siri not working over cellular
since up grading to the latest iOS 8.4 Siri suddenly stopped working today on our iPhones 5s'. Siri was working earlier today, using it for direction. When returning home Siri said it didn't have an internet connection, but our cellular service was working, we were able to make calls. Siri alone was disconnected. Siri is working over wifi, but when i turn off wifi to check Siri out, it still says not connected to the internet, even though I am, but works again when I turn on wifi.
iPhone 5s, iOS 8.4