The U.S. government agency regulating telecommunications says there is about a 50% chance that when your phone rings it is a spam robocall. That’s fact not probability.  U.S. mobile phone users received 48 billion robocalls in 2018 alone.  This is more than 100 calls per line.

A computer scientist at the University of Maryland , Raymond Huahong, Tu, has researched the technologies and practices of robocalling and further explains more about why these calls are able to reach your line, sometimes disguised as a legitimate or local number, and elude the do not call registry. READ MORE HERE