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iPhone 4s - Wikipedia
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Apple iPhone 4s - Full phone specifications
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2012, The Next iPhone, And LTE - MacStories
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iPhone 4S review - The Verge
iPhone 4S review - The Verge
iOS 5.1 Adds '4G' Indicator to iPhone 4S Status Bar for AT&T HSPA+ Coverage - MacRumors
Apple iPhone 4S (Black, 16GB) : Amazon.in: Electronics
iPhone 4S buyer's remorse in South Korea over hardware issues and lack of 4G LTE - 9to5Mac
HTC EVO 4G LTE vs. iPhone 4S Speed Comparison - YouTube