On its 10th anniversary, Signal’s president wants to remind you that the world’s most secure communications platform is a nonprofit. It’s free. It doesn’t track you or serve you ads. It pays its engineers very well. And it’s a go-to app for hundreds of millions of people.
It does send a “your safety number has been updated with user” message. But not as an automated message. Only when a new signal thread is started.
Haven’t tried when only logged in to desktop and changing devices / numbers so I can’t speak to that.