Not every plan on xfinity will allow for TV everywhere, I found this out the hard way. But, with my extreme internet needs, I still found them to be most economical for the cable stations I want. I then use my antenna where most of the TV I watch comes from with channels to keep my data lower.
But, it just wasn’t to be. I needed unlimited data so I paid the extra 15/month with the xFi advanced gateway to get unlimited data. The modem/router is sub-par, but it’s cheaper than the $50 a month for unlimited without their gateway.
I’m still saving, as the TV add on is cheaper than any of the other streaming services (especially if you want my regional sports) and I prefer the channels interface over many others.