Answered13 days ago

What is the best SIM card to get in Thailand and do they expire every 30 days?

SIM Card Thailand Expats Mobile Service Topping Up AIS

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Understandin************

asked Oct 14, 2026

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What’s the best sim card to get? Do most sim cards expire every 30 days - can I just top it up or do I need to buy a sim every 30 days?

Answer summary

In Thailand, the best SIM card often varies based on personal needs, but many users recommend AIS for its reception and data options. SIM cards generally do not expire within 30 days if you keep them topped up. You can opt for plans that last longer, such as annual plans from AIS or DTAC, which provide data for extended periods as long as you maintain your balance. Users have shared positive experiences with various providers, including AIS, DTAC, and True, each offering different benefits. Always ensure to top up your SIM to maintain its validity.

14 repliesnewest first

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Lars-Göran ************

A normal DTAC sim, 50 baht. Than top up with what you need. Each top up gives you 30 more days validity. You can keep the sim for years, just make sure it is still valid.

12 days ago

Scott *******

My iphone 17 has a esim, so i have USA number and a Thailand number.

13 days ago

Ant ***********

If you are here long term

Get a yearly deal with a telco

I pay 2500 baht incl vat

For 12 months

AIS

13 days ago

Luc ************

Go to your local

****

. Download the app of the provider and top up after 30 days. I top up every year for a year.

13 days ago

Tony *********

I always use Saily esim,is the best, if you want tell me to send you link to have some benefits also

13 days ago

Dave *********

True 30 unlimited tourist sim then decide if suits u if so go onto true shop convert to post payed unlimited under 500 a month

13 days ago

John **********

The best sim card is the one that has the best reception in the areas you are most frequently in. AIS one2call is the best in my view, you don't need a contract just top up your call credits as required and you can add on an annual data option

13 days ago

Andy ********

Walk into ais payed 2400 baht for a one year sim gives me calls and plenty of internet.

13 days ago

Kolby ***********

This is a data esim from airalo. Not as cheap as buying local, but works fine.

13 days ago

Craig *********

Keep your sim topped up or it will expire

13 days ago

Phil ******

AIS UNLIMITED ฿3500 per 360 days @

13 days ago

Jay ********

I use DTAC easy to use especially when downloading the app

Sim do not expire like I experienced in Dubai a real pain

13 days ago

Peggy *********

I have a 1 year plan from AIS. I went to the their shop and asked for a Sim Thep. I forget what I paid, it wasn't much. It is data for 364 days then you top up. I also added 50 baht for calls & sms. I have only made one call, that was to my bank back in Australia & I still have calls credit. True were absolutely useless & tried to push a tourist package.

13 days ago