Now a days , Use of WiFi Spectrum (both 2.4GHz and 5.8GHz bands) with so many devices , signal congestion would be a problem in neighborhoods.
But Don’t worry , By changing the broadcast channel of your router may help. Most modern routers offer an automatic mode, which samples local traffic and dynamically assigns a clear channel as needed.
This is usually worth trying first. If that doesn’t work, use a WiFi traffic monitor like iStumbler on the Mac or a WiFi Finder app for the iPhone/iPad to see what’s going on in your area.
You may be amazed at how much traffic you see, far more than the Airport menu typically displays. See what channels are used by surrounding networks, then choose something a few steps away from crowded choices.
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