How does refilling and activating a refill work?

If you purchase a card and have it activated, for example, on April 1, 2022, the data is valid until April 1, 2023. If you still have unused data after 365 days, it will unfortunately expire.

If you add more data to the existing card activated on April 1, 2022, before the data expires, for example, by refilling on August 5, 2022, the new data will then be valid until August 5, 2023. If you refill before the expiration date while still having remaining data, the unused data will not be lost and can be used until April 1, 2023. The new data is added to the existing balance. This means the original data can be used until April 1, 2023, and the new data until August 5, 2023. (Dates are examples.)