Received a call from this number (on my cell phone) with a recording saying something about case file and to call back at the number that called.  They called back again an hour later and left the same half of a message.  I do not give my cell phone number out to anyone I do not know so if I receive a call on it and it does not come from one of my friends I do not answer it.  I have a plan with very limited minutes for emergencies only.