my voice command , after contecting me to 3 different numbers, is now saying "unable to allocate audio channel. Close other applications and try again." how do I find out what app is causing the problem? I did push the camera button but as far as I can tell it is off. Can you, please, help me get voice command back as it makes driving so much safer if I just have to tell the phone to dial someone instead of finding the number then going through the prompts to have the number ddialed?