data koreaKorean eSim. Pros. Cons. No need to insert any physical SIM card into your phone. Can drain your phone battery the more you use your data. Can easily top up data if you run out. Much cheaper than roaming. Comes with a local phoneGDP (current US$) - Korea, Rep. from The World Bank: Data. Free and open access to global development data. Free and open access to global development data. Data. HOME.