Most people who use the iphone probably know this one but I could not work it out so I figured others may also get stuck.

I connect to a network where the password changes on a rolling basis. The thing is the iphone still displays the network as it store previouslyconnected networks but just doesn't connect.

So I spent while clicking on the network name in the general settings expecting to be able to edit the password. No can do.

There is this option call "Forget this Network". I was a bit hesitant to click it as I figured that this may mark the network name as one not to use in the future.

Anyway clicking "Forget this Network" actually does as it says and forgets the details allowing you to be in a postion to enter the new password on request.

Pretty simple maybe but so is everything once you know it :)