Push delivery summary - filter results by device?

[mbkass]

Using the delivery summary OOTB report within my push "folder", i can choose a date range and generate results for all campaign or delivery metrics of my choice. However, for push, I would like to see a subset of results by Android vs iOS (e.g. sends, opens, etc). There is a "device" metric but it doesnt seem to do this. Any advice on how to do that?