Hi guys, I'm new to this, but bought 2 crashed phantom 2 vision plus units to rebuild. Got the first going and it flys great. However on the DJI app on the iphone does not show the altitude, distance and speed. I've fitted new cables to the gimbal and changed the flight controller, loaded the latest firmware, reloaded the app, but it's still the same. On the screen it says N/A. not sure whether I need to download something else. Any clues to get this problem sorted would be much appreciated.