Using a Phone as a Credential?

Rit is a little difficult to explain when you were talking previously about settings. So the web service has something in the cloud that you can like, have these devices talk to as like, the pass through to negotiate ths channel. For example, ai honds will use a particular gugle service as their tunnel server. The reason is, am a trick i haven't v mentioned yet, which is that, if you've just used a phone fire scanning a cua code, the phone can then say to that lat top it spoke to, hey, if you want to talk to me again, here's a bunch of keys. M don't bother like scanning the ca code