The phone-app setting “Block calls from unidentified callers” – does this block calls from persons not in your Contacts? “Unidentified callers” is unclear.
And does this mean that their call goes nowhere, or does it go straight to voicemail?
What I would like is to have such calls (from people not in my Contacts) go straight to voice mail, without making my phone ring. Is that what this setting does?
No, (If we’re talking about the Google dialer app). Per the below Google link, it "will block calls from private or unidentified numbers. You will still receive calls from phone numbers that are not stored in your contacts. "