So I've been experiencing the same iPhone 5 wifi issues that many people seem to have...poor signal strength or lack of a signal at all. I've tried all of the suggestions as far as router configuration to no avail. I did notice, however, that wifi on the phone seemed to work perfectly when I was in close proximity to my wifi router. So I moved my router to a location in my house that is closer to where I spend most of my time. Once I did this, I learned that the distance between the phone and the router wasn't the problem, but rather the phone seems to require a clear line of sight to the router. Furthermore, the new router location is next to a window and when I take the phone outside and stand next to that window I get no reception, even though the phone is no more than 2 feet from the router with nothing more than a thin piece of glass between them. All my other iDevices work fine in and around my house. Does this make sense to anyone?