I think the nightly batch process is something they're just saying to explain the early-morning data transfers. I would be inclined to agree, if they're weren't also data transfers being timestamped throughout the day prior.

The early morning transfers have ranged from relatively insignificant to HUGE. Like 400,000KB.

Basically all of the early morning transfers were unaccountable to me, but she gave me the explanations I listed in my first post. Even if it were push notifications or pushed email or apps running in the background (none of which are true), it still doesn't explain why all of the sudden there are overages if I'm not using the phone any differently than I had been?

And after downloading the data tracking app, I can definitely itemize data that was recorded by AT&T that was not by the data tracking app.

I'm not sure what to do at this point, because I just get the canned excuses, even though they've been proven wrong. And in every forum I've found on this subject, each person has posted the exact same canned responses that they received. [Per Guidelines:  Keep it Relevant and Appropriate].