eSIMCard does not provide a genuinely unlimited high‑speed data plan for South Korea. All of the plans that carry “Unlimited” in their name are limited to a fixed daily data allowance of 1 GB or 2 GB; after the limit is reached the connection speed is reduced, usually to 384 kbps. Because of these capped limits, the plans are not truly unlimited.
If a user needs more data for a trip to South Korea, eSIMCard offers fixed‑data alternatives. For example, a 50 GB plan is available for 10 days and a 100 GB plan can be purchased for up to 180 days. These larger‑volume options can be more cost‑effective for travelers who require a substantial amount of high‑speed data without the throttling that occurs on the “Unlimited” named plans.