MeSIM does not provide a truly unlimited‑data eSIM for Iran. The plans that carry “unlimited” in the name give a fixed amount of high‑speed data each day—500 MB, 1 GB, or 2 GB per day—and once the daily limit is reached the speed drops to 384 kbps. These are fixed data plans rather than unlimited bundles.
Examples of these fixed plans include a 5‑day plan with 1 GB/day for $26.49 USD and a 5‑day plan with 2 GB/day for $61.99 USD. Such fixed‑data options may be more economical for moderate users, while very heavy data consumers might opt for a Pay‑as‑you‑go approach, though that is not an unlimited plan.