Download Android Oreo 8.1 firmware for Tanix TX5 Max TV Box from here or here. Download previous firmware from here. Download Amlogic USB Burning Tool v2.1.6 from here or download Amlogic Burn_Card_Maker v2.0.2 from here.
Archive name: JY-TX5Max-NavigationBar-20190221
Archive file size: 745 MB
Model: Tanix TX5 Max TV Box
Platform: AMLogic S905x2
System: Android verson 8.1.0
• Add lower and upper Android navigation bars.
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.