The checking in was made possible using a passenger's mobile phone or PDA. And the check-in feature may be accessed by keying in a website on the mobile phone's browser or by downloading a dedicated application.
At the end of the mobile check-in process, some airlines send a mobile boarding pass to a passenger's mobile device, which can be scanned at the airport during security checks and boarding. However, others send an electronic confirmation with a barcode that can be presented to the staff at check-in or scanned at the kiosks to continue the check-in process.