I was updating the firmware on my Mavic Air when the iPhone died and I had to get a new battery put in the iPhone because the battery literally fully died.
I fired up my App, the drone, and the controller. The controller and drone show green lights as though they are connected together but the camera says disconnected and I am not getting any camera visuals.
When I open the Go 4 app, it doesn't give me the option that there is a firmware update avaialble.

Any suggestions?

Hi, there. Did you try to upgrade it again with DJI Assistant 2? Please try again and keep us updated, thanks for your support.