[computing]

This is part of my question. How does Google provision VoIP numbers? When someone calls / texts a VoIP number from a normal number, that call / SMS travels over normal wireless infrastructure. So VoIP numbers are still connected to the same infra, right?

[BenjiWiebe]

As I understand it, yes, but not through a wireless carrier. They'd tie into the infrastructure somewhere else. They'd be more of a peer with Tmobile then a customer.