So my first android phone was a Droid X, which I rooted and ROM'ed. So now I'm on my third android phone which is a Droid Razr and as I was looking at my apps I noticed the superuser app on this phone. This phone was previously owned but the guy did a factory reset when he handed it over. I have visited the play store since but am pretty sure that I didn't install this from my apps. Question is how can I tell if this phone has root acces already? I have personally not done anything to root this phone. Thanks for any info.