Generally not from payment, but from whatever point the plan defines — usually installation or activation, or the first connection to a network at the destination. Different plans use different triggers, so read that plan's own details before installing, especially if you intend to install days ahead.

It depends on the plan's trigger. If it counts from installation, the days begin immediately even while you are still at home. If it counts from first connection abroad, installing early costs nothing. That is exactly why this term is worth reading before tapping install rather than afterwards.

As a rule, no — unused data ends with that plan's validity. The specifics depend on the supplier and the plan, so if this matters to your decision, read the terms on the plan page before buying, or ask the team to check what information is available.

It depends on the plan: some support topping up, while others require buying and installing a fresh plan. If the trip might stretch, check this before the first purchase so the decision is quick when it arises, rather than researching it as the plan is about to lapse.

Do not rush. On most devices deleting a profile cannot be undone, and often the same profile cannot be reinstalled. If you want it gone because the device is full or the plan is genuinely finished, confirm the status with the supplier first, or ask the team on LINE or by email to check before you tap delete.

Not from the phone's usage screen: the handset only knows what it has counted and nothing about the plan's validity terms. Look instead at the supplier's own channel — the order confirmation email or the management page provided at purchase, which differs between suppliers. If you cannot find it, message us with the order details and the team will check during working hours.