Before you start
- Access to your router settings
Method 1 Find the least crowded channel
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Step 1: Use an analyser app
On Android, try a Wi-Fi analyser app; on Windows, apps like WiFi Analyzer from the Microsoft Store. They show which channels nearby networks use.
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Step 2: Or use Windows command
Run the command below in Terminal to list nearby networks and their channels.
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Step 3: Pick a channel
On 2.4 GHz, choose 1, 6 or 11 (they don’t overlap), whichever has the fewest strong networks. On 5 GHz, pick a channel with no or weak neighbours.
netsh wlan show networks mode=bssidMethod 2 Change the channel in your router
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Step 1: Open wireless settings
Log in to your router and open Wireless (sometimes Advanced Wireless).
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Step 2: Set the channel
For each band, change Channel from Auto to your choice. Keep 2.4 GHz channel width at 20 MHz in crowded areas.
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Step 3: Save and test
Save; devices reconnect. Run speed tests in the problem areas.
Troubleshooting
Some devices disappear after changing 5 GHz channel
Older devices may not support channels 149–165 or DFS channels. Use 36–48.
No improvement
The issue might be distance or walls, not interference. Try router placement or mesh.
Frequently asked questions
Why only 1, 6 and 11?
They’re the only non-overlapping 2.4 GHz channels in most countries; others overlap and add interference.
Does 6 GHz have interference?
Very little today; Wi-Fi 6E/7 on 6 GHz is the cleanest option if your devices support it.
Summary
Scan for crowded channels, then set 1, 6 or 11 on 2.4 GHz and a clear channel on 5 GHz in your router’s Wireless settings. Test before and after; Auto may already be the best choice.
