MeSIM does not provide a truly unlimited high‑speed data eSIM for Croatia. All of its plans list a concrete data allowance—such as 500 MB/day, 1 GB/day, 2 GB/day or higher—along with a fixed validity period. After the high‑speed entitlement is used, the speed is throttled to a reduced rate (typically 512 kbps or 384 kbps), so the plan is not unlimited.
Travelers who need more data can choose one of MeSIM’s fixed‑data plans as an alternative. For example, the Europe 33‑countries 3‑day unlimited eSIM offers 1 GB/day of high‑speed data for 3 days (total 3 GB), while the Europe 33‑countries 20‑day unlimited eSIM gives 500 MB/day for 20 days (total 10 GB). Larger packages such as the Europe–orange holiday 500 GB for 90 days also provide a substantial amount of data, though they are also bound by a validity period and reduced speeds after the high‑speed allowance.