I started reading some comments here and then fired up FB in another tab because I have been away from it for quite a long time. The first post is: "Add a phone number to your Facebook account"
No.
FB knows my number indirectly via friends anyway but I have not ever given it permission to actually admit to knowing it. I never will. To be fair, I have never received a call that I could attribute to FB abusing that chain of cough trust.
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