If the device is only compatible with 24ghz then it wont try to connect to 5ghz. If youre willing to try something untested it appears that the entire 24 and 5ghz bands can be disable from the web interface.
Netgear Orbi Rbk853 Wi Fi System 802 11a B G N Ac 802 11
How to turn off 2 4 ghz orbi. And yet theres plenty of room for improvementwhich is why you should consider disabling the old 24ghz band on your homes wi fi network and using the newer faster less crowded 5ghz band exclusively. Both client facing frequency bands of the orbi 24 ghz and 5 ghz emit signals using the same ssid name. Usually if the client device supports dual band it will try to connect first to the 5 ghz band because its faster. In less than twenty years wi fi has gone from an amazing and expensive luxury to an assumed inclusion in every device you own. Technology is an odd duck. Devices can select automatically to use either the 5 ghz band or the 24 ghz band.
Normally lte should not be faster than 24 ghz wifi. The issue is that the orbi automatically assigns the same ssid to both the 24 and the 5 ghz bands thus confusing a device like the ambient weather osprey ws 2902 which has only 24 ghz connectivity. You have to log into the router and navigate to advanced advanced settings wireless settings. If you are going to use orbi you should turn all other wifi aps off and use only orbi. You may run into same problem with other mesh systems based on the fact that they do single ssid names for both 24ghz and 5ghz radios. You have to log into the router and navigate to advanced advanced settings wireless settings.
The orbi is designed only to run on a single ssid between 24 and 5ghz. Disabling the 24ghz or 5ghz channel should be as easy as going into wifi settings and checkingunchecking a box. Thats why turning off the orbis 5 ghz ssid broadcast as well as reducing that radios power to the minimum 25 thus letting the 24 ghz radio. This seems like an interface shortcoming that netgearorbi should address with an update. Turn the 5ghz radio power on the orbi router down from 100 to 25 on the 5ghz radio and see if you can get the device connected. Then see if the device will connect.
If youre willing to try something untested it appears that the entire 24 and 5ghz bands can be disable from the web interface. Yeah its also possible that ng disablesdisallows this ability on purpose bc 24ghz could be required for orbisatellites to function properly. If youre fearless and still want to forcefully disable 24ghz radio on the orbi via telnet go ahead and try it. Try setting the orbi security mode to disable temporarily. Orbi wifi operates at a link speed of either 200 or 400 mbps on 24 ghz depending on whether the bandwidth is at 20 or 40 mhz.