RedSim eSIM Data Plans for South Korea

RedSim does not provide a truly unlimited data eSIM for South Korea. The plans that carry the “Unlimited” label give a maximum of 3 GB of 5G data per day; after that daily limit is reached the speed is throttled to 1 Mbps.

The only way to guarantee a fixed amount of high‑speed data is to choose a fixed‑data plan. For example, the South Korea 50GB 30 days plan delivers 50 GB of 5G data for a full month, and the South Korea 20GB 30 days plan provides 20 GB of 5G data for 30 days. These bundles can be more cost‑effective, especially for travelers who need reliable, high‑speed connectivity.

RedSim does not provide an eSIM plan for South Korea that includes a phone number or SMS capability. The provider offers only data‑only eSIMs for that country. Travelers who rely on voice or text can use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection, but they should verify that these services are accessible in South Korea before purchasing, as some destinations may block or restrict specific apps or VoIP services.

RedSim offers 12 single‑country data plans and 17 multi‑country data plans for South Korea. The single‑country collection includes both fixed‑data‑cap plans, where a set amount of data is allotted for the entire validity period, and daily‑data‑cap plans, which reset a daily data allowance during the validity period. The multi‑country offers similarly mix fixed and daily data caps across the 17 available options. Across the full range, prices vary from $2.20 to $63.80, data caps span 1 GB to 50 GB, and validity lengths range from 3 to 30 days.