The first thing to take into account is that despite the term often being (mis)used, the 'new' VM telephony system is absolutely NOT a VoIP setup, think of it more a system of 'piggy-backing' the standard 'copper-wire' based analogue connection, onto the coax cable - but that's about it. It's not IP-based telephony as most people would recognise it, so you can't use any sort of WiFi or IP-based phone handset.
There are very few options available, which are;
a) you have a single phone connected to directly to the Tel1 socket on the hub - from VM's perspective, this is by far the most convenient (for them anyway) option and they one they will 'push', even if it means moving the hub or phone.
b) You have a DECT phone system, the base station plugs into the hub as above and the 'satellite' systems are just dotted about the house. Of course this may well require you to purchase a new phone system.
c) For those with multiple hard-wired phones connected to wall sockets, this becomes a bit more tricky. Officially VM are supposed to offer a service by which one of their techs will wire the hub into the nearest 'socket' and hence be connected to all the others.
However, in answer to your question about connecting a remote phone without any wires, alas, you can't!
