According to a report, Facebook is facing backlash over their secure login process two factor authentication, where Facebook asked users to add their mobile number, which can be searched by advertisers.
“Facebook 2FA numbers are also shared with Instagram which prompts you ‘is this your phone number?’ once you add to FB. Whatsapp also share phone numbers with Facebook. Facebook shares phone numbers with advertisers,” said Burge in a series of tweets.
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“For years Facebook claimed.. adding a phone number for 2FA was only for security. Now it can be searched and there’s no way to disable that, ” Burge added.