In modern conditions of using wireless technologies, router owners often face a situation where it is necessary to forcibly change the network operating frequency. Standard 802.11ac, operating in the 5 GHz band, provides high speeds, but not all devices support this frequency range. Older laptops, budget smartphones, and many gadgets from the ecosystem smart home can operate exclusively at 2.4 GHz frequency.
This is why there is a need for manual equipment configuration for band switching or band separation. This process is not complicated, but it does require attention, as firmware interfaces vary from manufacturer to manufacturer, such as TP-Link, Asus or MikroTik, may differ significantly. In this article, we'll detail the steps you need to take to change the radio module's configuration.
Before making any changes, it's important to understand that switching to 2.4 GHz may reduce your maximum data transfer rate, but it will increase your range and signal penetration through walls. Dual-band router allows you to flexibly manage these parameters, creating optimal conditions for each connected device in your local network.
Why devices can't see the 5 GHz network and is a switch necessary?
The main reason why users are looking for a way to switch to 2.4 GHz is simple hardware incompatibility. Many devices Internet of ThingsDevices such as smart plugs, motion sensors, or robot vacuum cleaners are equipped with simple Wi-Fi modules that are physically unable to receive signals above 2.4 GHz. If your router is configured for 5 GHz only or has combined networks under a single name with high-frequency priority, the device simply won't detect the access point.
Furthermore, the 2.4 GHz band has better penetration. Its signal attenuates less when passing through concrete floors and brick walls than a high-frequency signal. If your device is located in a distant room or behind a thick partition, switching to a lower frequency band may be the only way to ensure a stable connection without using repeaters.
⚠️ Please note: When switching to the 2.4 GHz frequency, you may experience interference from neighboring routers, microwave ovens, and Bluetooth devices, as this range is heavily congested in apartment buildings.
Also worth mentioning is the function Smart Connect (or similar names from different vendors), which automatically switches the client between frequencies. Sometimes this function malfunctions, locking the device to the weak 5 GHz signal instead of the strong 2.4 GHz. In such cases, manually separating the networks or forcing the router to switch to 2.4 GHz mode is the only reliable solution.
Preparing for setup: accessing the admin panel
To make any changes to your wireless network configuration, you need to access your router's web management interface. This can be done from any device already connected to the network, whether it's a computer via cable or a smartphone via WiFi. Open any browser and enter your gateway's IP address in the address bar. This is most often 192.168.0.1 or 192.168.1.1, however, the exact address may vary depending on the model.
After entering the address, the system will request authorization. You'll need your username and password, which are usually found on a sticker on the bottom of the device. If you've previously changed these details and have forgotten them, you'll need to perform a factory reset, which will completely erase the current configuration.
Admin panel interfaces vary from manufacturer to manufacturer, but the general logic remains consistent. Navigation is via a menu on the left or top, and key wireless network settings are often located in a separate section.
☑️ Preparing to set up your router
It's important to ensure a stable connection during setup. If you make changes to WiFi settings while connected to a wireless network, you may lose connection to the router while the settings are being applied. Therefore, experienced administrators prefer to perform such operations by connecting a computer via LAN cable.
Setting up bands on TP-Link and Asus routers
The company's routers TP-Link have a fairly logical menu structure. After logging in, go to the section Basic setup or Advanced, then select Wireless (Wireless Mode). Here you will see two subsections: 2.4GHz And 5GHzTo switch the device, you need to find the radio module on/off option.
In new interfaces TP-Link with support Smart Connect Everything can be combined. You'll need to go to the wireless settings and uncheck "Combine 2.4 GHz and 5 GHz." This will open separate settings for each band, allowing you to disable 5 GHz or simply set different names (SSIDs) for the networks.
Devices from Asus use an operating system ASUSWRTIn the menu on the left, select a section Wireless networkAt the top of the screen, you'll see tabs for 2.4 GHz and 5 GHz frequencies. By switching between them, you can activate or deactivate the radio module, as well as change encryption settings and channels.
What if there is no 5GHz off button?
Some firmware versions don't have a clear power button. In this case, simply change the network name (SSID) for 5 GHz by adding the suffix "_5G" and leave the default name for 2.4 GHz. Then connect to the network on your device without the set-top box.
