How much do iphones cost mothly?

So i'm planning on buying an iphone 4s for my birthday, but i'm not sure about how much it costs monthly. I'm planning on either buying it from verizon or at&t. If i want to get text and internet, how much would it be? Could i get like 400 texts instead of unlimited? I probably couldnt get it if it was too expensive.

Go to the apple website, and click "buy iPhone." You go through all the steps, and you choose what you want. At the end it'll tell you the exact price for your custom plan.

I have unlimited text and data with iPhone 4s AT&T. I pay with tax $108.00 a month. Every one else with a contract is comparable. I also have a 4s with prepaid AT&T and that's $53 a month unlimited, but ou have to bring your own phone