I'll second that. With Android, you have to shut down the DJI Go, AND Force Close the DJI Go app also. Doing just the shutdown of DJI Go is not good enough. It will sort of work if you only do the shutdown, but Litchi will not behave correctly unless you force close DJI Go through the application manager too.Silly thought, but one that caught me out for a while - do you have a firewall (such as mobiwol) switched on? Other than that, forgetting to switch to F mode and not killing the DJI app are my biggest bugbears..