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Ready to learn what your AT&T Smart Wi-Fi Extender (4921 & 4920) LED lights mean?

Then, you're in the right place! First, connect an Ethernet cable from any of the ports on the back of your Wi-Fi extender directly to your Wi-Fi gateway:

- If you get a solid white light, the pairing process has completed.
You can disconnect the Ethernet cable and place the extender in a new location.

- If you get a solid red light:
• Be sure you’re not connecting through a 3rd party router
• Make sure there aren’t any devices connected by Ethernet to your extender when powering on
• Be sure you have ordered Extended Wi-Fi Coverage service. Check your AT&T Internet service account.

Learn more about your AT&T Smart Wi-Fi Extender (4971) and all of our Wi-Fi Gateways & Equipment.

What do these Front Service LED colors mean on the AT&T Wi-Fi Extender (4921)?

Expand all

LED color	State	Meaning
OFF	OFF	No power. Make sure the Wi-Fi extender is plugged in and turned on.

LED color	State	Meaning
Green	Blinking Green	Ready to connect to your Wi-Fi gateway. First time connecting? Wait 5 minutes and follow the Wi-Fi Protected Setup (WPS) pairing guidelines.
Green	Solid Green	Connected to your Wi-Fi gateway.

LED color	State	Meaning
Green & Red	Flashing Green & Red	Connected but too far from your Wi-Fi gateway. Depending on your BB service speed move your Wi-Fi extender closer to your gateway.

LED color	State	Meaning
Red	Blinking Red (Slow Blink)	Lost connection or couldn’t connect through Wi-Fi Protected Setup (WPS). Move your Wi-Fi gateway closer and press the WPS button again.
	Blinking Red (Medium Blink)	Extender is resetting and may take up to 5 minutes to power on.
	Solid Red	Couldn't connect to the paired gateway or it's connected to an unsupported third-party router or smart device by Ethernet. Disconnect all Ethernet connections. Then, connect the extender by Ethernet just to your Wi-Fi gateway.

LED color	State	Meaning
Amber	Blinking Amber	Checking for updates. Don’t move the Wi-Fi extender or turn it off.

What do these Front Service LED colors mean on the AT&T Wi-Fi Extender (4920)?

Expand all

LED color	State	Meaning
OFF	OFF	No power. Make sure the Wi-Fi extender is plugged in and turned on.

LED color	State	Meaning
White	Blinking White	Checking for updates. Don’t move the Wi-Fi extender or turn it off.
White	Solid White	Wi-Fi extender has power.

LED color	State	Meaning
Green	Blinking Green	Powered on and ready to connect to your Wi-Fi gateway. First time connecting? Wait 5 minutes and follow the Wi-Fi protected Setup (WPS) pairing guidelines.
Green	Solid Green	Connected to Wi-Fi gateway for internet availability.

LED color	State	Meaning
Green & Red	Flashing Green & Red	Connected but too far from your Wi-Fi gateway. Depending on your BB service speed move your Wi-Fi extender closer to your gateway.

LED color	State	Meaning
Red	Blinking Red (Slow Blink)	Lost connection or couldn’t connect through Wi-Fi Protected Setup (WPS). Move your Wi-Fi gateway closer, and press the WPS button again.
	Blinking Red (Medium Blink)	Your Wi-Fi extender is resetting and may take up to 5 minutes to power on.
	Solid Red	Couldn't connect to the paired gateway or it's connected to an unsupported third-party router or smart device by Ethernet. Disconnect all Ethernet connections. Then, connect the extender by Ethernet just to your Wi-Fi gateway.

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