You download the firmware to your PC install the assistant and the Windows driver and connect to the port on the Phantom via then mini USB port ( not the camera port) and in the assist it should tell you to upgrade and follow the instructions. Also their is an upgrade tab if you go there it will show the line items and will say to click on them to upgrade. You'll get flashing lights and a beep then it will tell yountompower off and back on. Then the line items will shown the latest firmware and tell you it was upgraded. There are videos on you tube that show the steps and are easy to follow too.