I've had the same issue. I've been on the phone with xfinity for over half an hour. I have a modem and router that tracks actual data usage. It shows 1 GB. Xfinity shows that I used 50 GB overnight. All they tell me is that my information is inaccurate, and xfinity's is correct. I've been a customer for a very long time and getting close to no longer being one. It is a scam. When I signed up with them almost 20 years ago, there was no data cap. There was no way that I'd get near 1 TB of usage. Now it's over a TB or close almost every month, especially toward the beginning and end of month, it spikes. I've found that everytime that they are in the area doing "improvements", I have data spikes. The customer service rep told me "since they are improving to make it faster, you will use more data." What kind of correlation is that?
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