Savings Calculator
How Much You Save with eSIM vs Carrier Roaming in Thailand (2026)
Carrier roaming in Thailand runs $10-$15/day. A 9-day trip costs $90-$135. An eSIM on AIS delivers the same connection for $15.99. The math below shows exactly how much you keep.
Your carrier's roaming rate in Thailand
| Carrier | Plan | Daily Rate | 7-Day Cost |
|---|---|---|---|
| AT&T | International Day Pass | $10/day | $70 |
| Verizon | TravelPass | $10/day | $70 |
| T-Mobile | Magenta (high-speed add-on) | $15/day | $105 |
AT&T International Day Pass
AT&T does not require you to enable the $10/day Thailand pass manually. Your phone connects to AIS automatically on landing. The charge appears unless data roaming is switched off before the plane door opens.
Verizon TravelPass
One week of Verizon roaming in Thailand costs $70 ($10/day through AIS). An eSIM on AIS starts at $0.29/GB for the same connection.
T-Mobile Magenta (high-speed add-on)
T-Mobile's International Day Pass in Thailand runs on AIS at $15/day. A travel eSIM delivers identical coverage from $0.29/GB.
eSIM alternative cost for Thailand
Plan tiers for Thailand
| Tier | Price | Per GB |
|---|---|---|
| 1GB | $3.49 | $3.49 |
| 3GB | $4.99 | $1.66 |
| 5GB | $6.99 | $1.40 |
| 10GB | $9.97 | $1 |
| 20GBBest fit | $15.99 | $0.80 |
Unlimited daily option
| Days | Price | Per Day | Discount |
|---|---|---|---|
| 1 days | $3.35 | $3.35 | 4% |
| 3 days | $9.63 | $3.21 | 8% |
| 7 days | $22.48 | $3.21 | 8% |
| 14 days | $43.49 | $3.11 | 11% |
| 30 days | $85.85 | $2.86 | 18% |
Which provider covers Thailand
The primary provider for Thailand is Airalo, connecting to AIS's 5G network. Compare all eSIM providers
Savings breakdown
| Trip Length | AT&T | Verizon | T-Mobile HS | eSIM | You Save |
|---|---|---|---|---|---|
| 3 days | $30 | $30 | $45 | $6.99 | $23.01 (77%) |
| 7 days | $70 | $70 | $105 | $15.99 | $54.01 (77%) |
| 14 days | $140 | $140 | $210 | $15.99 | $124.01 (89%) |
| 21 days | $210 | $210 | $315 | $15.99 | $194.01 (92%) |
| 30 days | $300 | $300 | $450 | $15.99 | $284.01 (95%) |
Family and group savings
Carrier roaming charges multiply per person. eSIM savings multiply even faster for groups.
Solo traveler
Carrier: $90
eSIM: $15.99
Save $74.01
Couple
Carrier: $180
eSIM: $31.98
Save $148.02
Family of 4
Carrier: $360
eSIM: $63.96
Save $296.04
Trip length calculator
How much data you need
Maps & navigation
50 MB/hr
Social media
80 MB/hr
Video calls
250 MB/hr
Photo uploads
10 MB/photo
Music streaming
70 MB/hr
Web browsing
60 MB/hr
WiFi availability in Thailand
WiFi in Thailand is rated excellent. Free WiFi in most cafes, co-working spaces, and 7-Elevens; Thailand ranks among top global WiFi speeds at 261 Mbps average
Real savings scenarios for Thailand
Solo traveler
Solo trip to Thailand, 9 days. AT&T: $10/day x 9 = $90. Verizon: $10/day x 9 = $90. T-Mobile high-speed: $15/day x 9 = $135. eSIM 20GB on AIS: $15.99. The eSIM saves $74.01 vs AT&T, $74.01 vs Verizon, and $119.01 vs T-Mobile's paid tier.
Family trip
Families with mixed carriers — one parent on AT&T, one on Verizon, kids on T-Mobile — face $50/day in combined roaming for Thailand. Over 9 days: $450. Four eSIMs on AIS at $15.99 each: $63.96. Savings: $386.04. One purchase per person, no coordination between carriers.
Business trip
Five employees attending a conference in Thailand for 5 days: AT&T roaming for the team: 5 x $10/day x 5 = $250. Five 20GB eSIMs: $79.95. Team savings: $170.05. All five connect to AIS's 5G network. The eSIM receipts are cleaner for expense processing: one charge per person, no daily line items.
