I flew today. Got in the air and a little ways away when the little screen turned a blue shading. I saw that I was in a NFZ after I landed and looked at my flight. The only thing I could figure is Trump was coming to town so they must have made the whole Atlanta Metro area a NFZ. I accept that. During that flight, I could still see through the camera. All of a sudden, I got an error message saying that the RC had disconnected and the screen on my phone froze. I could see my Mavic, so I flew it over to me and landed. My question is, had I been out of sight and that happened, how would one decide which way to go to get back home? I know, VLOS. But it could happen. Just pretend.