1,download 360 onekey root tool and install it in your PC, https://www.dropbox.com/s/bndk56qmvbb5v2i/360RootSetup.rar
2,open "usb debug" and "unknown sources"
3,connect your smartphone with your PC, run 360 onekey root
4, it is rooted if you can see SuperSU in your smartphone.
