Which eSIM provider gives you a local Thai phone number?

Nomad is currently the only international eSIM provider offering a local Thai phone number with select plans. This lets you receive SMS verification codes and use Grab, LINE and local services that require a local number.

Is there good eSIM coverage on Thai islands?

Yes. Koh Samui, Koh Phangan, Phuket and Koh Lanta all have very good 4G coverage. Koh Tao has decent coverage in the main village. AIS-backed plans generally provide the best island coverage.

Best Thailand eSIM 2026 | Plans, Coverage & Travel Guide

Q: Does Thailand support eSIM?

Yes. Thailand supports eSIM through AIS, DTAC/True, and NT Mobile. Coverage is very good across Bangkok, Chiang Mai, Phuket and all major tourist areas including the southern islands.

📡 Thai carriers and eSIM support

AIS is Thailand's largest and most reliable carrier, with the best nationwide coverage including northern highlands, southern islands and rural areas. DTAC merged with True Mobile in 2023 to form a combined network that is strong across Bangkok and all major tourist regions. NT Mobile (formerly TOT) is smaller but competitive on price.

Carrier	eSIM	Coverage	Best For
AIS	✓	Best nationwide	Islands, north, rural
DTAC/True	✓	Strong urban	Bangkok, cities
NT Mobile	Limited	Urban only	Budget option

☎️ The local phone number advantage

Nomad is currently the only international eSIM provider offering a local Thai phone number with select plans — a genuinely rare and useful feature. A local Thai number means you can:

    🚗
    Use Grab properly: While Grab accepts international numbers for registration, many Thai drivers prefer calling passengers on local numbers. A Thai number eliminates any booking friction.
  

    💬
    Use LINE: LINE is Thailand's dominant messaging and payment app. Many restaurants, hotels and local services only communicate via LINE — a local number makes registration instant.
  

    🏦
    Receive SMS verification codes: Banking apps, food delivery (Foodpanda, Robinhood), and local booking platforms all send SMS codes. A local Thai number means no workarounds.
  

🏝️ Island coverage guide

🌴Phuket: Excellent 4G across the entire island including beaches, Old Town and the airport. AIS and DTAC both perform strongly.

🌅Koh Samui & Koh Phangan: Very good coverage across resort areas and beaches. Full Moon Party venue on Haad Rin has solid 4G even during the event.

🤿Koh Tao: Good coverage in Mae Haad village and resort areas. Drops off at remote dive sites on the southern tip. Download offline maps before exploring.

🐘Koh Lanta & Koh Phi Phi: Solid coverage in main areas. Phi Phi Don has good signal; remote beaches on Phi Phi Leh are limited.

⛵Remote southern islands: Similan Islands, Tarutao and the far-south archipelago have very limited or no coverage. Download everything before boarding ferries.

🏔️ Northern Thailand coverage

Chiang Mai city has excellent 4G coverage across all areas. Doi Inthanon National Park, Thailand's highest peak, has 4G signal at the summit on AIS. The Chiang Rai area including the White Temple and Golden Triangle has strong coverage.

Remote hill tribe villages in Mae Hong Son province and the mountainous Pai valley area have limited coverage — 2G/3G in some areas, gaps in others. Always download offline maps (Maps.me or Google Maps offline) before heading into the highlands.

🏆 Best eSIM providers for Thailand

Nomad — Best overall for Thailand

The only international provider with a local Thai phone number. Strong AIS network partnership, excellent island coverage, and flexible plan sizes. Essential if you plan to use Grab, LINE, or any local service requiring SMS verification.

Local Thai numberAIS networkIsland coverage

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Holafly — Best for unlimited data

Unlimited data plans with hotspot sharing included. Fair-use throttle around 3–5GB/day. Best for digital nomads working from cafes or travellers who want to stream without tracking usage. More expensive than capped options.

Unlimited dataHotspot includedNo data counting

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Saily — Best budget option

Best price per GB among major providers. Built by NordVPN with built-in ad-blocker and web protection. Covers Thailand as part of its 19-country Asia plan. Good choice for light data users who want security features included.

Best per-GB valueAd-blocker included19 Asia countries

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WorldSIM — Best for an international number

For a local Thai number (Grab, LINE, SMS verification), Nomad above is the pick. WorldSIM is different: it gives you a permanent UK (+44) number, an optional US +1 and free incoming calls in 110+ countries, on worldwide coverage that includes Thailand, with lifetime-validity credit. Best if you want one international number across many trips rather than a local Thai SIM — and you're happy to pay above the data-only options.

Calls & SMSUK & US numberWorldwide

Visit WorldSIM →

❓ Frequently asked questions

Does Thailand support eSIM?+

Yes. Thailand supports eSIM through AIS, DTAC/True and NT Mobile. Coverage is very good in all major cities and tourist areas. AIS has the strongest nationwide reach including islands and northern highlands.

Which provider gives me a local Thai number?+

Nomad is currently the only international eSIM provider offering a local Thai phone number with select plans. This is essential if you want to use Grab properly, register for LINE, or receive SMS verification from Thai services.

Is there coverage on Thai islands?+

Yes. Phuket, Koh Samui, Koh Phangan and Koh Lanta all have very good 4G. Koh Tao has coverage in main areas. Remote dive sites and uninhabited islands have gaps — download offline maps before heading out on boats.

Is eSIM coverage good in Chiang Mai?+

Excellent. Chiang Mai city has full 4G coverage on all networks. Doi Inthanon national park has signal at the summit on AIS. Remote highland villages in Mae Hong Son can have gaps.

Bottom line

Thailand is one of Southeast Asia's best eSIM destinations — and Nomad's local number feature makes it the standout choice.

Coverage is excellent across Bangkok, all major islands, and northern cities. The unique Nomad local Thai number unlocks Grab, LINE and local services in a way no other international eSIM can match. For unlimited data users, Holafly is the alternative. For budget travellers, Saily delivers the best price per GB.

Thailand
eSIM Guide
2026