All you need is to have a US IP address to get it working. But, that requires a VPN (which is sometimes expensive) and you`ll always have to go through it to access the Voice service. That most likely means no access from an Android phone though I'm not sure.

As for the phone number, it's going to be local to whatever adress he put in in the US, there are no Canadian phone numbers for Voice.

What really makes me angry is that Google purchased GrandCentral to get their voice software, then they completely shut Canada off from service and haven`t opened it in years. It's not like GrandCentral didn't get the CRTC approvals required to give service, so what's holding up Google? I'm really mad at them for how all these services only work in the US. There are legal considerations, but you'd think it wouldn't take 3 years to go through these kinds of hurdles when you're freakin' Google!

i suggest you try dell voice :) they are doing exactly the same thing