No, nextSIM does not offer any truly unlimited data eSIM for Saint Martin. The plans that contain “Unlimited” in their name actually provide a fixed amount of high‑speed data (for example 1 GB or 2 GB) and then throttle the speed to 512 kbps or 2000 kbps once that limit is reached. The name was used only to distinguish these packages from other data bundles but they are not unlimited in the sense of having no data cap.
Instead, nextSIM offers a range of fixed‑data plans for Saint Martin, such as the eSIM Saint‑Martin 10GB 30Days plan for 30 days at $39.41 USD and the eSIM Saint‑Martin 5GB 30Days plan for 30 days at $25.33 USD. These plans provide a set amount of high‑speed data without a subsequent reduction in speed, and they may be more cost‑effective for travelers who do not require an unlimited data allowance.