eSIM showdown: Airalo vs Klook vs KT Roaming for Korea data

I tested three eSIM options across two Korea trips. Airalo (Discover+ Asia plan): 3GB for 30 days, $11 USD — decent at 15-30 Mbps, dropped in rural Jeju. Klook Korea eSIM: 2GB/day unlimited for 5 days, $18 USD — fastest speeds (40-60 Mbps), SK Telecom network. KT Roaming eSIM (airport kiosk): 5 days unlimited for ₩27,500 — solid coverage, most expensive. Verdict: Klook for best coverage, Airalo for budget. All three worked for maps and messaging. Tip: activate your eSIM before boarding.