ZenSim does not provide a truly unlimited eSIM plan for Portugal. The plans titled “Portugal Unlimited” actually cap data at 3 GB per day; after this limit is reached the speed is reduced, although the exact throttled speed is not specified. Therefore, these plans do not offer unrestricted high‑speed data.
For travelers who need more data, ZenSim offers fixed‑amount plans such as 20 GB for 10 days or 30 days, and a 10 GB option for 10 days. These higher‑capacity plans provide a steady data allowance throughout the validity period and can be more cost effective for users who anticipate high data consumption.