User location in mapView doesn't show on several simulator devices (MapKit)

I've implemented a mapView that finds the user location and displays it, but the problem is that it doesn't work on iPhone 4S, iPhone 5, iPhone 5S, and iPhone 6 Plus in the iOS simulator, only on iPhone 6. The strange thing is that it works on my real iPhone 5S device.I've implemented a mapView that finds the user