nomoro.com works well. I love that it rings once and goes away. If the TV is on and I'm paying attention I can see who is calling and being blocked. I get a lot of calls that are spoofed. We have the jury duty - there's a warrant for your arrest because you failed to show up for jury duty but you won't go to jail if you buy gift cards and call with the number. Seniors are the targets and there were so US Marshals will not arrest you, the court does not issue warrants for missing jury duty and report calls to the local FBI office and FTC. By the way, I have received calls that were spoofed from my health insurer's number. I did not answer, did some research and found warnings that scammers are trying another way to get personal information.