Is a CoreESIM plan for Poland also valid in adjacent countries like Germany, Czechia, or Ukraine?

This particular CoreESIM data plan is configured for network access exclusively within Poland. It does not extend coverage to neighboring nations such as Germany, Czechia, or Ukraine. For instance, if you travel from Warsaw to Berlin or from Krakow to Prague, your CoreESIM service will cease at the Polish border. For uninterrupted connectivity across multiple European countries, CoreESIM recommends selecting a regional Europe eSIM or separate country-specific plans for each destination.