[KIOWA69]

What hboot does it have? You are going to have to give some more information, if he got it this past Christmas then it should have came with Gingerbread on it which means he rooted it with Revolutionary, we'll be able to get you back on a stock ROM but to my knowledge you will still be able to see that it was rooted if they (Sprint Repair if you had to get it serviced) if they really look at the phone.