I have had my v2+v3.0 on firmware 3.08 and after about 100 flights I've had the app show the same message and realized that when it did that, every time it did that was after I got back home after flying 20mi or more away and was recalibrating the compass next to a big piece of scrap steel. Try recalibrating your phantom in an area at home away from ANYTHING metal and keep cell phones and the transmitter and any other devices 10-20 feet away while calibrating and you should be fine. Also, never hurts to power cycle everything including backing out of the vision app and restarting the app too. Cheers, Casey
I accidentally posted in this forum as my bird is the v2+ v3 as well. I downloaded an iOS app to measure background magnetic field intensity and I'll measure tonight. But you're probably right as I was somewhat near my driveway gate with metal as well as its electric motor. The iPhone was well away though.