Find Wi-Fi Network Name & Password
You will need your Wi-Fi network name and password to connect all your Wi-Fi-enabled devices.
Network name: This is the word "ATT" followed by the last three digits of the gateway serial number ("SN").
Network password: This is a 10 or 12-digit number located in brackets ("[ ]") or labeled "Wireless Network Key" located on the bottom or side of the gateway.
Note: If you are a Mac OS X user, you may need to enter the "$" character at the beginning of your Wi-Fi network key.