Mr Number does NOT work the way the app claims it will due to using Consumer cellular. Consumer cellular uses the exact towers that ATT uses so you can get the calls. ATT charged me almost four times more then Consumer cellular for using the same towers-so same coverage. So, just know that it will seem like once you sign up for Mr Number that you will start getting twice as many spam/spoofed/robo calls for the first few months. Then it slows down and gets better.”]
Source: https://apps.apple.com/us/app/malwarebytes-mobile-security/id1327105431