I was poking around with my wifi today and noticed that there are probably 25 other wifi networks 'visible' on my machine. That got me thinking would it be better to pick a channel that those others machines are not using, and then it got me thinking if some wifi routers offer channels that others do not? I seem to recall in an HK router that I have it asked me to pick a region in the setup, and then I saw something on wikipedia that other countries use different channels.
List of WLAN channels - Wikipedia, the free encyclopedia
So if I had a US wifi router with a US computer (and a US wifi card) could I benefit by using a channel not available in Asia to (likely) avoid interference from other routers and networks near me, or is my understanding of wifi channels a bit off?