MobineX does not provide a truly unlimited high‑speed data eSIM for South Korea. Each plan that is labeled “Unlimited” actually has a fixed data cap, ranging from 1 GB to 65 GB, and the speed is reduced after the cap is reached— for example the 1 GB plan drops to 128 kbps and the 5 GB plan to 1024 kbps. Plans with larger caps such as 28 GB, 42 GB, 52 GB, 65 GB, or 65 GB for 10 or 15 days are LTE‑based and do not specify a throttling speed, but they still limit the amount of high‑speed data that can be used.
For travelers needing extensive data, mobineX offers fixed‑data alternatives such as a 52 GB plan valid for 7 days, a 65 GB plan valid for 10 days, or a 100 GB plan valid for 60 days. These options can be more cost‑effective for heavy data users compared to the “Unlimited” tiers whose caps and post‑limit speeds gradually reduce usability.