my iphone 5 suffers from poor wifi as well , with my iphone 4s it shows 8 wifi networks in the area while the iphone 5 stuggles to find my wifi network , this problem has come after ios 6.1 , i see an update for the 4s is out but the iphone 5 needs an update to sort out the poor wifi connection , no resetting ect works its an iphone 5 problem as a freind of mine has the same problem with her iphone 5 , apple need to sort out its buggy firmware problems , i would rather wait an extra week or so for a bug free update than the rubbish apple is releasing.