Not 'smart phone's' in reality. Dumb owners instead. Any cell phone only outputs what the owner wants it to. Nothing more. It appears that most people cannot exist without that phone today. I can and do. In fact, most time's mine is turned off.
I find it amazing that if you go to a restaurant or any public venue, the majority of people are using their cell phones and texting, all the while, never communicating with the person seated next to or across from them. Crazy stuff. When the Houti's cut the undersea cables that run through the area where they are attacking merchant ships (and they will at some point) and the Internet goes down and so will cell service. that will be an interesting time for sure. Cell phones will become useless rocks, just like your computer.