You don't get spam texts either, then?

I use an app called Hiya so Google/Android isn't offering me the option to turn off spam. It seems to know the filter is already baked in.

I get a lot less awful stuff than I might because if I'm asked for a number and don't want to but have little choice I give them my Google Voice number. It used to be my house phone until I ported it into Voice. Now I check in there on occasion and see hundreds of spam calls blocked by Google. It does have access to my list of contacts so if one of them calls there it is forwarded to my cell phone to ring and be answered.