Where 5G ends and LTE takes over in Thailand
Thailand has 3 mobile networks: AIS (5G), DTAC (5G), True Move (4G). All 5 providers we rank route through these carriers. Our editorial pick routes through AIS, which delivers the strongest urban and rural coverage combination across AIS, DTAC, and True Move based on coverage analysis. Airalo's catalogue starts at $0.29/GB with 5G access. Runners-up HelloRoam and Holafly connect via DTAC, scoring 4.9/5 and 4.3/5 on coverage.
Provider routing covers 3 mobile networks in Thailand: AIS, True Move H, and DTAC. AIS connects through the strongest combination of urban coverage and rural reach among those options. AIS sits at the top of the published carrier list for travel eSIM traffic in Thailand. 5G is live in major cities: 5G available in Bangkok, Chiang Mai, Pattaya, Phuket; rural areas 4G only.
Coverage notes for Thailand, from the carriers' published maps: AIS publishes 4G across the islands, Koh Samui and Koh Phangan included. True Move H's map thins out around remote Koh Lipe. passport required for local sim purchase; biometric selfie verification at carrier stores. Thailand welcomes 35.5M (2024) tourists annually. peak travel runs in Nov-Feb and Jul-Aug.
A travel eSIM in Thailand attaches to AIS on 5G. All 5 ranked providers ride that same host network rather than one of their own, so the network under a HelloRoam plan and the network under an Airalo plan is the same equipment. The published list carries 3 operators for Thailand, so a provider with more than one partner has somewhere to fall back to. This site publishes no throughput figure, because it runs no speed test.
5G status in Thailand: 5G available in Bangkok, Chiang Mai, Pattaya, Phuket; rural areas 4G only. Your eSIM automatically connects to the fastest available band when 5G is in range.
Installing a Thailand eSIM where local SIMs need ID
Purchase your Thailand eSIM from the provider app or website. Scan the QR code over WiFi at home. The eSIM installs in under 2 minutes. Label the new line "Thailand Data" to keep it separate from your home SIM.
When you land in Thailand, enable data roaming on the eSIM line. Your phone connects to AIS's 5G network within 30 seconds. Thailand requires SIM registration. Travel eSIM providers handle this automatically during activation.
Download your Thailand eSIM while you still have WiFi at home. Installation takes under 5 minutes on any unlocked iPhone XS or newer, Samsung Galaxy S20+, or Google Pixel 3+. We recommend completing setup at least 24 hours before your 9-day trip. Thailand has 3 carrier networks, and plans start at $3.49 for 1GB.
Your eSIM connects to AIS's 5G network in Thailand. The country operates 3 networks: AIS, True Move H, and DTAC. AIS provides the strongest combination of urban reach and tourist-corridor coverage based on network data.
Open your provider's app, scan the QR code, and select Thailand as your data plan destination. Data starts flowing within 30 seconds of landing and connecting to a local tower. The catalogue lists 8 plans for Thailand, starting at $0.29/GB on AIS's infrastructure.
Thailand requires SIM registration for mobile connections. Passport required for local SIM purchase; biometric selfie verification at carrier stores. Travel eSIM providers typically handle this step for you during activation.
5G is live in major cities: 5G available in Bangkok, Chiang Mai, Pattaya, Phuket; rural areas 4G only in Thailand. Outside urban centers, your eSIM falls back to 5G on AIS. From the carriers' published coverage maps for Thailand: AIS publishes 4G across the islands, Koh Samui and Koh Phangan included. True Move H's map thins out around remote Koh Lipe.
For a full walkthrough with screenshots, see our eSIM buying guide.
