I have my phone paired with the Bluetooth hands-free radio in my car. When I get in the car the phone automatically connects to the car radio. After around 2 minutes (it happens in the same place every time I drive away from home) the phone disconnects from the radio for no apparent reason. It then reconnects after a period of time, again for no apparent reason. It does not give a message when it reconnects, so I don't know how long this takes. Why does it do this and can it be corrected ?