eSimfly does not provide a truly unlimited data eSIM for Luxembourg. All plans that carry the word “Unlimited” in their name give a fixed amount of high‑speed data per day—3GB/day—and after that limit the speed to 1000kbps. The largest data allowance offered is the O2 Unlimited (International) plan, which supplies 35GB for 30 days.
Travelers who need more data can choose a fixed data plan such as the Luxembourg Unlimited 30 Days plan, which delivers 3GB/day for 30 days, or the O2 Unlimited (International) plan with 35GB for 30 days. These options are cost‑effective for most users and do not have an unlimited data cap.