inspire 4g restore?

[dusscolav1]

I have recently bought an At&t Inspire 4g off of Craigslist. I return home to find out that the phone is rooted. Im a noob to this, it displays a cyanogen icon or something. Im trying to restore the phone to its original settings for my girlfriend. Plz help

 

[sphinx23]

Look in the sub forums in the Samsung Infuse froums,I remeber awhile back that one of the advisors made an poston how to root and unroot your Infuse.I don't mind having an rooted phone cause I can tweak it to the way I like it and install custom ROMs on the device