eSIMX does not provide an unlimited data eSIM plan for Belgium.
The provider offers only fixed data plans, such as the Europe 100GB 30Days With Calls plan, which grants 100GB of high‑speed data for 30 days, and the Belgium 30GB 7Days plan, which supplies 30GB of data for seven days. These options give large data allowances, but they are not unlimited.
Choosing a fixed data plan may be more cost‑effective unless a traveler needs an extremely high data volume.