If you’re a Comcast XFINITY Internet Customer, you can go to the website www.Comcast.com/deviceupgrade to request your new cable modem online.
How to request:
It’s very simple! Just open this website link www.Comcast.com/deviceupgrade and follow the instructions to fill out the request form with your Comcast Account Number and your personal information. Then Comcast will send you a new modem within 4-6 weeks. There is no need to pay any charge if you return your old modem within 30 days of installing your new modem.
Please note: You new cable modem includes a self-installation kit so that you can install it by yourself. If you would like to let Comcast personnel to install your modem, you need to pay installation fee.
Learn more from www.Comcast.com/deviceupgrade