Running Firmware 6.1.0 build 1419 on a Surf Soho configured to use the 2.4GHz wireless band. Rather than specify a fixed channel, the device was set to “auto”.
In a crowded Wi-Fi area, the device chose to use channel 8. From my understanding of the technology, it is better to stick to channels 1, 6 and 11.
For example, if there are three Wi-Fi networks using channels 5, 6 and 7, my understanding is that they would all benefit from being on channel 6. The Wi-Fi protocol allows for sharing a channel, so they will all see other and co-ordinate their usage of the channel. Much like Ethernet. While one network may slow down due to another network using massive bandwidth, at least they won’t interfere with each other. When they are using channels 5, 6 and 7 each network will see the adjacent channels as noise and interference, which is worse.
I am not an expert on this, but from what I judge to be reliable sources, sticking to channels 1, 6 and 11 is best for everyone.