I know when I had a Hub2, on my Wi-Fi options they had 2 separately being 2.4GHz and 5GHz as opposed to now where the hub3 is supposed to speak with the device and auto manage which is better for your device wherever you are in range.
Try speaking with VM and see if they can do the same. That way you could connect the devices that require 2.4GHz to that Wi-Fi and the ones that work on 5GHz to that one.
I suspect the issue is the coding between our android 8.0 devices and the hub where it can't switch between 2.4GHz and 5GHz using it's auto swapping.
You can speak to VM and maybe get them to split the 2.4Ghz and 5GHz bands but it is usually quicker and easier to do it yourself by going to the Advanced Wireless settings in the hub GUI and giving each band a different name, just like on the older Superhub 2.
At least one person on this thread is also having success with using a guest network for the problem devices. Instructions for setting up a guest network are here:
Same issues here. All other devices in house connect fine. The only ones that have a problem are 2 Samsung Galaxy 7 edge phones. Followed the advice by disconnecting and reconnecting and also 'Forget network' and rejoin but issue remains.
Have given up with VM, 4g connection is more stable.
Dont kniw if anyone else is the same as not getting a lot of post messages through but my problem with all 4 S7's appears to be s9rted. No issues in the last 4days well except last night whilst streaming netflix on my phone teice but normal day to day working fine.