I upgraded to Extreme 250 in October 2015 - was getting the full speed on my own model (Arris TG822G) just fine. Downloads, speedtests were confirming the speed.
However I noticed in the last few weeks, I am now getting speeds of much less than that - often times even below 100Mbps and it has not recovered. I also got an email from Comcast saying that it's time for me to upgrade my modem because new equipment is available.
I dont' want to rent one because it was working fine before and I need one that has telephony since I'm on the triple-play packages.
Does anyone know if Comcast changed their technical requirements so that 250Mbps service requires 16x4 DOCSIS 3.0 modems instead of the 8x4 one that I have been using successfully for the last several months?