I've had issues with high latency and internet drop outs for months.
I've had engineers come out on at least two occasions. They've replaced the wiring outside my house.
I've had a new modem sent to me which has made no difference.
This is my BQM for the last 24 hours. I can assure you that I have a few months of graphs that I can show look exactly like this:
I use the router in modem mode. I have a few wireless devices in my house, but 90% of the devices I have are wired.
I am at my wits end. No one at Virgin Media support seems to want to help. This is literally my last avenue before I just cancel the service and go to another provider - who undoubtedly will be slower - but at least they can provide me with a stable service.
Thank you for reaching out to us in our community, I am sorry to hear we have been unable to find any further issues after all cabling channged.
I have had a look our end and cannot see any issues at all, all I can see is that you have a 3rd party router, please remove this and run some further broadband quality checks with our router in router mode.
From what you advised the technician had advised sounds like this may be due to the amount of people now using the service for working which is causing some digestion.
So the most surprising thing is that in router mode the connection is more stable. Why is a question I'm going to ignore (because surely in modem mode it does less work and therefore should always be more stable) but ok - accepted...I'll leave it in router mode.
However - I'm still getting really spotty performance. It definitely isn't cutting out anywhere near as much as it was before, but it is overall more laggy than before.
I was having the same issue as you since late March. Last month I changed my Virgin Media package from M350 to M100 and had another line installed with Zen Broadband. This came to roughly the same price as I was paying for the M350, maybe an extra £5 on top.
I have both the Zen modem and VM SH3 in Modem Mode connecting to my Asus RT-AC88U using Dual Wan. My Asus router will direct the traffic of my devices to whichever provider I want; for example my gaming PC and PS4 will use the Zen connection and all other devices (mobile phones, Chromecast, etc) will use Virgin Media. That way I ensure my gaming experience gets the best stability possible. Furthermore it will also act as a failover, so if one connection goes down the router will use the second connection as a backup.
This is today's BQM for both my Zen and Virgin Media connection.