Download Android Oreo 8.1 firmware PC version for MECOOL KM9 TV Box from here or here. Download Android Oreo 8.1 firmware SD card version for MECOOL KM9 TV Box from here or here. Download Amlogic USB Burning Tool v2.1.6 from here or download Amlogic Burn_Card_Maker v2.0.2 from here.
Archive name: MECOOL KM9 20181205 / MECOOL KM9 20181205
Image: MECOOL KM9 20181205.img / MECOOL KM9 20181205.zip
Archive file size: 846 MB / 800 MB
Model: MECOOL KM9 TV Box
Platform: AMLogic S905x2
Build number: Amlogic/u211/u211:8.1.0/OPM1.171019.011/V0828.20181205:userdebug/test-keys
System: Android verson 8.1.0
Caution Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.