That structure resembles our brain: a reactive, resilient, shifting network of connections among billions of individual human brains using smartphones and other technological devices, storing, aggregating and routing information in complex and arbitrary ways. If consciousness is to be found in our technology, I wouldn't look at the individual smartphone, but at the network of all smartphones.
Large networks, e.g. the brain or the Internet, on the other hand, are exponentially more complex and so offer the possibility of being unexplainable when looking at certain behaviors. A recursive problem in a sense.
I’d be surprised if there is anything that it’s like to be a smartphone, or even an AI running in a smartphone, but I wouldn’t rule out the possibility.
(Physicalists such as Daniel Dennett [and myself] deny that there is such a problem--that dualists like David Chalmers are operating off of erroneous intuitions, not sound arguments.)
Emphasis on _a_ human.
I've heard that there's so many layers of abstraction and obfuscation, that there is no one person who can explain thoroughly every layer of a modern computer, from the volts in the bits, to the web front end, through the cloud.