Jetpac does not provide a truly unlimited high‑speed data eSIM for South Korea. All of the plans that carry “Unlimited” in their name actually allot 3 GB per day, and once that threshold is reached the speed reduces to 1024 kbps. Because of that, the plans are limited rather than unlimited.
Jetpac does offer fixed‑data plans that may suit travelers who need large amounts of data. For instance, a 30 GB plan is valid for 30 days at $34.99 USD, and a 40 GB plan is valid for 30 days at $44.99 USD. These options can be more cost‑effective for heavy data users.