2014年4月2日 · Probably one of the most sought after features of the LG G2 is its "Knock Knock" capabilities. Rather than dealing with that pesky power button, you simply double-tap portions of the screen to either sleep or wake your device. The G2 is the Nexus 5's bigger brother of sorts, as it was developed by the same manufacturer at the same time. Aside from a slightly larger …