怎么避免原本的 SIM 卡产生漫游费？
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常见问题
Do I need to switch off the home line entirely, or is turning off data roaming enough?+
No, you do not need to switch off the whole line. Turning off data roaming plus the other two settings on this page is enough to guard against data charges, though calls and SMS still route through the home line as normal, which is a separate matter from data.
I've disabled data switching — why does the connection still drop occasionally?+
A brief drop can simply come from weak eSIM signal at that specific spot, which is separate from falling back to the home line. Disabling data switching only prevents a silent switch to a different line — it does not fix weak signal on the line already in use.
Will OTP SMS verification from Thailand still arrive normally while abroad?+
It generally still arrives normally, since SMS is tied to the home SIM's number, not the eSIM. Still, it is worth checking with the home line's operator whether any special condition applies while roaming.
What if my phone only has a single physical SIM slot and no eSIM?+
If the phone has no eSIM support at all, this page does not directly apply, since there is no second line to switch to. Consider a physical SIM at the destination instead, or check the phone's support with our device checker first.
Are the three settings the same between iPhone and Android?+
The idea is the same, but menu locations and names differ. iPhone's menus are fairly fixed, while Android varies by manufacturer and software version. Always check the actual menu on your own device.