Understanding the hardware is crucial for identifying the correct firmware version. : TCL L43S6500 Resolution : 1920 x 1080 (Full HD) Operating System : Android TV 8 Oreo Chassis Number : MT15 System on Chip (SoC) : RealTek RTD2841 Storage : 8GB eMMC Memory How to Update Firmware

TCL does always publish firmware publicly on their global site. Sources: