The Mobile Client Detection Plugin can overload platform-specific themes or templates - and it provides query_vars platform & browser.
For some reason the Android detection looks for OS versions 1.x and 2.x and determines it to be a phone, and uses 3.x and 4.x for tablets. This is, of course, entirely wrong.
What's more, I contacted the author many times through various channels, and never had a response. Steer clear of this and use WP Mobile Detect instead.