I don't believe there has been any such disposition in this thread. There have been vague assertions that it's been asked and answered elsewhere. Meanwhile, t

I don't believe there has been any such disposition in this thread. There have been vague assertions that it's been asked and answered elsewhere. Meanwhile, the Signal source code, and experience with the software, clearly demonstrates that a phone number is required to be proven for registration, and is persisted server-side for anti-spam, account recovery, and (as of a few months ago, optional) contact discovery purposes.