I don't know, my wife gets spam calls almost daily, but i almost never get spam calls. on the otherhand I almost never actually give anyone my real phone number and just give everyone my Google Voice number instead. Google seems pretty good at detecting and filtering them out. the only people with my real phone number are family members, my employer, and a few friends from high-school that had it from before i signed up for google voice in the 2000s.
Google Voice indeed seems to be much better at spam call detection than anybody else. Most of them don’t even make it to the "spam" folder in the app for me; they must be rejected at some lower level due to very high confidence.