How to Change the Wi-Fi Frequency Band on a Router: A Step-by-Step Guide

Is your internet speed dropping, video lagging, and pages taking forever to load? The problem could be an incorrectly selected Wi-Fi frequency band. Modern routers support two main bands: 2.4 GHz And 5 GHz, each of which has its own pros and cons. For example, 2.4 GHz It passes through walls better, but is often overloaded by neighboring networks, and 5 GHz faster, but fades out faster over distance.

Changing the Wi-Fi band or channel is one of the first recommendations when optimizing your home network. But how do you do it correctly to avoid making the situation worse? In this article, we'll cover step-by-step instructions for popular router models (TP-Link, ASUS, Keenetic, Zyxel), we'll explain which range to choose depending on your needs and warn you against common mistakes. You'll also learn how to check channel load and why automatic selection isn't always optimal.

Why change Wi-Fi frequency bands?

Before you go into your router settings, it's important to understand Why is this necessary?Main reasons:

• 📉 Slow internet speed - if the devices are connected to a congested channel 2.4 GHz, where dozens of neighboring networks operate.
• 🏠 Weak signal in distant rooms — range 5 GHz faster, but passes through obstacles worse.
• 🎮 Lag in online games or 4K video — for a stable connection, it is better to use a less crowded range.
• 🔄 Conflicts with other devices - microwaves, wireless mice and even baby monitors work on 2.4 GHz and may create interference.

For example, if you live in an apartment building where every other network broadcasts on Channel 6 (the most popular in 2.4 GHz), your Wi-Fi will constantly "compete" for airtime with neighboring routers. Switching to 5 GHz or a less loaded channel can increase the speed by 2-3 times.

2.4 GHz vs. 5 GHz: Which Band Should You Choose?

The choice between 2.4 GHz And 5 GHz It depends on your goals. Here's a comparison table:

🔹 Choose 2.4 GHz if:

• 📱 Do you have old devices (eg. smart light bulbs or printers) that do not support 5 GHz.
• 🏡 You need to cover a large area (dacha, office with thick walls).
• 💰 Your plan is up to 100 Mbps — there will be no difference in speed.

🔹 Choose 5 GHz if:

• 🎮 You need maximum speed for gaming, 4K video, or file downloads.
• 🏢 You live in an apartment building with a large number of networks.
• 📱 All your devices support Wi-Fi 5 (802.11ac) or later.

How to check Wi-Fi channel load?

Before changing settings, you need to find out which channels are free. To do this, use special programs:

• 🖥️ Windows: NetSpot, WiFi Analyzer (from Microsoft Store), inSSIDer.
• 📱 Android: WiFi Analyzer (from farproc), NetX.
• 🍎 macOS/iOS: NetSpot, AirPort Utility (for Mac).

Example of analysis in WiFi Analyzer:

1. Open the program and wait for the networks to be scanned.
2. Go to the tab Channel Rating (or similar).
3. Check out what channels are in 2.4 GHz or 5 GHz the least loaded (usually this is 1, 11 or 14 For 2.4 GHz And 36–48 or 149–165 For 5 GHz).

Why is channel 6 in 2.4 GHz the busiest?

Most routers default to channel 6, as it's considered the "golden mean" between interference from channels 1 and 11. However, this also causes it to be the most congested.

📌 Important: In the range 2.4 GHz channels overlap. For example, if a neighbor uses Channel 4, and you will choose Channel 5, there will still be interference. Optimal non-overlapping channels are 1, 6 And 11.

Step-by-step instructions: how to change the Wi-Fi range on a router

The setup process varies depending on your router model, but the general process is the same. Let's look at instructions for popular brands.

1. TP-Link (Archer, TL-WR, Deco)

Instructions for firmware TP-Link (including Archer C6, TL-WR841N, Deco M4):

1. Open your browser and type 192.168.0.1 or 192.168.1.1 (the address is indicated on the router sticker).
2. Enter your login and password (usually by default admin/admin).
3. Go to Wireless → Wireless Settings.
4. In the section Basic settings select:
• Band: 2.4GHz or 5GHz (if the router is dual-band).
• Channel: select manually (eg 11 For 2.4 GHz or 36 For 5 GHz).

Click Save and reboot the router.

2. ASUS (RT-AC, RT-AX, ZenWiFi)

For routers ASUS (For example, RT-AC68U, RT-AX88U):

1. Go to the panel at the address router.asus.com.
2. Go to Wireless Network → General.
3. In the block Frequency range select 2.4GHz or 5GHz.
4. In the field Channel set the value manually (eg Auto → 149 For 5 GHz).
5. Click Apply.

3. Keenetic (Giga, Hero, Extra)

For routers Keenetic (For example, Keenetic Giga, Hero):

1. Enter in your browser my.keenetic.net.
2. Go to Wi-Fi network → Access point.
3. Select a network (Main or Guestbook) and press Change.
4. In the section Radio please specify:
• Band: 2.4 GHz or 5 GHz.
• Channel: select from the list (for example, 161 For 5 GHz).

