Activating a modem with Suddenlink internet service typically involves the following steps:

1. Unbox your modem and connect it to a power source.
2. Connect the modem to your computer or router using an Ethernet cable.
3. Turn on the modem and wait for the lights to stabilize. This can take a few minutes.
4. Open your web browser and enter the default IP address for your modem. This can typically be found in the modem’s manual or on the bottom of the modem.
5. Log in to the modem’s web interface using the default username and password. This can also typically be found in the modem’s manual or on the bottom of the modem.
6. Once logged in, navigate to the “setup” or “configuration” page.
7. Enter your Suddenlink account information, including your username and password.
8. Follow the on-screen instructions to complete the activation process. This may include setting up the modem’s network settings and configuring any additional features.
9. Once the modem is activated and configured, you should be able to connect to the internet.

It’s important to note that these steps may vary depending on the specific modem you are using, so you should refer to your modem’s manual or contact Suddenlink’s customer support for assistance with the activation process.

Additionally, it’s important to check with Suddenlink for the compatibility of your modem with their service, as not all modems will work with Suddenlink’s network. Suddenlink may have a list of approved modems that you can use with their service, it’s recommended to check their website or contact their customer support for more information.