Phone number privacy and usernames are now rolling out to everyone using Signal version 7.0! Update your app to take advantage of these new features 🎇

https://signal.org/blog/phone-number-privacy-usernames/

Keep your phone number private with Signal usernames

Signal’s mission and sole focus is private communication. For years, Signal has kept your messages private, your profile information (like your name and profile photo) private, your contacts private, and your groups private – among much else. Now we’re taking that one step further, by making your...

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@signalapp but we still need to provide the number phone in order to open a new account
@castrillo @signalapp This reduces spam. ;-)
@manfredmayer @castrillo @signalapp I would certainly doubt this, as phone numbers (especially in some countries) are cheap quite cheap. So if a spammer really wants to, it's not much of an additional burden
@j_r @manfredmayer @signalapp right, eg in spain you need an ID card or passport for purchase one, on that case they can link the SIMcard ID with your "real" ID card, but yes there are "other ways"