I managed to configure my bluetooth dongle with my Pi. Now, I have the A2DP profile which allow me to play music through the Pi.
I didn't find found anythings about the HSP/HFP profil for hands free device.
I use bluez solution and I have tried differente configuration but still nothing.
I want to know if somebody have succesfully configure the HSP/HFP profile and if there is another solution to autoconnect the phone when it see the Raspberry.
For the moment, I'll try to test the Ofono solution.