They do it because all the successful social apps need to make contact discovery easy. Signal does it with hashes which it doesn’t store anyway https://suppor

They do it because all the successful social apps need to make contact discovery easy. Signal does it with hashes which it doesn’t store anyway https://support.signal.org/hc/en-us/articles/360007061452-Does-Signal-send-my-number-to-my-contacts- https://support.signal.org/hc/en-us/articles/360007061452-Do...