Thanks! My realistic use case is that I am already speaking to someone who I know and trust, so ideally exchange credentials in person. A preferred out of band secure messanger of choice is probably fine.

What do you guys talk about?

I have my wife's phone set up on autolisten running in the background, so I just pop in and ask how her days going and crack jokes.

That's funny but it must absolutely drain the battery of her phone, no?

So far it's lasted all week with maybe 10% -15% loss per day. It's not her main, actually just a old phone I had laying around.

I think it's a pretty light background process.