Comcast is what I use as well and they are snakes. They throttle my bandwidth at the tail end of the month all the time. My connection also sucks because I bought my own router that has the same tech as theirs, but I don’t rent from them. They refuse to upgrade the firmware of my router as well, I’m 3 updates behind. I’ve looked it up numerous times and I’ve read that Comcast is the only one who can and mostly everyone has the same complaint, they don’t upgrade.