If your tablet has no problem, upgrading is not recommended.
Password is geekbuying.com
Following the steps to upgrade your tablet:
1, Install the upgrade tool
2, Open the tool and choose the right files to upgrade
3, Shutdown the tablet
4, Press Volume + and connect the tablet to computer at the same time, wait 5 sec, prompts to install driver
5, Upgrade the tablet
Upgrade time has some differences between different computers, usually in 3 minutes can be upgraded successfully, unplug the charger and USB data cable after a successful upgrade, press the power button 8 seconds, the machine will reboot into the system. First upgrade boot, requires about 2-3 minute into the system, then check the version number of tablet, if has changed, indicating a successful upgrade.