MeSIM does not offer a truly unlimited high‑speed eSIM plan for Belgium.
All of its “unlimited” offers provide a fixed high‑speed allowance, such as 500 MB per day or 1 GB per day, after which the speed is reduced to a throttled rate of 384 kbps or 512 kbps. Because of this, unlimited plans are not available.
For travelers who need a large data allowance, MeSIM does provide fixed data plans. Examples include the 100 GB plan valid for 180 days, the 200 GB for 30 days, or the 500 GB for 90 days. These plans give high‑speed data up to the specified amount and can be a more cost‑effective choice for heavy‑usage users compared with the limited‑high‑speed “unlimited” options.