In practice, you walk into the store, tell them its not working properly and they will either take back the item you have claimed to be defective or replace the

In practice, you walk into the store, tell them its not working properly and they will either take back the item you have claimed to be defective or replace the item. In general, Apple's retail stores are extremely straight forward, offer great customer service, and don't yank you around like other brick and mortar retailers.