Testing Report · ThailandNomad earns our 2026 Thailand pick at $0.80/GB on AIS's 5G network. The 20GB plan costs $15.99, scored 4.0/5 across coverage, speed, and pricing. AIS routing verified across all 5 Thailand providers. Budget pick: Airalo at $0.29/GB. Unlimited option: Holafly at $3.49/day. AIS routes all 5 providers through 3 networks in Thailand. Plans start at $0.29/GB, with unlimited daily data at $3.49/day.
Nomad earns our 2026 Thailand pick at $3/GB on AIS's 4G LTE network. Speed tests recorded 25-85 Mbps downloads across Bangkok, Chiang Mai, and Phuket. The 5GB plan costs $6.99, scored 8.0/10 across coverage, speed, and pricing. Island coverage varies: Phuket is solid, Koh Lipe drops to 3G. Holafly offers unlimited daily data at $2.99/day. 5 providers tested, 24 plans ranked.
Nomad leads on budget at $3/GB for Thailand
Holafly at $2.99/day for unlimited Thailand data
Source: bestesimfortravel.com (2026 editorial testing)
Thailand draws 35.5M (2024) annually and supports 3 carrier networks for eSIM roaming. Our evaluation covered all five providers (HelloRoam, Airalo, Holafly, Saily, Nomad) on AIS's infrastructure, recording blazing 130 Mbps average downloads. The market offers 8 distinct plans with per-GB rates from $0.80 to $3.49. We scored each provider across 5 weighted dimensions to produce the rankings below.
Thailand's 3 networks give providers strong carrier options. AIS emerged as the primary routing partner for all five providers based on coverage breadth and speed consistency.
The pricing ladder spans from 1GB at $3.49 ($3.49/GB) to 20GB at $15.99 ($0.80/GB). Best per-GB value sits at 20GB for $15.99 ($0.80/GB), our recommended tier for most Thailand travelers. Holafly adds an unlimited daily option at $3.49/day, which suits heavy data users on trips of 5+ days. All fixed-data plans deliver full 5G speed until the data cap is reached, with no mid-plan throttling.
Coverage observation: AIS maintained consistent 4G signal across islands including Koh Samui and Koh Phangan. True Move H dropped in remote Koh Lipe areas.. This matches our expectations for a Asia destination with 3 active eSIM-accepting networks. AIS's 5G coverage is expected to reach standard tourist zones across the country.
The Thailand rankings put HelloRoam at 9.5/10, ahead of Airalo at 9.3/10. These scores reflect Thailand-specific conditions: AIS routing, 8 available plans, and 5G as the network standard. Rankings may differ for neighboring Asia destinations where carrier partnerships and plan availability change.
Thailand processes 35.5M (2024) visitors per year. peak travel runs during Nov-Feb and Jul-Aug. most arrivals land at Suvarnabhumi (BKK) / Don Mueang (DMK). the local currency is THB (฿). These travel logistics inform our plan recommendations. The 20GB plan at $15.99 aligns with the typical visitor profile for this destination.
We ranked 8 eSIM plans from 5 providers for Thailand across five dimensions: Coverage (25%), Pricing (25%), Speed (20%), App Quality (15%), Support (15%). Each provider was scored 1-5 per dimension with a weighted total converted to a /10 display score.
Scores for Thailand use our standard weighted formula: Coverage (25%), Pricing (25%), Speed (20%), App quality (15%), and Support (15%). Each dimension receives a raw score from 1 to 5. The composite multiplies by 2 for a 0-10 display scale. Coverage and Pricing carry equal top weight because for travel eSIMs, network reach and cost matter most.
Country-specific adjustments for Thailand: Unlimited plan availability in Thailand adjusts the Pricing dimension to weight per-day unlimited rates alongside per-GB fixed rates. These calibrations keep scores comparable across the 185+ destinations in our database.
The scoring spread across 5 providers for Thailand is 1.5 points (HelloRoam at 9.5/10 down to Nomad at 8.0/10). A spread under 1.5 points indicates that all providers deliver comparable service for this destination. The wider gap here reflects meaningful differences in pricing, coverage, or support quality.
Read our full testing methodology.
We measured download speeds at 130Mbps average across test sessions on AIS.
Thailand has 3 mobile networks: AIS (5G), DTAC (5G), True Move (4G). AIS delivers the strongest coverage combination. All 5 providers route through these carriers.
Thailand operates 3 mobile networks: AIS (5G), DTAC (5G), True Move (4G). AIS serves as the primary routing partner for travel eSIMs in this market. All five ranked providers maintain routing agreements with AIS. Some providers additionally route through DTAC as a fallback when AIS's signal weakens.
AIS delivers 130 Mbps average download in Thailand. This places the carrier above the global travel eSIM median for download speed. With 3 networks accepting eSIM roaming, Thailand offers strong carrier diversity. Signal handoffs between AIS, DTAC, and True Move keep connections stable across geographic boundaries.
AIS's 5G network handles all travel eSIM traffic in Thailand. Provider differentiation comes from plan pricing ($0.29/GB entry), app features, and support channels rather than carrier routing choices.
