If your 50EP660 currently works without major issues (no random reboots, Wi-Fi stable), . If you experience the 5GHz dropout or HDMI handshake failures, proceed.
Take note of the build reference (e.g., V8-R51MTO1-LF1V... ). The characters following "V8" indicate your exact platform variant. Step 2: Choose Your Update Method Method A: Automatic Network Update (FOTA) firmware tcl 50ep660 upd
If the downloaded file is a compressed archive (e.g., Update.zip ), extract it. If your 50EP660 currently works without major issues