Long-stay and digital nomads
Seasonal residents spending 60-90 days in Thailand: AT&T roaming at $10/day for 60 days = $600. For 90 days: $900. An unlimited eSIM at $3.49/day for 90 days: $314.10. At these durations, a local SIM card or a monthly local plan becomes the most cost-effective option. But compared to keeping AT&T or Verizon roaming active, an eSIM saves $821.70 over a 90-day stay.
Frequent traveler annual savings
If Thailand is one stop on a multi-destination travel year: AT&T charges $10/day in every country. eSIM prices vary by destination. For Thailand alone: $90 (AT&T) vs $15.99 (eSIM) per 9-day trip. Across 4 international trips averaging 9 days each, AT&T charges $360 in roaming alone. eSIMs for the same itineraries run 80-95% less per trip.
Extended stay economics
A remote worker billing a client for Thailand connectivity: AT&T line item: $300/month. Coworking space WiFi in Thailand: $50-$150/month. eSIM on AIS: $17.40/month. The eSIM provides cellular backup when coworking WiFi drops during client calls. AT&T's Day Pass does the same but costs $282.60 more per month. Over a 3-month stay: AT&T totals $900, eSIM totals $52.20.
Frequent flyer savings
AT&T roaming of $90 for 9 days in Thailand represents 3-7% of a typical international trip budget ($1,500-$3,000 for flights, hotel, food). An eSIM at $15.99 drops that line item to under 1%. Over 2 annual trips, roaming goes from $180 to $31.98. That $148.02 pays for an extra dinner and museum visit per trip.
Data usage savings
A traveler using Google Maps 3 hours/day in Thailand consumes 24 MB/day in navigation data. Over 9 days: 216 MB (0.2 GB). AT&T charges $10/day regardless of how little data you use. An eSIM at $0.29/GB on AIS charges $0.06 for navigation alone. The eSIM's per-activity cost is a fraction of the per-day fee.
Couples trip savings
One partner on AT&T, one on Verizon, traveling together to Thailand: AT&T line: $90. Verizon line: $90. Combined: $180. Two eSIMs on AIS: $31.98. Savings: $148.02. Both partners disable carrier data roaming and keep their home SIMs active for calls only.
UK carrier comparison
Vodafone Roaming Passport charges GBP6/day in Thailand. Over 9 days: GBP54 (approximately $69 USD at current exchange rates). A 20GB eSIM on AIS: $15.99 (USD). Savings in USD terms: roughly $38.01. Both options connect to AIS's 5G towers in Thailand.
Airport SIM vs eSIM
Thailand's Suvarnabhumi (BKK) / Don Mueang (DMK) offers prepaid SIMs at $8-23 for unlimited data / 7-15 days with a 5-10 min; counters open 24 hours wait. An eSIM installs before your flight and activates on landing — no queue, no paperwork.
Our verdict
Bottom line for Thailand: the eSIM wins. $15.99 for 20GB on AIS vs $90 on AT&T for 9 days. Same towers, same speeds, 82% lower cost. No daily triggers, no per-MB billing, no bill surprises from background app syncs.
How much can I save with eSIM in Thailand?
eSIM savings in Thailand scale with trip length. A 7-day trip saves $54.01 vs AT&T ($70 roaming vs $15.99 eSIM). A 14-day trip saves $124.01 ($140 vs $15.99). Both connect to AIS's network. Rates verified May 2026.
How much does roaming cost in Thailand?
Roaming in Thailand costs $10/day on AT&T ($90 for 9 days), $10/day on Verizon ($90), and $15/day on T-Mobile for high-speed data ($135). A travel eSIM on AIS costs $15.99 for 20GB. Rates verified May 2026.
Thailand network context
Local networks
Thailand has 3 mobile networks. The primary carriers are AIS, True Move H, DTAC.
Speed and coverage
Average download speeds reach 130 Mbps in Thailand. 5G coverage is urban-only. 5G available in Bangkok, Chiang Mai, Pattaya, Phuket; rural areas 4G only Both carrier roaming and eSIM connect to the same local infrastructure.
Connectivity notes
- True and DTAC merged in 2023 — now offer identical tourist plans under both brands
- Grab requires a phone number for registration; works with international numbers but local number recommended
- 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
- Free WiFi on Bangkok BTS Skytrain and MRT stations
Good to know
In Thailand, dial 191/1669 for emergency services. Calling 112 may not connect on all networks. This number works on any active SIM or eSIM, including plans with exhausted data balances.
Quick tip
WiFi availability in Thailand is rated excellent. Enabling WiFi Calling on your phone before departure lets you receive calls and texts over hotel or cafe WiFi without triggering a carrier roaming day pass.
