How to safely unroot my Lenovo K3 Note? I've rooted my Lenovo K3 Note using SuperSU, now due to some reasons I need to unroot my cellphone. How do I do that?
Download Supersu app from playstore

Launch the SuperSu APP that you just installed on your device.

Goto the settings and find Unroot option . Tap on it . 

you have unrooted your phone congrats.