Your channel settings are saved. If you use WiFi extenders, and you changed your routers wireless channels, you must also set your extenders up to use the same channels as your router. For more information: How do I resolve poor wireless range or a weak WiFi signal from my NETGEAR router? What are Preferred Scanning Channels in the 6 GHz band?
Microwave ovens, cordless phones, even Bluetooth devices could be using the same channel. Changing your Wi-Fi channel can mean better download speeds, less lag when gaming, and greater range. If you want to learn more about Wi-Fi channels, read on. If you just want to change the channel on your router, keep scrolling.

Figure 1 How to Change Your WiFi Channel Step-by-Step Guide Login to your router access the admin panel at your router's IP address. Go to wireless settings find "Channel" or "WiFi Channel" option. Select a new channel for 2.4GHz, use channels 1, 6, or 11 (non-overlapping). For 5GHz, any channel works.

How do I access my routers settings to change the Wi-Fi channel? To access your routers settings, youll need to open a web browser and type in the routers IP address.

Moving forward, it's essential to keep these visual contexts in mind when discussing Change G Router Wireless Channel.
Change the Wireless Router Channel Number to Avoid Interference.