🇰🇷 South Korea

Yes. South Korea has excellent eSIM support. All three major carriers — SK Telecom, KT, and LG U+ — support eSIM. GoSIM South Korea eSIMs work on any eSIM-compatible device including iPhone XS and later, Samsung Galaxy S20+, and Google Pixel 3+.

GoSIM South Korea plans connect to SK Telecom, KT, or LG U+ depending on the plan. SK Telecom is South Korea's largest carrier with the most extensive coverage. KT and LG U+ both offer strong nationwide coverage including in Seoul, Busan, and Jeju Island.

For a 7–10 day trip with typical tourist usage — NAVER Maps, KakaoTalk, translation apps, social media — a 5–10 GB plan is comfortable. Seoul's subway has comprehensive WiFi, but above-ground and out-of-city travel benefits from consistent mobile data.

For solo travelers, yes — eSIMs are cheaper, lighter, and don't need to be returned. Pocket WiFi is better for groups sharing one device, but requires picking up and dropping off at the airport, which adds friction at both ends of your trip.

Yes. Seoul Metropolitan Subway has one of the world's most comprehensive underground mobile coverage systems. GoSIM connects to Korean networks that provide full LTE and 5G coverage in nearly all subway stations and tunnels across Lines 1–9 and the AREX airport express.

Yes. Jeju Island is fully covered by all three major Korean carriers at 4G LTE and 5G speeds. GoSIM South Korea plans work across the island including Jeju City, Seogwipo, Hallasan National Park, and the popular coastal areas.

GoSIM South Korea plans range from 1 day to 30 days. Plan duration starts from first activation — when your phone connects to a Korean network — not from purchase date.