I have found that generally Verizon carries over the plan you have into new contracts if you are not doing something like swapping out for an upgraded phone--things stay the same if you're lateral. So at the end of two years, if you purchase another iPhone or lesser phone, you'll probably be OK. But, for example, if you have a lesser phone now with unlimited data (i.e. I was still on a Palm Centro) and I upgraded to the iphone after the change, they would probably find some way to stick me to the tiered plan. It's one of the reasons I jumped ahead and got the iPhone sooner rather than later--it was a financial stretch, but hopefully it will save me in the long run.