Don't forget to click the button after making changes. Save or ApplyThe router may reboot the wireless module, temporarily interrupting the connection. This is normal hardware behavior.
WiFi Configuration on Xiaomi, Keenetic, and Zyxel Routers
Chinese manufacturers such as Xiaomi (including sub-brand Redmi), often use simplified interfaces accessible through a mobile app or web version. In the web interface, you need to go to WiFi settings. A switch is often found here. Dual Band or "Merge Bands." Disabling this feature will allow you to manage frequencies separately.
Routers Keenetic (previously Zyxel (in the Russian Federation) are famous for their flexibility. On the menu My Networks and WiFi You can configure each network in detail. Feature Keenetic The ability to create guest networks and isolated segments for different bands is available. To force the switch to 2.4 GHz, simply uncheck "Enable" in the 5 GHz network settings.
Interface Zyxel (international versions) also allows flexible management of radio channels. In the section Network > Wireless You can see a list of all active SSIDs. You can delete the 5 GHz network or change its settings so it doesn't conflict with your main devices.
| Router brand | Menu section | Key option | Action |
|---|---|---|---|
| TP-Link | Wireless / Wireless mode | Smart Connect | Disable merging |
| Asus | Wireless network | 2.4G/5G Tabs | Switch tab |
| Xiaomi | WiFi settings | Dual Band | Turn off the toggle switch |
| Keenetic | My Networks and WiFi | List of networks | Uncheck 5 GHz |
After changing the settings on routers of these brands, it is recommended to reboot the entire device through the menu System or Administrationto ensure that all parameters are applied.
Separating networks and resolving name conflicts
One of the best practices is to use separate network names (SSIDs) for different bands. If your router supports dual band operation but you want to ensure older devices connect to the 2.4 GHz band, give the networks different names. For example, HomeWiFi And HomeWiFi_5G.
This allows you to manually select which network a particular device connects to. A smartphone with high speeds can connect to 5 GHz, while a smart bulb can connect to 2.4 GHz. This approach eliminates issues where a device "jumps" between access points or fails to connect due to attempts to use unsupported protocols.
⚠️ Note: When separating networks, make sure the password (security key) is set the same for both bands if you want to make it easier to remember, or use different complex passwords to increase the security of the guest network.
In some cases, especially on older firmware versions, you may need to change your region. If you're in an area with a lot of networks, selecting the correct region (e.g. Russia or United States) may open additional channels or change the signal strength, which will indirectly affect the stability of operation in the 2.4 GHz range.
Compatibility issues and network security
When switching to 2.4 GHz, it's important to pay attention to security standards. Encryption protocols are critical for this band. WPA2-PSK (AES). The older WEP protocol is vulnerable and can be cracked in minutes, and the newer WPA3 is not yet supported by all devices, which only operate on 2.4 GHz.
Channel width should also be considered. In the 2.4 GHz band, it is recommended to set the channel width 20 MHzSetting the value 40 MHz or Auto In an apartment building, this often leads to severe interference and speed drops, as there are very few free frequency bands.
If you notice your internet speed has dropped below expectations after switching, check to see if you've connected to a neighbor's router with a similar name. Make sure your access point's MAC address matches the one on the label.
Frequently Asked Questions (FAQ)
Does switching to 2.4 GHz affect internet speed?
Yes, the theoretical maximum speed in the 2.4 GHz band is lower than in 5 GHz. However, for browsing, watching HD video, and using a smart home device, this speed is usually sufficient. Actual speed also depends on the noise level in the air.
Is it possible to use both ranges at the same time?
Yes, most modern routers are dual-band. You can leave the 5 GHz band on and simply create a separate 2.4 GHz network with a different name and connect only the devices you need to it.
Why doesn't the router save settings after rebooting?
This may indicate a firmware error or faulty flash memory. Try updating the firmware to the latest version from the manufacturer's official website or performing a hard reset before reinstalling.
Which channel is best for 2.4 GHz?
Non-overlapping channels 1, 6, and 11 are considered the best. Use specialized WiFi analysis apps to select the channel with the lowest signal strength from neighboring routers.