Getting a SIM card & home internet in Thailand.

What it is & why it matters

Connectivity is one of the easiest parts of settling in. Thailand has fast, inexpensive mobile data from three main carriers — AIS, TrueMove and (the dtac network, now merged with True) — and home fibre that's cheap and installed within days. Grab a tourist SIM at the airport to get going, then switch to a monthly plan once you're settled and have a Thai address. The one non-negotiable: install LINE immediately. It's the default messaging app for everything in Thailand — friends, landlords, condo offices, food delivery and even businesses all run on LINE.

Step by step

1. Buy a tourist SIM at the airport on arrival (bring your passport — SIM registration is required) so you have data immediately.
2. Once settled, switch to a monthly postpaid or prepaid plan from AIS or True for better value.
3. Choose a home-fibre provider — AIS Fibre, True or 3BB are the main options — and book installation.
4. Have your passport and address ready for fibre installation; it's often completed within a few days.
5. Install LINE first, then Grab (rides and food) and your bank's app — these three run daily life.
6. Set up PromptPay once your bank account is open to pay by QR code almost anywhere.

What it costs

Mistakes to avoid

• Sticking with the pricey airport tourist SIM long-term instead of switching to a monthly plan.
• Not installing LINE early and missing messages from your landlord, condo office or delivery drivers.
• Forgetting your passport when buying a SIM — registration is mandatory.
• Overpaying for a top-tier fibre speed you don't need; mid-tier plans are plenty for most homes.

Pro tips

• LINE is essential — landlords, building offices and even shops communicate through it.
• Carriers run kiosks in nearly every mall if you'd rather set up a plan in person with help.
• Many condos already have a fibre provider wired in — ask the juristic office before booking your own.

Frequently asked