I have used 4 Responsive theme.
All of them not show karma (mobile) .
Please recommend.
then you need to post in the themes support topic and ask how to enable karma to show on the responsive theme.
You can easily do it with some CSS I think.. All you need is changing CSS code in media queries.
Did you try Curve (default theme) + Responsive Curve (modification) combo ? If issue exist in there as well, I'll deploy a fix to it. Afaik some themes using the modification as base (tho I have to be sure).
I've run into this; I really like my theme but would also like karma in mobile.