didRegisterForRemoteNotificationsWithDeviceToken not called with Apigee SDK

Question

I've been trying to register for push notification using Apigee SDK, but on some devices iPhone 5 and 6 don't receive push Notifications. More specifically, neither UIApplication delegate method

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken

or

- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error

are not called.

I got this error when try to send the push notification

There was a problem delivering all of your notifications. See deliveryErrors in properties", "state": "FAILED", "deliveryErrors": [ "No devices for notification e438f4ca-4b46-11e5-8eb8-..." ],

I register with :

if ([self respondsToSelector:@selector(registerUserNotificationSettings:)]) {
            // iOS 8 and higher
            [self registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];
            [self registerForRemoteNotifications];
        } else {
            // iOS 7 and lower
            [self registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeSound)];
        }

On some devices the register is successful but in others not.