Use the WiFi Scanner app to find which channels are least congested while offering you the best signal strength
There is no universal “best” channel for 5GHz frequencies, but there are ways to find out which one’s best for you. Download the WiFi Scanner app, then take a look at what the channel situation is in your area. In order to really make an informed decision on which channel to pick you should read our article about 5Ghz channel selection.
However sticking to the channels in the first “Band” (36, 40, 44, 48), isn't a bad idea as these are designated for domestic use and are least likely to get interference from exterior factors like weather radar. These channels tend to be the “default” channels which means that there will be more people using them. This is why you should use the WiFi Scanner app to find which channels are the least congested while offering you the best signal strength.