first of all, using smartphones is expensive. the expense includes the price of smartphones as well as the fee for multi - applications. high technology and brand name also add a lot more payment
secondary,excessive use of smartphones can affect users physical health. for
lastly, using smartphones can be time consuming. people who are addicted to smartphones may spend too much time chatting and sharing information with friends enjoy multiple functions for entertaining themselves
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A preliminary teardown of the iPhone 5 shows that the most expensive iPhone this year is cheaper for Apple to make than the iPhone 4S.