mysim24 does not have a plan that offers truly unlimited high‑speed data for Spain. Every plan listed for Spain in the dataset has a specific data cap, such as 1 GB or 2 GB per day, after which the speed is throttled to a modest level (e.g., 512 kbps or 2 Mbps). The “Unlimited” label in some plan names only refers to the fact that the data can be used indefinitely once the daily high‑speed allowance is exhausted, not to an uncapped high‑speed data supply.
If an unrestricted data volume is required, travelers can choose fixed‑data plans that provide a larger allowance for a set validity period. For example, the Spain 20 GB Unlimited calls SMS 31 days plan offers 20 GB of high‑speed data for a month, while the Spain 100 GB Unlimited calls SMS 31 days (or 30 days) plan gives 100 GB of high‑speed data for a month. These fixed‑data options are often more cost‑effective for heavy usage than the daily “Unlimited” plans that include a speed downgrade after the allotted data is used.