Signal is working on a way to sign up without a phone number. The feature has not yet been officially confirmed, and it is not yet known whether it will be available to all users or in what form.
Remember metadata , they also know person A send message to person B at specific time. Of course knowing phone number also gives them your location from cellular towers.
Remember metadata , they also know person A send message to person B at specific time. Of course knowing phone number also gives them your location from cellular towers.
If you’re using text messages, yes, but not with signal. They just know that you have it, nothing more.