eSIMsData does not provide a true unlimited data eSIM for South Korea. The plans marketed with “Unlimited” in the name actually grant a daily high‑speed allowance—either 1GB/day or 2GB/day—and after that allowance the speed drops to a reduced rate (1250 kbps or 2000 kbps).
Travelers who need large amounts of data can choose from fixed data plans instead. Examples include the South Korea Unlimited Plus 30 Days plan, which gives 2GB/day over a 30‑day period, and the South Korea 100GB 30 Days bundle, which supplies a non‑throttled 100GB allowance for the same duration. Fixed plans can be more economical unless a user expects very heavy data usage beyond the allocated high‑speed limits.