The arrival of Moto X, the first smartphone developed by Motorola since being purchased in 2012 by Google, reflects Motorola's possible resurgence in the mobile-device industry. The new model illustrates the engineering and the challenges that the partners face on issues such as chip design and operating systems, Ryan Knutson and Spencer Ante write. Google is using Motorola's X8 chip system in the phone to make it more efficient. A less-expensive model of the phone will be introduced later, CEO Dennis Woodside said.
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