Yes you are reading right, if you use Facebook all your personal cellphone data may be being stored by them.
Things have gotten even more messier for Facebook and their data breach issues now that a user exposed via Twitter that the social media platform stores people's texts, contacts and even telephone data.
As of right now Facebook insists that the function has always been “opt-in only” thing and not all users are part of this.
The data was uncovered when users delete their profiles and are offered to download it for their records 🗂 below are steps for you to see if this is the case with your Facebook account or you can simply click here.