Use the coverage list for your selected plan
A country plan covers its listed destination. A regional plan can cover several countries, but the included countries vary by plan. Check the actual coverage list before paying; do not assume every country in a region is included.
Local coverage also depends on the supported networks, location, buildings, terrain and your phone. Country coverage does not guarantee a signal in every area or on a flight or cruise.
If you visit several countries, compare the broader coverage option shown on the destination page. Keep the same eSIM selected for data when entering another included country. It may take time to register on a new network.
Travelling outside the included coverage will not add that destination to your plan. Buy suitable coverage before relying on mobile data there.