I got a call from 401-562-1477 at 3am a few nights ago.

Another random number that calls and never leaves a message.

It was a robo-call message saying "This is not a sales call. You have been referred by a family member or friend." (not exact but close enough). Something about a security system that could be installed at no cost.  

I couold opt in to get more information or choose to have my number removed from their system  Except I have received these calls in the past, so the removal option doesn't work.

Nothing is free.  It was a sales call and they were not referred by a family member or friend

This number had called my cell. Luckily the latest greatest of Android has a nice little call blocking app that white lists. In other words - you can assign people you WANT to hear from in contacts and that is the source of the white list. Any other calls WILL NOT RING the phone. I love it.

The call does appear in call logs though.

if you call back you can opt out of the call list.