CCTV's 'Economic Half Hour': Uncovering the "knock-off phones"

I don't know if you notice or not, there are a lot of people around us using cellphones with strange brands. They are not international brands like Nokia, Samsung and Motorola, nor domestic brands like Bogo, Amoi and ZTE, but all kinds of unfamiliar names that we don't usually see in advertisements. These cellphones are called "Shanzhai" phones, which means bandit. What kind of cellphones are they? Our reporter conducted an investigation in Shenzhen, the birthplace of these cellphones.