How to check if the Phone is PORTRAIT or LANDSCAPE?

I know we can check the resolution of the tablet if 'TABLET_PORTRAIT' or 'TABLET_LANDSCAPE' by using `a!isPageWidth({ "TABLET_LANDSCAPE" })`.

But You know there is no 'PHONE_LANDSCAPE' in Appian, how to do the same thing with the Phone? 

Or can we get page width and determine what it is?

Is there a way to do this?

Thanks in advance!