I have an iPhone 5. In December I gave update to IOS 7 and then the horror began. After very little time running the iOS 7 all kinds of errors occurred 4003...4013... 4015 ..... Since then I could not use the phone. This phone is very expensive and we made special efforts to buy now got an object that is not worth anything. If you will not find a solution to this problem I will post on forums and websites dedicated to Apple deterrent message to anyone purchasing this product not expensive and of poor quality. I own several Apple devices: iPod, iPhone 4, iPhone 5, iPad but this experience convinced me to sell them and move to another company that Samsung.