Don't have a smart phone... just a dumb phone. It does, however, block robo-calls and it tells me who's calling or gives the phone number of the person calling. (Come to think of it, perhaps it's not such a dumb phone after all!) I never answer unless I recognize the name or phone number... just let it go to voice mail. If it's a legit call, they'll leave a message and I'll call them back.