Save the changes.

4. Zyxel (Keenetic, NBG)

For models Zyxel Keenetic or NBG6617:

1. Open 192.168.1.1.
2. Go to Wi-Fi Network → Access Point.
3. In the block Basic settings select:
• Band: 2.4 GHz or 5 GHz.
• Channel: install manually (eg 13 For 2.4 GHz).

Click Apply.

Common mistakes and how to avoid them

When changing Wi-Fi bands, many users make mistakes that only make the situation worse. Here are the most common ones:

• 🔄 Automatic channel selection — the router can select a busy channel, considering it "optimal". Always check the load manually using WiFi Analyzer and install the channel yourself.
• 📶 Using the wide 2.4 GHz channel - width 40 MHz increases speed, but creates interference for neighboring networks. 2.4 GHz always put 20 MHz.
• 🔒 No separation of networks - if you have one SSID for 2.4 GHz And 5 GHz, devices may connect to a slow range. It's better to separate networks (for example, MyWiFi_2G And MyWiFi_5G).
• 🔄 Unsaved settings - After changing the channel or range, always press Save and reboot the router.

⚠️ Attention: If Wi-Fi disappears completely after changing settings, check that you haven't accidentally disabled the wireless network in the settings. Connect to the router via cable and reset the settings.

Additional settings for Wi-Fi optimization

Changing the range is only part of the optimization. To maximize network performance, pay attention to these parameters:

• 🔄 Operating mode (Mode): In Wi-Fi settings, select:
• 802.11b/g/n For 2.4 GHz (compatible with older devices).
• 802.11a/n/ac/ax For 5 GHz (maximum speed).
• 📶 Transmit Power: If the signal is weak, increase the power to 100%In apartment buildings it can be reduced to 50–75%to reduce disturbance to neighbors.
• 🔒 Network protection: Use WPA3 (or WPA2-PSK) to avoid unauthorized connections that steal speed.
• 🔄 Transmission time (Beacon Interval): Set value 100 (default) - a lower value increases the network load.

📌 Flashing your router for new features:

If your router is older than 3-4 years, its firmware may not support Wi-Fi 6 or flexible channel settings. Check for updates in the section System → Software UpdateFor example, for ASUS RT-AC68U after upgrading to Asuswrt-Merlin an expanded selection of channels appears in 5 GHz (including DFS).

⚠️ Attention: Channels 50–144 in the range 5 GHz (the so-called DFS(channels) may change automatically if the router detects radar interference. This is normal, but may cause brief connection interruptions.

What should I do if Wi-Fi doesn't work after changing the band?

Sometimes, after changing settings, the network disappears or devices fail to connect. Here's the solution:

1. Check the cable connection: Connect your computer to the router via Ethernet and go to the control panel. If you have access, the problem is in your Wi-Fi settings.
2. Reset settings to default: Click the button Reset on the router (hold for 10 seconds) and configure the network again.
3. Check device compatibility: Older smartphones or laptops may not support 5 GHzTry connecting to 2.4 GHz.
4. Update your Wi-Fi drivers: On your computer or laptop, update the network card drivers via device Manager.
5. Check your regional settings: In some countries, certain channels are banned (eg. 12–14 V 2.4 GHz (in the USA). Make sure the correct region is selected in your router settings.

📌 If the router does not save settings:

• Try a different browser (for example, Chrome or Firefox).
• Clear your browser cache.
• Disable ad blockers (they may interfere with the web interface).

FAQ: Frequently Asked Questions about Setting Up Wi-Fi Bands

Is it possible to use both bands (2.4GHz and 5GHz) at the same time?

Yes, if your router is dual-band. Enable both bands and give them different names (e.g. MyWiFi_2G And MyWiFi_5G). Modern devices will automatically select the optimal one, and older ones will connect to 2.4 GHz.

Which 5GHz channel is the most stable?

In the range 5 GHz best channels - 36–48 And 149–165. Channels 50–144 (DFS) channels may automatically change when radar signals are detected, causing brief interruptions. For gaming and streaming, choose non-DFS channels.

Why didn't the speed increase after changing the channel?

There are several reasons:

• The channel is still loaded (check again in WiFi Analyzer).
• The problem is not in the channel, but in the provider’s tariff or the router settings (for example, it is turned on QoS).
• The device is connected to 2.4 GHz, even though you changed the settings 5 GHz.

Is it possible to increase the strength of a Wi-Fi signal?

Yes, there is a setting in the router settings. Transmit Power (Transmission Power) Set the value 100%, but remember: too strong a signal can interfere with neighboring networks and even violate local radio frequency laws.

How to separate 2.4 GHz and 5 GHz networks into different SSIDs?

In most routers this is done like this:

1. Go to Wi-Fi settings.
2. For each range (2.4 GHz And 5 GHz) specify different names (for example, Home_2G And Home_5G).
3. Save the settings and reboot the router.

After this, devices will be able to choose which network to connect to.