Phantom 3 4K can’t connect to RC (Newbie)

Drone newbie: recently acquired what appears to be a Phantom 3 4K, model W325. The RC is a model GL358wB. I go through the startup sequence, and eventually the status light on the drone the linking light glows green as does the status light on the RC. Yet the DGI go 4 app displays aircraft disconnected. Can’t figure this one out.

My guess is that the GO 4 app will not work with the Phantom 3 4K. The required app is not available from Android or iPhone stores but only from dji…. which I could only find by googling for it outside of the dji website. Here is the link: