Yes, AeriSIM provides unlimited data eSIM plans that cover Portugal. The company offers a range of unlimited options with validity periods from 1 day up to 30 days, all priced between $2.21 USD for the one‑day plan and $44.98 USD for the thirty‑day plan. These plans are delivered on 5G networks, but the speed may be throttled after heavy usage, with a maximum speed of 10, 000 kbps for the 1‑day plan and 5, 000 kbps for the longer‑term plans.
Because the plans are labeled as unlimited, data usage is not capped, but a Fair Usage Policy applies that can reduce speeds once a high‑volume threshold is reached. Travelers who want to confirm the exact data limits that remain at normal speed or who have concerns about possible throttling should contact AeriSIM directly before purchasing.