eSIMCard does not offer a truly unlimited data eSIM plan for Spain. Every plan listed in the data has a specific data cap—most of them provide 1 GB or 2 GB of high‑speed data per day, after which the speed is throttled to 512 kbps or 2000 kbps. Even the plans whose names contain “Unlimited” are limited in that way; they simply allow larger volumes of data before throttling begins.
If a larger data allotment is preferable, eSIMCard offers fixed‑data alternatives such as the 50 GB Data & Unlimited Minutes plan for 30 days at $31.39 USD, or the 35 GB Data & Unlimited Minutes plan for the same period and price. These provide a set amount of high‑speed data without the unlimited “true” designation.