There seems to be a real problem lurking around the iPhone5 cellular/WiFi functionality.
Are you reading 83 and 253 KILObytes or MB?
I am showing Cellul;ar Network Data sent 27.5 MB and Received 440 MB in a matter of hours.
Nowhere near the contract limit but why is it there when cellular is locked off? And has been since I noticed a problem and went to the forums last week?
Mucho problemo reported according to the URL above.