Facebook won’t let you opt-out of its phone number ‘look up’ setting

Users are complaining that the phone number Facebook hassled them to use to secure their account with two-factor authentication has also been associated with their user profile — which anyone can use to “look up” your profile. But some users are finding out just now that Facebook’s default setting allows everyone — with or without an account — to look up a user profile based off the same phone number previously added to their account. Facebook gives users the option of allowing users to “look up” their profile using their phone number to “everyone” by default, or to “friends of friends” or just the user’s “friends.”

Source: techcrunch.com