Bordersim does not provide an unlimited data eSIM plan for Saint Martin. The available options are fixed‑data bundles, such as the Saint Martin 20 GB 30Days plan costing $13.49 USD and the Saint Martin 10 GB 30Days plan costing $7.49 USD, both with 5G connectivity and tethering allowed. For travelers who need a large data allowance, a fixed plan may be more cost‑effective; however, none of the listed plans offer unlimited data.