Ubigi does not provide an unlimited data eSIM for Saint Martin. The available plans for that destination are fixed‑data bundles, such as a 200 GB plan valid for 360 days, a 100 GB plan also valid for 360 days, and a 60 GB plan valid for 30 days. These fixed data plans give a hard data cap 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 truly unlimited option.