Yes I did.So the Orbi is basically functioning as the router? Did you reset the Orbi before entering the Giganet details?
In that case I would change the server speedtest.net is using. Is it using the same test server as when you test it on PC?
EDIT: Wait I misread, when you do the Orbi test on your phone it's most likely testing from the Orbi itself, not the phone, so it still won't rule out if your WiFi is being limited. Have you checked the channel width on 5GHz yet?
Download a WiFi analyser app on your phone then have a look at the 5GHz details there. If it's only 40Mhz wide then that will limit the speeds a fair bit. Ideally the Orbi should be using 80MHz minimum for the best speeds.
Alternative option, have you tried using the router from Giganet and the Orbi in access point mode (if it offers that), and see if that perhaps is any better?
Analyser shows 80 Mhz on 5Ghz.Will try an analyser. Giganet router was the first thing I tried when I changed to FTTP. This was causing too many other issues and swapped over to direct connection after consulting Giganet.
In that case I'm not sure why wireless is on the slow side.Analyser shows 80 Mhz on 5Ghz.