What speed are you trying to upgrade to? I just upgraded to Blast, my own modem, and kept my Cablecard. To be honest, with Peacock only available on X1, and the different channels and new channels being offered on X1, I just ordered an X1 4K DVR to go along with my Tivo and minis for an extra $15 per month. I figured I would try that out for a year until my contract is up for renewal, and decide at that time if I want to switch to AT&T fiber they just laid in front of the house, and DirecTv. I am kind of peeved Xfinity offers 4K boxes, and then reduce the resolution from 1080 to 720 on all channels. At least DirecTv keeps the channels at 1080i, and offers a couple 4K channels.