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

Employees look into facial recognition devices to enter the assembly line area 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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