Who called from 7818840698

This # Called my cell phone two days in a row - both times hanging up leaving no message.  This # comes up as:  No name.  Guessing it's a telemarketer..

This number calls my cell number and hangs up.

This # call my work phone twice this week with a recording something about "Hello!  FBI has reported...".  I hung up after that.

They just called me 2/18/2014 and said the same thing as Harry. They wanted to put a sign in my yard and would install a security system for free if I allowed them to put the sign up. Um really, no thanks.
Then it asked me to push 1 for more info or 2 to be put on do-not-call list. I just hung up.

Just called me again.  No Voicemail.