As I said, those apps are not working: calendar, safari, mail, maps, what happened after updating to iOS 6.1.3. The device is an iPhone 3GS which was wearing a version of IOS 5.0.1 (I think...). I took it to a service to updated to 6.1.2 and jerk updated it to 6.1.3, after that those applications not working. Has someone had experience with this problem? How can I solve this problem?