AIS (Advanced Info Service) is Thailand’s largest mobile network operator with the widest coverage across the country, making it the safest choice for travellers exploring beyond Bangkok.
Pricing:
- 1-day/1GB: 49 baht (~US$1.50)
- 8-day/15GB: 299 baht (~US$9.50) – most popular
- 30-day/50GB: 899 baht (~US$28.50)
- Extended plans: up to 1,699 baht
What’s included:
- Unlimited calls within AIS network
- Credit for local calls to other networks
- Strong 5G in cities, reliable 4G in rural areas
Where to buy: Suvarnabhumi Airport (gates 6-7), Don Mueang, Phuket, Samui airports, AIS shops, 7-Eleven stores nationwide.
TrueMove H 5G SIM
TrueMove H operates Thailand’s second-largest network with fast speeds in urban areas and major transport routes. In 2023, TrueMove H merged with DTAC to form True Corporation, though both brands continue operating separate tourist SIM products.
Pricing (unlimited data):
- 8 days: 449 baht (~US$14)
- 15 days: 699 baht (~US$22)
- 30 days: 1,199 baht (~US$38)
What’s included:
- Unlimited data (fair use policy applies after heavy daily usage)
- Unlimited local calls
- 100 baht credit for international calls
- Free access to thousands of True Wi-Fi hotspots
Where to buy: Suvarnabhumi and Don Mueang airports, True shops in malls, and convenience stores.
DTAC SIM
DTAC merged with TrueMove H in 2023, but the DTAC Happy Tourist SIM remains available as a budget-friendly option with pricing now matching True.
Pricing (unlimited data):
- 8 days: 449 baht (~US$14)
- 15 days: 699 baht (~US$22)
- 30 days: 1,199 baht (~US$38)
What’s included:
- Unlimited data with a fair use policy
- Unlimited local calls
- 30 minutes international calls to China, Hong Kong, Macau, Taiwan, India, South Korea, Vietnam
Where to buy: Airports, DTAC shops, 7-Eleven stores.
Pricing:
- 7 to 15 day plans: 150 to 399 baht (~US$4.50 to US$12.50)
What’s included:
- Primarily 4G coverage (5G in select urban areas only)
- Unlimited data with reduced speeds after caps
- Sufficient for maps, messaging, and light browsing
Where to buy: Airports, convenience stores.
TOT Mobile SIM
TOT Mobile targets travellers wanting flexible short-term plans without committing to standard weekly or monthly packages.
Pricing:
- Daily, weekly, monthly plans: 200 to 500 baht (~US$6 to US$16)
What’s included:
- Reliable 4G with expanding 5G in major cities
- Flexible validity matching your exact trip length
Where to buy: Airports, TOT shops, convenience stores.
eSIM options for Thailand
Holafly eSIM
Holafly is one of the most popular eSIM providers for Thailand, offering unlimited data without buying a physical SIM card.
Pricing:
- 1 day: ~US$3.90
- 5 days: ~US$19.50
- 10 days: ~US$36.90
- 50 days: ~US$96
- Better daily rates for longer stays
What’s included:
- Unlimited data (fair use ~2.5-10GB/day)
- Up to 500MB/day hotspot sharing
- 24/7 English customer support
- Operates on the TrueMove H network
Best for: Convenience over savings, multi-country Asia trips, travellers who want to set up before arrival.
Airalo eSIM
Airalo offers both fixed-data and unlimited eSIM plans operating on the AIS network with strong 5G coverage.
Pricing:
- 1GB/3 days: US$4
- 10GB/7 days: US$9
- Unlimited 3 days: US$10.50
- Unlimited 7 days: US$24
What’s included:
- Choice between capped and unlimited plans
- AIS network (best coverage)
- Easy top-up through the mobile app
Best for: Light users, flexible data amounts, and an affordable eSIM option.
Jetpac eSIM
Jetpac focuses on fixed-data plans with competitive pricing for longer stays.
Pricing:
- 1GB/4 days: US$4
- 3GB/7 days: US$8
- 10GB/30 days: US$22
- 40GB/30 days: US$64
- JetFlex subscription: US$15/month (for frequent travellers)
What’s included:
- Dual-network (AIS + TrueMove H)
- Automatic connection to the strongest signal
- Monthly subscription option
Best for: Longer stays, frequent Asia travellers, dual-network reliability.
