Can i keep my plan if i get an iPhone?

I have a pantech crossover and it is the worst phone ever but the plan is great, its a pay as you go, texts are 2 cents and calling is two dollars a day. I want to keep the plan but get a new phone. Is it possible to get an iphone and keep it or do i have to stick with pantech.

You didn't mention what carrier you have.

The answer is entirely dependent on your carrier - ask them for the correct answer.