Your maximum speed on wifi with the Hub4 is ~500Mbps - as the Hub is only wiffi5. You need wifi6 equipment to get higher speeds.
See this...
https://community.virginmedia.com/t5/Tech-Chatter/Useful-chart-to-show-why-you-will-not-get-1G-on-Wi...The dropping to 100 may be for other reasons (interference? dropping onto 2.4GHz?).
Ethernet speeds should always be ~950 - if you do it this way.
__________________________________________________
As you expect >100Mbps then connect a 1GB enabled computer/laptop, with up to date drivers, via a NEW and working Cat5e/6a ethernet cable, directly to the Hub which you have put into “modem mode” (
https://www.virginmedia.com/help/virgin-media-hub-modem-mode ). This ensures that NO other devices are connected
Test speeds at
https://speedtest.samknows.com/ - try on 2 different browsers as Chrome sometimes gives odd results.
If they are still low – boot your device into Windows safe+networking mode - to disable any potentially interfering software - and try again.
There are many posts on here (I have a list of ~30!) where QoS software, anti-virus, unknown/flaky software, old network card drivers, corrupted browsers, bad cables or other connected devices are limiting speeds on tests.
Report back what that gets.
For examples of why... see message 7 in the first thread and 9 in in the second and 3 in the third
https://community.virginmedia.com/t5/Speed/HUB-5-and-IGB-wifi/td-p/5088163https://community.virginmedia.com/t5/Networking-and-WiFi/Slow-Ethernet-Speed/m-p/5060946#M484321https://community.virginmedia.com/t5/Speed/Upgrade-from-M600-to-Gig1-no-speed-change-with-Hub-4/td-p...
--------------------
John
--------------------
I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired, 2 on WiFi) Hub5 in modem mode with Apple Airport Extreme Router +2 Airport Express's & TP-Link Archer C64 WAP. On Volt 350Mbps, Talk Anytime Phone, x2 Mobile SIM only iPhones.