We started experiencing excess data usuage after enabling xfinity hotspots in June. We began being charged for overage. After reading other complaints I'm convinced that Comcast is double dipping. When hotspots are enable, other people can use your data because you become a hotspot as well.
I have now disable hotspots and we are back to what we were originally using for data.
No wonder Comcast encourages using hotspots. It's extra money for them!!
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