Frequently asked questions
- How much does AT&T roaming cost for 9 days in Thailand?
- AT&T International Day Pass charges $10/day in Thailand. A 9-day trip costs $90 in roaming charges. This activates automatically when your phone connects to a local network abroad.
- Is a travel eSIM cheaper than Verizon TravelPass in Thailand?
- Verizon TravelPass charges $10/day in Thailand. A 9-day trip costs $90. A 20GB eSIM covers the same trip for $15.99 on the same local network — saving you 82%.
- How much data do I need for a week in Thailand?
- Most travelers use 1-2 GB per day for maps, messaging, social media, and light browsing. A 7-day trip needs 7-14 GB. Video calls and streaming push usage to 3+ GB per day. Choose a 10GB or 20GB plan for heavy use.
- Can a family share one eSIM in Thailand?
- One eSIM stays in one phone, but most eSIM plans allow tethering (personal hotspot). A family of 4 can share a single 10-20GB eSIM through one phone's hotspot instead of paying $10/day per person for carrier roaming.
- Does T-Mobile free data work in Thailand?
- T-Mobile Magenta includes free data in Thailand, but speed is capped at 256 Kbps. That is too slow for Google Maps, video calls, or uploading photos. The high-speed add-on costs $15/day.
- How much does a 30-day eSIM cost for Thailand?
- A 30-day eSIM for Thailand depends on data volume. Metered plans (5-20GB) typically range from $8 to $35. Unlimited daily plans run $1-2/day. Both connect to the same local network as carrier roaming at a fraction of the cost.
- Is buying a local SIM cheaper than an eSIM in Thailand?
- Local prepaid SIMs in Thailand can be cheaper per GB, but require visiting a store, showing ID, and waiting for activation. An eSIM installs before your flight and activates on landing — no queue, no paperwork, no wasted vacation time.
- How much does carrier roaming cost in Thailand?
- T-Mobile includes Thailand in its free international plan, but throttles every connection to 256 Kbps — one-eighth the speed of basic 2G. AT&T costs $10/day, Verizon costs $10/day. A travel eSIM on AIS at $3.49 for 1GB provides full 5G — the same towers, none of the speed cap, and less money than either paid carrier option.
- Is T-Mobile's free international data fast enough in Thailand?
- No. T-Mobile caps free international data at 256 Kbps in Thailand — one-eighth the speed of basic 2G. At that rate, Google Maps takes 15+ seconds to load a single tile and will not work for navigation. Streaming video requires at least 1.5 Mbps; video calls need 2 Mbps. Basic WhatsApp text messages work, but anything else does not. T-Mobile's high-speed add-on for Thailand costs $15/day. A travel eSIM on AIS's 5G network delivers full local speeds at $0.29/GB — cheaper per GB than the speed upgrade.
- How is my roaming bill calculated in Thailand?
- Your carrier uses one of two models. Per-day billing: AT&T charges $10 and Verizon charges $10 for each calendar day your phone connects in Thailand — even if you only check a notification at midnight. Per-MB billing: without a day pass, AT&T charges $2.05 per megabyte, which adds up to $2,099 per GB. Both models penalize casual background data usage. A travel eSIM uses flat-rate billing — you pay 1GB for $3.49 upfront, with no per-day activations and no per-MB overages. Once purchased, the cost is fixed regardless of usage patterns.
- Can I get a refund on a travel eSIM for Thailand if I don't use it?
- Refund policies vary by provider. Most eSIM providers offer a full refund only if the plan has never been installed or activated. Once the QR code is scanned and the profile downloaded to your device, refunds are rarely issued even if you never traveled. AT&T International Day Pass at $10/day can be cancelled before departure — your account is only billed on days the pass activates in Thailand. For an eSIM on AIS at $0.29/GB, read the refund clause before purchase. Plans under $10 total carry no refund window regardless of usage. Rates checked June 2026.
- How do I set up a dual-SIM Android phone for Thailand?
- On Android, go to Settings > Network & Internet > SIMs. Your physical home SIM and the travel eSIM for Thailand appear as two separate SIM slots. Set the eSIM as the default for mobile data. Set your home SIM as the default for calls. Enable WiFi Calling on your home SIM to keep your number active for free over WiFi. The eSIM connects to AIS's 5G network at $0.29/GB. With data roaming disabled on your home SIM, AT&T's $10/day and Verizon's $10/day fees cannot trigger. Steps vary slightly by manufacturer — Samsung, Google Pixel, and OnePlus all use this core settings path. Rates checked June 2026.