Netgear D6400 // Will not connect to Plusnet UK fibre AND forced to use old firmware

[rich1233211]

My orbi has been great, however I am experiencing frequent mini dropouts in signal. My phone and xbox drop for a few seconds and reconnect automatically. I have discovered that it frequently connects to the router or a satelite farther than the nearest device available. Is there a way to force a device to stick to a certain router/satelite? I am certain this will solve my problems but also make or break the system for me. I also tried to enable 5ghz ssid to be separate via telnet but it is not working. I am running firmware 2.1.14.16

[FURRYe38]

Modem Combo Units:
Couple of options,
1. Configure the modem for transparent bridge mode. Then use the Orbi router in router mode. You'll need to contact the ISP for help and information in regards to the modem being bridged correctly.
2. If you can't bridge the modem, disable ALL wifi radios on the modem, configure the modems DMZ for the IP address the Orbi router gets from the modem. Then you can use the Orbi router in Router mode.
3. Or disable all wifi radios on the modem and connect the Orbi router to the modem, LAN to LAN and configure AP mode on the Orbi router.