But if you are in a remote location with no WiFi available then you are SOL. It has happened to me, and I have to drive somewhere that I can access WiFi, since the plus controller has no mobile/cell data connectivity. It is a big flaw in the logic of the designers of the DJI system.
However they are not alone, since the Adobe Creative Cloud apps also require a working Internet connection to verify your subscription is still valid. Sheesh. They can't imagine there are people in remote places where there is no Internet. I was unable to use Lightroom Classic on my laptop while at a 4-day music festival to import shots from my memory card and work on culling, rating and tagging them until after I got home. Major bummer.