If you are convinced that custom is better, follow this workflow:
Several custom ROMs are available for devices powered by the Allwinner H616, each with its unique features and advantages: allwinner h616 custom rom better
Beyond raw performance, custom ROMs offer a tailored user experience. Many users purchase H616 TV boxes hoping for a clean, Google-certified Android TV experience, only to find a generic, mobile-centric Android interface on their television. Custom ROMs can rectify this by offering true Android TV Leanback interfaces or highly customized launchers that transform the device into a sleek media hub. If you are convinced that custom is better,
Unlike stock firmware that forces Android, custom ROMs for H616 can open the door to other OSes: Google-certified Android TV experience