I have had the same problem ever since I add ADS B... I called I have updated the software andreplaced the usb cable I have booted adsb after I was in the air bottom line, within a minute of connecting adsb to the IFLY 700 it freezes4 calls and not been fling as much as I was I leave the ADS B disconnected and disgusted Mine is the SKYRADAR D and a very expensive floor ornament. I also tried a new 4 gig sd card with new data. Freezes like a deer in the headlights