I'm not sure why someone as intelligent as Rushkoff (and I'm guessing you as one of his readers)…

A smart phone is external to one's body so a person can easily NOT keep it one's person and thus not be tracked. Nanotech inside one's…

I'm not sure why someone as intelligent as Rushkoff (and I'm guessing you as one of his readers) has trouble understanding this. (Before I write it, I'm not saying I believe it).

A smart phone is external to one's body so a person can easily NOT keep it one's person and thus not be tracked. Nanotech inside one's body? Different story.