If you have Verizon, the call filter app is pre-installed. I have Verizon, and posted the directions that worked for me.
To get to this setting, open the "Call Filter" app
Click the "Get Started" button on the bottom (It's free, BUT it REALLY tries to push the paid version on you)
Now click the hamburger menu (top left) and select "Block Management"
Click the SPAM filter
There is a toggle for on/off - WIth off, there is no filtering at all. Clicking on will allow you to change the level
All Risk
Medium and High Risk
High Risk Only
Are the available options. I had to set mine to the Medium option to be able to receive all the calls I wanted to.
I also posted the T-mobile for anyone that has T-mobile.
Most of the larger carriers just put out new spam blocking technology. This occurred as most of us were already updating to PIE coincidentally. From what I can gather, they are scrutinizing calls originating from VOIP especially, and on the highest settings, most calls are being blocked or sent directly to voicemail. My coworker had not set hers up. So, I am assuming they defaulted to the highest level when they updated the app. It is worth checking on your phone.
https://www.forbes.com/sites/brookec.../#1e8b423477a2
Verizon
https://www.theverge.com/2019/3/28/1...ifying-service
AT&T has one too:
https://www.engadget.com/2019/03/20/...erified-calls/