DTAC — International Roaming
📱 SIM cards in Bangkok — AIS, DTAC & True Move H tourist & monthly plans
📱AIS — Best CoverageTourist SIM (8-day ฿299, 30-day ฿699); Unlimited plans from ฿399/month
AIS — Best Coverage
Tourist SIM (8-day ฿299, 30-day ฿699); Unlimited plans from ฿399/month
Thailand's largest carrier by network quality. Best coverage outside Bangkok in rural areas and resort islands. Speed typically fastest among Thai carriers. Tourist SIMs available at Suvarnabhumi Airport (Arrivals Level 2), 7-Eleven, and AIS shops. Long-term residents prefer AIS for reliability across Thailand.
💡 Buy at the airport on arrival — AIS booth in the arrivals hall has English-speaking staff. The ฿299 8-day tourist SIM has adequate data for a short trip (15GB high-speed). Long-stay: AIS prepaid unlimited at ฿599/month is the most popular budget plan among expats.
🌐DTAC — International RoamingTourist SIM ฿279–599; Monthly plans from ฿299
DTAC — International Roaming
Tourist SIM ฿279–599; Monthly plans from ฿299
DTAC (now merged with True to form dtac-True) historically best for international roaming deals. Budget plans are slightly cheaper than AIS. Coverage is competitive in Bangkok but weaker in very rural areas. The dtac app has good English interface. Popular with budget travelers and short-term visitors.
💡 DTAC tourist SIMs are widely available at airports and 7-Eleven stores. Topup via 7-Eleven or online. If your main usage is in Bangkok, DTAC's budget plans offer excellent value — coverage in the city is comparable to AIS.
⚡True Move H — Data SpeedsTourist SIM ฿299–799; True Unlimited from ฿349/month
True Move H — Data Speeds
Tourist SIM ฿299–799; True Unlimited from ฿349/month
Following the DTAC-True merger, the combined network covers the most towers in Thailand. True Move H often wins speed tests in Bangkok — particularly in dense urban areas. True's unlimited plans are competitively priced. Popular in tourist areas (Phuket, Koh Samui) as True had the strongest island coverage pre-merger.
💡 True unlimited plans (often available through LINE promotions or True shop walk-ins) can be as low as ฿349/month for 1Mbps throttled unlimited + 15GB full-speed. If data speed is the priority, True often wins speed benchmarks in Bangkok.
• All Thai carriers require passport registration for SIM purchase — this is mandatory by law.
• eSIM: AIS, DTAC, True all offer eSIM tourist options — purchase online before arrival at their websites for immediate digital activation.
• Tethering: all tourist SIMs allow hotspot/tethering — share your SIM connection with laptop for remote work.