Download Android Pie 9.0 firmware for X96 Air P4 ROM 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: X96Air_P4_20191121
Archive file size: 823 MB
Model: X96 Air P4 TV Box
Platform: AMLogic S905x3
System: Android version 9.0
Build number: franklin-userdebug 9 PPR1.180610.011 20191121 test-keys
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.