I can save calls in my Uniden cordless phone handset at home.  I save ALL of the scam, telemarketing numbers and edit the names to "ZZZ" and assign No Ring to them.  If you assign "ZZZ" to them, then you won't be scrolling through all of them when you want to scroll through your legit numbers in your phone book. They'll all be at the very end. They can call all they want but it doesn't ring. If I'm on the phone with call waiting and see the "ZZZ" on the screen, I know it's one of them.