A guy named Scotty from US, came to Shenzhen, China and found all the parts required to build an iPhone 6s in the famouse electronic parts marketplace, Huaqiangbei. Then he successfully built the phone out of the parts and it working! Here is his original post and a fabulous video shows his journey. This is really awesome, kudos!
This guy built his own iPhone with spare parts he bought in Shenzhen, China