A plan bought from us is paid up front at the price you saw, and it adds nothing to your existing number. But if that number still has data roaming enabled and activity occurs on it, its operator can still charge under its own terms. The way to close that off is to switch the home line's data roaming off, per line, before you travel.

Because we are not that operator and do not represent them. Rates change and differ by the plan each customer holds, so passing figures along could have you planning around information that does not fit your case. The right route is to ask your own operator, who are the only ones who can see the terms actually attached to your plan.

No. Most travel eSIM profiles work in a roaming state on a partner network in the destination country, so switching roaming off phone-wide would stop the plan you just bought from connecting. Switch data roaming off on the home line only, and leave it enabled for the destination profile as its provider instructs.

It depends on your operator and plan; an incoming call is not free in every case, so it is not safe to assume. If it matters to your trip, ask before flying exactly how incoming calls and voicemail are charged, and then decide whether to keep that line on or switch it off for a while.

Switch that line's data roaming off straight away and confirm the data line now points at the destination profile. Then contact that number's operator to ask about the usage recorded, since they are the only ones who can see the detail and the only ones who can consider the charge. We cannot inspect or adjust another operator's bill.

You can, but accept the limitation: you will have no connection whenever you leave the accommodation, which is exactly when maps, ride-hailing and looking things up matter most. And even on Wi-Fi only, the home line's data roaming should still be switched off, because the phone will try to fall back to mobile data automatically once you walk out of Wi-Fi range.