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.
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.
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.