Some air travelers in South Korea can now use their mobile phones to check-in for international flights.

Korean Air and Asiana Airlines said on Jan. 28 that they will launch mobile check-in services in cooperation with SK Telecom.

The services are limited to SK Telecom users flying with either of the two carriers. Using a mobile Internet connection on their phone, travelers can choose their seats and check-in by inputting their reservation number and residence registration number.

Upon arriving at Incheon International Airport, they can issue their boarding pass using self-check-in machines by inputting a barcode downloaded to their phone and their passport number. Luggage must be checked at a separate counter.

Asiana will launch the service on Feb. 5. Korean Air has not yet decided on a definite launch date but is looking to begin the service soon.