I really don't get the big "use signal" push at this point in time because even if it's private and the encryption is solid, it's a fucking American company. It's so easy for letter agencies to get information on their users from them, don't you realize that they can't refuse to give out your number if they ask for it and that once they have that your identity and location are immediately and thoroughly compromised? If you are subject to US jurisdiction and could be seen in any way as opposing its government, I really don't think you should be using it.