So here's a copy and paste of the thread I posted on reddit.

So here's the backstory. I currently have an LG Ally, and my parents both have BlackBerries. They say are phone bill is to much and want to lower it. They decided that they'l just go with non-smart phones while I stick to my LG Ally. But I've had my LG Ally for a while and it kind of sucks, not that I'm ripping on android, but the phones hardware is horrible. So I have enough money to get an iPhone 4 16GB. If my dad let's me use his early upgrade discount I can get for $100.
My main question is: Are there any certain plans that have to go with the iPhone 4?
also would it raise the cost of our current plan? And what would be the best plan for us?
(Both parents want non-smartphones and I, hopefully, will be getting an iPhone)

Our carrier is Verizon.