Tech-focused Telegram channels and YouTube tutorials often provide direct links in their descriptions.
Part 4 of a multi-part .rar archive. You must download all parts (e.g., part1, part2, part3, etc.) and place them in the same folder to extract the final .bin firmware file correctly. Sources for TP.MS338.PB801 Download MS338 PB801 1366x768 China M90 Remote part4 rar
Android LED TV motherboard . This motherboard is a common "combo board" used in various local-brand smart TVs to provide UHD, Wi-Fi, and Android capabilities. Firmware Details TP.MS338.PB801 (MStar chipset). Download MS338 PB801 1366x768 China M90 Remote part4 rar
Sites like Kazmi Elecom and Lab-One Forum frequently host free firmware downloads for this board. Download MS338 PB801 1366x768 China M90 Remote part4 rar