IPhones have been with us for awhile now in several different models, and they've opened up a new world of applications for smartphones. Answer these questions to test your knowledge about these headline-grabbing devices. Keep track of your score so you can find out at the end how well you did.
Other quizzes:
Wireless networks and mobility quiz
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CIO.com's Al Sacco turned to the Twitterverse in search of the best lightweight and unobtrusive, yet protective iPhone 4 cases. Here are seven Apple-smartphone cases that fit the bill.
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