Is this CoreESIM valid for ferry travel to <strong>Dominica</strong>, <strong>Martinique</strong>, or <strong>Saint Lucia</strong>?

This CoreESIM plan is specifically designed for Guadeloupe and Martinique, as both are overseas departments of France and thus fall under the EU's telecommunications regulations. However, it will not provide service in Dominica or Saint Lucia, which are independent, non-EU sovereign nations with distinct network infrastructures. Travelers planning multi-island excursions must ensure their eSIM plan explicitly covers each independent country they intend to visit, as coverage ceases at international maritime borders.