No, no "errant software" running in the background, no viruses. I've had several conversations with Level 1, 2 and 3 support people, all with no resolution. I've moved to xFi which relieves the problem of exceeding data limits but does not solve the problem of excessive data usage.
Last night, for instance, while I was asleep, my Macbook was in sleep mode, my iPhone was not in use and with no background updates occurring, I consumed 44 GB of data. Using the Comcast data usage estimator, that usage represents more than 24 hours of streaming music, almost 48 hours of gaming, an hour of Netflix HD. How does that happen *overnight*?
I do have an iPhone XS Max which has had some complaints of too much data usage but I shut background updating and location services to virtually every app off. Yet still Xfinity records enormous uses of data. I am at a complete loss on how this is happening. Luckily, an Xfinity hardware upgrade has at least taken the financial penalty (aside from the extra $10/month for xFi service) off the table.
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