Hi
This is not so complicated
All You need to do is to select a right template for a device. Egzample, iphone for iphone etc. This should be set like this by default. Than the only information You need to know is that this mobile templates are using differnt module positions than regular one. You can use just "mobile_top" and "mobile_bottom", so basically You can select what module should be visible over and under the content. That's all