How much data you need in Thailand, where gigabytes are cheap
The published price ladder for Thailand: 1GB at $3.49 ($3.49/GB), 3GB at $4.99 ($1.66/GB), 5GB at $6.99 ($1.40/GB), 10GB at $9.97 ($1/GB), 20GB at $15.99 ($0.80/GB). Best value sits at 20GB for $15.99, at $0.80 per gigabyte. Budget entry starts at $3.49 for 1GB. Premium unlimited daily data costs $3.49/day with 2GB at full speed before throttling. Longer commitments reduce the daily rate: the 30-day plan drops to $2.86/day (18% off). Among the 5 providers we ranked, HelloRoam scores highest on pricing (4.8/5). Holafly follows at 4.7/5. Ladder rates run from $0.29 to about $3.49 depending on plan size. Pricing context from our research: Thailand consistently offers the lowest eSIM prices in Southeast Asia, driven by fierce three-way carrier competition..
Before purchasing an eSIM for Thailand, our editors flagged these details.
Coverage notes for Thailand, from the carriers' published maps: AIS publishes 4G across the islands, Koh Samui and Koh Phangan included. True Move H's map thins out around remote Koh Lipe.
Our scoring notes for Thailand: AIS-routed providers delivered the most consistent 5G speeds and widest geographic coverage of any Thai carrier network..
SIM registration requirement: Passport required for local SIM purchase; biometric selfie verification at carrier stores.
WiFi availability in Thailand: Free WiFi in most cafes, co-working spaces, and 7-Elevens; Thailand ranks among the top global WiFi markets.
True and DTAC merged in 2023 and now offer identical tourist plans under both brands.
Free WiFi on Bangkok BTS Skytrain and MRT stations.
Light travelers (maps, messaging, email) use 500MB-1GB per day. Moderate users (social media, photo uploads, ride-hailing) need 1-2GB daily. Heavy users (video calls, streaming, remote work) consume 2-4GB per day.
For a 9-day trip to Thailand: light users need roughly 7GB, moderate users need 14GB. The 20GB plan at $15.99 on AIS covers the moderate scenario.
WiFi in Thailand: Free WiFi in most cafes, co-working spaces, and 7-Elevens; Thailand ranks among the top global WiFi markets. Available WiFi reduces your eSIM data consumption, but should not be relied on for critical tasks.
Thailand eSIM pricing on AIS: 1GB: $3.49 ($3.49/GB), 3GB: $4.99 ($1.66/GB), 5GB: $6.99 ($1.40/GB), 10GB: $9.97 ($1/GB), 20GB: $15.99 ($0.80/GB). Larger plans reduce the per-GB cost. All prices are one-time with no auto-renewal.
Unlimited option: $3.49/day with no data cap (2GB at full speed). Multi-day discounts available: the 30-day plan costs $2.86/day.
Airport SIM comparison: kiosk SIMs in Thailand cost $8-23 for unlimited data / 7-15 days with 5-10 min; counters open 24 hours wait time. eSIM prices start at $0.29/GB with instant activation.
Explore all destinations in Asia or read our full buying guide to understand which provider wins for your travel style. See also: the rubric each provider is scored against.
Thailand: eSIM or local SIM card?
Buying a SIM at Suvarnabhumi (BKK) / Don Mueang (DMK) and installing an eSIM before departure compare on published price alone. AIS, True Move H, and DTAC sell prepaid SIMs at the arrivals terminal. Airport SIM cards typically cost $8-23 for unlimited data / 7-15 days. Vendors quote 5-10 min; counters open 24 hours for purchase and activation at the counter. An eSIM activates in under 2 minutes from your phone, with zero wait and no counter visit.
Local prepaid SIMs in Thailand run $5-15 for 10-30GB / 7-30 days. The cheapest gigabyte in the published catalogue costs $0.29, which undercuts most prepaid counters. The eSIM also saves you from ID registration lines and store visits that eat into your first day.
Seasonal pricing note from our research: Airport SIMs cost 20-30% more than 7-Eleven or carrier stores in the city. eSIM prices from international providers stay fixed regardless of local market shifts.
Our comparison note: Airport SIM counters offer instant activation with passport scan, faster than eSIM QR code setup for less tech-savvy travelers..
