I too always had issues with my windows phone and the virgin hub. Ive got v2 hub.
The wireless would drop out both 2g and 5g and if i was in the same room as the hub the phone would constantly reset over and over. Had to buy a asus router and have had no problems since. I use the hub in modem mode. Something with the windows phones does not work well with the VM hubs as it never happened any where else with different isp's only VM hubs.
Ive had zero wireless drop iuts or internet drop outs since using a third party router.