Thailand SIM Card & eSIM Guide: Prices Compared (2026)

Choosing the right Thailand mobile plan boils down to one essential question: do you genuinely need a Thai phone number for local calls, or is dependable, high-speed data your only priority? local tourist SIMs from giants like AIS, True, and dtac are your best bet when you want the security of a local number and hands-on counter support. International eSIMs, meanwhile, offer the immense relief of being installed before you even leave home, though most are data-only.

For a standard short trip, do not buy the plan with the largest data headline without checking how much data you will actually use. Between your hotel Wi-Fi and basic navigation, maps, messaging, and ride-hailing usually only eat through a few gigabytes. It’s the data-heavy tasks—like hotspot sharing for work, long video calls home, or daily high-res uploads—that should push you toward an unlimited plan. You can compare options for other stops in our Asia SIM and eSIM hub .

Current price comparison

Prices below were meticulously checked on 20 August 2026. Keep in mind that promotions and exchange rates fluctuate constantly, so use the links to confirm the final live checkout price before you pay.

A quick word of warning: the phrase “unlimited” needs a very close look. Many plans offer unlimited total access but will drastically slow your speed after a daily high-speed allowance—frustrating when you’re trying to load a map in a hurry. Airalo is usually good at publishing these details at checkout, while dtac explicitly describes a separate max-speed allowance. You can save a screenshot of the exact terms when you buy.

Compare Airalo, Yesim, Saily, Drimsim and GigSky

Airalo offers a logical ladder that fits the rhythm of a typical holiday: starting with 1 GB for seven days, then stepping up to 2–20 GB options with longer validity. Its fixed-data 10 GB plan, priced at US$11 during this review, is usually the sweet spot for a one- or two-week trip where you’re checking maps and messaging home without constantly hunting for Wi-Fi. The standard Maew product connects via True and another supported network, and crucially, it only begins its validity countdown once it first finds a signal in Thailand. Airalo also lists heavier unlimited plans and a specialized dtac-based package that includes 50 GB of data, 100 minutes of talk time, and that all-important Thai phone number. However, Read the fine print: that calls-inclusive package follows its own activation rules, so don’t assume every Airalo eSIM behaves the same way.

Yesim catches the eye with 1 GB for US$3.12, 5 GB for US$8.40, and 10 GB for US$13.20, all generously valid for 30 days. This is a pure data play—there’s no local number here—and the validity clock starts ticking the moment you hit a compatible Thai network. You have a massive 180-day window to activate it after purchase, which is great for planners. One realistic caveat: Yesim notes that hotspot availability depends on the underlying operator. While it’s a brilliant, long-validity backup to keep in your digital pocket, do not rely on it as the primary connection for tethering a laptop until you’ve confirmed the specific checkout terms.

Saily keeps things competitive with tiered pricing ranging from US$2.99 for a 1 GB/7-day teaser to US$10.99 for a 10 GB workhorse. Their 15-day unlimited plan (US$38.99 at this check) is a powerhouse, offering 5 GB of unrestricted-speed data every single day before settling into a still-usable 1 Mbps. A useful detail is that the standard plans support hotspot sharing and activate when the phone connects after arrival, provided the roaming settings are ready. The catch—and it’s an important one—is the 30-day activation window; if your trip is delayed, the plan will start counting down regardless, so don’t buy this one too far in advance.

Drimsim isn’t about bundles; it’s a pay-as-you-go safety net. At roughly €0.01 per MB (about €10 per GB) with no monthly fees or expiry dates, it’s a relief for those who cross borders frequently and just need enough data to book a Grab or check a gate number. However, if you’re staying in Thailand for more than a few days, the costs will quickly eclipse the value of a fixed 5–10 GB bundle.

GigSky offers Thailand plans starting from US$3.99 and, uniquely, a 100 MB free trial that lets you test the connection before committing. It’s worth a look if you’re already in their ecosystem, but You should look past the “starting price” and verify the actual high-speed allowance and fair-use rules in the app. Treat it as a secondary option and compare the high-speed allowance and fair-use rules in the app before paying.

In the end, choose based on validity and the specific features you need, rather than stressing over a dollar or two. If your trip involves calling local hotels or receiving SMS codes for Thai apps, a data-only eSIM will leave you frustrated; in that case, stick to a local tourist plan or an eSIM that explicitly includes voice service.

