Day after day after day I get calls like this from pests who don't even bother to speak. I'm sick to death of it. Please never answer calls from unknown numbers - or call back for whatever reason people seem to feel compelled to phone someone who couldn't even be bothered to leave a message and is probably a criminal scammer. If no one ever answers, this plague of scam/nuisance calls may eventually stop - though I won't be holding my breath.