GigSky does not provide an eSIM for the Cayman Islands that includes a phone number or SMS capability; only data‑only plans are available. Travelers who need voice or text services can use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection. Those apps may work, but the availability of VoIP services can vary per destination, so it is advisable to verify that the particular services you rely on are accessible in the Cayman Islands before purchasing an eSIM.