Which provider wins Thailand: per-gigabyte plans stay ahead
For budget travelers the pricing dimension is the one to read: HelloRoam publishes an entry rate of $3.50/GB and scores 4.8/5 there, ahead of Holafly at 4.7/5. Plans in Thailand attach to AIS on 5G, DTAC on 5G, and True Move on 4G, with True Move H also on the published carrier list. Airalo's Thailand catalogue undercuts that: the ladder steps from $3.49 for 1GB to $15.99 for 20GB, and the 20GB rung is its cheapest gigabyte at $0.80. Holafly sells unlimited at $2.99/day, so a trip past 6 days costs more on the day rate than the 20GB rung costs outright at $15.99. One local detail the rubric does not score: Grab requires a phone number for registration; works with international numbers but local number recommended.
HelloRoam earns the Thailand pick at 9.5/10, with the top mark on network tier, pricing and support. Its published entry rate is $3.50/GB, which the 20GB rung on this ladder beats at $0.80/GB.
Airalo follows at 9.3/10, 0.2 points back, and the ladder this page quotes is Airalo's own Thailand catalogue, which bottoms out at $0.29/GB.
Worth knowing before you buy for Thailand: 7-Eleven stores sell prepaid SIM top-ups and are open 24/7 across the country.
eSIM provider comparison for Thailand (June 2026)| Provider | Score | $/GB | Best For | Action |
|---|
| HelloRoam | 9.5/10 | from $3.50/GB | Editors Choice | Get deal → |
|---|
| Airalo | 9.3/10 | $4.50/GB | Widest Coverage | Get deal → |
|---|
| Holafly | 8.9/10 | $2.99/day | Best Unlimited | Get deal → |
|---|
| Saily | 8.4/10 | $3.99/GB | Best Privacy | Get deal → |
|---|
| Nomad | 8/10 | $3.00/GB | Best Budget | Get deal → |
|---|
See our budget eSIM guide for the cheapest options, or our unlimited eSIM guide if data caps are a concern.
Provider assessments for Thailand
HelloRoam
HelloRoam scores 9.5/10 on an entry rate of $3.50/GB, and the best rung on the Thailand ladder is 20GB at $0.80/GB, below that. Every provider here rides the same host networks in Thailand: AIS on 5G, DTAC on 5G, and True Move on 4G, plus True Move H.
Airalo
Airalo scores 9.3/10 on an entry rate of $4.50/GB, and the ladder on this page is its own Thailand catalogue: $3.49 for 1GB up to $15.99 for 20GB, bottoming out at $0.29/GB.
Holafly
Holafly scores 8.9/10 and sells unlimited only, at $2.99/day, so the comparison is a break-even: under 6 days that costs less than the 20GB rung's $15.99, and past it costs more.
Saily
Saily scores 8.4/10 on an entry rate of $3.99/GB, and every rung on the Thailand ladder costs less per gigabyte than that. VPN note for Thailand: VPNs legal and widely used; some gambling and lese-majeste content blocked at ISP level.
Nomad
Nomad scores 8.0/10 on an entry rate of $3.00/GB, and Airalo's catalogue floor for Thailand is $0.29/GB, under that.
Real-world usage in Thailand
Navigation and maps in Thailand
Google Maps and Waze use 5-10MB per hour of active navigation. On AIS's 5G network, maps load in under 2 seconds. The 20GB plan at $15.99 covers 2-3 weeks of daily navigation.
Messaging and video calls
WhatsApp, FaceTime, and Zoom run smoothly on 5G in Thailand. A 30-minute video call uses roughly 270MB. WiFi context: Free WiFi in most cafes, co-working spaces, and 7-Elevens; Thailand ranks among the top global WiFi markets.
Streaming and content
HD video streaming uses about 1.5GB per hour on AIS's network. Holafly's unlimited plan from $2.99/day handles heavy streaming without data caps.
