ZenSim does not provide a truly unlimited data eSIM for Switzerland. All plans that carry “Unlimited” in the name actually allow 3 GB of high‑speed data per day and after that limit the speed is reduced to 1000 kbps. The plan’s data cap is a hard limit, not a pay‑as‑you‑go credit.
Available alternatives are fixed‑data plans that give a set amount of high‑speed data for a fixed period. For example, the 40 GB plan for 30 days costs $40.50 USD, and the 20 GB plan for 15 days costs $20.70 USD. Choosing one of these fixed‑data plans is generally a more cost‑effective option unless the user expects to consume far more data than the caps allow.