The final major update was v6.7220, which brought the system to Android 9 (Pie). However, official support for software downloads in many Asia Pacific countries (like Thailand and Australia) officially ended on September 28, 2023 .
Note: Always back up your calibration settings before updating firmware. Sony does not allow version rollback on the 43W800C due to efuse write protection on the MediaTek chip. firmware sony 43w800c
If TV shows (corrupted boot/kernel):