In this application will help you how to use an application called KingRoot Mobile. an application made khusu to do Rooting on Android devices. Not only Kingroot can perform rooting on Android devices, but still much more to do, such as RootGenius, IRoot, MobileGo, Kingoroot, One Click Root and SRSRoot, these tools are designed to perform multiple functions seperting Rooting, Flash ROM, Flash kernel, Remove Ads in Apps, Booster Device, Remove bloatware, Unlock Screen, Download ROM and others.
Some Tools above require a PC to where they walk, if you do not have a PC, you can do Rooting on Android devices you without a PC, an application that you can use for rooting Without PC is 360Root Mobile, IRoot Mobile, RootGenius Mobile, Key Master Root, TowelRoot and FrameRoot
For how to use Kingroot please you can download this application directly.