As of December 2017 this segment represents ~2% of the mobile browsers and ~1% of all browsers (across all device types). This segment is typically a lot larger in developing countries like India and Africa.
The mobile_light segment is defined by the following criteria:
- Screen less than 2 inches
- Primary input method is trackball/joystick/T9 keyboard
- Browser supports the mobile_light segment requirements
The mobile_light segment supports the following features:
- Very limited CSS support
To develop successfully for this segment you have to keep it very, very simple. You have to build on top of a mobile-first designed markup and it is more a matter of making it usable than actually applying a specific design. Some phones doesn't even have a color display. With that said, you can create a fully functional website even for these phones.