I almost never get spam calls because I'm somewhat protective of where I put my phone number, but I do occasionally get a wrong number that could also just be a scam attempt. In general, if a number isn't in my contacts, I don't answer. If it's important, they can text me.
i pretty much only get wrong number calls these days, and i try to avoid using services that use SMS verification at all it's pretty clear to me that the phone companies are not letting numbers fallow a while before assigning them to new subscribers, i'm constantly getting calls from people speaking portuguese expecting some other person to answer