Thailand SIM comparison
A focused local-brand comparison for travelers choosing between dtac, AIS and a simpler Saily eSIM before landing.
What this guide covers
The short answer
dtac Happy Tourist
AIS Lucky Tourist
dtac vs AIS head-to-head
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You want the checked Happy Tourist package facts before comparing at the counter or on the provider page.
One of the currently listed Happy Tourist packages (8, 10, 15 or 30 days) matches your trip.
You are comfortable with dtac's tourist SIM registration note and carrying the required documents.
Trip length is the main filter and you want to compare Lucky Tourist SIM day packages.
You want AIS eSIM purchase links from the provider page, while checking VAT and current terms before payment.
You prefer to compare local Thai network brands directly instead of reading another broad eSIM ranking.
You want data ready before landing and would rather skip the airport SIM queue.
Your phone is unlocked, supports eSIM and you want setup handled before your first transfer.
You are comparing convenience, not trying to prove Saily is always cheaper than local SIMs.
Choose dtac if one of the currently listed Happy Tourist packages fits your stay and you are comfortable with dtac's tourist SIM registration note.
Choose AIS if you mainly want to compare Lucky Tourist SIM package length: AIS currently lists 1, 5, 8, 15, 30 and 60 day packages, with eSIM purchase links on all but the 60-day package.
Choose Saily if the calmer move is to install an eSIM before landing, avoid the airport SIM queue and keep maps, transfer messages and hotel details ready.
dtac currently lists Happy Tourist Infinite SIM for 8, 15 and 30 days and a 10-day Happy Tourist SIM, all shown with unlimited 5G internet at max speed and prices that include VAT.
dtac's registration page says prepaid tourist SIM users need registration and should bring passport, SIM card and SIM package.
dtac lists airport service points including BKK, DMK, Phuket, Samui, Chiang Mai and Krabi. Availability and terms can still change, so check the provider page before buying.
AIS currently lists Lucky Tourist SIM packages for 1, 5, 8, 15, 30 and 60 days.
Every package except the 60-day one has an eSIM purchase link on the AIS page.
AIS terms say VAT is extra and plan terms can change, so the live provider page matters more than any saved screenshot or old blog post.
We do not repeat AIS prices here because its terms say VAT is added on top; use the live AIS page for the amount you will actually pay.
The useful comparison is not a generic best eSIM claim. It is whether dtac's checked Happy Tourist entries or AIS's wider day-package spread better matches your actual stay.
dtac lists fewer package lengths (8, 10, 15 and 30 days), all shown with unlimited 5G internet at max speed and prices that include VAT.
AIS lists more package lengths (1, 5, 8, 15, 30 and 60 days), with VAT extra, terms that can change and no eSIM purchase link on the 60-day package.
For either local brand, assume the final provider page is the authority before payment or activation. For dtac prepaid tourist SIM registration, use the document note above.
Saily is our sponsored Thailand eSIM partner for travelers who want to set up mobile data before departure and avoid the airport SIM counter.
Saily comes from the Nord Security product family. The practical advantage here is convenience: install before landing, then follow Saily's activation instructions when you arrive.
We do not list Saily plan prices or allowances in this article because they change. Use Saily's checkout page for the current Thailand offer and use the coupon note shown with our CTA if it is still available.
Airalo and Holafly are also common Thailand eSIM names to compare, but we do not link to them here. Our partner relationship on this page is with Saily.
If you choose Saily, install the eSIM while you still have reliable Wi-Fi and keep the activation instructions handy.
If you choose dtac as a prepaid tourist SIM, keep your passport accessible and do not throw away the SIM package before registration is complete.
Save your transfer voucher, pickup point, hotel address and first-night contact details offline in case mobile data takes a few minutes to settle after landing.
Source note
AIS and dtac facts are reused from our Thailand Tourist SIM & eSIM page, last checked September 2026. Saily prices are intentionally omitted because current plan terms are shown on Saily. dtac and AIS are mentioned for information only; they are not affiliate partners on this page.
FAQ
No. This page is only a head-to-head planning guide for dtac Happy Tourist and AIS Lucky Tourist SIM choices, with Saily included as a no-registration alternative. For the broader Saily vs local SIM decision, use our best eSIM guide.
Use dtac if an 8, 10, 15 or 30 day Happy Tourist package matches your stay. Use AIS if a 1, 5 or 60 day Lucky Tourist package fits better. The final provider page is still the authority before payment.
dtac currently lists Happy Tourist Infinite SIM for 8, 15 and 30 days and a 10-day Happy Tourist SIM, all shown with unlimited 5G internet at max speed and prices that include VAT.
AIS currently lists Lucky Tourist SIM packages for 1, 5, 8, 15, 30 and 60 days, with eSIM purchase links on every package except the 60-day one. Its terms say VAT is extra and plan terms can change.
dtac's registration page says prepaid tourist SIM users need registration and should bring passport, SIM card and SIM package.
Saily can be simpler if your phone supports eSIM and you want setup before landing, without waiting at an airport SIM counter. We do not claim it is always cheaper than AIS or dtac.
No. They are common Thailand eSIM options travelers may compare, but this page only includes a Saily partner CTA and informational notes about local dtac and AIS tourist SIMs.
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Sponsored partner link. We may earn a commission at no extra cost to you; checkout, plan details and support stay with Saily.
