Interference caused by neighbors' Wi-Fi signals
Interference caused by neighbors' Wi-Fi signals
I reside in an apartment with several units on the same floor. Noticing my internet speed drops significantly over the 2.4GHz WiFi, I realized there are more than 30 routers operating in that band, evenly spread across channels. Is there a method to reduce interference from neighboring networks without moving to 5GHz? Some of my devices can't use 5GHz.
Are you certain the 2.4G congestion is the main issue, or just a temporary slowdown? Try a wired connection to confirm the problem isn’t with your internet speed at that moment. If it persists, add a 5G plan and switch to it wherever possible, as this will reduce strain on 2.4G. Even if many other devices are using the 2.4 band, they aren't all active simultaneously, making it harder to detect. You might need to perform a brute-force approach, ensuring you have solid coverage in your home so you receive the signal from your own network rather than external sources.
Consider adding a Wi-Fi scanner on your device to identify underused channels and their frequencies, assisting in choosing optimal networks.
APs usually pick channels automatically, often using sub frequencies around 2.435 to 2.450 GHz. This is considered a valid channel. However, many routers switch channels when interference is high, which can disrupt your network. Interference also tends to cluster in certain channels, so changing channels frequently helps. Setting a specific channel manually, like 13, can prevent it from being selected automatically and reduce interference exposure.
Other users are having trouble. The 2.4GHz band has limited space with only three non-overlapping channels. You should consider moving to higher frequencies like UNII/5 GHz or bands such as 60 GHz to reduce interference. Crowded apartments make strong WiFi connections difficult.