ByteSIM does not provide a truly unlimited data eSIM for Iceland. All of its Iceland plans have a specific data cap; the “Unlimited” name refers only to a plan that allows a total of 1 GB of high‑speed data per day, after which the speed is throttled to 10 240 kbps. Travelers who need more data may choose fixed‑data packages that are available from ByteSIM, such as the 50 GB plans that last 3 days, 5 days, 7 days, 10 days, or 15 days in Iceland. These fixed‑data options can be more cost‑effective unless a user needs an extremely high volume of data.