Bordersim does not provide an unlimited data eSIM for Montserrat. The available options are fixed data plans that include 20GB for 30 days, 10GB for 30 days, 5GB for 30 days, 3GB for 15 days, and 3GB for 30 days. Each plan has a set data allowance that must be used within the specified validity period.
Choosing a fixed data plan can be more cost‑effective for most travelers, unless the user is an extremely heavy data consumer who would benefit from a pay‑as‑you‑go model.