Can I use my home country SIM card in Thailand?

Yes, but roaming charges are expensive - often $10-15 per day. Local SIM cards cost much less and work better.

Do I need to unlock my phone for Thai SIM cards?

Yes, your phone must be unlocked. Contact your carrier before traveling. iPhones bought directly from Apple are usually unlocked.

Which Thai carrier has the best coverage?

AIS has the best rural coverage, especially for island hopping. DTAC is cheapest in Bangkok. True offers good speeds in major cities.

Can I keep my WhatsApp number with a Thai SIM?

Yes, WhatsApp stays linked to your original number. You'll receive verification codes via the app, not SMS.

Is eSIM available in Thailand?

Yes, services like Airalo, Holafly, and local carriers offer eSIM. Good backup option but physical SIM cards are often cheaper and more flexible.

How to use phones and internet in Thailand

Buy a local SIM card at the airport for 300-500 baht with 15-30GB data, or use eSIM services like Airalo. WiFi is widely available in hotels, cafes, and malls. Major carriers are AIS, DTAC, and True.

Get a local SIM card at arrival. Head to SIM card booths in Suvarnabhumi or Don Mueang airports before leaving. AIS, DTAC, and True all have counters. Ask for a tourist package with data and local calls. Staff will help set it up and test it works.
Choose your data package. Tourist SIM packages run 300-500 baht for 15-30GB valid 7-15 days. AIS has the best coverage in rural areas. DTAC is cheapest in cities. True offers good speeds in Bangkok. Buy more data at 7-Eleven stores using the carrier's app.
Set up your phone for Thailand. Turn off data roaming before you land to avoid charges. Once you have local SIM, turn on mobile data. Download Google Translate, Grab app, and your carrier's app for topping up. Save important numbers in Thai format starting with +66.
Find reliable WiFi. Most hotels, guesthouses, cafes, and shopping malls offer free WiFi. Ask for the password - it's usually provided freely. Speed varies but is generally good enough for calls and browsing. Avoid using public WiFi for banking.
Make international calls cheaply. Use WhatsApp, Line (popular in Thailand), or Skype over WiFi or data. For actual phone calls, buy international calling credit through your carrier's app or use apps like Rebtel. Avoid hotel phones - they're expensive.

Can I use my home country SIM card in Thailand?: Yes, but roaming charges are expensive - often $10-15 per day. Local SIM cards cost much less and work better.
Do I need to unlock my phone for Thai SIM cards?: Yes, your phone must be unlocked. Contact your carrier before traveling. iPhones bought directly from Apple are usually unlocked.
Which Thai carrier has the best coverage?: AIS has the best rural coverage, especially for island hopping. DTAC is cheapest in Bangkok. True offers good speeds in major cities.
Can I keep my WhatsApp number with a Thai SIM?: Yes, WhatsApp stays linked to your original number. You'll receive verification codes via the app, not SMS.
Is eSIM available in Thailand?: Yes, services like Airalo, Holafly, and local carriers offer eSIM. Good backup option but physical SIM cards are often cheaper and more flexible.