3. Unzip Firmware

❶ Open RKDevTool\RKDevTool_Release\RKDevTool.exe

❷ Click Advanced Function -> Firmware, select update.img. Click Unpack to unzip.

The unzip files will be generated in RKDevTool\RKDevTool_Release\Output\Android and \RKDevTool\RKDevTool_Release\Output\Android\Image