Download Android Oreo 8.1 firmware for X96S 2GB RAM Wireless Display Dongle from here or here. Download the firmware for 4GB RAM 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: X96S_S905Y2_2G_190223
Archive file size: 914 MB
Model: X96S Wireless Display Dongle 2GB RAM version
Platform: AMLogic S905Y2
System: Android verson 8.1.0
Build number: p281-userdebug 8.1.0 OPM1.171019.011 root 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.