As SRR implies, there is an important point about VM - you cannot replace their kit with your own. Best you can do is stick the VM kit into modem mode, which essentially just means one network port works as a bridge and provides an IP address, and you plug something else into that to do all the heavy lifting like DHCP & etc.
I have to say, my long experience with VM is that when it works their service provides better internet than pretty much any other ISP. However once you get out of ‘its working fine’, thing get pretty poor pretty quickly.
Latest example - I’ve had them for years, and I still actually have a Superhub 1. I got a letter from them saying they were retiring the contract I was on and the new service they were shifting me to required a Superhub 3. They would provide one FOC, I just had to be in to receive it and plug it in. I went to the suggested website to arrange a delivery day but the website was broken. I tried again the next day, it worked. I arranged a day, they sent me an email saying my new router would be delivered some time between 8AM and 9PM. Hmm.
The day came. I stayed in the whole day. No package arrived. I phoned them up the next day, their response was ‘our system can’t handle rescheduling the delivery, sorry’. So I still have the Superhub 1. I assume at some point they will change something upriver and it will stop working, leaving me with no internet and no way to do anything about it, because I can’t plug in non-VM kit instead and they’ve completely failed to provide kit that will work.
i have decided to move on. A couple of the mobile providers are saying they will have ‘5G home broadband’ (i.e. a router which uses a 5G connection to the internet instead of a cable) to my area by the end of the year. That promises performance roughly the same as VM’s best deal for roughly the same price, but no phone line required and no line rental to be paid. And if I want to swap provider, all I need is to get the correct SIM.