How to target mobile devices

2 ways:
- the usual way is to use CSS to target mobile devices, this way you will serve (send) the exact same HTML to all clients
the be able to apply different CSS you need to use "CSS  media queries"
e.g. Read more here:
http://www.htmlgoodies.com/beyond/css/targeting-specific-devices-in-your-style-sheets.html
www.htmlgoodies.com/beyond/css/targeting-specific-devices-in-your-style-sheets.html

- you can enable mobile templates in FLEXIcontent component parameters
then in component / category / TYPE/ item  forms,   you will be able to select a different FLEXIcontent template, thus be able to create different HTML for mobile/tablet devices

BUT you will still need to use  "CSS  media queries"  to target different mobile cases