MeSIM does not provide a truly unlimited high‑speed data eSIM for travellers in Romania. All of its programmes are defined by a fixed daily high‑speed allowance – for example 500 MB/day, 1 GB/day, 2 GB/day, or 3 GB/day – and after that daily cap is reached the connection is throttled to a reduced speed such as 512 kbps or 384 kbps. Because the data limits are hard and the speed is decreased once the daily quota is exhausted, these plans are not equivalent to an unlimited offer.
If you need a higher volume of data, MeSIM offers fixed‑data plans with larger caps. For instance, the 1 GB/day plan is available for five days at about $9.44 USD, and the 2 GB/day package lasts seven days for roughly $11.65 USD. For light users these fixed‑data options tend to be more cost‑effective than selecting a plan that advertises “unlimited, ” since you pay only for the data you actually receive at full speed.