I have the Cardo Scala G4 and it works great with iPhone 4 except I can't figure out how to use my gps app Sygic Aura through the bluetooth. Apple had me download bluetooth gps navigation. This app is suppose to enable you to hear the directions via bluetooth. I can't get it to work. Did they mislead me? Is there and app out there that would even allow this? Any help would be greatly appreciated.