Vlingo for iPhone 2.0 and later supports Bluetooth headsets that are A2DP compliant. However, Vlingo does not yet support other types of Bluetooth devices such as car mounted systems.
To prevent Vlingo for iPhone from trying to communicate with your in-vehicle system, disable Bluetooth access from the iPhone Settings while in your vehicle:
- Tap Settings on the iPhone then General > Bluetooth
- Slide the switch to "Off"