Phone numbers are still required for registration, and the option to make it undiscoverable (so that someone who knows your phone number won't find you on Signa

Phone numbers are still required for registration, and the option to make it undiscoverable (so that someone who knows your phone number won't find you on Signal) is not the default, and I think you can't set it before you create your account, leaving a small window of opportunity for someone to discover your account. If Signal was uncompromising on privacy, being undiscoverable by phone number would be the default. In fact, they wouldn't ask for a phone number at all. These are reasonable compromises, but compromises nonetheless.