How to securely root g2 phone (AT&T LGE LG-D800)?
I used towelroot to root my phone when I was still on a stock ROM. It worked well. There are many other alternatives available as well. I've had no problems with it, and it seems to be what I would consider to be the "safest" as it was designed by geohot, and I've used many of his products in the past.