[sjrickli7]

Not sure if this helps. But i purchased a phone from ebay as well. It was registered under a different name (which later i found out myself)
just click start->settings->system->device information-> under current username check if its your account. Cuz mine said michaelsomething@sprint which wasn't me. Bring the phone to a sprint corporate store and let them know about this, they will change it to your username and have them reactivate it (all should work afterwards). If you had already solved the issue then just ignore it i didn't really read further into it long day.