TailSim does not provide a true unlimited data eSIM for Belgium. Travelers can purchase fixed‑data plans such as the Belgium – 50 GB – 30 days plan, which offers 50 GB of high‑speed 5G data valid for 30 days, or the Belgium – 20 GB – 30 days or 10 GB – 30 days options. These plans have clear data limits and a fixed validity period. Selecting a fixed data plan can be more cost effective for most users, especially if they are not extremely heavy data consumers.