Thailand SIM Guide 2026

From Bangkok temples to island Wi-Fi-free beaches, stay online.

An Australian-friendly guide to staying connected in Thailand. The three Thai networks compared, where to buy, and how to skip the SIM counter entirely with an eSIM bought before you fly.

$15AUD

From, for a week of data

15GB

Typical tourist plan

5Gcities

Across Bangkok, Phuket, more

The short answer

Thailand is one of the easiest and cheapest countries to get connected in. A typical tourist SIM costs around $15 to $25 AUD for 15 to 30 GB over a week or two, sold at every airport and 7-Eleven. If you want to skip the SIM counter entirely, a travel eSIM installed before flying is even easier. Three Thai networks compete on coverage, AIS is best for islands and rural travel, TrueMove H is strong in cities, DTAC is solid for Bangkok.

Your two main options

eSIM before you fly, or local SIM on arrival?

Thailand makes both paths easy. The airport SIM counters genuinely work (English-speaking staff, quick setup), but a travel eSIM installed before flying skips even that small step. Pick by preference, not necessity.

Most convenient

Travel eSIM before you fly

Install at home over Wi-Fi, activate when you land at Suvarnabhumi, Don Mueang, Phuket or wherever you arrive. Connected the moment you walk out of customs.

Online from arrival, no airport counter visit
Keep your AU number on your existing SIM
No passport scan needed
Same provider across multiple trips
Needs an eSIM-compatible phone
Slightly higher cost per GB than local

Best for: short trips, anyone with an iPhone XR+/Pixel 3+/Samsung S20+, repeat visitors, those who land late and want to skip queues.

Cheapest per GB

Local Thai tourist SIM

Pick up at the airport AIS, True or DTAC counter in arrivals, or at any 7-Eleven in Thailand (over 13,000 stores nationwide). Cheapest data, more steps.

Around $15 to $25 AUD for 15 to 30 GB
Choose your preferred Thai network
Get a Thai phone number for local apps
Works on any phone with a SIM slot
Need to show passport at registration
Your AU SIM offline unless dual-SIM

Best for: longer trips of 2+ weeks, budget-focused travellers, anyone wanting a Thai number for LINE, Grab, or food delivery apps.

Networks compared

The three Thai mobile networks for tourists

Thailand has three main networks. TrueMove H and DTAC merged in 2023 under True Corporation but still operate as separate brands with separate networks. AIS remains independent and runs the largest single network in the country.

Network

What to know

Best for

AIS Largest single network

Best overall coverage. Widest nationwide network, strongest signal on islands (Koh Samui, Koh Lanta, Koh Phi Phi), in remote north (Pai, Chiang Rai), and along less-travelled routes. The default pick for itineraries beyond Bangkok.

Islands and rural

TrueMove H Part of True Corporation

Strong urban speeds. Fast 5G in Bangkok, Phuket, Chiang Mai and other major cities. Good coverage along main travel corridors. Now under True Corporation umbrella after the DTAC merger but still operates as TrueMove H tourist SIM brand.

City focus

DTAC Part of True Corporation

Solid coverage in Bangkok, Pattaya and main tourist hubs. Coverage is slightly weaker than AIS in remote areas and on outer islands. Often the budget-friendliest tourist plans at the airport counters.

City budget

Network information verified May 2026. Travel eSIMs typically run on TrueMove H or DTAC networks in Thailand. Check the plan details if you want AIS specifically.

Where Australians travel

Three popular Thailand itineraries, and what to choose.

ITINERARY 01

Bangkok and around

Bangkok, Pattaya, Hua Hin, Ayutthaya. Dense urban areas, BTS Skytrain, Grab rides, food court navigation. Any Thai network works fine.

Suggested: TrueMove H or DTAC

ITINERARY 02

Southern islands

Phuket, Krabi, Koh Phi Phi, Koh Lanta, Koh Samui, Koh Tao. Island hopping, longtail boats, remote beach stretches.

Suggested: AIS network

ITINERARY 03

Northern Thailand

Chiang Mai, Chiang Rai, Pai, the Golden Triangle. Mountains, hill tribe villages, longer drives between towns.

Suggested: AIS network

If you go local

Where to buy a SIM card in Thailand

Thailand makes this easy. Four common channels, all with English-speaking staff in tourist areas. Bring your passport, Thai law requires SIM registration with a valid passport since 2015.

Major airports

Easiest on arrival

Suvarnabhumi, Don Mueang, Phuket and Koh Samui airports have AIS, True and DTAC counters in arrivals halls. English-speaking staff, full setup and activation in a few minutes. Walk out connected.

7-Eleven stores

Most convenient

Over 13,000 7-Elevens across Thailand. They sell AIS and TrueMove tourist SIMs at standard prices (no airport markup). Pop in any time of day or night. Ask for a "tourist SIM" and staff will know what you mean.

Carrier shops in malls

Full English support

AIS, True and DTAC branded shops in major shopping malls (Terminal 21 in Bangkok, Central Festival in Pattaya, MBK, Siam Paragon). Best for choosing custom plans or longer-stay packages with full English-speaking staff.

Pre-order online

Skip the in-person step

Order a Thailand travel eSIM online from Australia, install before flying, activate when you land. No passport scan, no counter visit, no Thai number but full mobile data from arrival.

If you prefer eSIM

An Australian-friendly eSIM option

If you want to install an eSIM before flying and skip every Thai SIM-counter step, one practical AU-accessible option is Lyca Mobile's global travel eSIM range. Lyca's strength is international calling and global coverage, so Thailand is well-covered alongside their other Southeast Asian destinations. Same Lyca app handles your AU plan and your Thailand data.

