Okay. I finally have my new 5S 
I purchased it at the Apple store. The box was factory fresh and sealed.
Cutting to the chase: After setting up the phone as a NEW device (nothing was restored from backup), I navigated to SETTINGS, CELLULAR and the Call Time was at 20 hours
I did a complete erase, and the timer was reset.
I went to the Apple store, and spoke with someone there who said he couldn't explain what would have caused this - even if the phone was pulled from the line for a quality check - he was stumped. He then ran the serial number, to see if the phone was associated with any other sale (a potentially returned/repackaged phone) and all that came up was my receipt. The second time he ran it, he showed me the result.
What does everyone think? Is this an anomaly? A used phone repackaged as new? A factory test?
I purchased it at the Apple store. The box was factory fresh and sealed.
Cutting to the chase: After setting up the phone as a NEW device (nothing was restored from backup), I navigated to SETTINGS, CELLULAR and the Call Time was at 20 hours
I did a complete erase, and the timer was reset.
I went to the Apple store, and spoke with someone there who said he couldn't explain what would have caused this - even if the phone was pulled from the line for a quality check - he was stumped. He then ran the serial number, to see if the phone was associated with any other sale (a potentially returned/repackaged phone) and all that came up was my receipt. The second time he ran it, he showed me the result.
What does everyone think? Is this an anomaly? A used phone repackaged as new? A factory test?