I have insurance from AT&T and i have an iphone 5S?

My iphone 5S is not working properly. I would like to get a new one. Since i have insurance, how would I go about getting a new phone? Is there a price I have to pay?

If you go to the AT&T store, they should be able to help you there. When I got my android replaced i got the replacement free. They paid shipping for the new phone as well as for me to ship them my old broken phone.