[Biker1]

You can call Sprint regarding your usage and they may be able to tell you your usage.
You don't want any surprises.
The fact that you showed zero data usage previously yet know you had usage makes it seem that there is a discrepancy somewhere.
It would be great if you can have usage and have it show zero but I think they would catch it eveventually as it is too obvious.
Your bill showed zero data usage last time? Was that online and/or paper?