How do I change my AT&T wifi router channel?

You may experience weak or dropped signals if say a cordless phone and Wi-Fi gateway share the same frequency channel or if two gateways sharing the same frequency channel are located relatively close to each other.

A potential fix for this issue is to change the channel, thereby reducing frequency interference. The steps below show how to check which channel you're currently on and which channels are available for you. Trial and error testing may be required to find the right channel for you.

1. First you will need to gather some information in order to access and make changes to your router. You can locate the information needed on the sticker on the side of the modem. You will need the following info. Device Access Code and the IP address listed under For Advanced Device Configuration (should look like 192.168.1.254).
   
   
   
2. Open a browser (such as Internet Explorer, Firefox, Chrome or Safari) and in the address bar, type http://192.168.1.254
   
   
   
3. Select Wireless.
   
4. Scroll down to Network > Wireless Channel. From here, you can change the wireless channel. You want to pick the one with the least amount of interference. It may take some trial an error to determine an optimal connection.
   
   
   
5. After you have selected the appropriate channel please ensure to click the Save button at the bottom of the screen.
   
   

-ATTU-verseCare

what problems may arrise from changing the channel on the router?

Change it and find out for yourself in your specific environment how channel changes affects your wifi.  It will either work, not work, or partially work (sometimes).  You can't hurt anything by experimenting.  You can always put it back to what it originally was (auto).

Step 2 seems to be incomplete, but thanks for posting this!

Step 2 says to type, then has a pic, but doesn't say what to type. Please update these instructions. Thank you. 

Most of the time, typing 192.168.1.254 should work on AT&T Wi-Fi.

None if you put it on Channel 3, 7 or 9.

Usually everyone is always on auto which kills the router anyways

I thought that the choices were supposed to be between 5GHz and 2.4GHz but that seems not to be the case, or am I missing something?

The router interface has changed slightly from 2015 to 2020. Now, you go to Settings> LAN > Wi-Fi. Then, a little ways down the page, select Advanced Options. This opens up a new menu. Now, under both the 2.4 GHz radio and the 5 GHz radio sections, you can change the wi-fi channel from Auto to a specific number. After changing, click save at the bottom of the page. Test your devices. If you still are having trouble, try a different channel.

SkippyATL: do we need to use two different channels for 2.4 and 5GHz or can they be the same channel? I bought a Galaway wifi extender that works great for about 8 hours and then it seems to disconnect from the interent (happens about every day). The wifi networks show up but if you connect you won't have an internet connection. After I restart the router (via unplugging) the Galaway wifi networks start working again (i.e. internet works). The Galaway instructions say to change the channel of the router to channel 11 but I'm not sure if that means for both 2.4 and 5GHz. Any ideas?

Hello @corinneb

Not knowing the specifics of the Wi-Fi extnder, does it support 5 GHz?That would be something to check into. It's confirmed that some extenders depending on model, may only support 2.4. Check that prior to any specific RG configurations. 

Since the problem appears to be relating to the extender, access the extender Interface and confirm the latest firmware. Usually if new firmware is available, there would be an alert to update. If there is a firmware update to take place, after updating, reset the extender and wait for a boot up. It's possible that you may need to reconfigure. 

If the extender is compatible for both frequencies, a dual band RG is capable of receiving and transmitting both 2.4 and 5 GHz at the same time, therefore any recommended channel setting from Galaway would be recommend. 

While we don't technically support 3rd party devices, we're always glad to assist you with any AT&T hardware related questions issues. You're in a good spot to get support from other users as well. Let us know if we can be of further support. 

Chad, AT&T Community Specialist.