To update the software on your , you can check for official wireless updates directly through the tablet's settings. Standard Wireless Update

Software updates, often called "firmware updates," serve several critical purposes. First, they provide that protect your personal data from new vulnerabilities. Second, they often include system optimizations that can make your tablet feel faster and extend battery life. Finally, updates fix known bugs that might cause apps to crash or the Wi-Fi to drop. How to Check for Updates Automatically (OTA)

For 99% of DOOGEE U9 users, is all you need. Check once a month, ensure you are on a good Wi-Fi connection, be patient during the reboot, and always keep your battery charged.

If your device is not finding updates wirelessly or you need to perform a manual flash, you can use the official firmware: