This depends on the specific EastESIM plan you've purchased. If your plan is designated for a single country, like Japan, it will only be active within that country. So, if you have a long layover in Seoul (South Korea) or Taipei (Taiwan) before continuing to Japan, your Japan-specific eSIM will not provide data during your transit. For multi-country itineraries or long layovers, we recommend considering our Regional Asia eSIM plans, which offer coverage across several countries, ensuring you're connected from the moment you land, anywhere in the region.
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Is my EastESIM valid during a layover in Seoul if my plan is for Japan?
Updated April 22, 2026
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