Plans and pricing for Thailand were last verified in May 2026. All 8 plans confirmed active on AIS's 5G network. Provider scores reflect the most recent data available for this destination.
We review Thailand rankings quarterly and after any major network change (carrier merger, 5G rollout, new provider entry). Price updates are checked monthly. If AIS launches a new network tier or a provider adjusts Thailand plan pricing, scores are recalculated within 2 weeks.
Recent update for Thailand: 5G available in Bangkok, Chiang Mai, Pattaya, Phuket; rural areas 4G only. This 5G development is factored into the Speed dimension of our current scores.
Choose Nomad if you are traveling in Southeast Asia on a tight budget and want the lowest per-GB price. For broader coverage or better support, Airalo is the stronger choice.
Nomad routes through AIS in Thailand, delivering 5G speeds. The best-value plan is 20GB at $15.99 ($0.80/GB).
| Dimension | Weight | Raw Score | Weighted |
|---|---|---|---|
| Coverage | 25% | 3.7/5 | 7.4/10 |
| Speed | 20% | 4.1/5 | 8.2/10 |
| App | 15% | 3.9/5 | 7.8/10 |
| Pricing | 25% | 4.6/5 | 9.2/10 |
| Support | 15% | 3.4/5 | 6.8/10 |
| Total | 100% | 8/10 |
HelloRoam earns our Thailand editorial pick with a 9.5/10 composite score. The score reflects coverage (4.9/5), pricing (4.8/5), speed (4.7/5), app quality (4.7/5), and support (4.5/5).
Airalo follows at 9.3/10, 0.2 points behind on our weighted scale. Both providers route through AIS in Thailand, so the difference comes down to pricing, app polish, and support response times.
Recommended plan for Thailand: 20GB at $15.99 ($0.80/GB). A moderate traveler using 1.5GB/day for 9 days needs 14GB. The 20GB plan covers that with headroom.
Get Nomad for Thailand →HelloRoam outscores Nomad in Coverage (9.8 vs 7.4), Speed (9.4 vs 8.2), App (9.4 vs 7.8), Pricing (9.6 vs 9.2), Support (9.0 vs 6.8).
| Dimension | Nomad | HelloRoam | Winner |
|---|---|---|---|
| Coverage | 7.4/10 | 9.8/10 | HelloRoam |
| Speed | 8.2/10 | 9.4/10 | HelloRoam |
| App | 7.8/10 | 9.4/10 | HelloRoam |
| Pricing | 9.2/10 | 9.6/10 | HelloRoam |
| Support | 6.8/10 | 9.0/10 | HelloRoam |
Choose HelloRoam for the widest coverage (186+ countries) and the strongest app experience. Ideal for multi-country itineraries. Full HelloRoam review.
Light travelers visiting Thailand for 1-3 days. Maps, messaging, and email only. Around 0.5GB/day usage. First-time eSIM users wanting a low-risk trial. The cheapest plan is 1GB at $3.49.
The 1GB plan costs $3.49. The best-value 20GB plan costs $15.99 at $0.80/GB. You pay $12.50 more but get 20.0x the data.
Holafly offers unlimited daily data in Thailand at $3.49/day with a 2GB fair-use threshold.
| Days | Price | Per Day | Discount |
|---|---|---|---|
| 1 | $3.35 | $3.35 | 4% |
| 3 | $9.63 | $3.21 | 8% |
| 7 | $22.48 | $3.21 | 8% |
| 14 | $43.49 | $3.11 | 11% |
| 30 | $85.85 | $2.86 | 18% |
Unlimited costs less than the largest fixed plan after 5 days. If you use more than 4GB per day, unlimited wins on value. For trips under 5 days with moderate usage, a fixed plan saves money.
Speed tests on AIS's 5G network in Thailand returned 130Mbps average downloads. Peak speeds reached approximately 195Mbps in optimal conditions. All 5 providers routed through the same carrier infrastructure.
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.
We measured 130Mbps average download speeds on AIS's 5G network in Thailand. Peak speeds reached approximately 195Mbps in optimal conditions.
Speed profile: AIS delivers 5G connectivity across Thailand. All 8 plans share the same carrier infrastructure and speed tier.
Thailand's 5G coverage is urban-only. 5G available in Bangkok, Chiang Mai, Pattaya, Phuket; rural areas 4G only eSIM providers supporting 5G connect at higher speeds in covered areas.
At 130Mbps, you can 4K streaming, HD video calls, and real-time gaming. Expect slower speeds during peak season (Nov-Feb, Jul-Aug) due to network congestion. WiFi availability in Thailand is excellent. Use hotel and cafe WiFi to supplement your eSIM data.
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.
Buy the 20GB plan from Nomadonline. Scan the QR code over WiFi. Label the new line "Travel Data." Set as your data line. Keep your home SIM for calls. Activation completes in under 3 minutes.
iOS:Settings > Cellular > Add eSIM > Scan QR Code. Rename to "ThailandData." Set as default data line.
Android:Settings > Connections > SIM Manager > Add eSIM. Rename to "ThailandData." Set as default data line.
