The Q-Code system( https://qcode.kdca.go.kr/qco/index.do?lang=en ), Quarantine Information Pre-entry and K-ETA, Korea Electronic Travel Authorization by Korean Government requires Korean local Phone Number. 

You can find out how to know your Korean local phone number after the order of Korea SIM here in https://krsim.net .

■ Korea eSIM SKY

    1) Receive a voucher email with a QR code and a Korean phone number (in a few minutes).

    2) Contact to Q-Code system ( https://qcode.kdca.go.kr/qco/index.do?lang=en  ) and input your information with the above phone number.

    3) Boarding a plane and landing at any International Airport in Korea.

    4) Connecting Airport Wi-Fi (SSID: Airport Wi-Fi)

    5) Activate it by Online. ( https://krsim.net/esimact )

    6) Pass the immigration and Enter South Korea.

■ Korea SIM Blue Plus    * Only with foreign passport (Not With Korean passport)

    1) Receive confirmation email (in a few minutes) 

    2) Ask the phone number for you through the messenger on krsim.net with your order number on one day before the date 

        you designate as a delivery pick up. (If it is weekend or holiday, on the prior working day) We will let you know.

    3) Contact to Q-Code system ( https://qcode.kdca.go.kr/qco/index.do?lang=en  ) and input your information.

    4) Boarding a plane and landing at any International Airport in Korea.

    5) Pass the immigration and Enter South Korea. 

    6) Collect the Korea SIM Blue Plus, Register it by online ( https://krsim.net/reg ) you have delivered.