Typical 9-day trip
A moderate traveler uses about 1.5GB per day across maps, messaging, and photo uploads. For 9 days in Thailand, plan for 13.5GB total. The 20GB plan at $15.99 is the best match for this usage level.
Value analysis for Thailand
The 20GB plan delivers the strongest value at $0.80/GB for Thailand. Budget travelers can start with 1GB at $3.49. Both tiers connect through AIS's 5G network with identical speed access.
Unlimited data costs $3.49/day for Thailand. For trips under 5 days, a fixed plan wins on cost. Longer stays or heavy data usage tips the balance toward unlimited.
HelloRoam leads our Thailand value ranking with a 9.5/10 editorial score. 5 providers compete for Thailand. The published ladder starts at $0.29/GB.
How the rubric scored eSIMs for Thailand
All 5 providers are scored on the same five weighted dimensions, every input a figure the provider publishes: coverage 25%, pricing 25%, network tier 20%, app 15%, support 15%.
What the rubric read for Thailand: a carrier list of 4 operators, with AIS on 5G, DTAC on 5G, and True Move on 4G; a 5-rung published ladder from $3.49 for 1GB to $15.99 for 20GB; a lowest catalogue rate of $0.29/GB, which is Airalo's; an unlimited daily option in the same Airalo catalogue.
Read the full scoring rubric.
Thailand in the Asia eSIM landscape
Thailand ranks above average for eSIM infrastructure in Asia. 3 networks accept eSIM roaming, with AIS providing the primary routing for all 5 providers.
Per-GB pricing in Thailand starts at $0.29, which is competitive for the Asia region. 8 plans are available across providers, including unlimited daily data at $3.49/day.
5G availability gives Thailand an edge over neighboring destinations that remain on 4G LTE only. 5G available in Bangkok, Chiang Mai, Pattaya, Phuket; rural areas 4G only.
Thailand eSIM: frequently asked questions
Why does HelloRoam earn your Thailand eSIM pick?
HelloRoam scores 9.5/10 on our published rubric for Thailand, the highest composite of the five providers ranked here. Plans for Thailand route through AIS on 5G. HelloRoam refunds an unactivated eSIM for 180 days. Its dimension scores are coverage 4.9/5, network tier 4.7/5, app 4.7/5, pricing 4.8/5 and support 4.5/5. Airalo's published ladder for Thailand starts at $0.80/GB, with its 20GB plan at $15.99.
How do you score eSIM providers in Thailand?
The BesteSIM rubric scores HelloRoam, Airalo, Holafly, Saily and Nomad on five published inputs. No figure here comes from a speed test. Coverage carries 25% and reads the operator list for Thailand, which names 3 carrier networks led by AIS. Price carries 25%, normalised to cost per gigabyte across every plan size. Network tier carries 20%, app features 15%, and support access 15%, the last read off published support languages: HelloRoam answers in 63, Airalo in 12, Saily in 1. 5G available in Bangkok, Chiang Mai, Pattaya, Phuket; rural areas 4G only. Every input is a published figure a reader can check.
What changed in the 2026 Thailand eSIM rankings?
Pricing update for 2026: the 1GB plan is now $3.49. Routing: all five providers now route through AIS as the primary partner in Thailand, consolidating from multiple carrier agreements. 5G coverage note: 5G available in Bangkok, Chiang Mai, Pattaya, Phuket; rural areas 4G only. We rank 8 plans for Thailand, with the 20GB plan at $0.80/GB.
Which phones support eSIM for Thailand?
Your eSIM connects to AIS's 5G network in Thailand. 5G is confirmed on iPhone XS+, Samsung Galaxy S20+, and Google Pixel 3+. Your device must be carrier-unlocked. AIS publishes 5G service across Thailand. Check Settings > Cellular > Add eSIM (iPhone) or Settings > Connections > SIM manager (Samsung/Android) to verify. Most 2022+ Android flagships also work on AIS's 5G signal in Thailand.
Can I make phone calls with a Thailand travel eSIM?
