Comment by dns_snek

> Each version of the Signal app expires after about 90 days, after which people on the older version will need to update to the latest version of Signal. This means that in about 90 days, your phone number privacy settings will be honored by everyone using an official Signal app.

This sounds terrible. Are they saying that your phone number will still be visible to anyone running an unofficial app, even if they didn't have it before?

Is it enforced by the protocol or is the number just "hidden" by the official app?