Scam alert.  And they called on my unlisted prepaid phone, too!  Called yesterday on my landline.  I now understand more.  It always starts out "hello, this is Josh..." and then asks "can you hear me?"  which is actually clever, because you then assume it is a live caller with a bad connection, and it makes you respond.  But it's a robocall, not a person.  Says "you've been preselected," yadda yadda yadda.  It's a scam robocall, don't foolishly answer as I did.  I cannot believe there are no other complaints here yet.