I just upgraded from 265mbps to 600 mbps a couple days ago. It took effect yesterday (allegedly). I ran speed tests before and after and there was virtually no change. I updated my modem today and this new one is rated at 686mbps vs the 300mbps I had before.
My connection speed is now 37.6mbps.
When I try to troubleshoot and reset my modem, It shows the serial number of my old modem. The setup I went through never prompted me to add information about the new modem. It just asked to verify my phone number and then sent me a text with a code to verify it was me.
There used to be a portal in which I could enter the information for my new modem, but there is nothing like that (at least that I can find) on Xfinity's site. Chat is absolutely worthless (when it actually connects).
How can I get Xfinity to recognize my new modem? Why am I paying for more speed, but getting even less?