For a nandroid, @zixxorb is corredt, you don't need root. What you need is a custom recovery. The instructions for installing can be found here ... http://lgg3root.com/cwmtwrp-recovery/
Be advised, that these kinds of operations can have disastrous results if not performed correctly AND you must assume all the risk when doing it. Attempting this with a phone that has been compromised is exponentially dangerous. Please read and understand EVERYTHING before you attempt this.
Also, I don't know if your mouse will work in recovery. Most recovery utilities are controlled with the buttons , not the screen, not having a working touch screen might be a problem.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.