Amazon.com Inc., seeking to build on its expansion into e-readers and tablets, is working on a smartphone that will go on sale in the fourth quarter of next year, according to Citigroup Inc. The phone will be a mid-range device that uses a processor from Texas Instruments Inc. and connectivity chips from Qualcomm Inc., said Mark Mahaney, a San Francisco-based analyst at Citigroup, citing research by Asian colleagues. The total list of components won’t exceed $100, he said.
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