According to a recent report published by Nikkei, it appears that Apple has already proceeded to letting its suppliers know that it is moving to cut its production target for its iPhone X by half during the first quarter of 2018. The tech giant was originally aiming to produce 40 million units of one of its 2017 flagship devices for the first three months of this year, but has since reduced that target to just 20 million units.
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https://www.wirefly.com/blog/news/report-apple-cuts-iphone-x-production-target-half