The ARRIS Surfboard T25 does not have a built-in router or Wi-Fi. It is a standalone cable modem with voice support, meaning you must connect it to a separate external Wi-Fi router to create a wireless home network.
Device OverviewType: Standalone DOCSIS 3.1 cable modem (no router functions)
Wi-Fi: None includedPorts:
Two 1-Gigabit Ethernet ports and two telephone (telephony) ports for digital voiceCompatibility:
Certified specifically for Xfinity Internet and Voice services
I never wanted to pay for Xfinity modem / Router at $14.00 a month for life (Plus constant increases) I connected my own Wifi Mesh router to cover my whole house area. I used the phone for a landline and one for security.