Portable device share file wirelessly by building temporary AP with a random channel.For example, in the above photo snap situation, channel 4 and 6 is much better than channel 11. if you can find a channel with lesser overlapping you should have better experience. If you need to use free WiFi in the street, you may choose one with strongest signal strength, but it is not always the fastest network.For example, in the above photo snap situation, channel 8 and 9 is much better than others. Choose a right channel for your AP is very important. That means the signal substantially overlapped and interference degrade the network performance. At my home and office, I can found over 20 AP SSID but 2.4 GHz only have 11 channels. ![]() WiFi everywhere now and 2.4 GHz is still most compatible frequency.WiFi Analyzer is very useful in some situations:
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