First off howdy everyone! I recently had a friend sell me his Galaxy S3. He rooted it with something like Liquid Smooth i believe. I'm trying to unroot the phone and put it back to factory settings. How can this be done? I've tried the hold down power button, home button, and volume up button down at the same time and got to a menu. There I tapped on factory wipe i believe but after it powers up the root is still there. Please any info would be great.