ZenSim does not provide a truly unlimited data eSIM for Czech Republic. The plans marketed under the “Unlimited” name actually offer 2 GB per day, meaning usage beyond that amount will trigger a speed reduction (the reduced speed value is not published). Travelers who need larger data allowances can choose from the fixed‑data options in the catalogue. For example, ZenSim offers a 20 GB plan valid for 10 days at $20.00 USD and a 20 GB plan valid for 30 days at $21.00 USD for Europe+ coverage, plus an equivalent 20 GB plan for Czech Republic alone. Selecting a fixed data plan can be more cost‑effective for those who require substantial data but not necessarily high‑speed unlimited connectivity.