Modem replaced by Comcast about a year ago on an upgrade suggestion by them. Speeds stayed the same as before. Length of time of increased sppeds after area service repairs shows that the advertised speeds are capable of being delivered. The rest is pretty easy to figure out. Just waiting for a better option to enter the area to try to get what's promised and what I pay for. As I said even Comcast has checked everything out technically and said connections are correct. Personally I'm at wits end with them.