Samsung, LG improve smartphone cameras, turn to virtual reality

South Korean tech giants Samsung Electronics and LG unveiled Sunday new smartphones with better cameras and turned to virtual reality to boost interest in their headsets at a time of slowing sales. Samsung launched two versions of its flagship phone, the flat screen Galaxy S7 and the curved screen Galaxy S7 edge, with cameras that can take better pictures under low-light conditions. The company, the world's number one smartphone maker, also debuted its first 360 degree camera, the Gear 360, in B