How do i activate my Xfinity account

How do i activate my Xfinity account

We will guide you through the installation and activation of your Xfinity gateway or a third-party modem / router that is approved for the Xfinity activate service.

If you are replacing a device that is already installed in your home, make sure to disconnect it before performing the following activation steps.

How do I activate my new Comcast Xfinity modem?

  • I have an Xfinity xFi gateway.
  • I have a different gateway or modem / router from a third party.

If you have an xFi gateway

The easiest way to activate an xFi gateway (Arris TG1682G, Cisco DPC3941T, Cisco DCP3939, Arris TG3482G, Technicolor CGM4140COM) is to use the Xfinity xFi app (download from the App Store or Google Play). To see which model you have, look at your gateway below.

If you are not prompted to activate after logging in to the app, go to MoreXfinity devicexFi gateway and follow the instructions.

If you don’t want to use the app for activation, go to the next section.

If you have another gateway or modem / router from a third party

To activate an Xfinity gateway or a third-party modem / router that is approved for the Xfinity service:

Note: These steps apply to both Xfinity devices and approved third-party devices. We suggest you to also look into installation guide for easy and best instructions.

  1. Place your gateway or modem
  2. Find the cable socket most centrally in your house.
  3. Place your gateway or modem in an open location away from exterior walls, metal surfaces, microwaves, and windows (do not place it on the floor). Avoid confined spaces and anything that can block the device signal.
  • Connect your gateway
  • Plug the power cord into the back of your gateway and then into an electrical outlet.
  • Screw one end of the coaxial cable into the Cable In / RF In connector of your gateway or modem and the other end into the cable wall socket. Make sure that this connection is hand-tight.
  • If you subscribe to the Xfinity Voice service, connect your phone to the Tel 1 connection of your gateway or modem using a telephone cable.
Wait for your gateway or modem to be ready- Comcast Xfinity activate new modem

It may take up to 10 minutes for your gateway or modem to be activated. Make sure that the lights appear as described below before proceeding to the next step. Do not pull out the plug of your gateway or modem during this process.

  1. If you have an Xfinity Gateway with multiple displays on the front, the Power, US / DS and Online displays should light up continuously for at least one minute and the 2.4 GHz and 5 GHz displays should start to flash.
  2. If you have an Xfinity gateway with only one light on top, it should stay white for at least a minute.
  3. If you have a third-party model, see the manufacturer’s instructions when your modem is ready to activate.

Xfinity internet activation – Establish a temporary internet connection

Next, you need to connect to the Internet using either WiFi or an Ethernet cable.

Establish connection via WLAN (if your gateway / modem supports a wireless connection)

  • Find the network name (SSID) and password printed on the side, back, or bottom of your gateway or modem. The name can look like HomeXXXX or XFSETUPXXXX.
  • Go to the WiFi settings of your WiFi enabled device and select the network name from the list of available networks. Enter the password when prompted. If you are prompted to enter a PIN instead of a password, click the Connect to security key link to enter the password in the Security key field.

Connect using an ethernet cable

  • Plug the internet cable into one of the open ports on your gateway or modem until it sounds click. Plug the other end into your computer’s Ethernet port. The Ethernet connector lights up when the connection has been successfully established.
Comcast Xfinity activate cable box

Activate your Xfinity gateway or modem

If you’ve made a temporary internet connection and don’t automatically see a welcome message to start the setup, open a web browser and go to Follow the on-screen instructions to check your Xfinity account and complete the activation process.

Note: When you have completed the Xfinity activation, your gateway or modem may restart. It may take up to 10 minutes before you can connect to your network.

Connect to your home network

After activation, connect your devices with your WiFi name and password for your home network if your gateway or modem supports a wireless connection. If you replaced your Xfinity Gateway and kept the same settings during activation, your previously connected devices should automatically reconnect.

  • Go to the WiFi settings of your WiFi enabled devices. Once your WiFi name appears in a list of available networks, you can connect your devices to your home network.
  • Select the WiFi name of your home network and connect with the password. If you changed this during activation, make sure you’re using the new one you set up.

Xfinity activation phone number

Note: Xfinity Gateways have an integrated Xfinity WiFi hotspot (xfinitywifi), the transmission of which can take up to 24 hours. For information about the hotspot, please call on the Xfinity activation phone number.( Source – Xfinity official)


To activate a new service line or replacement device, please go to the AT&T activation page or call Xfinity activate phone number. Important notice: The telephone service must be activated within 14 days after dispatch.

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