Typically Android 4.4, with some variants running 5.1 or 7.1.
Insert the USB into the TV's USB port while it is powered off. Download CV628H B42 SAMSUNG REMOTE 1366 768 MIRROR zip
High compatibility with third-party remotes (like Samsung or LG) through specific firmware modifications. Download & Firmware Details Typically Android 4
Power on the TV. The update usually starts automatically, indicated by a blinking standby LED or a progress bar. Do not power off during this process to avoid "bricking" the motherboard. Typically Android 4.4
If the screen appears upside down or mirrored after installation, this can often be toggled in the Service Menu (usually accessed by pressing Source/Input + 2580 or Menu + 1147 ) under "Panel Settings". How to Install