eSIMCard does not provide a truly unlimited data eSIM for Spain. All of its plans that use the word “Unlimited” are actually capped at a certain amount of high‑speed data—typically 1 GB or 2 GB per day—and the connection is throttled after that limit is reached. The throttled speeds differ from plan to plan; for example the 1 GB/day plans reduce speed to 512 kbps, while the 2 GB/day plans reduce to 2 Mbps.
If unlimited high‑speed data is a priority, eSIMCard offers fixed‑data alternatives that avoid throttling. In Spain, a 50 GB plan for 30 days costs $31.39, a 35 GB plan for the same period also costs $31.39, and a larger 200 GB plan for 31 days is priced at $56.47. These larger plans can be more cost‑effective for heavy data users who want consistent speeds.