Is EU 'Roam Like at Home' functionality applicable in St. Barths with a French or EU SIM card?

Despite its status as a French collectivity, St. Barths is explicitly excluded from the European Union's 'Roam Like at Home' regulatory framework. Consequently, standard EU mobile plans, including those from French carriers like Orange France or SFR, will incur international roaming charges. Users should anticipate significant out-of-bundle costs. CoreESIM advises utilizing a dedicated local or regional eSIM for data connectivity in St. Barths to avoid unexpected expenditures.