I have a major problem with Wi-Fi signal not reaching upstairs. I've had VM broadband previously with the first SuperHub and it's always been excellent however since the install of this new hub 3 it's so poor, and I've gone for the package for 10+ devices.
Please can you help, my kids are giving me daily headaches?!
the first superhub was notoriously bad for wireless so I'm a little surprised to hear that your Hub 3 is worse. Is the new hub in the same place as the old one and not near a TV, fish tank or other furniture that could be blocking the signal. It is possible the new hub is using a different wireless channel than the old one and finding a better channel might help VM have a guide on how to change channels here.
One thing that is different with the Hub 3 is that it is dual band (2.4Ghz & 5Ghz at the same time) whereas with the original Superhub you had to choose one band or the other in the config. The Hub 3 (unlike the SH2) ships with the same SSID for both bands, which can confuse some devices. If you go into the hub's advanced settings you can rename the wireless SSIDs so that the 2.4Ghz & 5Ghz bands have different names.
One option might be power line adapters. These use the electrical wiring in your house to create a wired network without the need for long cables. They are rarely as fast as the manufacturer's claim but are a lot more stable and less prone to interference than wireless. Some provide just wired connections and others come with additional wireless built in to allow you to create a wireless access point in parts of the house where the wireless signal is poor. Some powerline adapter reviews here: http://www.pcadvisor.co.uk/test-centre/network-wifi/20-best-powerline-adapters-2016-uk-3490638/
Another option to improve your wireless is with a third party router. It is what I and many other customers do and it can make a huge difference.
Disclaimer - I don't work for Virgin Media. I'm just another VM user trying to help out so my answers may be wrong If my answer solves your problem please mark it as helpful as it may help others My setup: Vivid 200 Optical fibre with Superhub 2 in modem mode connected to a Netgear R7000 router. Telewest/VM user since 2001.