Whether the mobile boarding pass page can be saved depends on the capability of the smartphone you use. In general, most smartphones are equipped with the function for taking a screen shot. For example, to take a screen shot under iPhone, you can hold down the "Home" button (at the bottom of the screen) and then hit the "power/sleep" button (at the top right hand side of the phone). Your screen shot will be available offline in the camera roll section. You can then transfer it to any devices and get it printed out.
However, we advise passengers to check whether their companies will accept this format first before deciding to receive a mobile boarding pass. If it is not accepted to declare a business trip or make any travel claim such as for insurance, passengers are encouraged to use the Self Print Boarding Pass while checking in online.