My advise is to keep the unlimited plan as long as you can. I plan to pay full retail for my next upgrade so I can keep the unlimited plan. While the phone will cost a lot more in the long run it will be cheaper and I don't have to worry about going over. Even if I get throttled it is only for the month you use to much by VZW's standards and only when you are on a tower that has high usage at that pictular time. If I only had smart phones on my plan, the share everything may make since. But at $30 as opposed to 9.99 a line for a basic phone it is too much for me and I don't need unlimited minutes.