Workers Inside The Pegatron Corp. Factory in Shanghai [Getty Images]

Employees make their way to the assembly line area after lining up for roll call at a Pegatron Corp. factory in Shanghai, China, on Friday, April 15, 2016. This is the realm in which the world's most profitable smartphones are made, part of Apple Inc.'s closely guarded supply chain. Photographer: Qilai Shen/Bloomberg via Getty Images

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