Flashing firmware is a high-risk operation that can potentially void your warranty or make the device unusable if done incorrectly. Always back up your data before proceeding. Manual USB Update Method
Flashing a wrong region file can disable DVB-T/T2 tuners (over-the-air channels), break Netflix Widevine L1 DRM (reducing Netflix to 480p instead of 4K), or kill Google Assistant functionality. A2zrom.com Tcl Tv