There seems to have been some issues using the LG-G4 with the DJI Go App and getting the error message "Unfortunately UI has stopped". I had this happening to me specifically when my phone asked me to select either DJI Go or DJI Go 4 when I booted up my controller and plugged in my phone. It seems that for some reason, the LG does not like having both the DJI Go apps loaded on the same device and proptly crashes when you try to initiate one or the other. I removed DJI Go from my LG-G4, and it seems to connect flawlessly to DJI Go 4. Maybe someone else has already discovered this, but I thought I'd throw a quick message up for those who want to use their LG-G4.