I know this is an older topic, but I have been exeperiencing the exact same thing. was paying for 250mbps, only got ~90mbps. 3 calls, 2 tech visits, and still no solution. So, I figured that if I was only going to get ~90mbps and there is no solution thehn that is what I will pay for. So I called to downgrade my service from 250mbps to 150mbps. Gues what, now I get 60mbps. Seriously, what is going on. Modem is brand spanking new, released 5.4.19 NetGear CM1200. Still no love.
Check your link, it is broken.
Post the requested info from here;
Mr_Locke, thank you for reaching out!
Sorry to hear about the speed issues you're running into. Are these speeds that you're getting over WiFi or are you hardwired directly to the modem?