voiceCallService start automatically

We were able to playback audio using PCM after it was enabled:

We didn’t want to use the digital mic, instead we plugged in a headset after hardware modification by moving resistor on mangoh yellow. (our distributor did this for us)

Thank you @jwolla and @jyijyi. I will try it again. We have decided to use a headset as you mentioned. I will inform you after trying it.