If your Seoul Climate Card is rejected at a subway gate, check the pass type and validity, current service area, missed exit taps, NFC settings, and card-reading problems before replacing it.
Need to get from Seoul to Busan late at night? Check KTX first, then post-midnight express buses; flights are limited by Gimpo Airport’s overnight curfew.
Tourists can use Seoul Bike without Korean mobile verification by choosing the Foreigner route. This guide explains passes, foreign-card payment, QR rental, rental times, and common app problems.