I just moved into a new apartment for school, and there's a ridiculous amount of Wifi here. The US channels (1-11) seem to all be saturated, so I decided to give channel 14 a try. It worked great on my devices that can connect to it (including an old iPhone 4 oddly enough), but my 4S refuses to connect. I would just switch to a 5GHz router, but unfortunately the iPhone doesn't support it...