What you need to knowOnePlus wants mobile gamers to feel right at home with the Ace 6 Ultra, as its teasers showcase a handheld console-like case.The case features four buttons on its back, which users can customize to fit any controls within the game, such as aiming and firing in shooters.The Ace 5 Ultra also featured quite a heavy focus on gaming, as OnePlus equipped it with a trio of chips to do the heavylifting.China is anticipating the launch of the next OnePlus Ace series phone, and the company is fueling the hype by appealing to mobile gamers.Mobile gaming's been…