Only available in iOS 5.x
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs:root=General&path=Restrictions"]];
prefs:root=General&path=About
prefs:root=General&path=ACCESSIBILITY
prefs:root=AIRPLANE_MODE
prefs:root=General&path=AUTOLOCK
prefs:root=General&path=USAGE/CELLULAR_USAGE
prefs:root=Brightness