Shenzhen, ChinaAt the Huaqiangbei Market in Shenzhen, you can build a smartphone from scratch in a couple of hours.
Spread over several floors and covering hundreds of thousands of square feet, the market is home to vendors selling the parts that make up your standard phone — cameras, motherboards, frames, screens and so on. All you have to do is buy the right bits and know how to put them all together.
