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what? Build a smartphone? are you off your rocker?
@Steemitcards + "!spam"

Yeah, something like this, but with newer H/W and a bit slimmer, when you remove the ethernet connector and those double USB boxes, it can get quite slim :)

http://www.instructables.com/id/Build-Your-Own-Smartphone/

But I'd leave the wiring to someone more experienced...