Based on device lifecycle:
Mi TV 4A 43" Stable Android 9 Update Review - Its Finally Here firmware update on xiaomi mi tv 4a pro 43 work
: Format a USB key to FAT32 . Place the downloaded zip file directly into the root folder (do not unzip it). Enter Recovery Mode : Unplug the TV from the power outlet. Plug the USB drive into the upper USB port (USB 2.0). Based on device lifecycle: Mi TV 4A 43"