all the things I loved from my trips to seoul! (will update on busan)
Expensive but reliable: https://www.lguplus.com/ib-roaming/pc/eng
TIP: don’t exchange at the airport (they have the worse, but just a bit if you need)
→ Best to use ATM whenever needed, you don’t need a lot besides street food + transportation
Recommeded by a friend to use a debit card with free ATM withdraws!