AT&T Wireless Internet (MF279)

Device help

Explore tutorials and more for your device.
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AT&T Wireless Internet (MF279)

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Something not working with your device?

Fix common service and device issues.

Learn all about your device

Want to get to know your device a litte better? Explore features, find out how to keep it safe, and more.

Learn more about your AT&T Wireless Internet (MF279)


Block calls

Block or unblock calls from your device.

Call forwarding

Adjust call forwarding options for your wireless number.

Conference calling

Add another person to your call, merge calls, place someone on hold and more.

Make & receive a call

This article describes how to make a call.

TTY support

TTY Support offers speech-to-text functions for the hearing impaired.


Check the wireless signal

The signal LED on your device indicates the current wireless signal status.

Connect a Computer

Connect a computer to the Router's network.

Connect a Wireless Device

Connect a wireless device to the Router's network.

Connect to AT&T Network

This article describes how to connect to the ATnT Network.

Connect using Ethernet

This article describes how to connect to the internet via Ethernet.

Connect WPS devices

Learn to connect a WPS-capable device to the ATnT Wireless Internet wireless network.

Connected devices

This tutorial explains how to view the different devices connected to your ATnT Wireless Internet.

Connection status

This article describes how to determine the connection status of your device.

Turn Wi-Fi on & off

Turn Wi-Fi on and off.

Wi-Fi network name & password

View and change the Wi-Fi network name and password for the ATnT Wireless Internet network.


About AT&T Home Base

Learn important information about your Wireless Internet.

Device assembly

Install and remove the SIM and battery.

Device setup

Set up your device for the first time or after having done a factory reset.

LED states

This article provides an overview of the LED states.

Power device on or off

Turn your device on and off.


This article details device specifications.


Find IMEI & serial number

View the device IMEI, phone and serial numbers.

Software update

Learn how to update the software of the AT&T Wireless Internet (MF279).

Software version

Determine your current device software version and check for updates.


Answering machine not picking up

Try this if your answering machine does not pick up incoming calls

AT&T Home Base Connection issues

Try this if you cannot successfully connect to the ATnT Wireless Internet.

Blinking red wireless service LED

This article describes what to do if the red wireless service LED is solid red.

Download or upload speeds are slow

Try these troubleshooting methods if you are experiencing sluggish internet speeds.

Internet access issues

Try these troubleshooting methods if your ATnT Wireless Internet cannot access the internet.

No dial tone

Try these troubleshooting methods if your ATnT Wireless Internet does not produce a dial tone when a phone is plugged in.

Phone not ringing

Try this if your phone fails to ring during incoming calls.

Reset device

Perform a factory reset to restore default settings on the device. Perform a factory reset if you have been locked out of access to your device settings.

Wi-Fi network not found

The Wireless Internet Network may be hidden, or you may be experiencing problems with your connection.


Access voicemail

Check your voicemail messages.

Set up voicemail or answering machine

Learn to set up and access the voicemail functions on your device.

More Topics



View and pay your ATnT bills online, manage your account, reset passwords, or upgrade your ATnT services.


Block & Unblock Wi-Fi Devices

Block and unblock Wi-Fi devices from connecting to the Router's network.

Hide Wi-Fi network name

Hide the Wi-Fi network name to limit the visibility of your network to nearby wireless devices.

Parental Controls

Learn to restrict and block websites to keep you and your family safe.

Wi-Fi security settings

This article describes how to enable wireless security.


Modem & router settings

This article describes how to access modem and router settings.

View APN settings

This article describes how to view APN settings.

VPN & DHCP settings

This article describes how to access VPN and DHCP settings.


About AT&T Home Base Manager

How to perform basic functions with the ATnT Wireless Internet using the ATnT Wireless Internet web portal.

Forgot AT&T Home Base Manager login

This article describes what to do if the ATnT Wireless Internet Manager login information is lost.

View call log

How to view incoming and outgoing calls to and from your ATnT Wireless Internet.