Is this EastESIM plan valid if I take a ferry to neighboring islands like Martinique or St. Vincent?

This specific EastESIM plan is tailored for connectivity exclusively within Saint Lucia. If your travel plans include taking a ferry to nearby islands, it's important to note that your connection will typically cease once you leave Saint Lucia's network. For instance, a ferry to Martinique (which is French territory) or south to St. Vincent will take you to different countries. For seamless connectivity across multiple Caribbean destinations, consider an EastESIM regional plan designed for broader coverage.