And to add to that, when I've been in Shenzhen, China, I saw lots of recycling of smartphone parts. I've managed to replace my cracked S4 screen and a broken camera for a small fraction of the part price, on the spot in 10 minutes, on the condition that they get to keep the broken part - because what they're doing is taking the part further apart, repairing or replacing the broken component, and then using it to repair someone else's phone.