NO, Saint Vincent and the Grenadines (sovereign state of the Lesser Antilles, chain of paradisiac islands between Saint Lucia and Grenada) is outside the EU — telecom roaming is billed at high rates. The Alosea Saint Vincent eSIM is essential for sailors (the Grenadines are one of the world's most beautiful sailing playgrounds — Tobago Cays mooring paradise), Mustique (celebrity private island) or Pirates of the Caribbean enthusiasts (Wallilabou Bay filming). You connect to Flow SVG or Digicel SVG upon landing at Argyle (SVD).