Mobile Compatible Website Theme

Hi all: I have been reading through the forum here about a mobile solution. I liked what I read here https://premium.wpmudev.org/forums/topic/mobile-website-view-full-site but am not sure if the solution is viable or if there is a better one.

I am currenlty looking for a stand alone theme that is for mobile viewing only. Users will be directed there by QR codes and or browser detection.

Any ideas?

Thanks a lot!

Rob