BetterRoaming does not offer a Saint Martin eSIM that includes a phone number or SMS capability. Only data‑only eSIM plans are available for Saint Martin. Travelers can use VoIP applications such as WhatsApp, Telegram, and iMessage over the data connection to make calls and send messages, but some destinations may restrict access to these services, so it is advisable to verify that the apps you rely on are available in Saint Martin before purchasing a plan.