I periodically use Wifi Analyzer (Android App) to see what's going on and then setup both 2.4 & 5 GHz SSIDs on the least congested channels. You have to rememb

I periodically use Wifi Analyzer (Android App) to see what's going on and then setup both 2.4 & 5 GHz SSIDs on the least congested channels. You have to remember that 2.4GHz is also used by microwave ovens and Bluetooth devices - those won't show on the analyzer. Have to watch out for strong signals on non-standard channels (i.e. other than 1, 6, 11, 14). https://en.wikipedia.org/wiki/List_of_WLAN_channels https://en.wikipedia.org/wiki/List_of_WLAN_channels explains the situation well. In my experience the "auto" channel selection option doesn't always work well. Depends on the make and model of your WiFi A/P. WiFi repeaters might also help if you have low signal in areas that you often use your devices.