After upgrade to 600Mbps, actual speed is 50Mbps
I recently upgraded from a 300Mbps plan to a 600Mbps plan and now my speed is terrible. On the 300Mbps plan I was getting really close to 300Mbps and now I am getting 50-80Mbps. I have tried rebooting the gateway. I am using new Xfinity equipment that was shipped when I upgraded. What can I do next?