Can't hear over Bluetooth headset

On my ubuntu phone when connected to Bluetooth headset or "hands free" in the car at the украл of the call I can't hear the caller and cannot hear я (The device successfully mated). I tried to choose different options for the proposed source playback: Speaker phone, Блуетоот Еадсет, phone. Everything works, except the Блуетоот Еадсет.

How do I определил what is it?

bq aquarius e4.5 ubuntu edition