MobileSIM does not provide a truly unlimited high‑speed data eSIM for Portugal. The only plans listed are fixed‑data products, such as the Portugal 80 GB for 30 days plan priced at $49.00 USD, the Portugal 50 GB for 30 days plan at $35.00 USD, or the Europe 100 GB for 180 days plan at $185.00 USD. These plans allow the specified amount of high‑speed data before reaching the cap, after which data can still be used but at a reduced speed.
One plan carries the “Unlimited” label—Europe Unlimited data for 10 days—but it actually limits usage to 3 GB per day and applies a reduced speed of 1000 kbps once the daily quota is exhausted. Because the data allowance is fixed, selecting one of the high‑cap fixed‑plan options is typically more cost‑efficient unless a user expects to consume an extremely large amount of data.