Fold the information & filter by default in product & category page for mobile device.

I recommend an independent mobile theme which can load faster and friendly to customers. For mobile. the theme should be very simple and can load fast. Now the pc theme load slowly in mobile,becuase it load too many css ,js and other media. Customer usually won't wait for that long time via mobile. Although many users now user wifi, still quite a lot users use GPRS mobile network to surf the web.