A:AnswerI use it with Comcast as well and you will call them to set it up. Shouldn't take more than 10 - 15 minutes. Not sure it will support their fastest speeds. I have 100mb download speeds and it works fine for gaming and streaming.
A:AnswerContact your internet service provider. So long as they support DOCSIS 3.0 modems, you shouldn't have any issues. But, again, CHECK WITH THEM FIRST for compatibility verification.