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Why Apple Rival Samsung Also Wins If iPhone X Is a Hit

Smartphone titans Apple Inc. and Samsung Electronics Co. are arch rivals in one of the biggest consumer-product arenas.

But when Apple’s iPhone X debuts next month, both companies will be hoping it succeeds.

The twist reflects a love-hate dynamic that is one of the more unusual relationships in business. While each company vies to get consumers to buy its gadgets, Samsung’s giant components operation also stands to make billions of dollars supplying screens and memory chips for the highest-end new iPhone.

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