question on a dead 6700

[gbh468]

hello there i had went to an county auction and i bid on a box of stuff and won and in the box was a 6700 i called sprint and they told me that the phone was stolen and could not be activated so i called the insurance which released the phone to sprint but now sprint still says that they cant turn on the phone since they cant find the esn number so my question is is there a way to get this phone turned on or change the esn number please reply