> Can you send SMS to a regular number with this?
Why would it do that? Every phone has perfectly good sms app.
What would that even mean? Using sms as a transport layer? Or making messages passed through internet look like pseudo sms messages to someones phone number?
https://support.signal.org/hc/en-us/articles/360007321171-Ca...
Something like Google Fi can provide a web-based client for your SMS (which works on any device and doesn't require cellular) because they know your virtual SIM and can emulate it as needed. But I don't see how Signal could pull that off.
If I remember correctly, Signal was first explained to me as a secure SMS app. That is it stores your SMS's more securely than the stock apps did... and if you were messaging somebody who also used Signal, then you'd be upgraded to an end-to-end encrypted message.
That said, now I'm on iOS, it doesn't let me do that, so I only use it for contacts with Signal.
To avoid splitting one's messaging threads between two different apps.
> Every phone has perfectly good sms app.
Eh, I find the default Android SMS app to be lacking. I can't organize threads or mark messages as unread. You know, basic stuff that email apps figured out a long time ago.