All I really want to do is allow calls through to my phone that are stored in my contacts. If they're not in my contacts, I'd prefer not to be notified and have it sent to voicemail.
One problem is they can easily spoof the number. I've received 2 calls from Bank of America's 800 number, that weren't actually from Bank of America (they were pretending there was a problem with my account...phishing for info...). They were in my address book, and showed up as such. You can't trust caller ID. They might not have your friends phone numbers, but you probably also have other major institutions that you trust in there as well.
The fact that it is not perfect is pretty irrelevant to the need for this kind of basic functionality. I'm going to assume iPhone here because I'd be surprised if Android doesn't have this capability.
Andoird does. I think they added it in Lolipop about 5 years ago (only allowing calls/notifications from contacts). You have to set up do not disturb and then go and make exceptions for contacts.
The solution to this is never give out any PII when receiving a call. Ask what theyre calling about, then hang up and dial back. Yeah, you enter the hours long call queue, but you're not giving out your info to a potential spoofer. Also, don't call the number they give you on the phone. Look up the number for your bank (usually easy enough to find on the back of your debit/credit card). Same is true for any organization that potentially has info that could be used for identity theft. Hang up and call them back independently.
