Read the plan page and the terms attached to your order, because this is set by the supplier behind each plan rather than being a property of your handset or of eSIM in general. If it is still unclear, send the order reference to LINE @esimonline or esimonline.asia@gmail.com and we will check it for you.

Not always. Some plans add data while the expiry date stays where it was, some treat an extension as a separate purchase, and some combine the two. Read that plan's terms before paying, because if the validity is about to end, added data can expire before you get to use it.

It depends on the plan, but in practice you should top up while data remains, because buying and confirming both need an internet connection. If you wait until the balance is empty with no Wi-Fi nearby, you cannot complete anything. Treat the last of your data as the tool you need to make the next purchase.

Normally no, because the whole point of a top-up is to keep using the same profile. If you are asked to install a new profile, you are buying a new plan rather than topping up. Make sure which of the two you are doing before you pay, because they end differently.

Yes, provided the plan supports it and you have a connection to complete the transaction, whether that is Wi-Fi at your accommodation, a cafe, an airport or the data still left on the phone. The thing to avoid is waiting until nothing is left, since payment and confirmation both need a connection.

Strongly not. Deleting an eSIM profile is usually irreversible, and it converts a problem that a short wait might solve into one that only a fresh purchase can. Wait, re-check the balance, toggle flight mode once, and if it still has not landed, contact us with the order reference, the transaction time and screenshots.