Andrew said that there isn't,
There is actually a DATA CAP monthly. if you have alot of kids which they stream alot, play video games, or you guys watch alot of streaming services like, netflix or amazon prime etc, it consumes alot alot of data. Xfinity says that only 90% of customers goes over 1Tera a month, which is the maximum data per moth, This years i went over like 5 times, used around 1500 GB or more monthly, Mind that a netflix movie in 4K is around 50GB, 10-20 movies that you watch in a moth at 4K , that's it your data is gone. unless you PAY an extra $50 to get unlimited.