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What is the biggest difference between SMS check-in and mobile phone check-in

1, SMS check-in: It means that passengers check in by sending and receiving SMS. The first phase of SMS check-in service is only applicable to single adult passengers who handle non-transit and non-code domestic flights of China Southern Airlines.

2. Mobile phone check-in means that passengers enter relevant information according to the system prompts through the official micro-signal or official APP of China Southern Airlines and go through the check-in procedures.