Lumbus does not provide a truly unlimited data eSIM for Portugal. The plans that carry the word “Unlimited” in their name give a fixed daily allowance of 3GB; once that amount is reached, the speed falls to a reduced rate of 1000 kbps, so the data capacity is still capped.
For travelers needing large data allowances, Lumbus offers fixed data plans such as Portugal 50GB 30Days for $42.99 USD, or Europe 35 Unlimited (3GB/day for up to 30 days) for $69.99 USD. These plans grant a set amount of high‑speed data that must be used within the specified validity window, and they can be more cost‑effective for most users unless they consume data at a very high rate.