Re the iPhone issue see this.
https://community.virginmedia.com/t5/Networking-and-WiFi/iOS-14-Weak-Security/td-p/4410050Have you tried a pinhole reset of the Hub to revert everything back? If not - make sure the 2 passwords on the Hub sticker are still there and legible first !
Disconnect any ethernet cables from the Hub, and then with the Hub still "switched on" throughout, press pin in firmly with paper clip/SIM tray tool or similar "thin thing" and hold it firmly for at least 60 seconds, release the pin, leave for 10’ to stabilise - dont manually switch it off at any time.
See if that sorts it
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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.