eSIMCard does not provide a true unlimited data eSIM for El Salvador. All of their plans list a specific data cap—either 1 GB per day or larger fixed amounts—and they are labeled “Unlimited” only because they allow the full amount before throttling. After the cap the speed is reduced to 512 kbps for 1 GB plans or 2 000 kbps for the 2 GB plans, so the high‑speed data is not unlimited.
If a larger data allowance is preferable, eSIMCard offers fixed‑cover plans, such as 100 GB for 30 days at $325.55 USD or 50 GB for 30 days at $179.55 USD. These plans provide a substantial amount of high‑speed data without the throttling that occurs on the so‑called unlimited options. Choosing a fixed‑data plan may be more cost‑effective for heavy data users.