https://thenextweb.com/insider/2019/08/01/comcast-hikes-up-the-price-for-hd-video-on-unlimited-plans/

Comcast-owned Xfinity Mobile will now charge subscribers an additional $20 a month to stream HD video. The change first started about a year ago, when it capped video resolution for mobile subscribers to 480p. Customers, until yesterday, could call in and ask that the limitation be waived at no cost.

For Xfinity Mobile subscribers, the bad news doesn’t stop there. The company also plans to remove the 480p streaming cap from its “by the gig” plans, an obvious nudge toward paying for each gigabyte used. In fact, the company dropped the price on these plans, charging customers $30 for 3GB of data instead of $36 as it had before. These caps are shared, meaning if you have multiple lines, each of the lines pools the allotted data.