Hi, glad to shareMK809IV TV dongle latest firmware, please check below information:

Download link: MK809IV RK3188 2G 8G TVBOX update

Password: geekbuying.com

Flash method:

Flash tool: Rockchip BatchTool
1, Open the “RKBatchTool.exe” in the BatchTool file, on the top, you will see a “FW Path”, click the button on the right side, and select the “update.img” file in firmware file.
2, Connect the box to the computer with USB cable, press the recover button and then power on, remove your hand from the recover button until it connect successfully that shows in  “Connected Devices”
3, Click “Upgrate” to start flash.