Well I have downloaded the assistant but have not got a micro usb on the controller and I am sure DJI did not want you to open the controller to find one which has been suggested. I am totally confused now so I think I will take the phantom out side and see what happens. I don't think this naza thing is supposed to work on the fc40 as dji never fitted the micro switch to the controller. What do you think?????????????????? :?: :?: