If you own an Android device, find four similarly outfitted friends and line up, shoulder-to-shoulder. Look to your left. Look to your right. Chances are, one of you has Lollipop, the latest Android mobile operating system. Twenty-one percent of Android devices use Lollipop, according to the company's own breakdown. This figure is up significantly from May, when Android reported just nine percent of its devices used the new OS. The largest share of the Android OS pie goes to Kit Kat, with 39 percent, followed by Jelly Bean with 32 percent.