MoodSIM does not provide a genuinely unlimited high‑speed eSIM for Iceland. All plans with “Unlimited” in the name give a fixed daily data amount and then throttle speed to a lower value. For example, the Iceland Unlimited (1 GB/day, then 512 Kbps) 1 Day plan costs $0.99 and drops to 512 Kbps after the first gigabyte, while the Iceland Unlimited (10 GB/day, then 512 Kbps) 1 Day plan costs $5.49 and thins to 512 Kbps after ten gigabytes. These plans are fixed data bundles; if a traveler wants unrestricted data, they would need to choose a larger fixed‑data plan such as the Iceland 50 GB 30 Days or the Iceland 100 GB 180 Days options.