Jetpac does not provide a genuine unlimited data plan for South Korea. The two plans that carry the label “Unlimited” give 3 GB of high‑speed data each day; once that daily allotment is reached the speed is reduced to 1024 kbps. There is no plan that offers unlimited high‑speed data without a cap.
Jetpac does offer fixed‑data plans for the South Korean market. Examples include the South Korea 40 GB plan valid for 30 days and the South Korea 30 GB plan also valid for 30 days. These plans deliver a large amount of high‑speed data and may be more cost‑effective for travelers who are not extremely heavy data users.