Airalo does not offer a true unlimited data eSIM for Belgium. The plans that carry the label “Unlimited” actually provide 3GB of high‑speed data each day, after which the speed is reduced to 1Mbps, so the amount is still capped. Travelers who need a larger, unrestricted data allowance can choose from fixed‑data plans such as the 100GB plan for 180 days or the 50GB plans that are valid for 30 days, which give unlimited high‑speed data within the set validity period. These fixed plans can be more cost‑effective for heavy data users.