Is this CoreESIM plan valid for data usage in adjacent non-EU countries like Turkey or Albania?

This specific CoreESIM plan is exclusively configured for data usage within Greece and the broader EU roaming zone. It is critical to note that its validity does not extend to non-EU countries, even those geographically proximate. For instance, if your itinerary includes a port call in Kuşadası (Turkey) or a ferry crossing to Albania, your CoreESIM data service will cease to function upon entering these territories. For continuous connectivity in such adjacent non-EU nations, a separate, multi-country or region-specific eSIM would be necessary.