In response to the phone number scandal, Facebook spokesperson Jay Nancarrow told TechCrunch that such settings "are not new", and that "the setting applies to any phone numbers you added to your profile and isn't specific to any feature". Today, the 'Who can look me up?' settings control how your phone number or email address can be used to look you up in other ways, such as when someone uploads your contact info to Facebook from their mobile phone.
2FA or the Two-factor authentication is a security measure that requires your phone number so as to make sure that it is you who is making a log-in attempt on a different device or from a different location.
Last year, it was discovered that the social network was allowing advertisers to target users by uploading information which Facebook could match against a phone number. Don't confuse what's going on here with hiding your phone number from your profile, that still won't prevent people from searching for you using your number.
Image Source Electronic Frontier Foundation
As a user, you can hide your phone number from the general public and restrict who can look you up by phone number. You can find the option in Settings under Privacy. Previously user has to enter your personal phone number in the Facebook search bar or into their phone contacts, the outcome is the same.
To cap it off, Burge suggests this new reliance on the phone number is Facebook's reaction to data regulations like GDPR. The company uses that unique ID, since it's tied to you, and can use it to sell ads, much as it does with everything else it knows about you.
The setting, available in the "Privacy" tab, is set to "everyone" by default and you'll have to change it to "friends" or "friends of friends". To add Facebook, open the authenticator app, tap to add a new account, and either scan a QR code or enter a code provided by Facebook.
So, as you can see, it's very hard to avoid giving Facebook your phone number when everyone from advertisers to high school besties can upload it to the social network with a few taps.
"Although two-factor authentication is a necessity for individuals in order to help protect their accounts from being hacked, allowing phone numbers to be searched on one of the world's largest social databases may not be the best idea", he added.More news: Huawei Sues U.S. Over Equipment Ban in Escalating Legal Clash
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