When a local tourist SIM is better

Consider buying directly from AIS, True, or dtac when you want the peace of mind of having a professional register and test the line for you. This is essential if you need local voice calls or if your phone is a slightly older model that doesn’t support eSIM. Don’t forget to bring your physical passport—Thai law requires subscriber registration, and a digital copy won’t cut it at the counter.

AIS currently offers a wide range of tourist packages spanning from five to 60 days. Their shorter plans are particularly attractive, often bundling unlimited max-speed data, free calls within the AIS network, and a local number into a single, affordable price. When looking at dtac, A useful detail is that their official tourist page clearly distinguishes the high-speed allowance from the overall service period; it’s a much more honest and useful metric than the vague word “unlimited” on its own.

Airport counters are undeniably convenient, especially when you’ve just stepped off a long flight into the humid Bangkok air, but You should compare the specific package being offered rather than just accepting the first “Tourist SIM” sign you see in arrivals. If the queues are long and the heat is getting to you, use the airport’s free Wi-Fi to book your ride, head to the city, and visit an operator shop in a shopping mall where the air-con is stronger and the staff are often less rushed. The Suvarnabhumi Airport to Bangkok guide will help you navigate that first transfer without needing to burn through your mobile data immediately.

Which option fits your trip?

Three to seven days

A modest 1–5 GB travel eSIM is usually more than enough for a focused city break. However, choose a local tourist SIM if you expect to call local restaurants or want help with setup. No matter which you choose, download your offline maps before you even board the plane—it’s a simple step that saves a lot of stress when you’re standing on a busy street corner in the midday sun.

Eight to fifteen days

Take a moment to compare Airalo’s 10 GB fixed plan against the AIS and dtac packages that align with your travel dates. If your trip involves coordinating with local drivers, making restaurant reservations, or staying in touch with new local friends, having a Thai number becomes significantly more important. On the other hand, if every single booking and ticket is already tucked safely inside your apps, a data-only eSIM is the cleaner, simpler choice.

Islands, the north or remote roads

It’s a hard truth that no reseller can guarantee perfect coverage in every corner of the country. Check which Thai network your chosen eSIM actually uses, then cross-referencing that with the operator’s coverage map for the specific stops on your Thailand itinerary . A plan that feels lightning-fast in the heart of Bangkok might struggle when you’re exploring a remote mountain road in the north or relaxing on a secluded island beach.

Singapore plus Thailand

A regional eSIM is a great way to cut down on profile switching, but compare its price and validity against buying two separate destination plans. At this check, Saily’s Asia and Oceania plan covered both Thailand and Singapore: 1 GB for 7 days was US$4.99, 3 GB for 30 days was US$12.49, and 25 GB for 60 days was US$48.99. While it’s definitely simpler than juggling profiles, you might find that two local country plans are actually cheaper if your stay in each destination is relatively short. The Singapore SIM and eSIM guide can help you weigh the local alternatives for the other half of your journey.

Setup without surprise roaming

1. Confirm the phone is carrier-unlocked and supports eSIM.
2. Install the eSIM on reliable Wi-Fi before departure, but follow the provider’s instruction about when to switch it on.
3. Save the QR code, order number and manual APN instructions offline.
4. Set the Thailand line as the mobile-data line.
5. Disable mobile-data switching and data roaming on the home line.
6. Enable roaming only on a travel eSIM when its instructions require it.
7. Test maps and messaging before leaving the airport.

Do not delete a failed eSIM immediately. Many of these QR codes are strictly single-use, and deleting them often burns your bridge to a refund or a fix. Instead, take a breath, restart your phone, double-check that you’ve selected the correct data line and network settings, and then reach out to the provider’s support team over the airport Wi-Fi.

The practical recommendation

For the majority of travelers with unlocked eSIM-compatible phones, compare the 5–10 GB offerings from Airalo, Yesim, and Saily. At the time of this check, Saily and Airalo offered the most competitive pricing, while Yesim stood out for its generous 30-day validity and long activation window. The practical choice is to only pull the trigger after you’ve double-checked the specific hotspot and start-date rules at checkout. If your trip requires a local Thai number, a hands-on professional setup, or if you’re using an older device, your best bet is a tourist plan from AIS, True, or dtac—or the Airalo dtac package, provided its specific installation and network terms match your itinerary.

Once your connectivity is sorted, you can focus on the rest of your adventure: planning your money and travel costs , finding the perfect neighborhood in where to stay in Bangkok , and ensuring your travel insurance is robust and independent from any mobile-service marketing gimmicks.