First, download the firmware pack
Then, format your micro SD card, unzip the firmware pack to the root directory of your micro SD card.
Next, insert the micro SD card into the tablet and hold the volume “+” button and power button
at the same time for a few seconds until the tablet power up.
There will be four selections appear on the screen, choose “upgrade system from SD card” by volume control and press the power button to confirm.
After enter the new menu, press volume + button to confirm updating.
After waiting for 5-10minutes, the updating procedure automatically completed. It will
take a longer time to start the tablet after updating.
Note: Please connect the tablet to the charger during updating in case of interruption of power supply.