Starting on 06/26/2017, at the end of each day, I began logging the cellular data usage for each of my Apps and System Services in a spreadsheet. On 06/26 all the cellular usage was at 0-MB. On 11/26 the data was as such:
} Google (994 MB)
} Pokemon Go (625 MB)
} Uber (2754 MB)
} iTunes Acct. (115 MB)
} Messaging Services (241 MB)
} DNS Services (32.3 MB)
On 11/27 (yesterday), I started to input my cellular usage into my spreadsheet, and both Apps, and System Services, had reset to zero!!!
I did not do anything unusual to the iPhone.
What could have caused this "reset to zero" of my cellular usage logs (coincidentally) exactly 5 months after I started logging the usage?
I guess the logs can't go to infinity.
Actually, is this how cellular data logging is suppose to work on an iPhone?