I got a Korea SIM card. How can I activate?
In the package, you can easily find the way how to activate in the manual.
Here, you can also find the method.
Simple and easy.
Gold : No activation required
Blue Plus : Passport Registration (https://www.krsim.net/reg)
eSIM SKY : Passport Registration (https://www.uplus.co.kr/ent/glob_2/inbom/RegRinDataUsimE.hpi)