I use this android app (paid $1 for the ad-free version): https://play.google.com/store/apps/details?id=com.vladlee.callblocker https://play.google.com/store/ap

I use this android app (paid $1 for the ad-free version): https://play.google.com/store/apps/details?id=com.vladlee.callblocker https://play.google.com/store/apps/details?id=com.vladlee.ca... It specifically has a setting to force all non-contact list calls to voicemail. I had to do this when I started getting 8-10 spam calls a day.