: Unlocking your bootloader and flashing custom software will void your warranty and carries the inherent risk of bricking your device.
: The core of the operating system. Devices typically ship with a "downstream" kernel provided by Allwinner, but developers are actively working to mainline the A133, allowing it to run newer, standard Linux kernels. Allwinner A133 Firmware
Finding the exact firmware "report" or image for your device depends on identifying the specific board or manufacturer, as Allwinner A133 is used in many generic tablets. A133 support #207 - linux-sunxi/sunxi-tools - GitHub : Unlocking your bootloader and flashing custom software