If you access a WiFi spot regularly - like at home or work - you don't have to sign in every time you turn on WiFi. The iPhone remembers the creds. My question is - how do you access that information in case the home or work password changes? The iPhone is now holding on to old information which needs to change to reflect the new username or password. I can't seem to find out how or where to do this. Does anyone know where to go?