Then I hate to tell you but that device isn't new. 'Default' is a name of an IT Policy on a BES and the S78871124 is the SRP ID of that server it was attached to.
How long have you had it? If it's not been long, take it back to Sprint and tell them to give you a device that doesn't have an IT Policy on it (and show them that screen).
If longer then the return time, then you can remove the IT Policy yourself here: Remove IT Policy - BlackBerryFAQ