Can i change my plan on verizon?

Ok so i got unlimited talk and text but i don't want the internet because it costing me alot. Can i take the internet plan out for i can pay just for month or do i have to have that data, oh i have a iphone 4

You have to have a data plan to have a smart phone. You can pay for the data plan and not use it, but you will still have to pay for a data plan to use a smart phone.