Apparently Facebook has been letting people search for you, including advertisers, based on the phone number you use to get SMS codes for authentication. And, the number is shared with Instagram and Whatsapp, and apparently vice versa. In other words, you're probably screwed one way or another because even if you didn't give your phone number to one of these probably someone you know has shared their address with your phone number in it. I wonder how many email providers use your phone number for targeting purposes?
https://www.tomshardware.com/news/fa...rch,38740.html