An AU-accessible eSIM path

Lyca Mobile global travel eSIM

Buy a travel eSIM through the Lyca app, install it before you fly, activate when you land in Thailand. For Thai-specific tourist SIMs, a local AIS or TrueMove SIM may be cheaper per gigabyte, but a global eSIM gives you one provider across all your travel destinations.

Explore Lyca plans

Before you fly

Six practical Thailand SIM tips

Get AIS if you are visiting islands or going north. AIS has the widest rural and island coverage in Thailand. If your itinerary includes Koh Samui, Koh Lanta, Pai or anywhere beyond the main cities, AIS is the safer pick. For Bangkok-only trips, any network works fine.
Carry your passport for SIM registration. Thai law requires passport ID for all SIM cards (this has been the rule since 2015). The registration is quick, 5 minutes at most, but you cannot buy a SIM without a passport on hand. Travel eSIMs bought online skip this step entirely.
Get a Thai number if you will use local apps. LINE, Grab (rideshare and food delivery), and many Thai restaurant booking apps work best with a Thai phone number. If you will rely on these heavily, a local SIM beats a data-only eSIM for app-registration reasons.
7-Eleven is your friend. If you missed the airport SIM counter or want to switch carriers mid-trip, every 7-Eleven sells AIS and TrueMove tourist SIMs at standard prices. Open 24 hours in most locations. Same prices as carrier shops, no markup.
Download offline Google Maps for the islands. Even with the best Thai network, coverage on small islands and during longtail boat transfers between islands can drop. Download offline maps of your destination areas before flying, saves data and gives you backup navigation.
AU roaming day-passes rarely beat local prices. Thai tourist SIMs are so cheap that AU carrier roaming almost never wins on price for trips longer than 2 to 3 days. For longer stays the math is even more lopsided. Use AU roaming only for very short trips or business stopovers.

FAQ

Common questions on Thailand SIMs and eSIMs

Do I need a SIM card for Thailand?

For most Australian visitors, yes. Thailand has free Wi-Fi in many hotels, cafes and malls, but you will rely on mobile data heavily for Google Maps, Grab (rideshare), restaurant booking and translation apps. A travel SIM or eSIM is genuinely affordable in Thailand, typically $15 to $25 AUD for a week of generous data, so the cost-benefit is strongly in favour of getting connected from day one.

Which is the best Thai network for tourists?

AIS has the widest nationwide coverage and is the safest pick if you are visiting islands or remote areas (Koh Samui, Koh Lanta, the north around Chiang Mai or Pai). TrueMove H (now part of True Corporation after merging with DTAC) has fast speeds in cities and is strong across Bangkok, Phuket and main tourist hubs. DTAC still operates as a separate brand under True Corporation and offers good city coverage with budget-friendly tourist plans. For Bangkok-only or main-island trips, any of the three works fine.

How much data do I need for a week in Thailand?

For most Australian visitors, 10 to 15 GB covers a week comfortably. You will use mobile data daily for Google Maps, Grab, food delivery apps, restaurant research, social posting and the occasional video call home. Tourist SIM plans in Thailand are usually generous, often 15 to 30 GB for 8 to 15 days, so you rarely have to ration. For 2-week trips that mix Bangkok with the islands, 20 to 30 GB is plenty.

Should I buy a SIM in Thailand or get a travel eSIM before flying?

Thailand is one of the easier countries to buy a SIM in. The airports have official AIS, True and DTAC counters in the arrivals hall, staffed by English-speaking representatives who will install and activate the SIM for you in a few minutes. A travel eSIM bought before flying skips even that step. For most Australian visitors, either path works well. An eSIM is simplest, a local SIM is cheapest per gigabyte.

Where do I buy a SIM card in Thailand?

Four common options. Major airports (Suvarnabhumi, Don Mueang, Phuket, Koh Samui) have AIS, True and DTAC counters in arrivals halls. 7-Eleven stores are everywhere in Thailand (over 13,000 nationwide) and sell AIS and TrueMove tourist SIMs. Carrier shops in shopping malls like Terminal 21 or Central Festival also sell SIMs with full English support. Lastly, you can order a travel eSIM online before flying.

Do I need my passport to buy a SIM card in Thailand?

Yes. Thai law since 2015 requires all SIM cards to be registered with a valid passport. This applies whether you buy at the airport, 7-Eleven, or a carrier shop. The registration usually takes 5 minutes, the staff will scan your passport and link the SIM to your details. Travel eSIMs bought from international providers do not require this step, which is one of their convenience advantages.

Will I get 5G in Thailand?

Yes in cities and most tourist areas. Bangkok, Chiang Mai, Phuket, Pattaya, Hua Hin and Krabi all have strong 5G coverage. Major travel routes between cities also have 5G or fast 4G. Remote islands and rural areas often fall back to 4G LTE, which is still fast enough for everything except heavy 4K streaming. All three Thai carriers (AIS, TrueMove H, DTAC) have rolled out 5G across the main tourist zones.

Will my Australian SIM work in Thailand?

Yes with roaming enabled, but at AU roaming rates. Most Australian carriers offer roaming day-passes for Thailand at around $5 to $10 per day. Since local Thai tourist SIMs are so cheap (often under $15 AUD for a week), local SIMs or eSIMs almost always work out cheaper than roaming for any trip longer than 2 to 3 days. Check your carrier's roaming page before assuming roaming is active.

Heading to Thailand? Sort your SIM before you fly.

Install a Lyca travel eSIM at home, land in Bangkok or Phuket already connected, and skip the SIM counter at arrivals. One Lyca app for your AU plan and your Thailand data, one bill across both.

Explore Lyca travel plans