LG One Click Root 1.3Free
This program allows you to root a variety of LG mobile phones. This application should work on any LG G3 official firmware (4.x.x / 5.x.x), and on other models too. You must connect your phone to your PC and enable USB debugging on it. This program is quite easy to use; simply click start and it will begin the process with a verbose log showing the real-time status.