Best Prepaid SIM Cards for Travelers Staying 1–3 Months in Thailand

If you're planning to stay in Thailand for one to three months — whether you're a backpacker, digital nomad, intern, or on an extended holiday — getting the right prepaid SIM card is one of the smartest things you can do upon arrival. A good SIM card ensures reliable internet access, smooth international calls, and the ability to use Google Maps, Grab, and other local apps without relying on spotty hotel Wi-Fi.

In this guide, we explore the best prepaid SIM cards available in Thailand in 2025, especially for travelers from France, the Netherlands, the UK, and Germany, who plan to stay longer than the average tourist.

Why Prepaid SIMs Are Better Than Tourist SIMs for Longer Stays

Tourist SIMs are designed for short stays — usually 7 to 15 days. They're often expensive, packed with more data than most people need in a week, and come with expiration dates. If you're staying 1–3 months, these SIMs are not cost-effective.

Instead, go for a prepaid SIM card with refillable credit. This gives you flexibility: you can top up data and call time as needed, activate monthly packages, and even switch between internet speeds. More importantly, it’s much cheaper in the long run.

What Kind of Plan Should You Choose?

If you're staying for 1 month:

• Go for a monthly unlimited plan at 299–499 THB

• Choose 4 Mbps or 10 Mbps depending on your usage

• Add small voice call packages if needed

If you're staying 2–3 months:

• Pick a SIM that lets you auto-renew or top up easily via app

• Consider plans with international calling to Europe if you’ll call home

• Use Shopee or Lazada for topping up (sometimes cheaper than apps)

If you’ll be traveling between cities, choose AIS for the best signal nationwide. If you’re mostly staying in urban zones, DTAC or TrueMove H offer better pricing and promos.

Tips for a Smooth SIM Experience

• Install your provider’s mobile app right after activation: this is where you’ll control top-ups, data packages, and see your remaining balance.

• Buy top-up vouchers at 7-Eleven or pay online with a card.

• Turn on roaming in settings only if you’ll leave Thailand (like visiting Laos or Cambodia briefly).

• Check for English support in the app — all major providers have English menus in 2025.

• Back up your SIM registration — take a photo of the receipt and SIM number.

Can You Use the SIM in Other Devices?

Yes. Thai prepaid SIMs work in:

• Dual-SIM phones

• Pocket Wi-Fi devices

• iPads/tablets

• Laptops with SIM slots

Make sure your device is unlocked for global use before inserting a Thai SIM.

Final Thoughts

If you're a traveler or expat from France, the Netherlands, the UK, or Germany staying in Thailand for 1–3 months, don’t settle for overpriced tourist SIMs. Prepaid SIM cards from AIS, DTAC, or TrueMove H offer better value, more flexibility, and seamless top-up options — all with coverage across Thailand. Whether you're here for a sabbatical, freelance work, or digital detox, staying connected on a budget is easy in 2025.