Saily does not offer true unlimited data eSIM plans for Belgium. The plans that contain the word “UNLIMITED” in their title actually include a data allowance of 5GB per day for the span of 10 to 30 days, after which high‑speed service is throttled to 1024kbps. Because of this daily cap and speed reduction, the plans are not unlimited in the sense of providing unthrottled high‑speed data indefinitely.
For travelers who need a fixed amount of data on a national network, Saily offers several straightforward options. For example, the Belgium 20 GB plan for 30 days costs $26.99, while a Belgium 10 GB plan for 30 days is $17.99. These fixed‑data plans can be more economical unless a user expects to consume significantly more data.