My iphone has suddenly decided not to accept any wifi passwords. It was working fine one moment and then suddenly everything is incorrect password. I have two wifi connections at home, and one of them had the password saved from before and it worked fine, but i reset the settings on the other connection and realized that i couldnt connect to it. I realized that I was having similar problems at a coffee shop recently. I looked online, and some people said that resetting the network settings would work, but now I cant connect to any network at all! it keeps saying password is incorrect. I have tried most of the common suggestions, and am now updating to the latest OS to see if it helps. Does any one have a solution to this?! Edit: I am on iOS 6, and was going to uodate to the latest version. But lo and behold, at the backup phase I keep getting the 'could not backup iphone because an error has occurred'. WTF.