Samsung appoints new head for mobile business

Samsung Electronics has appointed D.J. Koh, head of mobile research and development, as the new chief of the company's mobile communications business.The move follows some setbacks in Samsung's mobile business during the tenure of the former head J.K. Shin, including an underestimation this year of demand for the Galaxy S6 edge, while overestimating demand for the Galaxy S6 with a non-curved screen.Samsung said Tuesday that Shin and another co-chief executive officer would step back from day-to-