Comment by p4bl0

It seems there's nothing on Signal's blog as of yet, but the project's git repository was tagged with v7.0.0 yesterday and we can see from the commit history since the previously tagged version (v6.74.4) that there will be a setting to hide one's phone number [1], as well as disabling the previous default behavior of advertising that one is on Signal to all of their contacts already using it [2].

[1] https://github.com/signalapp/Signal-Android/commit/8797236b5... (PNP stands for "Phone Number Privacy")

[2] https://github.com/signalapp/Signal-Android/commit/6097e6c30...