Basically none at this point. Unless it’s recognized as coming from one of the handful of people in my address book, or occasionally if I’m expecting a call (like from a doctor or the mechanic or something). But otherwise there’s no point. No one that would contact me or that I would want to contact me would use the phone - they would text, IM, email, etc. The odds of a phone call being junk or a scam is far too high to bother with.