I'm use HTC A9 connect to Car Think+ Touch via Bluetooth and enable automatic-record, it no nound and can not record.
  But disable automatic-record, all ok, no problem.
  I'm test all mode that same result.
  How resolve?


HTC Android 6.0 has a minor bug in the ROM related to bluetooth recording - during the call when a recorder start recording the ROM switches audio from the bluetooth device back to the phone earpiece at once, you need to disconnect / reconnect the bluetooth device, then bluetooth recording works.

We found this bug in following phones so far:

HTC 10 Android 6.0
HTC A9 Android 6.0
HTC M8 Android 6.0

No matter what recorder you are using the problem is always there, because the problem is inside the ROM.
Third-party apps can't fix the problem. Users have to wait HTC to fix it in future ROM updates.


HTC 10: HTC 10 Call Recorder
HTC One A9: HTC One A9 Call Recorder
HTC One M9: HTC One M9 Call Recorder
HTC One M8: HTC One M8 Call Recorder
HTC One M7: HTC One M7 Call Recorder
HTC One E9: HTC One E9 Call Recorder
HTC One E8: HTC One E8 Call Recorder