How do I lock onto the 5G network with the new white Telus Hub router?

[wireless]

The new white Tellus wifi HUB router will automatically switch your phone from 5G down to 2.4G if there's a slight dip in signal strength, but then won't switch you back again when you go back to where the 5G signal is strong.
How do I lock it so my phone will only connect using 5G?
Note: I can't disable the 2.4 G band on the router as I need it for other connections in the network.


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