And besides shells, there are all kinds of accessories you can buy. For example, there are lights that attach to the receiver and flash when the phone rings, as well as headphones and cases. Teenagers haven't just created a new market, they've also created their own unique culture, "says Cheng.
除此之外，各式配件，如電話響時會閃閃發亮的感應器、耳機、皮套等等，年輕人使用行動電話不只帶動一個新興市場，也形成自己的獨特文化」，他說。