Clearly the smartphone now has three segments: small screen, medium screen, and large screen. iPhone 5 is an example of a small screen, Samsung Galaxy SIII and Nokia Lumia series as well as BlackBerry Z10 are examples of medium screens, and Samsung Galaxy SIV and Samsung Note II are examples of large screens.

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Right now, live programming from cable or satellite channels are the dominant medium for our big screen televisions.

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But the BlackBerry doesn't handle lengthy e-mail any better than the Palm VII--its smaller screen transforms even medium-length messages into marathon scrolling exercises.

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