Samsung Electronics is reducing its mobile phone manufacturing in China in response to weaker demand. That’s extended a trend towards restructuring of phone supply chains which has seen Foxconn ponder a reduction in its Chinese operations and a move by LG Electronics to shift production to Vietnam. China’s global exports of mobile phones slumped by 18.5% year over year in the three months to Apr. 30. Chinese exporters to the U.S. also face the rising risk of across-the-board tariffs given. They accounted for 79.1% of U.S. handset imports in the 12 months to Mar. 31 despite an 11.8% decli...