For what it's worth here's what the AT&T CSR replied to my email enquiry. Mr. John Doe, at initial launch, you will only be able to purchase the 3G iPhone at company owned retail stores (and select kiosks) and Apple stores. At that time, your phone will be activated. You will not go through the iTunes account to activate the new 3G iPhone like you did with your current iPhone. While your phone is being activated, the representative will apply the new contract and the new data plan at that time. The new iPhone data plans do not include messaging. It only includes unlimited internet/email. At this time there is no information regarding the text messaging feature. You did understand correctly regarding your rollover minutes. If you keep the same rate plan, you will retain all of your rollover minutes. Note: My emphasis added.