No, GigSky does not provide an unlimited‑data eSIM for Montserrat. All of its available plans for the island have a fixed data cap, such as the World Plan Lite 100GB for 180 days or the Caribbean 50GB for 90 days, which must be used within the specified validity period. These fixed data plans can be a more cost‑effective choice for most travelers, unless they need to consume data beyond the set allowance.