By Olga Kharif and Stephen H. Wildstrom

iPhone's Latest Challengers

This may be the season of the smartphone. Already, about one in five Americans has one of these devices, which have a wider range of features than a traditional cell phone. Carriers and handset makers are intent on getting smartphones, which also carry higher price tags and pricier service plans, into the hands of more users this holiday season. Here's a list of some of the more prominent smart phones on offer before yearend.

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