Beware that Comcast Xfinity has the malpractice to charge you for rental fees every now and then, even though you own your modem, therefore those customer that own their modem and aren't paying attention to their monthly bills (auto payment or charge to credit card) do not notice it and get billed the extra fees. They always find a way to mess up your billing to have you to call them and request a "change to your services" thought their nice customer service waiting phone touch tone nightmare.