If your main concern is privacy and security, a basic cell phone can offer some advantages because not all of them have full WI-Fi connectivity, GPS, apps, and sophisticated operating systems. But like any cellular device, they can be used to track you and your whereabouts, and that's true even of a basic cell phone. That said, if your cell phone has no apps to speak of, and you don't use it for web browsing, that'll limit a good deal of your exposure.