Until the year 1900 every telephone subscriber had to pay $240 a year, and manifestly only families in affluent circumstances could afford such a luxury.
These companies have made valuable contributions, of which perhaps the automatic telephone, an instrument which enables a subscriber to call up his " party" directly, without the mediation of " central, " is the most ingenious.
So hackers in this case, apparently back in 2019 are able to exploit a flaw in Facebook's systems where they were able to match phone numbers of apparently hundreds of millions of Facebook users with their Facebook accounts.