Just for the record.... VM (& all other BB providers) provide a service that is guaranteed TO the Hub and what comes out from it on an ethernet cabled device.
They all expressly exclude guaranteeing wifi connections - as it is so influenced by the external environment. Even BT with its glossy ad's saying wifi is “guaranteed”, also charge £10/month for that and say that if it isn’t sorted they will just give you £100 back. VM try and help with swapping the Hub (just in case!) and providing pods etc., but the reality is, that if the Hub wifi doesnt work well for you then you are far better sourcing your own wireless equipment.
You will get help on here on what would be suitable
You should try separating the SSID's of the 2.4 and 5 GHz wifi bands first as it will help. Follow this protocol its not difficult - I am a pensioner too
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First go into the Hub3 settings. Type in
http://192.168.0.1 into your web browser’s url box and login with settings password on the Hub's base sticker (or your own if you changed it).
Then go to Advanced>wireless>smart wifi - and tick the disable “channel optimisation” box and save settings.
Then, go to advanced>wireless>security, and rename the 2.4 & 5 GHz network ssid's. Just type the two new names in to whatever you like and something that will differentiate them (e.g - xxxxx_2 & xxxxx_5) -- use the same password for simplicity, Then, apply settings and restart the Hub. Your 2 wifi networks will now be clearly separated - and you can then select the network you want to connect to individually from the "available networks" list on each device.
Note all your wifi devices will need re-connecting to the new SSID's and passwords as you have changed thm from previous.
5 GHz is usually better and subject to less interference (and is better for iDevices ) than the 2.4 one - although this one has the better "range" and some older/cheaper/dumber devices (like HP printers) can only use this one.
You should also use a wifi analyser App to check which 2.4 channels are being heavily used around you and move yours to one of numbers 1,6,11 that is least so, but it wont help if there is other interference.
See if these changes help - you will lose any “seamless roaming” benefits but it may not matter and you can always change the settings back by doing a " pinhole factory reset " if you prefer the way it was - or it doesn’t help.
Also described differently in this link:
https://community.virginmedia.com/t5/Speed/Slow-wifi-connection/m-p/4063642#M213435
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John
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I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router +2 Airport Express's. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.