTS Skytrain, MRT and Chao Phraya river boats all have signal. The main tourist areas — Khao San Road, Sukhumvit, Silom, Chatuchak — are seamless. Shopping malls have their own WiFi but with an eSIM you won’t need it.
Chiang Mai. Excellent 4G/5G coverage in the city and immediate surroundings. On mountain routes to the north — Doi Inthanon, Mae Hong Son, hill tribe villages — signal becomes intermittent as you climb. AIS has the best performance in these areas.
Phuket. Full coverage across the entire island. Patong, Kata, Karon, the airport, the town center — no issues. Promthep Cape and the western cliffs have perfect signal for uploading sunset photos in real time.
Krabi and Ao Nang. Good coverage throughout. Railay Beach is accessible only by boat and has 4G mobile signal, though resort WiFi is usually sufficient for basics there.
Koh Phi Phi. 4G coverage in the village area and main beaches. At the Phi Phi Viewpoint there’s enough signal to post to Instagram. In the more secluded coves there may be occasional dropouts.
Koh Samui and Koh Phangan. Solid coverage at the main tourist spots. Koh Phangan has good coverage at Haad Rin (Full Moon Party area) but can be patchy on the more remote northern beaches.
Koh Tao. Basic 4G at the pier and main dive sites. In the island interior and less accessible coves, signal is weaker. Download offline maps before renting a motorbike.
Ayutthaya and historical routes. Good coverage. Temple complexes have sufficient signal for maps and photos throughout.
eSIM vs local SIM at the airport
The question many ask on arrival at Suvarnabhumi (BKK) or Don Mueang (DMK): was the eSIM from home better than buying a SIM at the airport?
Physical SIM at the airport: AIS, True and DTAC have counters at international arrivals. They sell tourist packages, but there’s a queue, they require your passport, and if you arrive at night the counters may be closed or understaffed.
eSIM from home: No queue, no passport, data active the moment you land — and you avoid arriving without data while searching for the AIS counter with all your luggage in the middle of the night.
One important difference from Turkey: eSIMs in Thailand are not government-blocked. You can buy, top up and manage your eSIM from inside the country with no restrictions. If you run out of data on Koh Phi Phi, you can buy more directly from your phone.
MolaHop Thailand prices
| Plan | Validity | Price |
|---|---|---|
| 1 GB | 7 days | €4.29 |
| 3 GB | 15 days | €4.49 |
| 3 GB | 30 days | €5.19 |
| 5 GB | 30 days | €6.19 |
| 10 GB | 30 days | €9.29 |
| 20 GB | 30 days | €15.49 |
| 50 GB | 30 days | €55.29 |
| 50 GB | 180 days | €58.09 |
| Unlimited | per day | €3.49/day |
The most popular plan for a standard 10–14 day trip is the 10GB / 30 days. It covers most routes without running short.
Want to see how much you save versus your carrier’s roaming? Work it out here: eSIM vs roaming calculator
👉 Get your Thailand eSIM from MolaHop
Price comparison: MolaHop vs Airalo vs Holafly vs Nomad vs SimLocal
| Plan | MolaHop | Airalo | Holafly | Nomad | SimLocal | Verified |
|---|---|---|---|---|---|---|
| 5 GB / 30 days | €6.19 live price | €7.50 source | Unlimited only source | €7.02 source | US$8.00 (≈ €7.08) source | |
| 10 GB / 30 days | €9.29 live price | €10.00 source | Unlimited only source | €8.77 source | US$10.25 (≈ €9.07) source | |
| Unlimited / 7 days — Nomad had no 7-day unlimited plan (it sells 10 and 30 days). SimLocal: its "Unlimited" plan with 5GB/day at high speed. | €24.43 live price | €19.00 source | €25.50 source | — source | US$20.75 (≈ €18.37) source |
Competitor prices captured on 1 October 2026 from each brand's own website (the "source" link). MolaHop prices marked "live price" are current. SimLocal shows US dollars; the euro figure is our conversion at the ECB rate of 1 October 2026 (1 € = 1.1298 US$).
On 1 October 2026 MolaHop was the cheapest of the five on 5GB / 30 days. On 10GB, Nomad and SimLocal were cheaper; on 7-day unlimited, Airalo and SimLocal were cheaper and only Holafly cost more.
A note on unlimited plans: almost all providers apply a Fair Use Policy (FUP) in Thailand. MolaHop’s unlimited works by days activated — turn it on only the days you need heavy data and use hotel WiFi the rest of the time.
How to install your Thailand eSIM
iPhone:
- Buy at molahop.com or WhatsApp. You receive the link by email and WhatsApp.
Settings → Mobile Data → Add eSIM→ scan the QR or use the direct link.- Name the line (e.g. “Thailand”).
- On the plane before landing: set the eSIM as your active data line and enable data roaming.
- Airplane mode on/off after landing. Connected.
Android (Samsung, Pixel, Xiaomi):
Settings → Connections → SIM Manager → Add eSIM.- Scan the QR or enter the code manually.
- Select the eSIM as data line in
SIM Manager → Mobile Data. - Enable data roaming in
Mobile Networks. - Airplane mode on/off after landing.
One tip that makes a difference: install the profile at home on stable WiFi, but don’t activate the line until you’re on the plane or at Bangkok airport. The plan starts counting from your first connection to a Thai network, not from installation.
Essential apps that need data in Thailand
Grab — transport and food. Essential in Bangkok. No data means no Grab. No Grab means Bangkok taxi drivers can charge whatever they want.
Google Maps — download offline maps of Bangkok, Chiang Mai and Phuket before you go. For motorbike routes on islands, having offline maps is genuine safety.
Google Translate — camera mode works well with the Thai alphabet. Uses data but it’s the most useful tool in local restaurants and on road signs.
Agoda / Booking — for last-minute hotels. In high season (November–January) prices rise fast and booking from a ferry with data is completely normal.
12Go — ferries, trains and buses between destinations. Online tickets with data, much cheaper than buying at the pier.
LINE — the dominant messaging app in Thailand. Local businesses, tour guides and motorbike rentals communicate on LINE, not WhatsApp. Worth installing before you go.
FAQ
Does the eSIM work on ferries between islands? Yes, while the boat is near the Thai coast. On longer crossings, far from the coast, there may be stretches without signal. This is normal and happens equally with local SIMs.
Can I use hotspot to share data with a travel companion? Yes, on compatible devices.
Does Thailand have 5G? Yes, in Bangkok and major cities. On the islands coverage is primarily 4G, which is more than sufficient for typical travel use.
Can I top up data if I run out? Yes, with no restrictions. Unlike Turkey, in Thailand you can access any eSIM provider from inside the country without blocks.
Does the eSIM work at Don Mueang airport (DMK)? Yes. Both Suvarnabhumi and Don Mueang have full coverage in international arrivals.
What about my Spanish banking apps? They work fine on Thai data. If your bank requires SMS verification, keep your Spanish SIM active in parallel to receive the codes.
Last updated: October 2026. MolaHop prices are live from molahop.com; competitor prices captured on 1 October 2026, with the source in each cell. Coverage verified with AIS, True and DTAC data July 2026.
