Is there a way to segment if a user is on desktop / mobile / tablet?

[EmPaulin]

there is device carrier, count, model, os, most recent locale. 

I am trying web browser (is not blank) 

any other ideas? 

[eakinsey]

There isn't a direct attribute for device type (desktop, mobile, tablet), but you could infer this information from the 'Last Known Device' attribute.

For example, if the 'Last Known Device' is an iPhone, you can infer that the user is on a mobile device. Similarly, if the 'Last Known Device' is a Mac, you can infer that the user is on a desktop.