I live in the U.S., have a U.S. phone number, and get maybe one spam call every six months. (Spam texts about once a month, with the exception of before elections, when it’s more.) I wonder what causes the difference. Do I have a newer phone number that isn’t on as many lists? Or is my carrier filtering calls before they get to my phone?

I briefly activated a second SIM on an MVNO that gave me a new number, and that one previously belonged to an old woman who got spam calls roughly every ten minutes. Clearly there is an issue here, but it doesn’t affect everyone equally.