BX310x Bluetooth Audio


we test the BX310x Dev Kit to build up an audio connection with an android phone.
We can stream audio from phone to dev kit, but in reverse direction it wont work. The audio in jack on the board has no function in this use case?
Is it because A2DP profile only support streaming?

Is it possible to handle a phone call with the BX310x modul?
Do you guys plan to implement more bluetooth profiles in the future like headset profile?

Thanks, keep on the good work.