In short
Our picks. Tap to see today's price at Vacay
- 7–10 days, normal useBest USA 10GB, ฿249 (≈ $8.22) for 10 daysBuy at Vacay →
- 10 days or more, heavy use or you want a US numberUSA AT&T, ฿699 (≈ $23.07) for 10 days, unlimited data plus unlimited US calls and textsBuy at Vacay →
- Unlimited and a hotspot to shareBest USA Unlimited 10 Mbps, ฿519 (≈ $17.13) for 7 daysBuy at Vacay →
- Also Canada or MexicoBest Canada (+ USA, Mexico), or AT&T, which covers all threeBuy at Vacay Best Canada (+USA Mexico) →Buy at Vacay America AT&T (+Canada Mexico) →
New Vacay customers: 10% off
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Prices are from Vacay, the eSIM store GoeSIM partners with, on 21 Oct 2026, in baht. Check the current price before you buy.
The plans
| Plan | Network | US number |
|---|---|---|
| Best USA | AT&T, Verizon (roaming) | — |
| USA AT&T | AT&T (local) | ✓ |
| Best Canada (+ USA, Mexico) | Verizon, AT&T, T-Mobile (roaming) | — |
Best USA comes by the GB, unlimited or daily and works in the US only. AT&T and Best Canada also work in Canada and Mexico.
AT&T and Verizon are the two biggest US networks and cover both cities and road-trip routes.
By the GB
Full speed until the data is used up. Best USA can be topped up without changing SIM.
| Best USA | 7 days | 10 days | 15 days |
|---|---|---|---|
| 5GB | ฿129≈ $4.26 | ฿139≈ $4.59 | ฿159≈ $5.25 |
| 10GB | ฿229≈ $7.56 | ฿249≈ $8.22 | ฿279≈ $9.21 |
| 20GB | ฿409≈ $13.50 | ฿449≈ $14.82 | ฿479≈ $15.81 |
For the US only, take Best USA: the Canada pack costs about twice as much, for example 10GB for 10 days is ฿549 (≈ $18.12).
Unlimited: Best USA or AT&T
| Plan | 7 days | 10 days | 15 days |
|---|---|---|---|
| Best USA Unlimited 10 Mbps | ฿519≈ $17.13 | ฿709≈ $23.40 | ฿1,059≈ $34.95 |
| Best USA Unlimited full speed | ฿659≈ $21.75 | ฿909≈ $30.00 | ฿1,359≈ $44.85 |
| USA AT&T (with a number) | — | ฿699≈ $23.07 | ฿1,019≈ $33.63 |
For 30 days: AT&T ฿1,999 (≈ $65.97), Best USA Unlimited 10 Mbps ฿2,109 (≈ $69.60).
AT&T starts at 10 days but costs less than Best USA Unlimited at 10, 15 and 30 days, and adds a US number with unlimited calls and texts inside the US. It also works in Mexico without limits and in Canada for 25GB.
The catches with AT&T:
If you need to share data or you're staying under 10 days, take Best USA Unlimited. Its full-speed option gives 5GB a day at full speed, then 10 Mbps.
Daily plans: watch the cut-off
Best USA Daily stops completely once you reach the day's allowance, with no slow backup speed, and can't be topped up.
| Per day | 7 days | 10 days |
|---|---|---|
| 500MB | ฿89≈ $2.94 | ฿139≈ $4.59 |
| 1GB | ฿139≈ $4.59 | ฿209≈ $6.90 |
| 2GB | ฿249≈ $8.22 | ฿369≈ $12.18 |
1GB a day for 10 days (฿209 (≈ $6.90)) is only a little cheaper than 10GB for 10 days (฿249 (≈ $8.22)), and the 10GB pot lets you use more on busy days, so most trips are better off by the GB.
Which one for your trip
Before you buy
See every length and buy on the USA eSIM comparison.