Since you have the VOIP option you can only use models that Comcast will bless. If you only need WiFi then add a WAP (Wireless Access Point) or use a router as a WAP. Google has plenty of articles on using a router as a WAP.
I am ready to buy a replacement for the modem router that we have been renting for 3 years. We have triple play - VOIP internet and cable tv. We have one telephone line (can't get my partner to cut that cord!), we watch comcast station plus stream netflix and amazon (roku) We use the wifi quite a bit. Our needs are simple and we, I must presume do not need a lot of speed. I think comcast has our set to 150mps which works fine most of the time. We have a TG1682G that we are renting.
Since I am not that hi tech, it confuses me when I see all the options on Amazon. What device will do what I need that I can purchase online?
Thank you in advance!