iPhone sales surge. Apple calls 2015 'most successful year ever' as outlook, profit pleases Wall Street

iPhone sales surge. Apple calls 2015 'most successful year ever' as outlook, profit pleases Wall Street

An iPhone 6 Plus is pictured as the Apple iPhone 6s and 6s Plus go on sale at an Apple Store in Los Angeles, California September 25, 2015. REUTERS/Jonathan Alcorn

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