OK- this was my experience- for what it is worth. It is entirely possible that they were lying/confused/being controlled by aliens, but this is what multiple people told me repeatedly and confirmed: 1. With the unlimited data plan I got today, I will be grandfathered for the future to transfer this plan to new smartphones, including the next iphone. 2. This plan includes unlimited 4G, and when/if/whenever it happens, a new iphone will get unlimited 4G data from my same plan when it is ported to a new iPhone that supports it. In other words, in no uncertain terms as confirmed multiple times through multiple sales people and managers in the Irvine Spectrum verizon store, their unlimited plan will give you unlimited 4G when you buy an iPhone 4 today and upgrade in the future to an iPhone that supports 4g. I was direct and specific, and so were they in their answers. Of course they could eb lying, but after the direct confirmation I got rom employees about 4G data being part of my plan when I get a device that supports it and it being unlimited, I would say they would be setting themselves up for a lawsuit if they did not honor what they said today.