eSIM vs Physical SIM: Which Is Better?

How much does an eSIM or physical SIM cost for a typical Thailand trip?

AIS sells six tourist data plans that come in identical pricing whether you choose the eSIM or the physical card, ranging from 49 Baht for a one day, 1 GB plan up to 1,599 Baht for a longer validity option. The mid-tier AIS Tourist SIM costs 299 Baht for 8 days with 15 GB, while the AIS Super Tourist SIM is 699 Baht for 15 days with 30 GB, and the AIS Giga Tourist SIM runs 999 Baht for 30 days with 50 GB.

True and dtac tourist SIM cards are priced from 49 Baht up to 1,199 Baht across twelve tiers, with True's own physical plans specifically ranging from 449 Baht to 1,199 Baht depending on validity. Global eSIM marketplaces undercut both carriers on entry price: Saily starts at US$2.99 for 1 GB over 7 days, Airalo lists plans from US$4.00, and Nomad offers eSIMs from US$5. Holafly skips data caps entirely, charging by day for unlimited data at US$3.90 for one day up to US$74.90 for 30 days.

Which option offers better network coverage across Thailand?

AIS has the most extensive network in Thailand, including remote areas, national parks, and smaller islands where other carriers can drop signal, and it won the Opensignal Coverage Experience award outright in the June 2025 report. AIS also led download and upload speed in the same report, averaging 105.3 Mbps down and 22.4 Mbps up. True and dtac closed most of the speed gap after their October 2025 network integration completed, and dtac remains the sole winner for video streaming experience in Thailand.

Do I need to show my passport either way?

Thailand's National Broadcasting and Telecommunications Commission requires every SIM, physical or eSIM, to be registered with a valid passport, and True's terms cap this at a maximum of three SIMs per person per brand. AIS adds a further rule: tourists who keep using a Tourist SIM beyond 60 days from activation must reconfirm their identity, either by sending their passport number to 4444161 or visiting an AIS Shop in person.

The practical difference shows up at the point of sale. A physical SIM means handing your passport to a counter staff member at the airport or a True dtac shop, while an eSIM usually asks you to upload a passport photo inside an app during activation. Some travelers report this photo upload step failing on AIS's own eSIM portal, so keep the physical option as a backup if your passport photo won't upload.

What mistakes do travelers make when choosing between eSIM and physical SIM?

The most common mistake is buying a physical SIM at the arrivals hall without comparing prices first, since airport counters in Thailand are known for marking up tourist SIMs above the same plans sold at 7-Eleven or official brand stores in the city. A close second is assuming a locked phone from a home carrier will accept any Thai SIM or eSIM profile; it will not, and the card or profile simply fails to register.

The other trap is misreading "unlimited" data. Airalo's unlimited Thailand eSIMs run at full speed only up to 3 GB per day before throttling to about 1,000 kbps, and Holafly caps hotspot sharing at 500 MB per day even on its unlimited plans. If you plan to tether a laptop for work, check the daily high-speed cap and hotspot allowance before assuming an unlimited label means no limits at all.

Which should I choose for a short trip vs. an extended stay?

For a trip under two weeks, a marketplace eSIM is usually the simplest and cheapest route: Saily's 5 GB, 30-day plan runs US$7.99 and Airalo's 20 GB, 30-day plan is US$18.00, both installed before departure with no store visit needed. Short stays rarely need a Thai phone number, so a data-only eSIM covers maps, messaging apps, and social media without any extra step.

For stays beyond a month, or for digital nomads who need large data volumes, Nomad's 50 GB, 10-day plan at US$12 can be repurchased as needed, or a physical SIM from AIS or True-dtac can be topped up at any 7-Eleven once the initial validity runs out. A physical card also makes sense if you want a local phone number for apps like Grab or LINE that ask for SMS verification during signup.