Travel eSIMs provide data only on AIS's 5G network. No local phone number is assigned. Use WhatsApp, FaceTime, or Zoom over your Thailand data connection. Keep your home SIM active to receive calls on your regular number. All five providers ranked here (HelloRoam, Airalo, Holafly, Saily, Nomad) sell data-only plans for Thailand.
What 5G coverage can I expect from a Thailand eSIM?
All five providers route Thailand eSIMs through AIS or DTAC, the leading carrier in the Asia region. 5G available in Bangkok, Chiang Mai, Pattaya, Phuket; rural areas 4G only. AIS publishes 5G service across the main cities and tourist corridors, and every provider on this page rides that same network rather than one of its own.
Is eSIM support mature in Thailand compared to the rest of Asia?
Thailand has 3 network operators accepting eSIM roaming: AIS, DTAC, True Move. That puts it in the top tier for Asia eSIM maturity. All five ranked providers sell data-only plans on 5G here. Provider scores for Thailand are on each provider's review page, with the weighting shown in full on the rubric page.
Can I tether or hotspot with a Thailand eSIM?
It depends on the provider. Airalo, Saily, and Nomad allow tethering on their Thailand plans with no extra fee. You can share your 5G connection on AIS with laptops and tablets. Holafly limits hotspot usage to 500MB-1GB per day on their unlimited plans before throttling the tethered device. Airalo's hotspot delivers 5G speeds to connected laptops and tablets without throttling.
How much does an airport SIM cost vs eSIM in Thailand?
Airport SIM cards in Thailand typically cost $8-23 for unlimited data / 7-15 days from AIS, True Move H, DTAC. You will wait 5-10 min; counters open 24 hours in line, plus time for ID registration. An eSIM starts at $0.29/GB with instant AIS activation from your phone. Compare the two on published price alone: $8-23 for unlimited data / 7-15 days at the kiosk against $0.29/GB from the phone, with no counter queue and no passport scan.
What is the best-scoring eSIM plan for Thailand?
The 20GB plan at $15.99 ($0.80/GB) takes the highest pricing score for Thailand, because it holds the lowest published cost per gigabyte in the catalogue. It routes through AIS on 5G, the same carrier every one of the five providers uses here. Full plan range: 1GB at $3.49, 3GB at $4.99, 5GB at $6.99, 10GB at $9.97, 20GB at $15.99. The 20GB tier suits trips of 5 days or more.
How much does roaming cost in Thailand vs an eSIM?
Home carrier roaming in Thailand typically costs $5-15/day or $10-20/GB. An eSIM starts at $0.29/GB on AIS's 5G network. The 20GB plan at $15.99 covers most trips for a fraction of roaming fees.
Can I use multiple eSIMs in Thailand?
Most modern phones support 8-10 eSIM profiles simultaneously. Only one data eSIM can be active at a time in Thailand. You can keep your home SIM active for calls while using an eSIM on AIS for data. Switch between profiles in Settings without removing any.
Travel tips for Thailand, where public WiFi is easy to find
Data usage runs high in Thailand due to ride-hailing apps, translation tools, and maps. Travelers use about 1.8GB per day on average. A typical 9-day visit needs roughly 16.2GB of mobile data. WiFi note: Free WiFi in most cafes, co-working spaces, and 7-Elevens; Thailand ranks among the top global WiFi markets.
You will likely arrive at Suvarnabhumi (BKK) / Don Mueang (DMK). the local time zone is ICT (UTC+7). wall outlets use Type A/B/C/O sockets, so pack the right adapter.
The emergency number in Thailand is 191/1669. Store it before you leave home. the local currency is THB (฿). Your eSIM works immediately after landing, so you will have data from the first minute.
Travel timing: Cool dry season (November-February) is peak; European summer holidays bring second wave July-August. eSIM prices from international providers stay fixed regardless of peak or off-peak travel periods.
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Best
Thailand · 5 providers compared
