I finally got to try my one today (in the UK)
Did one flight on auto WiFi and the other two on 5ghz chn165
Second flight delayed "battery too cold". Anyway, after it warmed up range was reduced even further on that but signal when drone was close was better e.g. just overhead.
So for close up flying 5ghz good.
that's not bad 1000mtr .i can't get flying .........weather is terrible . thxto the OP i got around 1000m range today and i didnt do anything to the settings(flying with the controller). flying in the uk over a large empty marsh