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Change WLAN channel: This is how you select the appropriate radio channel

In this tip we will tell you how you can change the WiFi channel on your router and why this can be useful.

With current standards, wireless LAN achieves data rates that would otherwise only have been possible via a wired connection. Nevertheless one can Wrong WiFi channel ensure that the WiFi connection is too slow. In the following tip we describe what a WiFi channel is and when to use it Change WiFi channel should.

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1. Wireless LAN transmits on a frequency in the 5 GHz or 2.4 GHz band

Wireless internet facilitates the networking of mobile devices such as tablets, smartphones or laptops and is also supported by many stationary devices such as PCs, game consoles and smart TVs. Thanks to modern WLAN standards such as IEEE 802.11ac (WLAN AC) or IEEE 802.11ax (WLAN AX), data rates up to the gigabit range are at least theoretically possible today.

Together with functions such as Mesh or FRITZ! Box Mesh or reinforcement with a WLAN repeater, optimal WLAN reception is possible anywhere in your own apartment or house.

Still it can slow connections come when too many routers are broadcasting on the same channelwhat can happen quickly in urban areas, for example in an apartment building. In this case, you should change the Wi-Fi channel to get the best performance for Wi-Fi.

More tips and tricks for everything to do with WiFi: In our article "Boosting your WLAN signal: Tricks for increasing the router range" you will find more tips to improve your WLAN.

2. What is a WiFi channel

The radio data are transmitted on different channels. In Europe, 13 channels are available for the 2.4 GHz frequency band, each 5 MHz apart, ranging from 2.412 to 2.472 GHz.

To ensure trouble-free operation, the channel used should be at least three channels away from other WLANs. This results in only four non-overlapping channels: 1, 5,9,13.

Channels 1, 6 and 11?: The recommendation to use channels 1, 6 and 11 in the 2.4 GHz band dates back to the times of 802.11 b and routers that could only use channels 1 to 11.

Occupied channels in the 2.4 GHz frequency band with a FRITZ! Box

In the screenshot, the FRITZ! Box uses channel 11 for transmission in the 2.4 GHz band.

In the frequency band 5 GHz, however, 19 non-overlapping channels are available, but not all of them are approved in Europe.

Occupied channels in the 5 GHz frequency band

3. Under these conditions you should change the WLAN channel

While more non-overlapping channels are available in the 5 GHz frequency band due to the larger frequency range, the 2.4 GHz frequency band offers little leeway. Frequencies from other routers and WiFi repeaters in your area are used very quickly.

Modern routers try to decide for themselves which channel is the best choice for each frequency band with the "Auto Channel" setting. But this does not always have to work. If you have a very slow WiFi connection despite good reception, you should check the channels used.

3.1. Display of used WLAN channels

Many WLAN routers not only show which channel is used by the router on the web interface in the browser, but also all other WLAN stations found in the vicinity.

Occupied WLAN channels

If your router does not offer such a display, programs under Windows or apps on the smartphone can help.

For Windows, for example, the free programs Homedale WLAN Monitor and inSSIDer Home are able to display occupied frequencies in a graphic.

Homedal frequency usage

While you have to switch the frequency band at Homedale, shows InSSIDer switches both frequency ranges on at the same time.

InSSIDer is also available for the Mac

There are also numerous free tools for Android that can scan for occupied WiFi channels. With FRITZ! App WLAN, AVM itself offers a free app with a graphical overview of all WLAN signals in the vicinity.

Fritz! WLAN shows occupied WLAN channels

The app is also available for iOS. However, Apple prohibits "WLAN scanners" so that the practical function is missing here.

4. How to change the WiFi channel

Therefore, for optimal operation, you should have a Select the WLAN channel for both frequency bands, which in the best case can be used free of interference from other WLAN stations.

If the router makes the wrong choice here, you can very easily change the channels in the router manually.

4.1. Change the WLAN channel on the FRITZ! Box

The popular FRITZ! Box router from AVM offer in the settings under WIRELESS INTERNET ACCESS->Radio channel the ability to change the radio channel. The standard setting is automatic.

Change the WLAN channel on the FRITZBox

click on Adjust radio channel settings and adjust the radio channel for the 2.4 GHz and 5 GHz frequency bands separately.

Change WiFi channel

4.2. Change WLAN channel on a Speedport router

Also the Speedport models from Telekom offer the option of setting the WLAN transmission channel. For the model Speedport W724v, for example, there is a setting under Basic WLAN settings -> Send settings.

Change WLAN channel at the speed port

In the section channel you can change the channel to be selected for both frequency bands from automatic to manual value.

Set the WLAN channel at the Telekom speed port to a manual value

4.3. Change the WLAN channel on the Vodafone EasyBox

To get to the EasyBox from Vodafone To change the WLAN channel, switch to in the button bar in the header WIRELESS INTERNET ACCESS and here then on the left in the section Settings. There you can set the Auto channel to a manual value for both frequency bands.

Easybox Vodafone

You can get a visual explanation of the WLAN problem in the following video:

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Change WLAN channel: This is how you select the appropriate radio channel
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