Hi there - I have a Galaxy S8+ with wifi calling enabled and working pretty much everywhere (office, friends etc) except on my home network where I need it the most (due to bad cellular dead zones around the house). I'm on 2-degrees, and running a 5ghz network via a D-Link DIR-880L router connected to a Netgear DM200 VDSL modem) on BigPipe's VDSL (UFB finally getting installed here next week!).
Can anybody please shed some light on why the router would be somehow blocking wifi calling? Are there any particular ports I should be trying to open, or features to be enabled that I may have overlooked?