Wiiline does not offer a truly unlimited data eSIM for South Korea. Every plan listed has a hard data cap; after the cap is reached the speed is reduced to 384 kbps (or another throttled speed if specified). The plans are fixed‑data plans that provide a set amount of high‑speed data for a set validity period. For example, the “Unlimited 2 GB/day – 1 Day” plan gives 2 GB of high‑speed data for a single day, and the “Unlimited 1 GB/day – 7 Days” plan gives 1 GB per day for seven days. If a traveler needs more data, they could purchase a larger plan such as the 100 GB – 30 Days bundle, which still operates as a fixed‑data plan with no truly unlimited data.