iTop
No it's not a phone, but he did do a pretty good job of cutting up and making this thing foldable. It would be great for watching videos if he hadn't done it due to the screen being broken.
I am not even sure if it is a working model (clearly it won't play videos, but it could play music still). The top half holds the battery, headphone jack, screen, and hold switch, the bottom half holds everything else which includes the motherboard, HDD, click wheel, and dock connector.
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Guy Cuts iPod in Half, iTop is Born [via MinistryOfTech]