No, eSIMatrix does not offer an unlimited data eSIM for El Salvador. The plans available for the country all come with fixed data allowances. For example, eSIMatrix sells a 20GB plan that can be used for 5 days, 10 days, 15 days, or 30 days, and a similar 20GB plan that covers El Salvador plus 16 other South American countries for 5 days. These plans represent only a subset of the fixed‑data offerings and are chosen for their relatively large data caps. If a traveler anticipates very high data usage, a fixed‑data plan may still be more cost‑effective than an unlimited option, but such an option is not provided by eSIMatrix for El Salvador.