Samsung Electronics has started its latest round of telecoms product upgrades with the Galaxy Note 10 large format phone. The introduction comes as there are signs of a continued slowdown in the smartphone industry. Exports of phones and network equipment from China and South Korea fell 9.4% and 34.9% year over year respectively in July. That decline is partly due to a shifting of production to Vietnam – U.S. imports from Vietnam surged 74.6% higher year over year in June, while those from China and South Korea fell 2.3% and 59.4%. The challenge for Samsung in the U.S. – a...