Perhaps I have not made the issue I am having clear, the Apple Maps application is not working correctly. Let me reiterate the issue:
When I open the app and select a destination, I then select the directions button and the screen then displays the green GO button. I then select GO to obtain verbal directions and the button fades momentarily but does not activate the verbal directions. It is not the radio that is causing the issue because the app will not activate the verbal directions for the phone speaker either. I can press the GO several times with no result. The app work flawlessly before the latest update I installed a couple of days ago. I have cycled the phone on and off several times and uninstalled and reinstalled the app several times also. I have switched over to Google maps which does the job, but I prefer the way Apple maps works.