Comment by instagib

For iPhone, put the phone in do not disturb. It will send all calls to voicemail. If someone is on your emergency contacts, favorites, or 1by1 focus then a repeated call will actually ring your phone. Otherwise no notification. Not even a text counter increase unless the person taps (notify anyway).

Tried to do the same on an android phone and it didn’t work.

You can also port your phone to google voice or Fi and give away all your call information to them. Very few spam calls get through their filter.

I like the change phone area code to out of area and block all phone calls from that area that some call services provide.