Installation of MobileFrontend extension (works on Pl@ntuse)
Add the following code at the bottom of your LocalSettings.php:
To see mobileFrontend of the page you can add ?useformat=mobile at the end of the url of click on "Mobile View" at the end of the page.
For mobile autodetection add in LocalSettings.php :
$wgMFAutodetectMobileView = true;
Access to the page on a mobile will displays the mobile view.