Rebooting your router is a common quick fix for Wi-Fi connectivity issues. To reboot your router, press and release the Reset button on the AT&T Wi-Fi Gateway router and wait for it to power back up. You can also try unplugging the router, waiting five seconds and plugging it back in.
To reset your AT&T Wi-Fi Gateway router, press and hold the Reset button for at least 10 seconds.
*Important note: “resetting” your router may return it to factory settings. If you want to restart your router but keep any custom settings, try first to reboot the router, not reset it. Otherwise, make note of any custom settings before performing a reset so you may reapply them once the reset is complete.