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Apple's first foldable smartphone, the iPhone Duo, officially launched in Korea on Oct. 23, with SK Telecom, KT, and LG Uplus starting deliveries to preorder customers and general sales the same day, according to Maeil Business and Kyunghyang Shinmun. Starting at 3.29 million won, preorder initial stock sold out within one minute, raising supply shortage concerns. At Apple Myeongdong store in central Seoul, customers were seen examining the device on launch day. Korean materials supplier ICH Co. expects a sharp increase in demand for its components after the Duo drew strong launch demand, Business Korea reports.