Whatsapp had always worked great, only for a couple weeks now, when somebody calls me via WhatsApp, connected to Bluetooth via my Renault Grand unit, I'm unable to see there call convincing in our answer it. If that call is left unanswered, or rejected the app starts a"fake" anonymous cal over Bluetooth of USB. This mutes all the audio on the head unit and shows the can try m on the radio. The fake call needs to be hung up on the radio in order to bring back the original playing audio.