Google Call Screen

Currently available only on Google Pixel phones, Call Screen mimics, digitally, what many of us have done with answering machines for years.  Let the machine answer and spew out its "we're not available, blah, blah" message, then listen for the caller to identify themselves before deciding if you want to talk.

When a call comes into the Pixel, you have a "Screen call" option which activates this process.  The caller gets the message shown below and whatever they say is on-the-fly transcribed to text, and that's usually enough to determine if the call is legit or an annoying telemarketer or scammer.  You can report the number as spam, ask for more information, tell them you'll call back later and other options.

Google hit a home run in 2018 with this killer feature.

https://www.cnet.com/how-to/google-call-screen-everything-you-need-to-know