I have this problem on the last upgrade. DJI GO app on my Samsung S6 keeps getting "disconnected." It connects really quickly then disconnects shortly thereafter. I did the RC upgrade while it was connected but I think the app disconnected during the upgrade. The upgrade is downloaded but when I try to "upgrade" it says "failed" because I am "disconnected." I have tried everything including different cables, RC reset procedure, set USB settings for every possible setting, etc. Nothing has worked. RC just has a solid blue LED and app is disconnected. I can get the app to connect when I set the USB to "media share" but it quickly disconnects. Advice please - thanks!