I've been using an iPhone 2G for over a year and I just purchased a refurb iPhone 3G on AT&T. I currently have Unlimited Texting so when I bought the iPhone 3G I signed up for the data plan and iPhone Texting Unlimited. It said the iPhone Texting unlimited would replace my current texting plan. So is there anything else I need to do or will it automatically replace my old texting place which is what I'm thinking? I don't need to do anything to remove the old plan do I?