A salesperson demonstrates the Apple iPhone 4 in New Delhi, India. While mobile device use is growing rapidly in emerging markets, Apple's current product line may prove prohibitively expensive for many consumers. Manish Swarup/AP hide caption

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In this Oct. 20, 2012 photo, people line up to enter a newly opened Apple Store in Beijing. Exxon has once again surpassed Apple as the world's most valuable company after the iPhone and iPad maker saw its stock price falter. Andy Wong/AP hide caption

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Steven Sinofsky introduces a new Microsoft tablet computer and Windows 8 software to the media in Shanghai on Oct. 23. The former president of Microsoft's Windows division has since left the company. AFP/Getty Images hide caption

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Apple announced Monday that two top executives who had presided over missteps at the company, including the Maps software, are leaving. Lukas Barth/dapd hide caption

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The new iPad Mini is displayed after its unveiling at an Apple event in San Jose, Calif., on Tuesday. Kevork Djansezian/Getty Images hide caption

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Tim Cook of Apple announces that Verizon Wireless will carry the iPhone in January 2011. Apple is expected to unveil its latest iPhone on Wednesday. Mark Lennihan/AP hide caption

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Attendees of Apple's 2012 World Wide Developers Conference look at the new MacBook Pro with Retina display. Justin Sullivan/Getty Images hide caption

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