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My main gripe with Signal is that it requires your phone number and you cannot setup your own instance. A major turn off for me.

• reitanqild 8y ago
  FTR and as a user of Telegram who has often recommended it: Telegram also requires your phone number.
  • yorick 8y ago
    Telegram does not require your phone number, you can set it up with just a user name.
    • GranPC 8y ago
      No, you can share just your username, but you need a number to sign up.