Airalo does not offer a Saint Martin eSIM that includes a phone number or SMS functionality. Travelers can purchase a data‑only plan and use VoIP applications such as WhatsApp, Telegram, or iMessage to make calls and send messages, provided those services are available in Saint Martin. Because some destinations may block or restrict certain apps or VoIP services, it is advisable to confirm that the messaging or calling apps you rely on are accessible before buying a plan.