https://www.cnet.com/news/lg-shows-off-three-new-midrange-phones-at-mobile-world-congress/ > All three also have a dedicated Google Assistant button and sport DTS:X 3D Surround Sound, a high-end audio technology that simulates a 7.1-channel surround sound system. The Q60 and K50 are powered by a 3,500mAh battery, while the smaller K40 is outfitted with a 3,000mAh battery. > The big differentiator among the phones is their camera setups. The Q60 and K50 both feature 13-megapixel front-facing cameras, but the Q60 has three cameras on the back. There's a 16-megapixel camera with Phase Detection Auto Focus (PDAF), a 5-megapixel  for Super Wide Angle, and a 2-megapixel shooter with Depth Sensor.