SimOptions does not provide a Saint Lucia eSIM plan that includes a phone number or SMS capability. Only data‑only eSIMs are sold for travel to Saint Lucia, so travelers can use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection for voice and messaging. Those services may still work in Saint Lucia, but some destinations block or restrict access to specific apps, so it is a good idea to confirm that the apps you rely on will function before purchasing.