Flash Android TV 9 Pie S912 (Tanix TX9s)

1. Download DaivietPDA's Android TV 9 ROM Download
2. Download Amlogic Burning Tool v2.2.0 Download
3. Extract Amlogic Burning Tool v2.2.0
4. Install Amlogic Burning Tool v2.2.0
5. Launch Amlogic Burning Tool v2.2.0
6. Go to File > Import Image > Browse to and select DaivietPDA's Android TV ROM .img file
7. Click the Start button in the top right corner of the application
8. Connect the S912 TV box to the PC via USB cable
9. Press the reset button (sometimes hidden inside the AV port)
10. Wait for the ROM to copy over to the device
11. Once the process completes (100%: Burning Successfully) click the Stop button
12. Disconnect the TV box from the PC USB
13. Connect the TV box to an HDMI display and power it on
14. Enjoy a clean and fast Android TV experience on your S912 device

Source: https://daivietpda.com/2020/07/rom-atv9-android-9-0-cho-amlogic-s912/