Apple router on comcast gateway
i just got a new comcast gateway with built in wifi, to replace my comcast modem and apple extreme . The gateway is terrible - it is slower, does not cover our house anylonger - heck I had to move it to the basement in the center of the house so our living room was covered. So much for issues, I want to buy a new apple router and replace the gateway wifi - will comcast let me turn off the wifi on their new gateway? I have Comcast TV and phone so I need it? Anyone else replace the built in wifi from Comcast with an Apple router? Thanks in advance for any advice!