Hi, glad to share GK525 MK903IV TV Dongle latest firmware, please check below information:
Download link: GK525 MK903IV RK3188 TVBOX Firmware
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.