a Comcast compatible modem
buying Comcast internet without their modem. Need a modem wireless, for hole house use
Forget replacing the modem if all you want WiFi. All you need is a wireless router. If you don't own a modem buy one of those to, keeping in mind the cable companies are increasing there speeds and many of the current modems won't be able to take advantage of those speeds. Combination modem and wireless routers are easier to hook up and cheaper but you live with the danger of obselesence.