Feature phone browsers

From MobileDesign

Feature phone browsers generally have to run in a low memory environment. To get around this limitation (and to increase speed and decrease bandwidth), they are often implemented as thin client/proxy browsers. The page is rendered on the server and the result is sent to the phone to be displayed. Javascript support is minimal and requires a roundtrip to the server.

Feature phone browsers are usually architected to be used primarily as portals. The user is presented with a small, pre-populated list of web sites to which the user can add their own favorite destinations. (See the Opera Mini's speed dial interface for an example.) This works well because, particularly on mobile devices, most users only visit a limited number of sites on a regular basis.