Smartphone display keeping on growing Most adults are smart phone users. They are millions of smart phone sales each year. It has become so popular and is “growing in number and type.”(Zheng, 2006). On the street, in the elevator, at the coffee shop, everyone is staring into a smart phone. We can use smart phones to make calls, surfing internet and send messages. Smart phones are “next-generation, multifunctional cell phone.” (Zheng, 2006) be like a handheld computer but over these years, actually…
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