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747 B
WiFi Issues
The Raspberry Pi 3B+ works with WiFi channels 1 through 11, but some networks are configured to use channels 12 or 13. Please check if this is the case with the network giving you problems. The solution would be changing the configuration of the WiFi router so it can operate with channels 1 through 11.
Another potential problem is the frequency being used by your WiFi network. If your WiFi router uses the 5GHz band only, older Raspberry Pi models will not see it. Only the Raspberry Pi 3B Plus, is capable of handling both 2.4GHz and 5GHz. Although our software is developed and supported for the Model 3B+, sometimes people use it on older Raspberry Pis, which in this case, prevents them from accessing 5GHz WiFi networks.