No. Simbye does not provide a truly unlimited high‑speed eSIM plan for South Korea. The plans that contain “Unlimited” in their names give a fixed allowance of 2 GB per day for the duration of the validity period; after that amount, speed is throttled to 1000 kbps. Travelers who need more data can choose from fixed‑data plans such as the 20 GB 30‑day plan, which allows 20 GB of high‑speed data for 30 days, or the larger 100 GB or 50 GB plans that are valid for 30 days. These fixed‑data options can be more cost‑effective for most users unless they expect to consume data beyond the stipulated limits.