On what device? 

Arris svg2482ac modem 

To update the Wi-Fi credentials on your SVG2482AC, please follow these steps:

1. Open a web browser and go to www.arris.com/consumersupport.

2. Select Surfboard Gateways from the list of products.

3. Scroll down to find the model SVG2482AC.

4. Click on FAQs to view detailed instructions on how to change your Wi-Fi network name and password.