United States → ประเทศไทย
Data in ประเทศไทย, flying from United States.
AT&T roaming $120 10 days · standard rate, outside your bundle
eSIM Coffee — 10 days · no surprise on the bill
The number the others hide
3 GB/dayAt full speed. After that, 1 Mbps until the counter resets — 24 h after activation, not at midnight.
- Networks
- AIS
- Validity
- 10 days from activation
- Calls and SMS
- on your United States number, via apps
“Just add my carrier’s roaming pack” is the real alternative
It is one tap in an app you already have, from a company that already has your card. That is a genuinely good reason to choose it, and no comparison table beats convenience on its own.
- AT&T roaming
- What it costs is the difference above — per day of use, billed afterwards.
- eSIM Coffee
- What this costs is two minutes, once, before you fly.
What changes when you fly from United States
Carriers in United States — AT&T, Verizon, T-Mobile — charge roaming in ประเทศไทย per day of use. On a 10-day trip that approaches $120, and the bill arrives afterwards.
Before you fly
- Check your phone supports eSIM and is unlocked — the ten-second test.
- Install the eSIM at home, on Wi-Fi. Installing needs internet; activating does not.
- Turn data roaming OFF on your home SIM. That is the step that prevents the unpleasant bill.
- On landing, switch data to the eSIM and leave roaming ON for it.