Many users reported a faster and more reliable UI after upgrading to 5.1.1.
Upgrading a Rockchip device is not as simple as a standard phone update and requires specific tools: rk3188 android 5.1 firmware
A complete visual overhaul of the user interface for a cleaner, more modern look. Many users reported a faster and more reliable
Updating to Android 5.1 Lollipop provides several notable improvements over the older KitKat or Jelly Bean versions: rk3188 android 5.1 firmware
Some older apps require at least Android 5.0 or 5.1 to function, extending the life of your device as a basic media player or car stereo. Essential Requirements for Flashing