Use the KIVI Software Support Page where you can enter your TV's serial number (found on the back of the device) to receive the exact, validated firmware for your specific model.
If your model isn't listed or you have trouble with the serial number, you can Submit a Service Request directly to KIVI. Common Firmware Installation Steps Download RT2861V09 3840x2160 16G Kivi 49UP50GU part08 rar
If you successfully download the complete set of files (all parts must be present to extract), the typical update procedure via USB is: Use the KIVI Software Support Page where you