Hi, I have an iPhone 5 and the wifi does not seem to working well lately. For example, I'm sitting in my office next to my iMac and PC which are both connected through wifi and the signal strength is excellent. My iPhone 5 can't even detect the wifi network most of the time, and when it does, the signal strength is very weak (1 bar). I find this to be the case at home with my wifi network there as well. Is it a hardware flaw? Or is there a simple fix? Thanks!