Bordersim does not offer Saint Barthélemy eSIM plans that come with a phone number or SMS capability. Travelers can only purchase data‑only eSIMs and will need to rely on VoIP applications such as WhatsApp, Telegram, or iMessage for calls and messaging. However, some destinations restrict or block these services, so it is advisable to confirm that the apps you rely on are accessible in Saint Barthélemy before making a purchase.