From what I can tell over time it seems to be random initial chance + random chance as your number gets shared with the 3rd parties you interact with. There are

From what I can tell over time it seems to be random initial chance + random chance as your number gets shared with the 3rd parties you interact with. There are a few things one can do, like never pick up when it is a spam call, but at the end of the day there is still the element of chance to it. I went a good 5+ years without spam calls/texts. Lately I've been getting the occasional scam recruitment text every 1-2 weeks for some reason. Hard to say why exactly, but hopefully it fades away and I get the peace again.