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.
t’s inevitable: you have either broken an iPhone in some way or know someone who has. The tradeoff for Apple’s impressive mixture of glass and metal is that the company’s smartphones (and tablets for that matter) can be rather fragile. Under the right circumstances the iPhone 5 can take a drop like champ, but if the angle is wrong or if the smartphone lands on something unforgiving (like concrete or tile) you’re in for an expensive repair. Many of us, anecdotally, have learned that the iPhone 5 is especially expensive to fix but a recent report has dug deeper into this phenomenon.