Keep On Roaming does not provide a truly unlimited data eSIM for Montserrat. All of its plans list a specific data cap, even those that include “Unlimited” in the name; for example, the KOR‑MS‑UNLIMITED‑1D and similar offerings provide only 1 GB of high‑speed data per listed validity period. Once the allocated data is used, the plan stops providing high‑speed data, sometimes using a reduced speed tier if that information is provided.
Travelers who need a larger amount of data can choose one of the fixed‑data plans that Keep On Roaming offers for Montserrat. A 20 GB plan for 30 days costs $84.00 USD, and a 10 GB plan for the same validity costs $50.00 USD. These plans give a sizeable fixed data allowance and may be more economical for users who consume data but do not require an unlimited data package.