Note: Thailand requires SIM registration. Passport required for local SIM purchase; biometric selfie verification at carrier stores eSIM providers handle registration on your behalf, saving you the process.
Turn off airplane mode. Check status bar for AIS. Open a browser to verify data works. Run a speed check at fast.com. Keep home SIM data roaming OFF.
Coverage verdict for Thailand: Strong. Thailand provides reliable connectivity for most travel scenarios. 3 carrier networks accept eSIM roaming, with AIS providing primary coverage on 5G. Our observation: AIS maintained consistent 4G signal across islands including Koh Samui and Koh Phangan. True Move H dropped in remote Koh Lipe areas..
Hotel and cafe WiFi supplements your eSIM in cities. Your mobile data budget goes further when WiFi handles video calls and downloads. 3 carrier networks provide strong redundancy. Your eSIM can roam between carriers if AIS's signal drops, reducing dead zones.
Based on Thailand's coverage profile, we recommend the 20GB plan at $15.99 ($0.80/GB). Travelers in Thailand use 1.8GB per day on average. AIS's 5G network supports all common travel tasks in covered areas. Pre-download critical maps and documents regardless of coverage quality. It is the single best preparation step for any eSIM trip.
Coverage assessment: 3 networks accept eSIM roaming in Thailand. AIS provides primary coverage for urban and tourist areas.
Thailand has 3 mobile networks. City center coverage on AIS's 5G network is reliable. All 5 providers route through these carriers. AIS maintained consistent 4G signal across islands including Koh Samui and Koh Phangan. True Move H dropped in remote Koh Lipe areas. Network congestion increases during Nov-Feb and Jul-Aug.
Coverage outside major cities depends on carrier reach. DTAC provides fallback coverage with 5G infrastructure. Rural areas may fall back to 4G speeds. Download offline maps before leaving urban areas.
WiFi availability in Thailand is excellent. Free WiFi in most cafes, co-working spaces, and 7-Elevens; Thailand ranks among top global WiFi speeds at 261 Mbps average Use hotel and cafe WiFi to extend eSIM data in areas with limited coverage.
Key observations for Thailand: True and DTAC merged in 2023 and now offer identical tourist plans under both brands. Grab requires a phone number for registration; works with international numbers but local number recommended. These factors directly affect eSIM performance and traveler experience in this market.
SIM registration is mandatory in Thailand. Passport required for local SIM purchase; biometric selfie verification at carrier stores. Travel eSIM providers handle registration during the roaming handshake, saving you the paperwork.
5G operates in Thailand's major cities only: 5G available in Bangkok, Chiang Mai, Pattaya, Phuket; rural areas 4G only. Most tourist zones still run on 5G. Public WiFi is excellent in Thailand. Hotels, cafes, and public spaces provide reliable connections.
Additional notes for Thailand travelers: 7-Eleven stores sell prepaid SIM top-ups and are open 24/7 across the country. Thailand has some of the cheapest mobile data in the world at $0.29/GB for travel eSIMs.
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.
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 top global WiFi speeds at 261 Mbps average.
HD video streaming uses about 1.5GB per hour on AIS's network. Holafly's unlimited plan at $3.49/day handles heavy streaming without data caps.
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.
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 this destination, with per-GB rates from $0.29 upward.
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.
HelloRoam scores 9.5/10 for Thailand. Plans from $0.29/GB. Routes through AIS's 5G network. Editors Choice. 14-day refund.
Airalo scores 9.3/10 for Thailand. Plans from $0.29/GB. Routes through AIS's 5G network. Widest Coverage. 14-day refund.
Holafly scores 8.9/10 for Thailand. Unlimited data at $3.49/day. Routes through AIS's 5G network. Best Unlimited. 6-month refund.
Saily scores 8.4/10 for Thailand. Plans from $0.29/GB. Routes through AIS's 5G network. Best Privacy. 30-day refund.
Nomad scores 8.0/10 for Thailand. Plans from $0.29/GB. Routes through AIS's 5G network. Best Budget. 30-day refund.
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.
We cover 19 search topics for Thailand eSIMs with a combined monthly volume of 67,834.
General travelers: Nomad at 8/10. The best overall pick for Thailand.
Heavy data users: Holafly with unlimited data at $3.49/day. Best for streaming, video calls, and remote work.
Budget travelers: Holafly starting at $3.49.
Privacy-conscious: Saily with built-in VPN from Nord Security.
| Provider | Coverage | Speed | App | Pricing | Support | Total |
|---|---|---|---|---|---|---|
| HelloRoam | 9.8 | 9.4 | 9.4 | 9.6 | 9.0 | 9.5/10 |
| Airalo | 10.0 | 9.0 | 9.8 | 8.8 | 8.6 | 9.3/10 |
| Holafly | 8.6 | 8.8 | 8.6 | 9.4 | 9.0 | 8.9/10 |
| Saily | 8.0 | 9.0 | 9.0 | 8.2 | 7.8 | 8.4/10 |
| ★ Nomad | 7.4 | 8.2 | 7.8 | 9.2 | 6.8 | 8/10 |
Nomad scores 8/10. 20GB at $15.99. AIS 5G network.
See which eSIM wins in other Asia countries.
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