nextSIM does not provide a truly unlimited data eSIM for Luxembourg. All the plans listed for Luxembourg give a fixed amount of high‑speed data—typically 1 GB per day or a larger set‑up such as 100 GB over 30 days, or 50 GB over 30 days. After the allocated data is used, the speed is reduced (for example to 512 kbps or 2000 kbps) rather than remaining unlimited.
If a traveller needs more data, nextSIM offers fixed‑data plans with sizable allowances. The 100 GB 30 days Luxembourg plan and the 50 GB 30 days Luxembourg plan are examples of large‑capacity options that remain inexpensive for most moderate to heavy data users. Choosing a fixed‑data plan can be more cost‑effective than purchasing multiple short‑term “unlimited” titles, which are actually capped at 1 GB per day.