Price comparison
| Provider | Type | Minimum Price | Maximum Price | Best For |
|---|---|---|---|---|
| AIS 5G SIM | Physical | 49 baht (~US$1.50) | 1,699 baht (~US$54) | Wide coverage, rural travel |
| TrueMove H 5G SIM | Physical | 449 baht (~US$14) | 1,199 baht (~US$38) | Southern Thailand, unlimited data |
| DTAC SIM | Physical | 449 baht (~US$14) | 1,199 baht (~US$38) | Budget unlimited plans, Asian calls |
| My by CAT SIM | Physical | 150 baht (~US$4.50) | 399 baht (~US$12.50) | Extreme budget travellers |
| TOT Mobile SIM | Physical | 200 baht (~US$6) | 500 baht (~US$16) | Flexible day/week plans |
| Holafly eSIM | Digital | ~US$3.90/day | ~US$96 (50 days) | Convenience, unlimited data |
| Airalo eSIM | Digital | US$4 (1GB) | US$45 (20GB) | Light users, flexible data amounts |
| Jetpac eSIM | Digital | US$4 (1GB) | US$64 (40GB) | Longer stays, monthly subscriptions |
Where to buy SIM cards in Thailand
At the airport: This is the most convenient option for most travellers. You’ll find official counters for AIS, True, and DTAC in the arrivals halls at Suvarnabhumi Airport (Bangkok), Don Mueang Airport (Bangkok), Phuket International Airport, and Chiang Mai Airport. Look for brightly lit kiosks near the exits. Staff speak English and can help you choose the right plan. Registration takes 10-30 minutes and requires your passport.
In the city: All major providers operate retail shops in shopping malls and business districts. You’ll also find SIM cards at 7-Eleven convenience stores, though staff may not speak English and the selection is often limited to basic plans.
Online before your trip: eSIMs can be purchased from Holafly, Airalo, Jetpac, and other providers through their websites or mobile apps. Physical SIM cards are also available from online retailers like Amazon, though delivery times may take a week or more.
Cost tip: Airport SIM cards are typically 20-30% more expensive than buying from official shops in the city or through provider mobile apps. However, the convenience of getting connected immediately upon arrival is usually worth the small premium for most tourists.
Registration requirements
Thai law requires all SIM cards to be registered with a valid passport. When you purchase a SIM card, the retailer will:
- Take a photocopy of your passport
- Have you filled out a brief registration form
- Register the SIM card in the national database using biometric data
- Activate the SIM card (usually within 5-15 minutes)
Foreigners are limited to purchasing five SIM cards per operator. If you’re travelling with family or friends, one person can purchase multiple SIMs in a single transaction.
For tourist SIMs, Thai regulations require identity re-verification if you want to use the SIM beyond 60 days from activation. This can be done by SMS or by visiting an operator shop.
Choosing the right SIM card for you
For most tourists (1-2 weeks): AIS 8-day or 15-day plan offers the best balance of coverage, data, and value. The 299 baht 8-day/15GB plan is sufficient for navigation, social media, and video calls.
For budget travellers: My by CAT or DTAC Happy plans provide the lowest prices, though you’ll trade off some speed and coverage in remote areas.
For digital nomads or heavy users: TrueMove H or DTAC 30-day unlimited plans at 1,199 baht give you a month of unrestricted data for work, streaming, and large file uploads.
For tech-savvy travellers who want convenience: Holafly or Airalo eSIMs eliminate airport queues and activate before you land, though you’ll pay a premium for this convenience.
For rural or island travel: AIS provides the most reliable coverage in national parks, mountain regions, and smaller islands where other networks may have gaps.
Advantages of using local SIM cards
Buying a Thai SIM card instead of using international roaming offers several concrete benefits. Local SIM cards cost 90% less than international roaming for equivalent data usage. A week of data that might cost US$100+ through your home carrier costs US$9 to US$20 with a Thai tourist SIM.
Thailand’s 4G and 5G networks provide fast, reliable connectivity that often exceeds what you’d get through roaming agreements. Even in rural areas, local networks are optimised for domestic use and consistently outperform roaming connections.
All tourist plans include local calling, which makes it easy to book restaurants, contact hotels, or arrange transport without worrying about per-minute charges. Many plans also include international calling credit or minutes to specific countries.
If issues arise, Thai mobile operators have English-speaking customer service available through their shops, hotlines, and mobile apps. This is far easier than trying to troubleshoot roaming problems with your home carrier’s support team while overseas.
Ready to stay connected in Thailand?
Choosing the right SIM card for Thailand comes down to balancing your budget, data needs, and travel plans. If you’re sticking to cities and tourist areas, any of the major providers (AIS, True, DTAC) will serve you well. For remote travel, AIS offers the most reliable coverage. If you want the simplest setup, eSIM options from Holafly or Airalo let you activate before you even board your flight.
The most important thing is to buy a local SIM card or eSIM rather than relying on expensive international roaming. With tourist plans starting from as little as 150 baht and unlimited data available for under US$40 per month, staying connected in Thailand is affordable and straightforward.
Sources:
• AIS Thailand Official Tourist Plans
• TrueMove H Thailand SIM Official
• Traveltomtom – Best SIM Card for Thailand 2026
• Holafly – Thailand SIM Card Guide
Source: The Thaiger