This is NOT an official government website. We are an independent resource providing information and assistance to travelers.

What is the best SIM card to use when visiting Bangkok?

Aug 21, 2025
3 days ago
Naushad ******
ORIGINAL POSTER
Hi All. We visiting Bangkok this week. Please advise best simcard to use.
3,741
views
6
likes
88
all likes
43
replies
4
images
24
users
TLDR : Answer Summary
Visitors to Bangkok are generally recommended to choose between AIS and True for mobile SIM cards, as both offer good coverage in tourist areas. AIS is noted for slightly better rural coverage, while True is praised for its services. eSIM options are also available, which can be purchased before travel if the device supports it. It's commonly advised to buy SIM cards at local convenience stores like 7-Eleven rather than at the airport to save on costs.
Thailand Digital Arrival Card (TDAC)

WARNING: Only trust Thai government websites with .go.th domains or Thai agent websites with .co.th or .in.th domains, as these require verified Thai registration and cannot be registered anonymously.

The official TDAC form is available at tdac.immigration.go.th, which uses the official .go.th government domain.

The services by AGENTS CO., LTD. does NOT charge any fees for arrivals within 72 hours. If you need to book more than 72 hours in advance, there is a service fee of $8.

Do not trust other sites pretending to be a trustworthy agency. Pay attention to delivery time - the service operated by AGENTS CO., LTD. has 1 minute delivery time for arrivals within 72 hours.

Don't fall for sites pretending to be agents.co.th or the official government tdac.immigration.go.th website. Always double-check the exact domain in your browser.

Scam services may take days to process your application, others may not even do anything. With these TDAC scam services you also need to worry about double charges.

Please watch out for TDAC misinformation spread by fugitive Jesse Nickles and his many fake accounts on Quora, TripAdvisor, Reddit, and other platforms.

TRUSTED TDAC LINKS:

Official Government TDAC Form: tdac.immigration.go.th
Official TDAC form by AGENTS
Official TDAC information page by AGENTS (tdac.in.th)

Brian ********************
TeslaFi
Sean **********
I have both True and AIS. I prefer AIS because I find their app is better and easier to use.
Phil ******
@Naushad *****
AIS and go for unlimitedcdata plan while your here
Mark *******
Mobimatters esim I use it every time I go to Thailand
Kevin ******
True or AIS
Shane *************
HeShe Sim
Leonard ******
Don't bother about a phone let alone a sim card. Be free just for once
Charles **********
@Leonard *****
one that fits your phone
Jeff *************
Go to 7-11 get tourist card cheapest one and they are in the airport
Naushad ******
ORIGINAL POSTER
Naushad ******
ORIGINAL POSTER
Some idea of costs, we there for 10days.
Christer *****
Don't buy in airport.
****
is much cheaper. Bring passport
Naushad ******
ORIGINAL POSTER
@Christer ****
any idea on costs?
Christer *****
@Naushad *****
350 baht for one month
Jan **********
@Naushad *****
350 at
****
validity 1 month.
Roy *********
AIS
David *******
Ais
Max *************
It depends on where you're staying.In rural areas AIS or True, but imo in major cities Dtac is better than True. I'm staying in Jomtien and Dtac is way better than True. Dtac's app is very good, AIS's is ok but True's is a disaster.
Steve ***********
Dtac
Stuart *********
@Steve **********
Doesn’t exist these days. They merged with True.
Steve ***********
Just got home Sunday, was topping up at the store in central mall. I have the app on my phone????
Naushad ******
ORIGINAL POSTER
@Steve **********
costs please?
Steve ***********
@Naushad *****
Sim should be free, but who talks on the phone anyway. Download line
Steve ***********
Phil ******
@Steve **********
DTAC gone now.
Steve ***********
Dtac rama 3 central as of last week
Steve ***********
Phil ******
@Steve **********
yeh they maintain old accounts but new ones teue
Stuart *********
@Steve **********
AI is out of date. DTAC merged with True around 6 months ago.
Mark *******
Using Nomad eSIM but you lose your normal number, however WhatsApp etc is ok
Trevor **********
True is great
George *********
That is so true.
Pete **********
I have a monthly plan I love. AIS is very reliable SIM2Fly ซิมโรมมิ่งสำหรับเดินทางต่างประเทศ เล่นเน็ตทั่วโลก
**************************************
Colin **********
AIS and probably others offer eSims, these have the benefit that you can buy before you travel. Your phone obviously needs to be eSim capable.
Shane ********
@Colin *********
I see a lot of YouTubers advertising eSims. They make sense if you're travelling through a few countries, but I've briefly looked into them myself & they seem to be considerably more expensive than a local sim. Have you tried them yourself?
Colin **********
@Shane *******
no not yet
Pete **********
@Colin *********
and I am understanding Thailand banks are eventually going to require esim cards connected to devices used for banking to prevent fraud.
Bernard **************
@Pete *********
I purchased an eSim today, it works.

There is lots of speculation, nothing has changed in Bangkok.
Colin **********
@Pete *********
I've not heard that. But its logical because can offer a higher level of security, however, the current sim verification although cumbersome seem adequate, they probably phase it in rather do doing a big bang.
Pete **********
@Colin *********
I cant promise it but i just read the article. I will hunt it down now
Les ********
AIS
Cole *********
True or AIS
Stuart *********
Two options. AIS or True. Not much in them if you’re in the main tourist areas. Perhaps AIS have a slightly better rural coverage but it’s going to be pretty close.
Thai Visa Advice and Everything Else
... members · 60% approval rate
The Thai Visa Advice And Everything Else group allows for a broad range of discussions on life in Thailand, beyond just visa inquiries.
Join the Group
Thai Visa Advice and Everything Else
View the Conversation
Thai Visa Advice and Everything Else