I have my contact list in it, and a few I didn't enter who came through on the Announce system so I added and named them. That happens with both Mobile and Landline incoming of course.
I haven't bothered with a Block list, as obviously that is pointless for spam/phishing prevention. It's only useful for known valid numbers. Similarly, whitelist? That does sound like a network system. Is that the Contact list or something almost identical?
International comprises most of the unwanted ones of course.
Only one phisher/spammer ever went to the phone's answer-machine in all that time. There are many "Unnotified calls" per week with weird numbers, exactly the type that showed up when they came in on my previous non-filtering system. I just click through them on the calls list when I remember to keep it clean. Only the missed calls from contacts show up as a count on the main screen, like the answerphone count.
I don't see your problem, other than the faulty Jersey network system. I'm surprised your parents are repeatedly confused when they hit the "Announce" system when it occurs. I know several 80+ and a few 90+ people, being in the mid-70s myself, who are well up to understanding that sort of thing once it's explained.
Connection - Three 4G, tbb tests normally 35-45Mpbs down, 65Mbps off-peak, 9-24 up.
If you never think of anything off the wall, you'll never think of anything original.