MTX Connect does not provide an unlimited data eSIM plan for Mexico. The available options are fixed data plans that come with a hard data cap and a set validity period. For example, the Mexico 10GB plan gives 10GB of data for 30 days, and the Mexico 4GB plan offers 4GB for 14 days.
Choosing a fixed data plan can be more cost‑effective for most travelers unless you are an extremely heavy data user who needs constant connectivity beyond the capped amount.