All routers are compatible with Arris modems. If it is an extender, it needs to connect with the router to access the Wi-Fi.

Arris supports only the retail products that are available on surfboard.com but not the ISP lease products. Please contact your ISP for further assistance.

The BGW210 from att is a gateway device. If you switched to spectrum and are using the SB6120 for the connection to spectrum, you could check on the ATT forums if theres a router only option fro the BGW210