Orginally had issues with losing connection at about 33-35 feet from controllor. Updated Go4 app, no more connection issues, lost my video feec! So, just loaded the new softwear into Mavic Air & Controller, both updated with no issues. Uninstalled and reinsralled DJI Go4. STILL, no video from camera! Black screen! Running on a Galaxy Tab A, 7", running Android version 5.1.1 through a USB to micro-mini. No changes from how i've used it since new, except for the app and softwear. Any other thoughts???