<p>By default, Moodle can detect devices of the type default (desktop PCs, laptops, etc), mobile (phones and small hand held devices), tablet (iPads, Android tablets) and legacy (Internet Explorer 6 users).  The theme selector can be used to apply separate themes to all of these.  This setting allows regular expressions that allow the detection of extra device types (these take precedence over the default types).</p>
<p>For example, you could enter the regular expression '/(MIDP-1.0|Maemo|Windows CE)/' to detect some commonly used feature phones add the return value 'featurephone'.  This adds 'featurephone' on the theme selector that would allow you to add a theme that would be used on these devices.  Other phones would still use the theme selected for the mobile device type.</p>