I bought my Lumia 920 about two years ago, and I had no problem with the HERE Drive+ (or its previous version) application. But since a few months ago, the app has stopped delivering turn-by-turn voice directions. I have found nothing wrong with the settings, I have reloaded and changed the voice file but to no avail. This has nothing to do with bluetooth connection to the car's handsfree phone system, because I hear nothing even when bluetooth is turned off. Can anyone suggest what the problem is and how it can be solved?