Hi, I am due to go on holiday to the US (Florida & New York) in the next month. I own a iPhone 3GS which is jailbroken on 02. I was looking to get my phone unlocked and to pay an AT&T sim when I was over there to use in order to get cheaper calls/texts than if I was to use my 02 one. However, do AT&T do any sort of web bundle or "bolt on" which I could buy for 1 month on a pay & go sim? If so, how would I go about doing this or would it need to be when I get over there? Will there be any activation issues/requirements? Many thanks for any help received. Dan.