Last week I started getting several Robocalls an hour. I set my phone to silence any unknown number thinking that anything important they would leave a voice mail. That worked fine for several days but now they have started leaving a voice mail of 4 seconds of static. So now I have to check each one before I trash it. My phone service does not have anyway to deal with this problem unlike some phone providers. I believe that these calls are not lawful but there seem to be no enforcement. Not sure what to do other than changing my phone number which would be a major pain.