https://www.theguardian.com/technology/2018/mar/25/facebook-logs-texts-and-calls-users-find-as-they-delete-accounts-cambridge-analytica

Leaving the social network after Cambridge Analytica scandal, users discover extent of data held

As users continue to delete their Facebook accounts in the wake of the Cambridge Analytica scandal, a number are discovering that the social network holds far more data about them than they expected, including complete logs of incoming and outgoing calls and SMS messages.