I bought an HTC EVO 4g from a friend and I have a question that should be able to be answered easily

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http://androidforums.com – Thank you for taking the time to check out my thread. I bought an HTC Evo 4g from a friend of mine. I've got it completely set up with all of my information and it's working perfectly. However, his name is plastered all over the lock screen and call screen. It's in the middle of the lock screen on the slide to unlock portion and in the upper left hand corner of the call screen. I've searched all over the phone to see where I can change this, or just plain erase it, but there's no obvious options to do so. I've also done a factory data reset on it in attempt to allow me to put in my own info (General)