When you receive your new hub it will have a different SSID and password to your current hub.
You can though log into the hub settings and change them to match your current SSID and password.
Details of how to do that are shown on this page
It should just be a case of plugging in the new hub to replace your existing hub, then plugging the phone adapter into the phone socket on the new hub.
The info below is from the following page
On the day of your switchover, unplug the phone cable of your main phone (or base station if it’s a cordless phone), from the wall socket. If you have any other devices connected to this socket, or you use internal phone sockets around your home, please give us a call.
2. Grab the adapter we provided and plug it in to the top grey port, Port 1, on the back of our Hub.
3. Now, plug the end of the telephone cable you unplugged from the wall socket in to the adapter.
4. Wait a couple of minutes for a dial tone, then make a test call. Your new services from Virgin Media are all set up and ready to use.
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