I had an 12 old wireless Motorola cable modem on a comcast system. My speeds were terrible and getting worse. I installed a multi speed NETGEAR cable modem with a NETGEAR smart WIFI router. I went from 45 Mbps down load and 4 Mbps upload to 478 Mbps download to 11 Mbps upload. I have 12 devices on the system now and still super fast.