Three changes Apple could do to make iPhone Air 2 a hit

With iPhone Air 2 rumored to be less than a year away, Apple could turn to better cooling or more cameras to make the ultra-thin phone even more popular than the original. Here's what's been rumored, and some other possibilities.iPhone Air is a great phone, but the second-generation could be even betterDespite what some vocal online detractors say, iPhone Air…

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