MeSIM does not provide a true unlimited‑data eSIM for Tanzania. The plans that carry the word “unlimited” in their names give a set amount of high‑speed data per day—500MB, 1GB, or 2GB—and once that allowance is used the connection is reduced to 384 kbps. This is still a capped plan with a throttled speed after the limit is reached, not an unlimited data service.
If you need a larger burst of high‑speed data, MeSIM offers fixed data plans that allow substantial usage, such as the 50GB plans that run for 3, 5, 7, 10, 15, or 50 days. These plans give a clear data amount without subsequent speed reduction, and can be more cost‑effective for travelers who use a lot of data but do not require truly unlimited data.