eSIMCard does not provide a truly unlimited data eSIM for South Korea. The plans that carry the word “Unlimited” in their name actually have a fixed data allowance of 1GB/day or 2GB/day, and once that amount is used the speed is reduced to 512kbps or 2000kbps. Therefore, these plans are not unlimited in the sense of providing high‑speed data without limits.
If a traveler needs a larger, fixed data allowance, eSIMCard offers several high‑capacity plans. For example, a 100GB eSIM Data plan for 180 days for South Korea costs $65.41 USD, and a 100GB eSIM Data plan for 30 days for Asia costs $109.25 USD. These fixed data plans give a substantial amount of high‑speed data that does not have a daily cap, though the data must be used within the validity period. Choosing a fixed data plan can be more cost‑effective unless the user is an extremely heavy data consumer.