Nexus Root Toolkit v2.1.6 Unlocking, rooting, relocking and unrooting simplified! (and much more!) VERSION 2.1.6 – This program will automatically bring together all the files you need to unlock and root your device in a few clicks, or flash it back to stock and re-lock it. You can also use this program to backup/restore all your important data, flash zips, set file permissions, push and pull files, install apps, generate logcats/bugreports, and much more!